LTC1693

TYPICAL APPLICATIO

DESCRIPTIO

FEATURES

APPLICATIO S

High Speed Single/Dual

N-Channel MOSFET Drivers

Dual MOSFET Drivers in SO-8 Package
or Single MOSFET Driver in MSOP Package

Electrical Isolation Between the Dual Drivers

Permits High/Low Side Gate Drive

1.5A Peak Output Current

16ns Rise/Fall Times at V

= 12V, C

= 1nF

Wide V

Range: 4.5V to 13.2V

CMOS Compatible Inputs with Hysteresis,
Input Thresholds are Independent of V

Driver Input Can Be Driven Above V

Undervoltage Lockout

Thermal Shutdown

The LTC

1693 family drives power N-channel MOSFETs

at high speed. The 1.5A peak output current reduces
switching losses in MOSFETs with high gate capacitance.

The LTC1693-1 contains two noninverting drivers while
the LTC1693-2 contains one noninverting and one invert-
ing driver. These dual drivers are electrically isolated and
independent. The LTC1693-3 is a single driver with an
output polarity select pin.

All MOSFET drivers offer V

independent CMOS input

thresholds with 1.2V of typical hysteresis. They can level-
shift the input logic signal up or down to the rail-to-rail V

drive for the external MOSFET.

The LTC1693 contains an undervoltage lockout circuit and
a thermal shutdown circuit that disable the external
N-channel MOSFET gate drive when activated.

The LTC1693-1 and LTC1693-2 come in an 8-lead SO pack-
age. The LTC1693-3 comes in an 8-lead MSOP package.

Power Supplies

High/Low Side Drivers

Motor/Relay Control

Line Drivers

Charge Pumps

Two Transistor Forward Converter

, LTC and LT are registered trademarks of Linear Technology Corporation.

12V

BOOST

SENSE

PHASE

RUN/SHDN

R6 100

R7 100

BAT54

R8
301k
1%

R2
5.1

R10
10k
1%

C15
0.1

C14

3300pF

C11
0.1

C12
100pF

C8
1

C3
4700pF
25V

0.1

1.5

13:2

OUT

1.5V/15A

RETURN

1693 TA01

C13
1

C1: SANYO 63MV330GX
C2: WIMA SMD4036/1.5/63/20/TR
C6: KEMET T510X477M006AS (

L1: GOWANDA 50-318
T1: GOWANDA 50-319

C5
1

C10
0.1

1800pF

NPO

R9
12k

R5
2.49k
1%

12V

RETURN

48VDC

10%

SYNC

REF

SL/ADJ

AVG

REF

PGND

SGND

LT1339

LTC1693CS8-2

MURS120

IN1

GND1

IN2

GND2

CC1

OUT1

CC2

OUT2

LTC1693CS8-2
IN1

GND1

IN2

GND2

CC1

OUT1

CC2

OUT2

MBRO530T1

D3
MURS120

Q1
MTD20NO6HD

D1
MURS120

C2
1.5

63V

C1
330

63V

MTD20NO6HD

Si4420

R1
0.068

Si4420

C6
470

6.3V

R3
249

R4
1.24k
1%

LTC1693

ABSOLUTE

AXI

RATINGS

Supply Voltage (V

) .............................................. 14V

Inputs (IN, PHASE) ................................... 0.3V to 14V
Driver Output ................................. 0.3V to V

+ 0.3V

GND1 to GND2 (Note 5) .....................................

100V

Junction Temperature .......................................... 150

Operating Ambient Temperature Range

C-Grade ................................................... 0

C to 70

I-Grade ................................................40

C to 85

Storage Temperature Range ................. 65

C to 150

Lead Temperature (Soldering, 10 sec).................. 300

PACKAGE/ORDER I

FOR

ATIO

ORDER PART

NUMBER

S8 PART

MARKING

LTC1693-1CS8
LTC1693-1IS8

16931
16931I

TOP VIEW

CC1

OUT1

CC2

OUT2

IN1

GND1

IN2

GND2

S8 PACKAGE

8-LEAD PLASTIC SO

JMAX

= 150

= 135

C/ W

TOP VIEW

CC1

OUT1

CC2

OUT2

IN1

GND1

IN2

GND2

S8 PACKAGE

8-LEAD PLASTIC SO

JMAX

= 150

= 135

C/ W

ORDER PART

NUMBER

S8 PART

MARKING

LTC1693-2CS8
LTC1693-2IS8

16932
16932I

1
2
3
4

PHASE

GND

8
7
6
5

OUT
NC
NC

TOP VIEW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

JMAX

= 150

= 200

C/ W

ORDER PART

NUMBER

MS8 PART

MARKING

LTC1693-3CMS8

LTEB

Consult factory for Industrial and Military grade parts.

