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Электронный компонент: L4949D

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Device
Operating
Temperature Range
Package
L4949
SILICON MONOLITHIC
INTEGRATED CIRCUIT
MULTIFUNCTION
VERY LOW DROPOUT
VOLTAGE REGULATOR
ORDERING INFORMATION
L4949N
L4949D
TJ = 40
to +125
C
DIP8
SO8
D SUFFIX
PLASTIC PACKAGE
CASE 751
8
1
(Top View)
PIN CONNECTIONS
Order this document from L4949/D
N SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
1
2
3
4
8
7
6
5
VZ
CT
Gnd
S
i
V
CC
Reset
So
Vout
Advanced Information
Multifunction Very Low
Dropout Voltage Regulator
The L4949 is a monolithic integrated 5.0 V voltage regulator with a very
low dropout and additional functions such as poweron reset and input
voltage sense.
It is designed for supplying the microcomputer controlled systems
especially in automotive applications.
Operating DC Supply Voltage Range 5.0 V to 28 V
Transient Supply Voltage Up to 40 V
Extremely Low Quiescent Current in Standby Mode
High Precision Standby Output Voltage 5.0 V
1%
Output Current Capability Up to 100 mA
Very Low Dropout Voltage Less Than 0.4 V
Reset Circuit Sensing The Output Voltage
Programmable Reset Pulse Delay With External Capacitor
Voltage Sense Comparator
Thermal Shutdown and Short Circuit Protections
Regulator
1.23 Vref
2.0 V
2.0
A
Reset
1.23 V
Sense
Gnd
Sense
Output
(So)
Reset
Sense
Input
(Si)
Supply
Voltage (VCC)
VZ
Output
Voltage (Vout)
CT
3
8
4
6
7
5
2
1
Vs
+
+
Preregulator
6.0 V
Representative Block Diagram
Motorola, Inc. 1997
Rev 0
This document contains information on a new product. Specifications
and information herein are subject to change without notice.
L4949
2
MOTOROLA ANALOG IC DEVICE DATA
ABSOLUTE MAXIMUM RATINGS
(Absolute Maximum Ratings indicate limits beyond
which damage to the device may occur.)
Rating
Symbol
Value
Unit
DC Operating Supply Voltage
VCC
28
V
Transient Supply Voltage (t < 1.0 s)
VCC TR
40
V
Output Current
Iout
Internally
Limited
Output Voltage
Vout
20
V
Sense Input Current
ISI
1.0
mA
Sense Input Voltage
VSI
VCC
Output Voltages
V
Reset Output
VReset
20
Sense Output
VSO
20
Output Currents
mA
Reset Output
IReset
5.0
Sense Output
ISO
5.0
Preregulator Output Voltage
VZ
7.0
V
Preregulator Output Current
IZ
5.0
mA
ESD Protection at any pin
V
Human Body Model
2000
Machine Model
400
Thermal Resistance, JunctiontoAir
R
JA
C/W
P Suffix, DIP8 Plastic Package, Case 626
100
D Suffix, SO8 Plastic Package, Case 751
200
Maximim Junction Temperature
TJ
150
C
Storage Temperature Range
Tstg
65 to +150
C
NOTE:
ESD data available upon request.
ELECTRICAL CHARACTERISTICS
(VCC = 14 V, 40
C < TJ < 125
C, unless otherwise specified.)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = 25
C, Iout = 1.0 mA)
Vout
4.95
5.0
5.05
V
Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < Iout < 50 mA)
Vout
4.9
5.0
5.1
V
Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < Iout < 50 mA)
Vout
4.9
5.0
5.1
V
Dropout Voltage
Vdrop
V
Iout = 10 mA
0.1
0.25
Iout = 50 mA
0.2
0.40
Iout = 100 mA
0.3
0.50
Input to Output Voltage Difference in Undervoltage Condition
VIO
0.2
0.4
V
(VCC = 4.0 V, Iout = 35 mA)
Line Regulation (6.0 V < VCC < 28 V, Iout = 1.0 mA)
Regline
1.0
20
mV
Load Regulation (1.0 mA < Iout < 100 mA)
Regload
8.0
30
mV
Current Limit
ILim
mA
Vout = 4.5 V
105
200
400
Vout = 0 V
100
Quiescent Current (Iout = 0.3 mA, TJ < 100
C)
IQSE
150
260
A
Quiescent Current (Iout = 100 mA)
IQ
5.0
mA
L4949
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS
(continued) (VCC = 14 V, 40
C < TJ < 125
C, unless otherwise specified.)
