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  • The LD2985 is a 150 mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. In sleep mode quiescent current is less than 1 μA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin 3 (TTL compatible). 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. An external capacitor, CBYP= 10 nF, connected between bypass pin and GND reduces the noise to 30 μVrms. Typical application are in cellular phone, palmtop laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.

    Key Features

    • Very low dropout voltage (280 mV at 150 mA and 7 mV at 1 mA load)
    • Very low quiescent current (2 mA typ. at 150 mA load and 80 μA at no load)
    • Output current up to 150 mA
    • Logic controlled electronic shutdown
    • Output voltage of 1.8, 2.5, 2.8, 3, 3.1, 3.3, 5 V
    • Internal current and thermal limit
    • Low output noise voltage 30 mVrms
    • Small package SOT23-5L
    • Temperature range: - 40°C to 125 °C

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Smart Farming

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS3234
      Very low drop and low noise voltage regulator with inhibit function
      14.0
      773.56 KB
      PDF
      DS3234

      Very low drop and low noise voltage regulator with inhibit function

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**
LD2985BM18R
Active
SOT23-5L Industrial Ecopack2
LD2985BM25R
Active
SOT23-5L Industrial Ecopack2
LD2985BM28R
Active
SOT23-5L Industrial Ecopack2
LD2985BM30R
Active
SOT23-5L Industrial Ecopack2
LD2985BM31R
Active
SOT23-5L Industrial Ecopack2
LD2985BM33R
Active
SOT23-5L Industrial Ecopack2
LD2985BM50R
Active
SOT23-5L Industrial Ecopack2

LD2985BM18R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2985BM25R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2985BM28R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2985BM30R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2985BM31R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2985BM33R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LD2985BM50R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

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
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ECCN (US)
ECCN (EU)
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Temperature (°C) Output Voltage (V) (nom)
Budgetary Price (US$)*/Qty
More info
min
max
LD2985BM25R Available at 5 distributors

Distributor availability ofLD2985BM25R

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Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6197 1 Order Now
AVNET AMERICA 6000 0 Order Now
ARROW AMERICA 18000 3000 Order Now
MOUSER WORLDWIDE 7983 1 Order Now
Farnell Element14 EUROPE 2381 1 Order Now

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Stock

6197

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1

Region

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Stock

6000

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0

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18000

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3000

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Stock

2381

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 2.5 0.166 / 1k
MORE INFO

Output Tolerance (typ):

2.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

MALAYSIA

LD2985BM31R Available at 1 distributors

Distributor availability ofLD2985BM31R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 95 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

MOUSER

Stock

95

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-14

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3.1 0.166 / 1k
MORE INFO

Output Tolerance (typ):

1.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

MALAYSIA

LD2985BM28R Available at 3 distributors

Distributor availability ofLD2985BM28R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5987 1 Order Now
RS COMPONENTS EUROPE 1470 1 Order Now
MOUSER WORLDWIDE 2770 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

5987

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1470

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

2770

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-14

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 2.8 0.166 / 1k
MORE INFO

Output Tolerance (typ):

2.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

MALAYSIA

LD2985BM50R Available at 8 distributors

Distributor availability ofLD2985BM50R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 8061 1 Order Now
RS COMPONENTS EUROPE 8340 1 Order Now
ARROW EUROPE 45000 0 Order Now
Newark Element14 AMERICA 1062 0 Order Now
MOUSER WORLDWIDE 6264 1 Order Now
Farnell Element14 EUROPE 1290 1 Order Now
ANGLIA Live EUROPE 6000 10 Order Now
RUTRONIK EUROPE 3000 3000 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

8061

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

8340

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

45000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1062

Min.Order

0

Region

AMERICA Order Now

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Stock

6264

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1290

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

6000

Min.Order

10

Region

EUROPE Order Now

RUTRONIK

Stock

3000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 5 0.166 / 1k
MORE INFO

Output Tolerance (typ):