ELECTRICAL CHARACTERISTICS

The

denotes specifications which apply over the full operating

temperature range, otherwise specifications are at T

= 25

C. V

= 12V, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

4.5

13.2

Quiescent Current

LTC1693-1, LTC1693-2, IN1 = IN2 = 0V (Note 2)

400

720

1100

LTC1693-3, PHASE = 12V, IN = 0V

200

360

550

CC(SW)

Switching Supply Current

LTC1693-1, LTC1693-2, C

OUT

= 4.7nF, f

= 100kHz

14.4

LTC1693-3, C

OUT

= 4.7nF, f

= 100kHz

7.2

Input

High Input Threshold

2.2

2.6

3.1

Low Input Threshold

1.1

1.4

1.7

Input Pin Bias Current

0.01

PHASE Pin High Input Threshold

(Note 3)

4.5

5.5

6.5

PHASE Pin Pull-Up Current

PHASE = 0V (Note 3)

Output

High Output Voltage

OUT

= 10mA

11.92

11.97

Low Output Voltage

OUT

= 10mA

ONL

Output Pull-Down Resistance

2.85

ONH

Output Pull-Up Resistance

3.00

PKL

Output Low Peak Current

1.70

PKH

Output High Peak Current

1.40

(Note 1)

LTC1693

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switching Timing (Note 4)

RISE

Output Rise Time

OUT

= 1nF

17.5

OUT

= 4.7nF

48.0

FALL

Output Fall Time

OUT

= 1nF

16.5

OUT

= 4.7nF

42.0

PLH

Output Low-High Propagation Delay

OUT

= 1nF

38.0

OUT

= 4.7nF

40.0

PHL

Output High-Low Propagation Delay

OUT

= 1nF

OUT

= 4.7nF

Driver Isolation

ISO

GND1-GND2 Isolation Resistance

LTC1693-1, LTC1693-2 GND1-to-GND2 Voltage = 75V

0.075

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.

Note 2: Supply current is the total current for both drivers.

Note 3: Only the LTC1693-3 has a PHASE pin.

Note 4: All AC timing specificatons are guaranteed by design and are not
production tested.

Note 5: Only applies to the LTC1693-1 and LTC1693-2.

TYPICAL PERFOR A CE CHARACTERISTICS

IN Threshold Voltage vs V

TEMPERATURE (

INPUT THRESHOLD HYSTERESIS (V)

1.2

1.3

1.4

1693 G03

1.1

1.0

100

125

0.9

0.8

= 12V

-V

IN Threshold Hysteresis
vs Temperature

IN Threshold Voltage
vs Temperature

(V)

2.00

2.25

2.75

1693 G01

1.75

1.50

1.25

1.00

2.50

INPUT THRESHOLD VOLTAGE (V)

= 25

TEMPERATURE (

INPUT THRESHOLD VOLTAGE (V)

2.75

1693 G02

2.00

1.50

1.25

1.00

3.00

2.50

2.25

1.75

100

125

= 12V

The

denotes specifications which apply over the full operating

temperature range, otherwise specifications are at T

= 25

C. V

= 12V, unless otherwise noted.

