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Электронный компонент: FAN1540

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www.fairchildsemi.com
REV. 1.0.8 3/22/04
Features
Very Low Ground Current (I
GND
= 1mA)
Excellent Line Regulation
Excellent Load Regulation
Very Low Transient Overshoot
Stable with low ESR Output Capacitor (ESR = 0m
)
Thermal Shutdown
Current Limit
Output Options: 3.3V and 1.8V
Applications
Disk Drive Circuits
Desktop Computers
Laptop, Notebook Computers
General purpose Three Terminal Regulator
Description
The FAN1539/FAN1540 series of high current LDO (1.0A
and 1.3A) has been developed for portable applications
where low quiescent current is an important requirement.
The device features excellent line and load transient response
which does not exceed 10% of nominal output value for full
operating temperature range even during power ON cycle
and short circuit removal. Internally trimmed, temperature
compensated bandgap reference guarantees 2.5% accuracy
for full range of input voltage, output current and tempera-
ture. Included on the chip are accurate current limit and ther-
mal shutdown protection. Device stability is achieved with
only two external low ESR ceramic capacitors.
The FAN1539/FAN1540 is available in thermally enhanced
3x3mm 6-lead MLP, 5x6mm 8-lead MLP package and
3-lead TO-252 packages. The 5x6mm MLP package version
features separate Kelvin sense pin for high precision applica-
tions.
FAN1539/FAN1540
1A/1.3A, LDO With Low Quiescent Current
Block Diagram
Notes:
1. No connection for FAN1540MMPX.
2. V
SEN
available for FAN1540MMPX.
CURRRENT
LIMIT
THERMAL
SHUTDOWN
BANDGAP
REFERENCE
V
IN
V
OUT
V
SENSE
GND
SRART-UP
CIRCUIT
ERROR
AMPLIFIER
X
(Note1)
(Note2)
FAN1539/FAN1540
PRODUCT SPECIFICATION
2
REV. 1.0.8 3/22/04
Pin Assignments
Pin Description
Symbol
Name And Function
V
IN
Input pin
GND
Ground Pin (Tab)
V
OUT
Output pin: Fixed Output Voltage
V
SEN
Output sense pin. Connect to V
OUT
if Kelvin sensing is not required
NC
No Connection
TOP VIEW
VIN
GND
3-Lead TO-252 PACKAGE
VOUT
FAN1540
5x6mm 8-Lead MLP
1
2
3
4
5
6
7
8
FAN1540
FAN1539/FAN1540
GND
VOUT
VSEN
VIN
GND
GND
GND
GND
VIN
NC
GND
NC
NC
VOUT
1
2
3
6
5
4
3x3mm 6-Lead MLP
PRODUCT SPECIFICATION
FAN1539/FAN1540
REV. 1.0.8 3/22/04
3
Absolute Maximum Ratings
Notes:
3. Junction to ambient thermal resistance,
JA,
is a strong function of PCB material, board thickness, thickness and number of
copper plains, number of via used, diameter of via used, available copper surface, and attached heat sink
characteristics.Thermal resistance(
), V
IN
, I
OUT
must be chosen not to exceed T
J
= 150
C.
4. Soldering temperature should be 260
C for 10 second after 240
C for 30 second in I.R. reflow using 60/40 solder. Maximum
rate of temperature rise is 3
C/SEC to within 100
C of the final temperature.
5. Using Mil Std. 883E, method 3015.7(Human Body Model) and EIA/JESD22C101-A (Charge Device Model).
Parameter
Symbol
Value
Units
Operating Input Voltage
V
IN
10
V
Power Dissipation
P
D
Internally
Limited
W
Short Circuit Output Current
I
OSH
Internally
Limited
A
Operating Junction Temperature Range
T
J
0 to 150
C
Thermal Resistance- Junction to Tab, TO-252
JC
3
C/W
Thermal Resistance- Junction to Tab, 3mmx3mm 6-lead MLP (Note 3)
JC
8
C/W
Thermal Resistance- Junction to Tab, 5mmx6mm 8-lead MLP (Note 3)
JC
4
C/W
Storage Temperature Range (Note 3)
T
STG
-65 to 150
C
Lead Temperature (I.R. Reflow) 30Sec.
(Note 4)
T
LEAD
240
C
Lead Temperature (Soldering) 10Sec.
