Very low drop voltage regulators with inhibit

Download datasheet

This product is in stock in our e-store

Sample and buy
Overview
Tools & Software
Resources
Solutions
Quality & Reliability
Sales Briefcase
eDesignSuite
Get Started
Sample & Buy
Partner products
  • The KF series are very low drop regulators available in SO-8 and DPAK packages and in a wide range of output voltages.

    The very low dropout voltage (0.4 V) and the very low quiescent current make them particularly suitable for low noise, low power applications and especially in battery powered systems.
    A shutdown logic control function is available (pin 5, TTL compatible). This means that when the device is used as a local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. It requires only a 2.2 μF capacitor for stability allowing space and cost saving.

    Key Features

    • Very low dropout voltage (0.4 V)
    • Very low quiescent current (typ. 50 μA in OFF mode, 500 μA in ON mode)
    • Output current up to 500 mA
    • Logic-controlled electronic shutdown
    • Output voltages of 2.5; 3.3; 5; 8 V
    • Internal current and thermal limit
    • Only 2.2 μF for stability
    • Available in ± 2 % accuracy at 25 °C
    • Supply voltage rejection: 70 db (typ.)
    • Temperature range: - 40 to 125 °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
KF33BD-TR SO-8 Tape And Reel 3.3 2 0.5
Active
0.32 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF33BD-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9595 1 Order Now
RS COMPONENTS EUROPE 10295 5 Order Now
AVNET AMERICA 2500 0 Order Now
ARROW EUROPE 52500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 12662 1 Order Now
Farnell Element14 EUROPE 13677 1 Order Now
ANGLIA Live EUROPE 9707 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

9595

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

10295

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

52500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

12662

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

13677

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

9707

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF80BDT-TR DPAK Tape And Reel 8 2 0.5
Active
0.343 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF80BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1483 1 Order Now
RS COMPONENTS EUROPE 230 1 Order Now
ARROW EUROPE 2500 0 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

1483

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

230

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF50BDT-TR DPAK Tape And Reel 5 2 0.5
Active
0.343 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF50BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 18726 1 Order Now
RS COMPONENTS EUROPE 2735 5 Order Now
Newark Element14 AMERICA 100 0 Order Now
MOUSER WORLDWIDE 6288 1 Order Now
Farnell Element14 EUROPE 82 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

18726

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2735

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

100

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

6288

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

82

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF50BD-TR SO-8 Tape And Reel 5 2 0.5
Active
0.32 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF50BD-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2418 1 Order Now
RS COMPONENTS EUROPE 11355 5 Order Now
ARROW EUROPE 2500 0 Order Now
MOUSER WORLDWIDE 6007 1 Order Now
Farnell Element14 EUROPE 1558 1 Order Now
ANGLIA Live EUROPE 10191 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

2418

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

11355

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

6007

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1558

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

10191

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF25BD-TR SO-8 Tape And Reel 2.5 2 0.5
Active
0.32 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF25BD-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2287 1 Order Now
RS COMPONENTS EUROPE 2612 1 Order Now
ARROW EUROPE 2500 0 Order Now
ARROW AMERICA 671 1 Order Now
MOUSER WORLDWIDE 4529 1 Order Now
Farnell Element14 EUROPE 4089 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

2287

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2612

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

671

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

4529

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4089

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF25BDT-TR DPAK Tape And Reel 2.5 2 0.5
Active
0.368 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF25BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1290 1 Order Now
MOUSER WORLDWIDE 2400 1 Order Now
Farnell Element14 EUROPE 1914 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

1290

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2400

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1914

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF33BDT-TR DPAK Tape And Reel 3.3 2 0.5
Active
0.368 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofKF33BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 15002 1 Order Now
RS COMPONENTS EUROPE 13950 5 Order Now
AVNET AMERICA 2146 0 Order Now
FUTURE WORLDWIDE 1575 1 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 19090 1 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