LTC1693

TYPICAL PERFOR A CE CHARACTERISTICS

PHASE Threshold Voltage vs V

Rise/Fall Time vs V

(V)

RISE

FALL

1693 G05

TIME (ns)

= 25

OUT

= 1nF

= 100kHz

Rise/Fall Time vs C

OUT

Propagation Delay vs Temperature

Propagation Delay vs V

Output Saturation Voltage
vs Temperature

Propagation Delay vs C

OUT

TEMPERATURE (

OUTPUT SATURATION VOLTAGE (mV)

100

150

200

35 15

1693 G11

85 105 125

(50mA) wrt V

(10mA) wrt V

(50mA)

(10mA)

= 12V

Quiescent Current
vs V

(Single Driver)

(V)

PHASE THRESHOLD VOLTAGE (V)

1693 G04

= 25

PH(H)

PH(L)

TEMPERATURE (

TIME (ns)

1693 G06

100

125

= 12V

OUT

= 1nF

= 100kHz

RISE

FALL

Rise/Fall Time vs Temperature

(V)

TIME (ns)

1693 G08

PLH

PHL

= 25

OUT

= 1nF

= 100kHz

TEMPERATURE (

TIME (ns)

1693 G09

PLH

PHL

100

125

= 12V

OUT

= 1nF

= 100kHz

OUT

(pF)

TIME (ns)

100

1000

10000

1693 G10

= 25

= 12V

= 100kHz

PLH

PHL

(V)

100

QUIESCENT CURRENT (

200

350

1693 G12

150

300

250

= 25

= 0V

OUT

(pF)

TIME (ns)

100

1000

10000

1693 G07

120

= 25

= 12V

= 100kHz

RISE

FALL

LTC1693

TYPICAL PERFOR A CE CHARACTERISTICS

Switching Supply Current
vs C

OUT

(Single Driver)

vs Output Current

OUT

(pF)

SWITCHING SUPPLY CURRENT (mA)

100

1000

10000

1693 G13

750kHz

500kHz

200kHz
100kHz

25kHz

= 25

= 12V

OUTPUT CURRENT (mA)

(mV)

150

200

250

350

1693 G15

100

300

90 100

20 30

= 25

= 12V

vs Output Current

OUTPUT CURRENT (mA)

(mV)

100

200

300

150

250

1693 G14

100

= 12V

= 25

AMBIENT TEMPERATURE (

POWER DISSIPATION (mW)

200

600

800

1000

105

1400

1693 G16

400

35 15

125

1200

= 125

LTC1693-3

LTC1693-1/LTC1693-2

Thermal Derating Curves

LTC1693

CTIO

SO-8 Package (LTC1693-1, LTC1693-2)

IN1, IN2 (Pins 1, 3): Driver Inputs. The inputs have V

independent thresholds with 1.2V typical hysteresis to
improve noise immunity.

GND1, GND2 (Pins 2, 4): Driver Grounds. Connect to a
low impedance ground. The V

bypass capacitor should

connect directly to this pin. The source of the external
MOSFET should also connect directly to the ground pin.
This minimizes the AC current path and improves signal
integrity. The ground pins should not be tied together if
isolation is required between the two drivers of the
LTC1693-1 and the LTC1693-2.

OUT 1, OUT2 (Pins 5, 7): Driver Outputs. The LTC1693-
1's outputs are in phase with their respective inputs (IN1,
IN2). The LTC1693-2's topside driver output (OUT1) is in
phase with its input (IN1) and the bottom side driver's
output (OUT2) is opposite in phase with respect to its input
pin (IN2).

CC1

, V

CC2

(Pins 6, 8): Power Supply Inputs.

MSOP Package (LTC1693-3)

IN (Pin 1): Driver Input. The input has V

independent

thresholds with hysteresis to improve noise immunity.

NC (Pins 2, 5, 6): No Connect.

PHASE (Pin 3): Output Polarity Select. Connect this pin to
V

or leave it floating for noninverting operation. Ground

this pin for inverting operation. The typical PHASE pin
input current when pulled low is 20

GND (Pin 4): Driver Ground. Connect to a low impedance
ground. The V

bypass capacitor should connect directly

to this pin. The source of the external MOSFET should also
connect directly to the ground pin. This minimizes the AC
current path and improves signal integrity.

OUT (Pin 7): Driver Output.

(Pin 8): Power Supply Input.

