L4949 STMicroelectronics, L4949 Datasheet

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L4949

Manufacturer Part Number
L4949
Description
Manufacturer
STMicroelectronics
Datasheet

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June 2000
BLOCK DIAGRAM
OPERATING DC SUPPLY VOLTAGE RANGE
5V - 28V
TRANSIENT SUPPLY VOLTAGE UP TO 40V
EXTREMELY LOW QUIESCENT CURRENT
IN STANDBY MODE
HIGH PRECISION STANDBY OUTPUT VOLT-
AGE 5V 1%
OUTPUT CURRENT CAPABILITY UP TO
100mA
VERY LOW DROPOUT VOLTAGE LESS
THAN 0.5V
RESET CIRCUIT SENSING THE OUTPUT
VOLTAGE
PROGRAMMABLE RESET PULSE DELAY
WITH EXTERNAL CAPACITOR
VOLTAGE SENSE COMPARATOR
THERMAL SHUTDOWN AND SHORT CIR-
CUIT PROTECTIONS
V
SI
S
®
REG
REF
PREREGULATOR 5V
1.23V
V
Z
MULTIFUNCTION VERY LOW DROP
V
RESET
OUT
V
S
DESCRIPTION
The L4949E is a monolithic integrated 5V voltage
regulator with a very low dropout output and addi-
tional functions as power-on reset and input volt-
age sense. It is designed for supplying the micro-
computer
automotive applications.
+
SENSE
Minidip
2
ORDERING NUMBERS: L4949E (Minidip)
VOLTAGE REGULATOR
CT
controlled
1.23V
D96AT219
2V
SO8
systems
L4949EP (SO20W)
L4949ED (SO8)
SO20W (12+4+4)
L4949E
especially
RES
SO
GND
1/10
in

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L4949 Summary of contents

Page 1

... MULTIFUNCTION VERY LOW DROP VOLTAGE REGULATOR Minidip ORDERING NUMBERS: L4949E (Minidip) DESCRIPTION The L4949E is a monolithic integrated 5V voltage regulator with a very low dropout output and addi- tional functions as power-on reset and input volt- age sense designed for supplying the micro- computer automotive applications ...

Page 2

... L4949E ABSOLUTE MAXIMUM RATINGS Symbol V DC Operating Supply Voltage SDC V Transient Supply Voltage (T < 1s) STR Output Current Output Voltage Output Voltage RES Output Current RES SO V Preregulator Output Voltage Z I Preregulator Output Current Z T Junction Temperature J T Storage Temperature Range ...

Page 3

... 100mA 100nF; T 100 10K 1.5V RES RES V 1.16V 10K 5V L4949E Min. Typ. Max. Unit 4.95 5 5.05 V 4.90 5 5.10 V 4.75 5.25 V 0.1 0.25 V 0.2 0.4 V 0.3 0 105 200 400 mA 120 ...

Page 4

... A capacitor at pin 3 ( reduces also the output noise. FUNCTIONAL DESCRIPTION The L4949E is a monolithic integrated voltage regulator, based on the STM modular voltage regulator approch. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems in automotive applications. Nevertheless suitable also in other applications where the present functions are required ...

Page 5

... 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 informations to the microprocessor like low voltage warnings. L4949E ). This volt defined with the RD : ...

Page 6

... L4949E Figure 4 Figure 5 6/10 ...

Page 7

... DIM. MIN. TYP. MAX. MIN. A 3.32 a1 0.51 0.020 B 1.15 1.65 0.045 b 0.356 0.55 0.014 b1 0.204 0.304 0.008 D 10.92 E 7.95 9.75 0.313 e 2.54 e3 7.62 e4 7.62 F 6.6 I 5.08 L 3.18 3.81 0.125 Z 1.52 inch MECHANICAL DATA TYP. MAX. 0.131 0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0.260 0.200 0.150 0.060 L4949E OUTLINE AND Minidip 7/10 ...

Page 8

... L4949E mm DIM. MIN. TYP. MAX. A 1.75 a1 0.1 0.25 0.004 a2 1.65 a3 0.65 0.85 0.026 b 0.35 0.48 0.014 b1 0.19 0.25 0.007 C 0.25 0.5 0.010 c1 45 (typ.) D (1) 4.8 5.0 0.189 E 5.8 6.2 0.228 e 1.27 e3 3.81 F (1) 3.8 4.0 L 0.4 1.27 0.016 M 0 (max.) (1) D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). 8/10 inch MIN. TYP. ...

Page 9

... D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max inch MECHANICAL DATA TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.050 0.419 0.030 0.050 L4949E OUTLINE AND SO20 h x 45˚ SO20MEC 9/10 ...

Page 10

... L4949E Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...

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