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  • The L4938ED and L4938EPD are monolithic integrated dual voltage regulators with two very low dropout outputs and additional functions such as power-on reset and input voltage sense. They are designed for supplying microcomputer controlled systems especially in automotive applications.

    Key Features

    • Output 2 voltage 5 V ± 2% with 400 mA current capability (ADJ wired to VOUT2)
    • High precision standby output voltage 5 V ± 1% with 100 mA current capability
    • Output 2 disable function for standby mode
    • Enable and sense inputs (EN, SI) protected against negative transients down to -5 V
    • Extremely low quiescent current, 65 μA (less than 90 μA) in standby mode
    • Reset threshold adjustable from 3.8 V to 4.7 V
    • Operating transient supply voltage up to 40 V
    • Output 2 voltage adjustable by external voltage divider
    • Operating DC supply voltage range 5 V - 28 V

Circuit Diagram

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Sample & Buy

Part Number
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
More info
Order from Distributors
Order from ST
min
max
L4938EPD13TR PowerSO-20 Tape And Reel - -
Active
- EAR99
MORE INFO

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office Buy now
L4938EPD PowerSO-20 Tube - -
NRND
- EAR99
MORE INFO

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office Buy now

L4938EPD13TR

Package

PowerSO-20

Packing Type

Tape And Reel

Unit Price (US$)

*

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4938EPD

Package

PowerSO-20

Packing Type

Tube

Unit Price (US$)

*

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

NRND

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS6753
      Advanced voltage regulator
      2.0
      270.88 KB
      PDF
      DS6753

      Advanced voltage regulator

    • Description Version Size Action
      AN290
      VERY LOW DROP REGULATORS ENHANCE SUPPLY PERFORMANCE
      1.2
      525.66 KB
      PDF
      AN290

      VERY LOW DROP REGULATORS ENHANCE SUPPLY PERFORMANCE

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF
      Smart power solutions for car body applications 4.0
      3.38 MB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

      Smart power solutions for car body applications

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4938EPD
NRND
PowerSO-20 Automotive Ecopack2
L4938EPD13TR
Active
PowerSO-20 Automotive Ecopack2

L4938EPD

Package:

PowerSO-20

Material Declaration**:

Marketing Status

NRND

Package

PowerSO-20

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L4938EPD13TR

Package:

PowerSO-20

Material Declaration**:

Marketing Status

Active

Package

PowerSO-20

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.