CC1

LTC1693-1

DUAL NONINVERTING DRIVER

OUT1

IN1

GND1

CC2

OUT2

IN2

GND2

LTC1693-3

SINGLE DRIVER WITH

POLARITY SELECT

OUT

GND

1693 BD

PHASE

CC1

LTC1693-2

TOPSIDE NONINVERTING DRIVER

AND BOTTOM SIDE INVERTING DRIVER

OUT1

IN1

GND1

CC2

OUT2

IN2

GND2

BLOCK DIAGRA S

LTC1693

APPLICATIO

S I

FOR

ATIO

Overview

The LTC1693 single and dual drivers allow 3V- or 5V-based
digital circuits to drive power MOSFETs at high speeds. A
power MOSFET's gate-charge loss increases with switch-
ing frequency and transition time. The LTC1693 is capable
of driving a 1nF load with a 16ns rise and fall time using a
V

of 12V. This eliminates the need for higher voltage

supplies, such as 18V, to reduce the gate charge losses.

The LTC1693's 360

A quiescent current is an order of

magnitude lower than most other drivers/buffers. This
improves system efficiency in both standby and switching
operation. Since a power MOSFET generally accounts for
the majority of power loss in a converter, addition of the
LT1693 to a high power converter design greatly improves
efficiency, using very little board space.

The LTC1693-1 and LTC1693-2 are dual drivers that are
electrically isolated. Each driver has independent opera-
tion from the other. Drivers may be used in different parts
of a system, such as a circuit requiring a floating driver and
the second driver being powered with respect to ground.

Input Stage

The LTC1693 employs 3V CMOS compatible input thresh-
olds that allow a low voltage digital signal to drive

standard

power MOSFETs. The LTC1693 incorporates a 4V internal
regulator to bias the input buffer. This allows the 3V CMOS
compatible input thresholds (V

= 2.6V, V

= 1.4V) to be

independent of variations in V

. The 1.2V hysteresis

between V

and V

eliminates false triggering due to

ground noise during switching transitions. The LTC1693's
input buffer has a high input impedance and draws less
than 10

A during standby.

Output Stage

The LTC1693's output stage is essentially a CMOS in-
verter, as shown by the P- and N-channel MOSFETs in
Figure 1 (P1 and N1). The CMOS inverter swings rail-to-
rail, giving maximum voltage drive to the load. This large
voltage swing is important in driving external power
MOSFETs, whose R

DS(ON)

is inversely proportional to its

gate overdrive voltage (V

DRAIN

POWER
MOSFET

(LOAD INDUCTOR
OR STRAY LEAD
INDUCTANCE)

OUT

GND

LTC1693

1693 F01

Figure 1. Capacitance Seen by OUT During Switching

The LTC1693's output peak currents are 1.4A (P1) and
1.7A (N1) respectively. The N-channel MOSFET (N1) has
higher current drive capability so it can discharge the
power MOSFET's gate capacitance during high-to-low
signal transitions. When the power MOSFET's gate is
pulled low by the LTC1693, its drain voltage is pulled high
by its load (e.g., a resistor or inductor). The slew rate of the
drain voltage causes current to flow back to the MOSFETs
gate through its gate-to-drain capacitance. If the MOSFET
driver does not have sufficient sink current capability (low
output impedance), the current through the power
MOSFET's Miller capacitance (C

) can momentarily pull

the gate high, turning the MOSFET back on.

Rise/Fall Time

Since the power MOSFET generally accounts for the ma-
jority of power lost in a converter, it's important to quickly
turn it either fully "on" or "off" thereby minimizing the tran-
sition time in its linear region. The LTC1693 has rise and
fall times on the order of 16ns, delivering about 1.4A to 1.7A
of peak current to a 1nF load with a V

of only 12V.

The LTC1693's rise and fall times are determined by the
peak current capabilities of P1 and N1. The predriver,
shown in Figure 1 driving P1 and N1, uses an adaptive
method to minimize cross-conduction currents. This is
done with a 6ns nonoverlapping transition time. N1 is fully
turned off before P1 is turned-on and vice-versa using this
6ns buffer time. This minimizes any cross-conduction
currents while N1 and P1 are switching on and off yet is
short enough to not prolong their rise and fall times.

