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  • The LDO40L is a 400 mA LDO regulator, designed for being used in severe automotive environments.

    Low quiescent current makes it suitable for applications permanently connected to battery. This feature is especially critical when electronic modules remain in active mode when ignition is off.
    The LDO40L embeds protection functions, such as: current limit and thermal shutdown.
    The extended input voltage range, low drop voltage and low quiescent current features make it suitable also for low power industrial and consumer applications.

    Key Features

    • Low quiescent current: typ. 45 µA at no load
    • Wide input voltage operating range up to 38 V
    • Low startup voltage: 3.5 V
    • Output current up to 400 mA
    • Output voltage options: Adj from 2.5 V and fixed, 3.0, 3.3, 5.0 and 8.5 V
    • Output voltage accuracy:
      • ± 1% typ. @ 25 °C
      • ± 3% (including line, load and temperature variation)
    • Ultra low-dropout:
      • 36 mV @ 100 mA load current
      • 140 mV @ 400 mA load current
    • High PSRR: 70 dB @ 1 kHz
    • Very low noise: 20 µVRMS/VOUT
    • Protection features: current limitation, thermal shutdown
    • -40 °C to +125 °C operating temperature range
    • Package: DFN6 (3x3) (wettable flanks)
    • AEC-Q100 qualified (grade 1)

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS12711
      400 mA, 38 V low-dropout regulator, with 45 μA quiescent current
      3.0
      813.47 KB
      PDF
      DS12711

      400 mA, 38 V low-dropout regulator, with 45 μA quiescent current

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

    • Description Version Size Action
      Low-dropout (LDO) linear voltage regulators Quick Reference Guide 2.1
      1.78 MB
      PDF
      Power management for handheld and portable 2.0
      1.09 MB
      PDF

      Low-dropout (LDO) linear voltage regulators Quick Reference Guide

      Power management for handheld and portable

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LDO40LPU33RY
Active
DFN6 3x3 Automotive Ecopack2
LDO40LPU50RY
Active
DFN6 3x3 Automotive Ecopack2
LDO40LPURY
Active
DFN6 3x3 Automotive Ecopack2

LDO40LPU33RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LDO40LPU50RY

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LDO40LPURY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

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
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
LDO40LPU33RY Available at 6 distributors

Distributor availability ofLDO40LPU33RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1180 1 Order Now
RS COMPONENTS EUROPE 220 1 Order Now
AVNET AMERICA 3000 0 Order Now
ARROW EUROPE 2856 0 Order Now
MOUSER WORLDWIDE 4438 1 Order Now
Farnell Element14 EUROPE 2995 1 Order Now

Distributor reported inventory date: 2020-07-13

Distributor Name

DIGIKEY

Stock

1180

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

220

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2856

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4438

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2995

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-13

Buy now DFN6 3x3 Tape And Reel 3.3 1 0.4
Active
EAR99 THAILAND 0.62 / 1k
LDO40LPU50RY Available at 1 distributors

Distributor availability ofLDO40LPU50RY

Distributor Name
Region Stock Min. Order Third party link
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-07-13

Distributor Name

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-13

DFN6 3x3 Tape And Reel 5 1 0.4
Active
EAR99 THAILAND 0.62 / 1k
LDO40LPURY Available at 5 distributors

Distributor availability ofLDO40LPURY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 120 1 Order Now
RS COMPONENTS EUROPE 495 1 Order Now
Newark Element14 AMERICA 100 0 Order Now
MOUSER WORLDWIDE 1413 1 Order Now
Farnell Element14 EUROPE 2065 1 Order Now

Distributor reported inventory date: 2020-07-13

Distributor Name

DIGIKEY

Stock

120

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

495

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

100

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1413

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2065

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-13

Get sample DFN6 3x3 Tape And Reel - 1 0.4
Active
EAR99 THAILAND 0.62 / 1k

LDO40LPU33RY

Package

DFN6 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.62 / 1k

Distributor availability ofLDO40LPU33RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1180 1 Order Now
RS COMPONENTS EUROPE 220 1 Order Now
AVNET AMERICA 3000 0 Order Now
ARROW EUROPE 2856 0 Order Now
MOUSER WORLDWIDE 4438 1 Order Now
Farnell Element14 EUROPE 2995 1 Order Now

Distributor reported inventory date: 2020-07-13

Distributor Name

DIGIKEY

Stock

1180

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

220

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2856

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4438

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2995

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-13

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

1

Output Current (A) (nom)

0.4

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.62 / 1k

ECCN (US)

EAR99

Country of Origin

THAILAND

LDO40LPU50RY

Package

DFN6 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.62 / 1k

Distributor availability ofLDO40LPU50RY

Distributor Name
Region Stock Min. Order Third party link
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-07-13

Distributor Name

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-13

Output Voltage (V) (nom)

5

Output Tolerance (typ)

1

Output Current (A) (nom)

0.4

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.62 / 1k

ECCN (US)

EAR99

Country of Origin

THAILAND

LDO40LPURY

Package

DFN6 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.62 / 1k

Distributor availability ofLDO40LPURY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 120 1 Order Now
RS COMPONENTS EUROPE 495 1 Order Now
Newark Element14 AMERICA 100 0 Order Now
MOUSER WORLDWIDE 1413 1 Order Now
Farnell Element14 EUROPE 2065 1 Order Now

Distributor reported inventory date: 2020-07-13

Distributor Name

DIGIKEY

Stock

120

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

495

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

100

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1413

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2065

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-13

Output Voltage (V) (nom)

-

Output Tolerance (typ)

1

Output Current (A) (nom)

0.4

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.62 / 1k

ECCN (US)

EAR99

Country of Origin

THAILAND

(*) 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