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  • The LDS3985 provides up to 300 mA, from 2.5 V to 6 V input voltage. It is stable with ceramic and high quality tantalum capacitor. The ultra low drop voltage, low quiescent current and low noise make it suitable for low power applications and battery-powered systems. Shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. Typical applications are mobile phones and similar battery-powered wireless systems, portable information appliances.

    Key Features

    • Input voltage from 2.5 V to 6 V
    • Stable with low ESR ceramic capacitors
    • Very low dropout voltage (150 mV typ. at 300 mA load, 0.4 mV typ. at 1 mA load)
    • Very low quiescent current (85 µA typ. at no load, 200 µA typ. at 300 mA load; max.1.5 µA in OFF mode)
    • Guaranteed output current up to 300 mA
    • Wide range of output voltages available on request: fixed from 1.25 V to 5 V with 100 mV step
    • Fast turn-on time: typ. 240 µs
      • [CO = 2.2 µF, CBYP = 33 nF and IO= 1 mA]
    • Logic-controlled electronic shutdown
    • Internal current and thermal limit
    • Low output voltage noise: 30 µ VRMS over 10 Hz to 100 kHz
    • SVR of 55 dB at 1 kHz, 50 dB at 10 kHz
    • Temperature range: - 40 °C to 125 °C
    • Automotive grade product available in DFN6 package, temperature range: - 40 °C to 85 °C

Sample & Buy

Part Number
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
Budgetary Price (US$)*
Quantity
More info
Order from Distributors
Order from ST
LDS3985M30R SOT23-5L Tape And Reel 3 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985M30R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13023 1 Order Now
MOUSER WORLDWIDE 2634 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

13023

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2634

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-21

Buy direct
LDS3985M25R SOT23-5L Tape And Reel 2.5 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6304 1 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 2843 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

6304

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2843

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-21

Buy direct
LDS3985PU33RY DFN6 3x3 Tape And Reel 3.3 3 0.3
Active
0.6 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2819 1 Order Now

Distributor reported inventory date: 2019-04-20

Distributor Name

Farnell Element14

Stock

2819

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-20

Buy direct
LDS3985M28R SOT23-5L Tape And Reel 2.8 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985M18R SOT23-5L Tape And Reel 1.8 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 33 1 Order Now
AVNET AMERICA 57000 0 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

33

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

57000

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2019-04-21

Buy direct
LDS3985PU33R DFN6 3x3 Tape And Reel 3.3 3 0.3
Active
0.401 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985M33R SOT23-5L Tape And Reel 3.3 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 27437 1 Order Now
RS COMPONENTS EUROPE 3925 25 Order Now
FUTURE WORLDWIDE 10390 1 Order Now
MOUSER WORLDWIDE 9784 1 Order Now
Farnell Element14 EUROPE 4791 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

27437

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3925

Min.Order

25

Region

EUROPE Order Now

FUTURE

Stock

10390

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

9784

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4791

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-21

Buy direct
LDS3985M50R SOT23-5L Tape And Reel 5 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985PU15R DFN6 3x3 Tape And Reel 1.5 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985PU28R DFN6 3x3 Tape And Reel 2.8 3 0.3
Active
0.401 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985M15R SOT23-5L Tape And Reel 1.5 3 0.3
Active
0.24 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office Buy direct
LDS3985PU18RY DFN6 3x3 Tape And Reel 1.8 3 0.3
Active
0.6 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985PU18RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2910 1 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
MOUSER WORLDWIDE 5999 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

2910

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

MOUSER

Stock

5999

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-21

Buy direct

LDS3985M30R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M30R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13023 1 Order Now
MOUSER WORLDWIDE 2634 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

13023

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2634

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-21

Output Voltage (V) (nom)

3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M25R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6304 1 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 2843 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

6304

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2843

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-21

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU33RY

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.6*

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2819 1 Order Now

Distributor reported inventory date: 2019-04-20

Distributor Name

Farnell Element14

Stock

2819

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-20

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.6

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M28R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

2.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M18R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 33 1 Order Now
AVNET AMERICA 57000 0 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

33

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

57000

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2019-04-21

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU33R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.401*

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.401

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M33R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 27437 1 Order Now
RS COMPONENTS EUROPE 3925 25 Order Now
FUTURE WORLDWIDE 10390 1 Order Now
MOUSER WORLDWIDE 9784 1 Order Now
Farnell Element14 EUROPE 4791 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

27437

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3925

Min.Order

25

Region

EUROPE Order Now

FUTURE

Stock

10390

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

9784

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4791

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-21

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M50R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU15R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

1.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU28R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.401*

Output Voltage (V) (nom)

2.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.401

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M15R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

1.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU18RY

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.6*

Distributor availability ofLDS3985PU18RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2910 1 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
MOUSER WORLDWIDE 5999 1 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

2910

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

MOUSER

Stock

5999

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-21

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.6

Quantity

1000

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

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS4148
      Very low drop and low noise BiCMOS 300 mA voltage regulator
      10.0
      938.02 KB
      PDF
      DS4148

      Very low drop and low noise BiCMOS 300 mA voltage regulator

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
      Brochure Power management guide 10.2018
      4.42 MB
      PDF
      Low-dropout (LDO) linear voltage regulators - Quick Reference Guide 2.0
      216.23 KB
      PDF
      Power management for handheld and portable 2.0
      1.09 MB
      PDF

      Brochure Power management guide

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

      Power management for handheld and portable

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LDS3985M15R
Active
SOT23-5L Industrial Ecopack2
LDS3985M18R
Active
SOT23-5L Industrial Ecopack2
LDS3985M25R
Active
SOT23-5L Industrial Ecopack2
LDS3985M28R
Active
SOT23-5L Industrial Ecopack2
LDS3985M30R
Active
SOT23-5L Industrial Ecopack2
LDS3985M33R
Active
SOT23-5L Industrial Ecopack2
LDS3985M50R
Active
SOT23-5L Industrial Ecopack2
LDS3985PU15R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU18RY
Active
DFN6 3x3 Automotive Ecopack2
LDS3985PU28R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU33R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU33RY
Active
DFN6 3x3 Automotive Ecopack2

LDS3985M15R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M18R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M25R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M28R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M30R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M33R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M50R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU15R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU18RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LDS3985PU28R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU33R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU33RY

Package:

DFN6 3x3

Material Declaration**:

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.