LTC1693

Driver Electrical Isolation

The LTC1693-1 and LTC1693-2 incorporate two individual
drivers in a single package that can be separately connected
to GND and V

connections. Figure 2 shows a circuit with

an LTC1693-2, its top driver left floating while the bottom

driver is powered with respect to ground. Similarly Figure
3 shows a simplified circuit of a LTC1693-1 which is driv-
ing MOSFETs with different ground potentials. Because
there is 1G

of isolation between these drivers in a single

package, ground current on the secondary side will not
recirculate to the primary side of the circuit.

Power Dissipation

To ensure proper operation and long term reliability, the
LTC1693 must not operate beyond its maximum tempera-
ture rating. Package junction temperature can be calcu-
lated by:

= T

+ PD(

)

where:

= Junction Temperature

= Ambient Temperature

PD = Power Dissipation

= Junction-to-Ambient Thermal Resistance

Power dissipation consists of standby and switching
power losses:

PD = PSTDBY + PAC

where:

PSTDBY = Standby Power Losses

PAC = AC Switching Losses

The LTC1693 consumes very little current during standby.
This DC power loss per driver at V

= 12V is only

(360

A)(12V) = 4.32mW.

AC switching losses are made up of the output capacitive
load losses and the transition state losses. The capactive
load losses are primarily due to the large AC currents
needed to charge and discharge the load capacitance
during switching. Load losses for the CMOS driver driving
a pure capacitive load C

OUT

will be:

Load Capacitive Power (C

OUT

) = (C

OUT

)(f)(V

)

The power MOSFET's gate capacitance seen by the driver
output varies with its V

voltage level during switching.

A power MOSFET's capacitive load power dissipation can
be calculated by its gate charge factor, Q

. The Q

value

Figure 2. Simplified LTC1693-2 Floating Driver Application

Figure 3. Simplified LTC1693-1 Application
with Different Ground Potentials

OUT1

IN1

GND1

CC1

CC2

LTC1693-1

OTHER

PRIMARY-SIDE

CIRCUITS

OTHER

SECONDARY-SIDE

CIRCUITS

OUT2

IN2

GND2

1693 F03

APPLICATIO

S I

FOR

ATIO

OUT1

IN1

GND1

CC1

CC2

LTC1693-2

OUT2

IN2

GND2

1693 F02

LTC1693

corresponding to MOSFET's V

value (V

in this case)

can be readily obtained from the manafacturer's Q

curves:

Load Capacitive Power (MOS) = (V

)(Q

)(f)

Transition state power losses are due to both AC currents
required to charge and discharge the drivers' internal
nodal capacitances and cross-conduction currents in the
internal gates.

UVLO and Thermal Shutdown

The LTC1693's UVLO detector disables the input buffer
and pulls the output pin to ground if V

< 4V. The output

remains off from V

= 1V to V

= 4V. This ensures that

during start-up or improper supply voltage values, the
LTC1693 will keep the output power MOSFET off.

The LTC1693 also has a thermal detector that similarly
disables the input buffer and grounds the output pin if
junction temperature exceeds 145

C. The thermal shut-

down circuit has 20

C of hysteresis. This thermal limit

helps to shut down the system should a fault condition
occur.

Input Voltage Range

LTC1693's input pin is a high impedance node and essen-
tially draws neligible input current. This simplifies the
input drive circuitry required for the input.

The LTC1693 typically has 1.2V of hysteresis between its
low and high input thresholds. This increases the driver's
robustness against any ground bounce noises. However,
care should still be taken to keep this pin from any noise
pickup, especially in high frequency switching
applications.

In applications where the input signal swings below the
GND pin potential, the input pin voltage must be clamped
to prevent the LTC1693's parastic substrate diode from
turning on. This can be accomplished by connecting a
series current limiting resistor R1 and a shunting Schottky
diode D1 to the input pin (Figure 4). R1 ranges from 100

to 470

while D1 can be a BAT54 or 1N5818/9.

GND

LTC1693

INPUT SIGNAL

GOING BEL0W

GND PIN

POTENTIAL

PARASITIC

SUBSTRATE

DIODE

1693 F04

Bypassing and Grounding

LTC1693 requires proper V

bypassing and grounding due

to its high speed switching (ns) and large AC currents (A).
Careless component placement and PCB trace routing may
cause excessive ringing and under/overshoot.

