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  • 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

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

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EDA Symbols, Footprints and 3D Models

STMicroelectronics - L6902

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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

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
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6902D Available at 8 distributors

Distributor availability ofL6902D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2586 1 Order Now
RS COMPONENTS EUROPE 1971 1 Order Now
FUTURE WORLDWIDE 1267 1 Order Now
ARROW EUROPE 974 0 Order Now
MOUSER WORLDWIDE 2900 1 Order Now
Farnell Element14 EUROPE 662 1 Order Now
ANGLIA Live EUROPE 150 1 Order Now
RUTRONIK EUROPE 3500 100 Order Now

Distributor reported inventory date: 2020-10-28

Distributor Name

DIGIKEY

Stock

2586

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1971

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1267

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

974

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2900

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

662

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

150

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

3500

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-28

Buy Direct
Active
EAR99 NEC Tube SO-8 - - CHINA 1.145 / 1k
L6902D013TR Available at 7 distributors

Distributor availability ofL6902D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7222 1 Order Now
ARROW EUROPE 32500 0 Order Now
Newark Element14 AMERICA 1053 0 Order Now
ARROW AMERICA 2506 1 Order Now
MOUSER WORLDWIDE 6051 1 Order Now
Farnell Element14 EUROPE 2272 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2020-10-28

Distributor Name

DIGIKEY

Stock

7222

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

32500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1053

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2506

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

6051

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2272

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-28

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

L6902D

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.145 / 1k

Distributor availability ofL6902D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2586 1 Order Now
RS COMPONENTS EUROPE 1971 1 Order Now
FUTURE WORLDWIDE 1267 1 Order Now
ARROW EUROPE 974 0 Order Now
MOUSER WORLDWIDE 2900 1 Order Now
Farnell Element14 EUROPE 662 1 Order Now
ANGLIA Live EUROPE 150 1 Order Now
RUTRONIK EUROPE 3500 100 Order Now

Distributor reported inventory date: 2020-10-28

Distributor Name

DIGIKEY

Stock

2586

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1971

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1267

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

974

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2900

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

662

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

150

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

3500

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-28

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.145 / 1k

Country of Origin

CHINA

L6902D013TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.145 / 1k

Distributor availability ofL6902D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7222 1 Order Now
ARROW EUROPE 32500 0 Order Now
Newark Element14 AMERICA 1053 0 Order Now
ARROW AMERICA 2506 1 Order Now
MOUSER WORLDWIDE 6051 1 Order Now
Farnell Element14 EUROPE 2272 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2020-10-28

Distributor Name

DIGIKEY

Stock

7222

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

32500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1053

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2506

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

6051

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2272

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-28

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.145 / 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