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L4938N, L4938ND, L4938ND/ED

Table of contents:
Info of L4938N
Info of L4938ND
Info of L4938ND/ED

L4938N, L4938ND, L4938ND/ED Selling Leads, Datasheet

MFG:STMicroelectronics Category:Integrated Circuits (ICs) Package Cooled:DIP D/C:dc00

L4938N, L4938ND, L4938ND/ED Datasheet download

Five Points

Part Number: L4938ND

Category: Integrated Circuits (ICs)

MFG: STMicroelectronics

Package Cooled: DIP

D/C: dc00

Description: IC VREG MULTIFUNCT DUAL SO-20

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L4938N General Description

The L4938Nis a monolithic integrateddual voltage regulatorswith twoverylowdropoutoutputsandadditional functions such as power-on reset and input voltagesense. They are designedfor supplyingmicrocomputer controlled systems specially in automotive applications.

L4938N Maximum Ratings

Symbol	Parameter	Value	Unit
V_S	DC Supply Voltage	28	V
	Transient Supply Voltage (T < 1s)	40	V
T_j,T_stg	Junction and Storage Temperature Range	-55to150	°C
I_SI	Sense Input Current (V_SI0.3V or V_SI>V_S)	±1	mA
I_EN	Enable Input Current (V_EN0.3V)	±1	mA
V_EN	Enable Input Voltage	V_S
V_RES,V_SO	Reset and Sense Output Voltage	20	V
I_RES,I_SO	Reset and Sense Output Current	5	mA
P_D	Power Dissipation	75	mW

Note : The circuit is ESD protected according to MILSTD883C

L4938N Features

·STANDBYOUTPUTVOLTAGEPRECISION5V ± 2%
·OUTPUT2TRACKEDTOTHESTANDBYOUT PUT
·OUTPUT 2 DISABLE FUNCTION FOR STANDBYMODE
·VERY LOW QUIESCENT CURRENT, LESS
·THAN 250mA, IN STANDBYMODE
·OUTPUT 2 VOLTAGESETTABLE FROM5 TO20V
·OUTPUTCURRENTS : I₀₁ = 50mA, I₀₂ = 500mA .VERY LOWDROPOUT (max 0.4V/0.6V)
·OPERATINGTRANSIENT SUPPLY VOLTAGE UP TO 40V
·POWER-ON RESET CIRCUIT SENSING THE STANDBYOUTPUT VOLTAGE
·POWER-ON RESET DELAY PULSE DEFINED BY THE EXTERNAL CAPACITOR
·EARLYWARNINGOUTPUTFORSUPPLYUN-DERVOLTAGE
·THERMALSHUTDOWNANDSHORTCIRCUIT PROTECTIONS

L4938N Connection Diagram

L4938ND Parameters

Technical/Catalog Information	L4938ND
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Regulator Type	Multiple Output
Package / Case	20-SOIC (7.5mm Width)
Packaging	Tube
Regulator Topology	Positive Fixed and Adjustable
Current - Output	50mA, 500mA
Voltage - Output	5V, 5 ~ 20 V
Operating Temperature	-40°C ~ 125°C
Voltage - Input	6 ~ 25 V
Number of Regulators	2
Current - Limit (Min)	55mA, 550mA
Current Short Circuit (Isc)	-
Drawing Number	*
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L4938ND L4938ND

L4938ND General Description

L4938ND Maximum Ratings

Symbol	Parameter	Value	Unit
V_S	DC Supply Voltage	28	V
	Transient Supply Voltage (T < 1s)	40	V
T_j,T_stg	Junction and Storage Temperature Range	-55to150	°C
I_SI	Sense Input Current (V_SI0.3V or V_SI>V_S)	±1	mA
I_EN	Enable Input Current (V_EN0.3V)	±1	mA
V_EN	Enable Input Voltage	V_S
V_RES,V_SO	Reset and Sense Output Voltage	20	V
I_RES,I_SO	Reset and Sense Output Current	5	mA
P_D	Power Dissipation	75	mW

Note : The circuit is ESD protected according to MILSTD883C

L4938ND Features

L4938ND Connection Diagram

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