To obtain the optimum performance from the LTC1693:

A. Mount the bypass capacitors as close as possible to the

and GND pins. The leads should be shortened as

much as possible to reduce lead inductance. It is
recommended to have a 0.1

F ceramic in parallel with

a low ESR 4.7

F bypass capacitor.

For high voltage switching in an inductive environment,
ensure that the bypass capacitors' V

MAX

ratings are

high enough to prevent breakdown. This is especially
important for floating driver applications.

B. Use a low inductance, low impedance ground plane to

reduce any ground drop and stray capacitance. Re-
member that the LTC1693 switches 1.5A peak currents
and any significant ground drop will degrade signal
integrity.

C. Plan the ground routing carefully. Know where the large

load switching current is coming from and going to.
Maintain separate ground return paths for the input pin
and output pin. Terminate these two ground traces only
at the GND pin of the driver (STAR network).

D. Keep the copper trace between the driver output pin and

the load short and wide.

Figure 4

APPLICATIO

S I

FOR

ATIO

LTC1693

TYPICAL APPLICATIO

TDRIVE

PWR V

PINV

BINH

SENSE

BDRIVE

PGND

OUT

SGND

SHDN

SENSE

LTC1266A

IN1

GND1

IN2

GND2

CC1

OUT1

CC2

OUT2

LTC1693-2

1nF

50V

C10

0.1

50V

C13

10nF

100V

C11

0.1

100V

C12

0.1

X7R

T1A

9.2

9T 4

#26

T1B

123

33T #30

T1C

33T #30

T1D

33T #30

T1E

NOT

USED

C12

1nF

0.1

25V

IN2

330

6.3V

+V1

GND

0.1

C11

120pF

NPO

43k

10k

2.49k

0.010

100

4.99k

70V

200mA

24V

240mA

GND

R10

32k

220

35V

MBR1100

100

12V

500mW

10k

46.4k

0.1%

24.3k

0.1%

100

IRL2505

MTD2N20

1/2W

IN1

330

6.3V

100pF

0.33

0.1

16V

10nF

50V

0.1

MMSD4148

··

120

63V

120

63V

T1: PHILIPS EFD25-3C85

FIRST WIND T1B, T1C AND T1D TRIFILAR

SECOND WIND T1A QUADFILAR

AIR GAP: 0.88mm OR 2

0.44mm SPACERS

100V

LT1006S8

220

35V

220

35V

MUR120

1693 TA03

24V

LT1006S8

1.2k

47.5k

SLIC Power Supply

LTC1693

TYPICAL APPLICATIO

SGND PGND

LBO

SHDN

LBI

BDRV

TDRV

0.015

C8
1500pF

C10
220pF

C7
390pF

C5
0.1

C6
10

16V

R7
1k

R8
30.1k

BINH

PINV

PWR V

1000pF

OUT

3.3V

SENSE

LTC1266

SENSE

R6
10

R5
2.2

R4
2.2

0.015

R3
100

R11
100k

Q5
2N3906

PANASONIC ETQPAF4R8HA
COILCRAFT DO3316P-102

3.3V

1693 TA03

R17

6.81k

2N3906

Q3
2N7002

R10
100k

R15
1.2k

C16
10

16V

R14
51

C15
0.1

U2A

LTC1693-2

Si4420

U2B

LTC1693-2

2N3904

R19
1k

R13
1.30k

R12
4.75k

R9
13k

R16

3.6k

MBRO530

D1
MBRS130

C17

100pF

R18

6.81k

C1
330

6.3V

C2
330

6.3V

MBRO530

C14
10

16V

C12
4700pF

C11
4700pF

L1*

4.8

C13
0.1

L2**

0.015

C3
330

6.3V

Negative-to-Positive Synchronous Boost Converter

LTC1693

TYPICAL APPLICATIO

TDRIVE

PWR V

PINV

BINH

SENSE

BDRIVE

PGND

OUT

SGND

SHDN

SENSE

LTC1266A

6.2V

500mW

220

16V

0.1

100V

FZT694B

MMSD4148

47k

IN1

GND1

IN2

GND2

CC1

OUT1

CC2

OUT2

LTC1693-1

WINDING

T1A

T1B

T1C

T1D

T1E

T1F

# TURNS

AWG

R11

12.1k

390

D10

1N4148

100pF

NPO

T1 WINDING ORDER:

