L6902

Active

1 A switching regulator with adjustable current limit

Download datasheet
Overview
Sample & Buy
Solutions
Resources
Tools & Software
Quality & Reliability
eDesignSuite
Get Started
Partner products
Sales Briefcase
  • The L6902D is a complete and simple step down switching regulator with adjustable current limit.

    Based on a voltage mode structure it integrates a current error amplifier to have a constant voltage and constant current control.
    By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate (±5%). Moreover constant current control can be used to charge NiMH and NiCd batteries.
    The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor).
    The internal robust P-channel DMOS transistor with a typical of 250 mΩ assures high efficiency and a minimum dropout even at high output current level. The internal limiting current (latched function) of typical value of 2.5 A protects the device from accidental output short circuit avoiding dangerous loads damage.
    If the temperature of the chip goes higher than a fixed internal threshold (150°C with 20°C hysteresis), the power stage is turned off.
    Other protections beside thermal shutdown complete the device for a safe and reliable application: overvoltage protection, frequency folback overcurrent protection and protection vs. feedback disconnection.
    The internal fixed switching frequency of 250KHz, and the SO-8 package pin allow to built an ultra compact DC/ DC converter with a minimum board space.

    Key Features

    • Up to 1 A output current
    • Operating input voltage from 8 V to 36 V
    • Precise 3.3 V (±2%) reference voltage
    • 5 % output current accuracy
    • Output voltage adjustable from 1.235 V to 34 V
    • 250 kHz internally fixed frequency
    • Voltage feedforward
    • Zero load current operation
    • Adjustable current limit
    • Protection against feedback Disconnection
    • Thermal shutdown

Circuit Diagram

Download Download

Recommended for you

Evaluation Tools

    • Part Number

      1 A constant current DC/DC converter evaluation board based on the L6902D

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS2033
      Up to 1 A switching regulator with adjustable current limit
      9.0
      197.56 KB
      PDF
      DS2033

      Up to 1 A switching regulator with adjustable current limit

    • Description Version Size Action
      AN2129
      Dimming of super high brightness LEDs with L6902D
      2.3
      357.13 KB
      PDF
      AN1941
      Low Voltage LED Driver Using L6920D, L4971 and L6902D
      1.5
      499.38 KB
      PDF
      AN2129

      Dimming of super high brightness LEDs with L6902D

      AN1941

      Low Voltage LED Driver Using L6920D, L4971 and L6902D

    • Description Version Size Action
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6902D
Active
SO-8 Industrial Ecopack2 (**)
L6902D013TR
Active
SO-8 Industrial Ecopack2 (**)

L6902D

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L6902D013TR

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

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.

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

LED Driver

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

LED custom

V This option is required.
A This option is required.
Ω This option is required.

LEDs

This option is required. And must be a whole positive number between 1 and 20.
This option is required. And must be a whole positive number between 1 and 20.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
L6902D Available at 8 distributors

Distributor availability ofL6902D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2621 1 Order Now
RS COMPONENTS EUROPE 2008 1 Order Now
FUTURE WORLDWIDE 2097 1 Order Now
ARROW EUROPE 1700 0 Order Now
MOUSER WORLDWIDE 2921 1 Order Now
Farnell Element14 EUROPE 733 1 Order Now
ANGLIA Live EUROPE 160 1 Order Now
RUTRONIK EUROPE 3500 100 Order Now

Distributor reported inventory date: 2020-07-09

Distributor Name

DIGIKEY

Stock

2621

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2008

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2097

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1700

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2921

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

733

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

160

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

3500

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-09

Buy now SO-8 Tube
Active
EAR99 CHINA 1.145 / 1k
L6902D013TR Available at 6 distributors

Distributor availability ofL6902D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 8875 1 Order Now
ARROW EUROPE 17500 0 Order Now
Newark Element14 AMERICA 1053 0 Order Now
ARROW AMERICA 7506 1 Order Now
MOUSER WORLDWIDE 6371 1 Order Now
Farnell Element14 EUROPE 2649 1 Order Now

Distributor reported inventory date: 2020-07-09

Distributor Name

DIGIKEY

Stock

8875

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

17500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1053

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

7506

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

6371

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2649

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-09

Buy now SO-8 Tape And Reel
Active
EAR99 CHINA 1.145 / 1k

L6902D

Package

SO-8

Packing Type

Tube

Budgetary Price (US$)*/Qty

1.145 / 1k

Distributor availability ofL6902D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2621 1 Order Now
RS COMPONENTS EUROPE 2008 1 Order Now
FUTURE WORLDWIDE 2097 1 Order Now
ARROW EUROPE 1700 0 Order Now
MOUSER WORLDWIDE 2921 1 Order Now
Farnell Element14 EUROPE 733 1 Order Now
ANGLIA Live EUROPE 160 1 Order Now
RUTRONIK EUROPE 3500 100 Order Now

Distributor reported inventory date: 2020-07-09

Distributor Name

DIGIKEY

Stock

2621

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2008

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2097

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1700

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2921

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

733

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

160

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

3500

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-09

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.145 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

L6902D013TR

Package

SO-8

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

1.145 / 1k

Distributor availability ofL6902D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 8875 1 Order Now
ARROW EUROPE 17500 0 Order Now
Newark Element14 AMERICA 1053 0 Order Now
ARROW AMERICA 7506 1 Order Now
MOUSER WORLDWIDE 6371 1 Order Now
Farnell Element14 EUROPE 2649 1 Order Now

Distributor reported inventory date: 2020-07-09

Distributor Name

DIGIKEY

Stock

8875

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

17500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1053

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

7506

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

6371

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2649

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-09

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.145 / 1k

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