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PDF L4936EH Data sheet ( Hoja de datos )

Número de pieza L4936EH
Descripción ADVANCED VOLTAGE REGULATOR
Fabricantes STMicroelectronics 
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No Preview Available ! L4936EH Hoja de datos, Descripción, Manual

® L4936E
ADVANCED VOLTAGE REGULATOR
ENABLE AND SENSE INPUTS (EN, SI) PRO-
TECTED AGAINST NEGATIVE TRANSIENTS
DOWN TO -5V
RESET THRESHOLD ADJUSTABLE FROM
3.8 TO 4.7V
EXTREMELY LOW QUIESCENT CURRENT,
65µA (LESS THAN 90µA) IN STANDBY
MODE
OPERATING DC SUPPLY VOLTAGE RANGE
5V - 28V
OPERATING TRANSIENT SUPPLY VOLT-
AGE UP TO 40V
HIGH PRECISION STANDBY OUTPUT VOLT-
AGE 5V ± 1% WITH 100mA CURRENT CA-
PABILITY
OUTPUT 2 VOLTAGE 5V ± 2% WITH 400mA
CURRENT CAPABILITY (ADJ WIRED TO
VOUT2)
OUTPUT 2 VOLTAGE ADJUSTABLE BY EX-
TERNAL VOLTAGE DIVIDER
OUTPUT 2 DISABLE FUNCTION FOR
STANDBY MODE
PIN CONNECTIONS (Top views)
MULTIWATT 11
MULTIWATT 15
ORDERING NUMBERS: L4936E (Multiwatt 11)
L4936EH (Multiwatt 15)
DESCRIPTION
The L4936E is a monolithic integrated dual volt-
age regulator with two very low dropout outputs
and additional functions as power-on reset and in-
put voltage sense. It is designed for supplying the
microcomputer controlled systems especially in
automotive applications.
TAB CONNECTED TO PIN 6
11
10
9
8
7
6
5
4
3
2
1
OUT2
ADJ
OUT1
SO
RES
GND
EN
CT
PR
SI
VS1/VS2
D94AT077
June 2000
Multiwatt11
TAB CONNECTED TO PIN 6
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Multiwatt15
OUT2
ADJ
OUT1
SO
N.C.
N.C.
RES
GND
EN
N.C.
CT
PR
SI
VS1
VS2
D94AT078A
1/11

1 page




L4936EH pdf
APPLICATION CIRCUIT
L4936E
(Note 8)
100K
15V
for example
BZX97C15
VS1
CS
VS2
EN
1.23V
REG1
REG2
PR
RESET
SI
1.23V
SENSE
1.23V
REFERENCE
1.23V
1.4V
OUT1
CO1
OUT2
ADJ
CO2
CT (Note 7)
CT
RES
SO
VOUT1
RSO
GND
D94AT079A
FUNCTIONAL DESCRIPTION
The L4936E is a monolithic integrated dual volt-
age regulator, based on the STM modulator volt-
age regulator approach. Several outstanding fea-
tures and auxiliary functions are implemented to
meet the requirements of supplying microproces-
sor systems in automotive applications. Neverthe-
less, it is suitable also in other applications where
two stabilized voltages are required. The modular
approach of this device allows to get easly also
other features and functions when required.
Standby Regulator
The standby regulator uses an Isolated collector
Vertical PNP transistor as a regulating element.
With this structure very low dropout voltage at
currents up to 100mA is obtained. The dropout
operation of the standby regulator is maintained
down to 3V input supply voltage. The output volt-
age is regulated up to the transient input supply
voltage of 40V. With this feature no functional in-
terruption due to overvoltage pulses is generated.
In the standby mode when the output 2 is dis-
abled, the current consumption of the device (qui-
escent current) is less than 90µA (14V supply
voltage).
To reduce the quiescent current peak in the un-
dervoltage region and to improve the transient re-
sponse in this region, the dropout voltage is con-
trolled. A second regulation path will keep the
output voltage without load below 5.5V even at
high temperatures.
Output 2 Voltage
The output 2 regulator uses the same output
structure as the standby regulator but rated for
the output current of 400mA. The output voltage
is internally fixed to 5V if ADJ is connected to
VOUT2.
-
+
1.23V
R1i
RADJ
R2i
total 100K
typical
OUT2
ADJ
R1E
R2E
D94AT080
5/11

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L4936EH arduino
L4936E
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. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2000 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco -
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
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