T1A, T1B, T1C, T1D QUAD-FILAR, WOUND FIRST,

AFTER T1A, T1B, T1C AND T1D WOUND, REMOVE

2 TURNS FROM T1B AND 1 TURN FROM T1C

T1E WOUND ON TOP, SPREAD EVENLY

LAYER OF INSULATION

T1F WOUND ON TOP, SPREAD EVENLY

T1 CORE:

COILTRONICS VP4-TYPE, AIR GAP, 0.7mm or 2

0.35mm SPACERS

PRIMARY INDUCTANCE OF T1F = 50

ALTERNATIVE CORES:

SIEMENS EFD20, N67 MATERIAL, TDK PC40-EPC17

T1 TRANSFORMER

COILTRONICS VP4-TYPE

100

IRF620

1nF

0.1

25V

IN1

220

50V

IN2

220

50V

100pF

10nF

6.8k

C11

120pF

5% NPO

24V TO

35V

GND

T1A

#28

Si9803

2.2

MBRM140

BAV21

3.3V 500mW

2N5401

1nF

50V

T1B

#28

T1C

#28

O2A

330

6.3V

T1F

32T

#28

T1D

#28

T1E

#28

2.2

MBRM140

O3A

330

6.3V

220

25V

C11

0.1

100V

1693 TA04

5.6V

0.5W

1nF

2N2222

O1A

330

6.3V

O3B

330

6.3V

O2B

330

6.3V

42.2k

120

1/2W

0.1

4.7

O1B

330

6.3V

220pF

50V

O4B

0.1

16V

0.8A

3.3V

0.3A

2.5V

0.3A

30mA

Multiple Output Telecom Power Supply

LTC1693

TYPICAL APPLICATIO

CC2

OUT2

OUT1

GND1

CC1

IN2

IN1

GND2

LTC1693-1

CC2

OUT2

OUT1

GND1

GND2

IN2

CC1

IN1

LTC1693-1

COMP

RTOP

GND-F

GND-S

RMID

4.7k

470

BAT54

SUD30N04-10

IRF1310NS

1nF

SEC HV

4.8

PANASONIC ETQP AF4R8H

1nF

330

6.3V

330

6.3V

330

6.3V

4.7nF

0.1

4.7k

OUT

OUTPUT

5V/10A

C3, C4, C5:

SANYO OS-CON

FZT600

4.7

25V

0.47

50V

3.1V

MMFT3904

BAS21

SEC HV

LT1431CS8

REF

COLL

470

100k

3.01k

4.42k

9.31k

0.01

OUT

0.22

OUT

SHORT JP1

FOR 5V

OUT

BOOST

SENSE

12V

RUN/SHDN

PHASE

SYNC

REF

SL/ADJ

AVG

REF

SGND

PGND

LT1339

100k

13k

100k

2.4k

4.53k

0.1

2.2nF

0.1

4.7nF

20V

AVX

TSPE

3.9k

MMBD914LT1

3.3

CNY17-3

36k

BAS21

JP2

JP3

OUT

SHORT JP3, OPEN JP2

3.3V

OUT

, SHORT JP2, OPEN JP3

COILCRAFT

DO1608-105

10k

2.2

0.025

1/2W

470

FMMT718

IRF1310NS

MURS120

12V

2.2

MMBD914LT1

470

BAT54

1.2

100V

CER

1.2

100V

CER

W3, 10T 32AWG,

W4, 10T 32AWG

W5, 10T 2 x 26AWG

W4, 7T 6 x 26AWG

W1, 18T BIFILAR 31AWG

W3, 6T BIFILAR 31AWG

W1, 10T 2 x 26AWG

W1, 10T 32AWG,

W2, 15T 32AWG

2MIL

POLY

FILM

2MIL

POLY

FILM

OUTPUT CURRENT

0123456789

EFFICIENCY

36V

48V

72V

T1 PHILIPS EFD20-3F3 CORE

= 720

H (AI = 1800)

T2 ER11/5 CORE

AI = 960

1693 TA10

INPUT

36V TO

75V

48V to 5V Isolated Synchronous Forward DC/DC Converter

LTC1693

PACKAGE DESCRIPTIO

Dimensions in inches (millimeters) unless otherwise noted.