Characteristic
Unit
Max
Typ
Min
Symbol
RESET
Reset Threshold Voltage
VResth
Vout 0.5
V
Reset Threshold Hysteresis
VResth,hys
mV
@ TJ = 25
C
50
100
200
@ TJ = 40 to +125
C
50
300
Reset Pulse Delay (CT = 100 nF, tR
100
s)
tResD
55
100
180
ms
Reset Reaction Time (CT = 100 nF)
tResR
5.0
30
s
Reset Output Low Voltage (RReset = 10 k
to Vout, VCC
3.0 V)
VResL
0.4
V
Reset Output High Leakage Current (VReset = 5.0 V)
IResH
1.0
A
Delay Comparator Threshold
VCTth
2.0
V
Delay Comparator Threshold Hysteresis
VCTth, hys
100
mV
SENSE
Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V)
VSOth
1.16
1.23
1.35
V
Sense Threshold Hysteresis
VSOth,hys
20
100
200
mV
Sense Output Low Voltage
VSOL
0.4
V
(VSI
1.16 V, VCC
3.0 V, RSO = 10 k
to Vout)
Sense Output Leakage (VSO = 5.0 V, VSI
1.5 V)
ISOH
1.0
A
Sense Input Current
ISI
1.0
0.1
1.0
A
PREREGULATOR
Preregulator Output Voltage (IZ = 10
A)
VZ
6.3
V
PIN FUNCTION DESCRIPTION
Pin
Symbol
Description
1
VCC
Supply Voltage
2
Si
Input of Sense Comparator
3
VZ
Output of Preregulator
4
CT
Reset Delay Capacitor
5
Gnd
Ground
6
Reset
Output of Reset Comparator
7
SO
Output of Sense Comparator
8
Vout
Main Regulator Output
4.96
4.98
5.0
5.02
5.04
40
20
0
40
60
20
100
120
TJ, JUNCTION TEMPERATURE (
C)
80
VCC = 14 V
Iout = 1.0 mA
V
out
, OUTPUT
VOL
T
AGE
(V)
0
2.0
3.0
4.0
6.0
0
10
VCC, SUPPLY VOLTAGE (V)
1.0
1.0
TJ = 25
C
RL = 100
RL = 5.0 k
5.0
V
out
, OUTPUT
VOL
T
AGE
(V)
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
Figure 1. Output Voltage versus
Junction Temperature
Figure 2. Output Voltage versus
Supply Voltage
TYPICAL CHARACTERIZATION CURVES
L4949
4
MOTOROLA ANALOG IC DEVICE DATA
0
100
150
200
250
0.1
100
Iout, OUTPUT CURRENT (mA)
10
1.0
50
TJ = 25
C
V
drop
, DROPOUT

VOL
T
AGE (mV)
0
0.10
0.20
0.30
0.40
40
20
0
40
60
20
100
120
TJ, JUNCTION TEMPERATURE (
C)
80
V
drop
, DROPOUT

VOL
T
AGE (mV)
Iout = 50 mA
Iout = 10 mA
Iout = 100 mA
3.0
2.5
2.0
1.5
1.0
0.1
1.0
10
100
0.5
0
VCC = 14 V
TJ = 25
C
Iout, OUTPUT CURRENT (mA)
I Q
, QUIESCENT
CURRENT
(mA)
3.0
2.5
2.0
1.5
1.0
0
5.0
10
15
20
25
30
VCC, SUPPLY VOLTAGE (V)
0.5
0
RL = 5.0 k
RL = 100
TJ = 25
C
I Q
, QUIESCENT
CURRENT
(mA)
Figure 3. Dropout Voltage versus
Output Current
Figure 4. Dropout Voltage versus
Junction Temperature
Figure 5. Quiescent Current versus
Output Current
Figure 6. Quiescent Current versus
Supply Voltage
TYPICAL CHARACTERIZATION CURVES
(continued)
6.0
5.0
4.0
3.0
2.0
4.0
4.1
Vout, OUTPUT VOLTAGE (V)
1.0
0
Resistor 10 k
from Reset Output
to 5.0 V
TJ = 25
C
V
Reset
, RESET
OUTPUT
(V)
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
4.7
4.66
4.62
4.58
4.5
40
20
TJ, JUNCTION TEMPERATURE (
C)
4.46
4.42
Upper Threshold
V
Reset
, RESET

THRESHOLD
VOL
T
AGE (V)
0
20
40
60
80
100
120
4.54
Lower Threshold
Figure 7. Reset Output versus
Regulator Output Voltage
Figure 8. Reset Thresholds versus
Junction Temperature
L4949
5
MOTOROLA ANALOG IC DEVICE DATA
6.0
5.0
4.0
2.0
1.0
1.15