15002

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

13950

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

2146

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

1575

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

19090

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

KF33BD-TR

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.32*

Distributor availability ofKF33BD-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9595 1 Order Now
RS COMPONENTS EUROPE 10295 5 Order Now
AVNET AMERICA 2500 0 Order Now
ARROW EUROPE 52500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 12662 1 Order Now
Farnell Element14 EUROPE 13677 1 Order Now
ANGLIA Live EUROPE 9707 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

9595

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

10295

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

52500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

12662

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

13677

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

9707

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.32

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

KF80BDT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.343*

Distributor availability ofKF80BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1483 1 Order Now
RS COMPONENTS EUROPE 230 1 Order Now
ARROW EUROPE 2500 0 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

1483

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

230

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

8

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.343

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

KF50BDT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.343*

Distributor availability ofKF50BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 18726 1 Order Now
RS COMPONENTS EUROPE 2735 5 Order Now
Newark Element14 AMERICA 100 0 Order Now
MOUSER WORLDWIDE 6288 1 Order Now
Farnell Element14 EUROPE 82 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

18726

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2735

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

100

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

6288

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

82

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.343

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

KF50BD-TR

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.32*

Distributor availability ofKF50BD-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2418 1 Order Now
RS COMPONENTS EUROPE 11355 5 Order Now
ARROW EUROPE 2500 0 Order Now
MOUSER WORLDWIDE 6007 1 Order Now
Farnell Element14 EUROPE 1558 1 Order Now
ANGLIA Live EUROPE 10191 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

2418

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

11355

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

6007

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1558

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

10191

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.32

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

KF25BD-TR

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.32*

Distributor availability ofKF25BD-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2287 1 Order Now
RS COMPONENTS EUROPE 2612 1 Order Now
ARROW EUROPE 2500 0 Order Now
ARROW AMERICA 671 1 Order Now
MOUSER WORLDWIDE 4529 1 Order Now
Farnell Element14 EUROPE 4089 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

2287

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2612

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

671

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

4529

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4089

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.32

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

KF25BDT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.368*

Distributor availability ofKF25BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1290 1 Order Now
MOUSER WORLDWIDE 2400 1 Order Now
Farnell Element14 EUROPE 1914 1 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

1290

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2400

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1914

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.368

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

KF33BDT-TR

Package

DPAK

Packing Type

Tape And Reel

Unit Price (US$)

0.368*

Distributor availability ofKF33BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 15002 1 Order Now
RS COMPONENTS EUROPE 13950 5 Order Now
AVNET AMERICA 2146 0 Order Now
FUTURE WORLDWIDE 1575 1 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 19090 1 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2019-05-26

Distributor Name

DIGIKEY

Stock

15002

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

13950

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

2146

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

1575

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

19090

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-26

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

0.5

Marketing Status

Active

Unit Price (US$)

0.368

Quantity

1000

ECCN (US)

EAR99

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

Recommended for you

Related Applications

Smart Farming

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS0912
      Very low drop voltage regulators with inhibit
      14.0
      554.99 KB
      PDF
      DS0912

      Very low drop voltage regulators with inhibit

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**
KF25BD-TR
Active
SO-8 Industrial Ecopack2
KF25BDT-TR
Active
DPAK Industrial Ecopack2
KF33BD-TR
Active
SO-8 Industrial Ecopack2
KF33BDT-TR
Active
DPAK Industrial Ecopack2
KF50BD-TR
Active
SO-8 Industrial Ecopack2
KF50BDT-TR
Active
DPAK Industrial Ecopack2
KF80BDT-TR
Active
DPAK Industrial Ecopack2

KF25BD-TR

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

KF25BDT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

KF33BD-TR

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

KF33BDT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

KF50BD-TR

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

KF50BDT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

KF80BDT-TR

Package:

DPAK

Material Declaration**:

Marketing Status

Active

Package

DPAK

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.