MS8 Package

8-Lead Plastic MSOP

(LTC DWG # 05-08-1660)

MSOP (MS8) 1197

* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,

PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

0.021

0.006

(0.53

0.015)

TYP

SEATING

PLANE

0.007

(0.18)

0.040

0.006

(1.02

0.15)

0.012

(0.30)

REF

0.006

0.004

(0.15

0.102)

0.034

0.004

(0.86

0.102)

0.0256

(0.65)

TYP

0.192

0.004

(4.88

0.10)

7 6

0.118

0.004*

(3.00

0.102)

0.118

0.004**

(3.00

0.102)

0.150 0.157**

(3.810 3.988)

0.189 0.197*

(4.801 5.004)

0.228 0.244

(5.791 6.197)

0.016 0.050
0.406 1.270

0.010 0.020

(0.254 0.508)

TYP

0.008 0.010

(0.203 0.254)

SO8 0996

0.053 0.069

(1.346 1.752)

0.014 0.019

(0.355 0.483)

0.004 0.010

(0.101 0.254)

0.050

(1.270)

TYP

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

S8 Package

8-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

LTC1693

LINEAR TECHNOLOGY CORPORATION 1999

1693fa LT/TP 1000 2K REV A · PRINTED IN USA

PART NUMBER

DESCRIPTION

COMMENTS

LTC1154

High Side Micropower MOSFET Drivers

Internal Charge Pump, 4.5V to 48V Supply Range, t

= 80

s, t

OFF

= 28

LTC1155

Dual Micropower High/Low Side Drivers with

4.5V to 18V Supply Range

Internal Charge Pump

LTC1156

Dual Micropower High/Low Side Drivers with

4.5V to 18V Supply Range

Internal Charge Pump

LTC1157

3.3V Dual Micropower High/Low Side Driver

3.3V or 5V Supply Range

1160/LT1162

Half/Full Bridge N-Channel Power MOSFET Driver

Dual Driver with Topside Floating Driver, 10V to 15V Supply Range

LT1161

Quad Protected High Side MOSFET Driver

8V to 48V Supply Range, t

= 200

s, t

OFF

= 28

LTC1163

Triple 1.8V to 6V High Side MOSFET Driver

1.8V to 6V Supply Range, t

= 95

s, t

OFF

= 45

LT1339

High Power Synchronous DC/DC Controller

Current Mode Operation Up to 60V, Dual N-Channel Synchronous Drive

LTC1435

High Efficiency, Low Noise Current Mode

3.5V to 36V Operation with Ultrahigh Efficiency, Dual N-Channel MOSFET

Step-Down DC/DC Controller

Synchronous Drive

RELATED PARTS

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900

FAX: (408) 434-0507

www.linear-tech.com

Isolated Push-Pull DC/DC Converter

OUTPUT CURRENT (A)

OUTPUT VOLTAGE (V)

0.1

0.5

0.7

1693 F05b

0.4

0.9 1.0

0.2 0.3

0.6

0.8

= 5V

OUTPUT CURRENT (A)

EFFICIENCY (%)

100

0.8

1693 F05c

0.2

0.4

0.6

1.0

0.7

0.1

0.3

0.5

0.9

= 5V

Output Voltage

Efficiency

TYPICAL APPLICATIO

74HC14

= 5V

C2
0.1

C1
390pF

0.1

6.2k

LTC1693-2

T1: PHILIPS CPHS-EFD20-1S-10P
FIRST WIND T1A AND T1C BIFILAR,
THEN WIND T1E AND T1F BIFILAR,
THEN WIND T1B AND T1D BIFILAR

1693 F05a

LTC1693-2

Q1
Si4410

R2
10

T1A

24T
#32

OUT

12V
1A

C5
2.2nF
100V

Q2
Si4410

= 5V

74HC74

PRESET

CLR

GND

C6
330

6.3V

C9
270

25V

MBR340

2.2nF

100V

2.2nF

100V

MBR340

T1D

24T
#32

T1B

24T
#32

T1E
24T
#28

T1F
24T
#28

T1C

24T
#32

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LTC1693-3

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LTC1693-3