VSI, SENSE INPUT VOLTAGE (V)
1.0
0
TJ = 25
C
V
SO
, SENSE OUTPUT
VOL
T
AGE (V)
1.2
1.25
1.3
1.35
1.4
1.45
1.5
3.0
Resistor 10 k
from Sense Output
to 5.0 V
1.1
1.05
1.4
1.38
1.36
1.34
1.3
40
20
TJ, JUNCTION TEMPERATURE (
C)
1.28
1.2
Upper Threshold
V
SI
, SENSE INPUT

VOL
T
AGE (V)
0
20
40
60
80
100
120
1.32
Lower Threshold
1.26
1.24
1.22
Figure 9. Sense Output versus
Sense Input Voltage
Figure 10. Sense Thresholds versus
Junction Temperature
TYPICAL CHARACTERIZATION CURVES
(continued)
APPLICATION INFORMATION
Supply Voltage Transient
High supply voltage transients can cause a reset output
signal perturbation. For supply voltages greater than 8.0 V
the circuit shows a high immunity of the reset output against
supply transients of more than 100 V/
s. For supply voltages
less than 8.0 V supply transients of more than 0.4 V/
s can
cause a reset signal perturbation. To improve the transient
behavior for supply voltages less than 8.0 V a capacitor at Pin
3 can be used. A capacitor at Pin 3 (C3
1.0
F) reduces
also the output noise.
S
o
VZ
(optional)
Vout
Vout
Vbat
C
s
CO
C3
RSO 10 k
Regulator
1.23 Vref
2.0 V
2.0
A
Reset
1.23 V
Sense
Gnd
Reset
Si
VCC
CT
3
8
4
6
7
5
2
1
VCC
+
+
Preregulator
6.0 V
10 k
Figure 11. Application Schematic
NOTES: 1. For stability: Cs
1.0
F, CO
4.7
F, ESR < 10
at 10 kHz
2. Recommended for application: Cs = CO = 10
F
L4949
6
MOTOROLA ANALOG IC DEVICE DATA
OPERATING DESCRIPTION
The L4949 is a monolithic integrated low dropout voltage
regulator. Several outstanding features and auxiliary
functions are implemented to meet the requirements of
supplying microprocessor systems in automotive
applications. Nevertheless, it is suitable also in other
applications where the present functions are required. The
modular approach of this device allows the use of other
features and functions independently when required.
Voltage Regulator
The voltage regulator uses an isolated Collector Vertical
PNP transistor as a regulating element. With this structure,
very low dropout voltage at currents up to 100 mA is
obtained. The dropout operation of the standby regulator is
maintained down to 3.0 V input supply voltage. The output
voltage is regulated up to the transient input supply voltage of
35 V. With this feature no functional interruption due to
overvoltage pulses is generated.
The typical curve showing the standby output voltage as a
function of the input supply voltage is shown in Figure 13.
The current consumption of the device (quiescent current)
is less than 200
A.
To reduce the quiescent current peak in the undervoltage
region and to improve the transient response in this region,
the dropout voltage is controlled. The quiescent current as a
function of the supply input voltage is shown in Figure 14.
Short Circuit Protection:
The maximum output current is internally limited. In case
of short circuit, the output current is foldback current limited
as described in Figure 12.