(Note 4)
T
LEAD
260
C
Electrostatic Discharge Protection (Note 5)
HBM
ESD
4
kV
CDM
2


JA
FAN1539/FAN1540
PRODUCT SPECIFICATION
4
REV. 1.0.8 3/22/04
Electrical Characteristics
--FAN1539MPX, FAN1540MPX, FAN1540MMPX,
FAN1540DX
Unless otherwise specified, V
IN
= 4.50V to 7V, T
j
= 25C, I
MAX
(FAN1539) = 1.0A, I
MAX
(FAN1540) = 1.3A. Boldface
limits apply over operating junction temperature range of 0
TEST CONDITIONS
TEST LIMITS
Parameter
Symbol
V
IN
I
OUT
Min.
Typ.
Max.
Units
Output Voltage
FAN1540
V
OUT
3.234 3.300 3.366
V
3.217
3.383
Line Regulation
REG
(LINE)
2
15
mV
Load Regulation REG
(LOAD)
4.75V
FAN1539
25
35
mV
FAN1540
30
40
Dropout Voltage
(Note 6)
V
D
I
OUT
=
I
MAX
0.9
1.2
V
Current Limit
I
S
5.5V
3.3
A
Min. Output
Current for
regulation
I
OMIN
0
mA
Temperature
Stability
T
S
I
OUT
=
5mA
0.3
%
RMS Output
Noise
(Note 7)
V
N
I
OUT
=
I
MAX
0.003
%V
OUT
Ripple Rejection
Ratio (Note 8)
R
A
5V
I
OUT
=
10mA
65
75
dB
I
OUT
=
100mA
63
73
I
OUT
=
I
MAX
45
57
Transient
Response
Change of V
OUT
with step load
change (Note 9)
5V
1mA to I
MAX
2.0
10
(un-
der-
shoot
or
over-
shoot
of
V
OUT
)
%
I
MAX
to 1mA
Transient
Response
Change of V
OUT
with application
of V
IN
(Note 9)
0 to 5V Step Input
10% to 90%
5.0
10
(un-
der-
shoot
or
over-
shoot
of
V
OUT
)
%
C
T
J
125
C.
4.75V
V
IN
5.25V
5mA
I
OUT
I
MAX
3.0V
V
IN
5.25V
5mA
I
OUT
I
MAX
5mA
I
OUT
I
MAX
V
O
UT
3
%
(
)
V
OUT
I
OUT
-----------------
t
r
1
S
t
f
1
S
V
OUT
V
IN
-----------------
t
r
1
S
1mA
I
OUT
I
MAX
PRODUCT SPECIFICATION
FAN1539/FAN1540
REV. 1.0.8 3/22/04
5
Electrical Characteristics
--FAN1539MPX, FAN1540MPX, FAN1540MMPX,
FAN1540DX
(Continued)
Notes:
6. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 1% below the nominal
value measured at
V
IN
= 5V.
7. Measured within 10Hz to 10kHz bandwidth.
8. Measured at DC, specified at 120 Hz.
9. C
IN
= 22F, C
OUT
= 10F. Both capacitors are low ESR X7R type.
Test Circuit
Unless otherwise specified, V
IN
= 4.50V to 7V, T
j
= 25C, I
MAX
(FAN1539) = 1.0A, I
MAX
(FAN1540) = 1.3A. Boldface
limits apply over operating junction temperature range of 0
TEST CONDITIONS
TEST LIMITS
Parameter
Symbol
V
IN
I
OUT
Min.
Typ.
Max.
Units
Transient
Response
Short circuit
Removal
Response
(Note 9)
@I
OUT
= short
5V
I
OUT
= short
to
I
OUT
= 10mA
5.0
10
(over-
shoot
or un-
der-
shoot
of V
O
)
%
Quiescent
Current
I
GND
I
OUT
= 0mA
1.0
2.0
mA
Quiescent
Current
I
GND
1.0
2.0
mA
Quiescent
Current
I
GND
V
IN
= 5V
1.0
2.0
mA
Thermal
Shutdown
T
jSD
160
C
Thermal
Hysteresis
T
HYST
15
C
C
T
J
125
C.
V
OUT
V
IN
-----------------
V
IN
7V
V
IN
7V
2mA
I
OUT
I
MAX
0mA
I
OUT
50mA
3.0V
V
IN
5.25V
3.0
V
IN
5.25V
DUT
GND
C
IN
V
IN
V
OUT
C
OUT
Notes: 1. Use low ESR capacitors.
2. C
IN
should be placed as close to V
IN
as possible.
IN
OUT
22
F
10
F