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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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STMicroelectronics - L4938EPD

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Quality and Reliability

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L4938EPD13TR No availability of distributors reported, please contact our sales office Buy Direct
Active
EAR99 NEC Tape And Reel PowerSO-20 - - MALAYSIA
L4938EPD No availability of distributors reported, please contact our sales office Buy Direct
NRND
EAR99 NEC Tube PowerSO-20 - - MALAYSIA

L4938EPD13TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-20

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

L4938EPD

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tube

Package

PowerSO-20

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

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