0
5.0
20
100
200
Iout (mA)
Figure 12. Foldback Characteristic of Vout
V
out
(V)
10
Vout
5.0 V
35 V
5.0 V
2.0 V
0 V
Vout
VCC
Figure 13. Output Voltage versus Supply Voltage
3.0
Figure 14. Quiescent Current versus Supply Voltage
2.5
2.0
1.5
1.0
0
5.0
10
15
20
25
30
VCC, SUPPLY VOLTAGE (V)
0.5
0
RL = 5.0 k
RL = 100
TJ = 25
C
I Q
, QUIESCENT
CURRENT
(mA)
Preregulator
To improve the transient immunity a preregulator stabilizes
the internal supply voltage to 6.0 V. This internal voltage is
present at Pin 3 (VZ). This voltage should not be used as an
output because the output capability is very small (
100
A).
This output may be used as an option when better
transient behavior for supply voltages less than 8.0 V is
required. In this case a capacitor (100 nF 1.0
F) must be
connected between Pin 3 and Gnd. If this feature is not used
Pin 3 must be left open.
L4949
7
MOTOROLA ANALOG IC DEVICE DATA
Reset Circuit
The block circuit diagram of the reset circuit is shown in
Figure 15.
The reset circuit supervises the output voltage. The reset
thereshold of 4.5 V is defined with the internal reference
voltage and standby output drivider.
The reset pulse delay time tRD, is defined with the charge
time of an external capacitor CT:
t
RD
+
C
T
x 2.0 V
2.0
m
A
The reaction time of the reset circuit originates from the
discharge time limitation of the reset capacitor CT and is
proportional to the value of CT. The reaction time of the reset
circuit increases the noise immunity.
1.23 V Vref
22 k
Out
Reg
2.0
A
CT
2.0 V
+
Reset
Figure 15. Reset Circuit
Standby output voltage drops below the reset threshold
only a bit longer than the reaction time results in a shorter
reset delay time.
The nominal reset delay time will be generated for standby
output voltage drops longer than approximately 50
s. The
typical reset output waveforms are shown in Figure 16.
VRT + 0.1 V
5.0 V
UKT
Vout
3.0 V
Reset
Vout1
Vin
40 V
t
tR
tRD
tRD
tRR
Switch On
Input Drop
Dump
Output
Overload
Switch Off
Figure 16. Typical Reset Output Waveforms
Sense Comparator
The sense comparator compares an input signal with an
internal voltage reference of typical 1.23 V. The use of an
external voltage divider makes this comparator very flexible
in the application.
It can be used to supervise the input voltage either before
or after the protection diode and to give additional information
to the microprocessor like low voltage warnings.
L4949
8
MOTOROLA ANALOG IC DEVICE DATA
N SUFFIX
PLASTIC PACKAGE
CASE 62605
ISSUE K
D SUFFIX
PLASTIC PACKAGE
CASE 75105
ISSUE S
OUTLINE DIMENSIONS
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
STYLE 1:
PIN 1. AC IN
2. DC + IN
3. DC IN
4. AC IN
5. GROUND
6. OUTPUT
7. AUXILIARY
8. VCC
1
4
5
8
F
NOTE 2
A
B
T
SEATING
PLANE
H
J
G
D
K
N
C
L
M
M
A
M
0.13 (0.005)
B
M
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
9.40
10.16
0.370
0.400
B
6.10
6.60
0.240
0.260
C
3.94
4.45
0.155
0.175
D
0.38
0.51
0.015
0.020
F
1.02
1.78
0.040
0.070
G
2.54 BSC
0.100 BSC
H
0.76
1.27
0.030
0.050
J
0.20
0.30
0.008
0.012
K
2.92
3.43
0.115
0.135
L
7.62 BSC
0.300 BSC
M
10
10
N
0.76
1.01
0.030
0.040
_
_
SEATING
PLANE
1
4
5
8
A
0.25
M
C B
S
S
0.25
M
B
M
h
q
C
X 45
_
L
DIM
MIN
MAX
MILLIMETERS
A
1.35
1.75
A1
0.10
0.25
B
0.35
0.49
C
0.18
0.25
D
4.80
5.00
E
1.27 BSC
e
3.80
4.00
H
5.80
6.20
h
0
7
L
0.40
1.25
q
0.25
0.50
_
_
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETERS.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
D
E
H
A
B
e
B
A1
C
A
0.10
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals"
must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
Mfax is a trademark of Motorola, Inc.
How to reach us:
USA / EUROPE / Locations Not Listed
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P.O. Box 5405, Denver, Colorado 80217. 3036752140 or 18004412447
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L4949/D