2.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

CHINA

LD2985BM33R Available at 8 distributors

Distributor availability ofLD2985BM33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 14761 1 Order Now
COMPEL EUROPE 2882 1 Order Now
ARROW EUROPE 48000 0 Order Now
ARROW AMERICA 63000 1 Order Now
MOUSER WORLDWIDE 6267 1 Order Now
Farnell Element14 EUROPE 5805 1 Order Now
ANGLIA Live EUROPE 3000 500 Order Now
RUTRONIK EUROPE 39000 3000 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

14761

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2882

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

48000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

63000

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

6267

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5805

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3000

Min.Order

500

Region

EUROPE Order Now

RUTRONIK

Stock

39000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3.3 0.166 / 1k
MORE INFO

Output Tolerance (typ):

2.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

CHINA

LD2985BM18R Available at 5 distributors

Distributor availability ofLD2985BM18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6367 1 Order Now
AVNET AMERICA 6000 0 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 6000 3000 Order Now
RUTRONIK EUROPE 12000 3000 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

6367

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

RUTRONIK

Stock

12000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 1.8 0.166 / 1k
MORE INFO

Output Tolerance (typ):

2.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

MALAYSIA

LD2985BM30R Available at 5 distributors

Distributor availability ofLD2985BM30R

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 18000 0 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 4844 1 Order Now
Farnell Element14 EUROPE 3239 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

AVNET

Stock

18000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

4844

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3239

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3 0.166 / 1k
MORE INFO

Output Tolerance (typ):

2.5

Output Current (A) (nom):

0.15

Unit Price (US$):

0.166

Country of Origin:

CHINA

LD2985BM25R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6197 1 Order Now
AVNET AMERICA 6000 0 Order Now
ARROW AMERICA 18000 3000 Order Now
MOUSER WORLDWIDE 7983 1 Order Now
Farnell Element14 EUROPE 2381 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

6197

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

18000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

7983

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2381

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

MALAYSIA

LD2985BM31R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM31R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 95 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

MOUSER

Stock

95

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.1

Output Tolerance (typ)

1.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

MALAYSIA

LD2985BM28R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM28R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5987 1 Order Now
RS COMPONENTS EUROPE 1470 1 Order Now
MOUSER WORLDWIDE 2770 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

5987

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1470

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

2770

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

2.8

Output Tolerance (typ)

2.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

MALAYSIA

LD2985BM50R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM50R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 8061 1 Order Now
RS COMPONENTS EUROPE 8340 1 Order Now
ARROW EUROPE 45000 0 Order Now
Newark Element14 AMERICA 1062 0 Order Now
MOUSER WORLDWIDE 6264 1 Order Now
Farnell Element14 EUROPE 1290 1 Order Now
ANGLIA Live EUROPE 6000 10 Order Now
RUTRONIK EUROPE 3000 3000 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

8061

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

8340

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

45000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1062

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

6264

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1290

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

6000

Min.Order

10

Region

EUROPE Order Now

RUTRONIK

Stock

3000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

CHINA

LD2985BM33R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 14761 1 Order Now
COMPEL EUROPE 2882 1 Order Now
ARROW EUROPE 48000 0 Order Now
ARROW AMERICA 63000 1 Order Now
MOUSER WORLDWIDE 6267 1 Order Now
Farnell Element14 EUROPE 5805 1 Order Now
ANGLIA Live EUROPE 3000 500 Order Now
RUTRONIK EUROPE 39000 3000 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

14761

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2882

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

48000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

63000

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

6267

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5805

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

3000

Min.Order

500

Region

EUROPE Order Now

RUTRONIK

Stock

39000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

CHINA

LD2985BM18R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6367 1 Order Now
AVNET AMERICA 6000 0 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 6000 3000 Order Now
RUTRONIK EUROPE 12000 3000 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

6367

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

RUTRONIK

Stock

12000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

2.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

MALAYSIA

LD2985BM30R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.166 / 1k

Distributor availability ofLD2985BM30R

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 18000 0 Order Now
ARROW EUROPE 3000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 4844 1 Order Now
Farnell Element14 EUROPE 3239 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

AVNET

Stock

18000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

4844

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3239

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3

Output Tolerance (typ)

2.5

Output Current (A) (nom)

0.15

Budgetary Price (US$)* / Qty

0.166 / 1k

Country of Origin

CHINA

(*) 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