1 A switching regulator with adjustable current limit

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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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L6902D SO-8 Tube
Active
1.145 10000 EAR99 CHINA Check Availability

Distributor availability ofL6902D

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DIGIKEY WORLDWIDE 3975 1 Order Now
RS COMPONENTS EUROPE 577 1 Order Now
FUTURE WORLDWIDE 899 1 Order Now
ARROW EUROPE 350 0 Order Now
MOUSER WORLDWIDE 2673 1 Order Now
Farnell Element14 EUROPE 1289 1 Order Now
ANGLIA Live EUROPE 380 1 Order Now
RUTRONIK EUROPE 5000 100 Order Now

Distributor reported inventory date: 2019-07-16

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DIGIKEY

Stock

3975

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1

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WORLDWIDE Order Now

RS COMPONENTS

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577

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1

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EUROPE Order Now

FUTURE

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899

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1

Region

WORLDWIDE Order Now

ARROW

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350

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0

Region

EUROPE Order Now

MOUSER

Stock

2673

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1

Region

WORLDWIDE Order Now

Farnell Element14

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1289

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

380

Min.Order

1

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EUROPE Order Now

RUTRONIK

Stock

5000

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100

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

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L6902D013TR SO-8 Tape And Reel
Active
1.145 10000 EAR99 CHINA Check Availability

Distributor availability ofL6902D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3544 1 Order Now
AVNET AMERICA 2500 0 Order Now
ARROW EUROPE 5000 0 Order Now
ARROW AMERICA 2506 1 Order Now
MOUSER WORLDWIDE 8451 1 Order Now
Farnell Element14 EUROPE 6483 1 Order Now
RUTRONIK EUROPE 17500 2500 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

3544

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2506

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

8451

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6483

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

17500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Buy now

L6902D

Package

SO-8

Packing Type

Tube

Unit Price (US$)

1.145*

Distributor availability ofL6902D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3975 1 Order Now
RS COMPONENTS EUROPE 577 1 Order Now
FUTURE WORLDWIDE 899 1 Order Now
ARROW EUROPE 350 0 Order Now
MOUSER WORLDWIDE 2673 1 Order Now
Farnell Element14 EUROPE 1289 1 Order Now
ANGLIA Live EUROPE 380 1 Order Now
RUTRONIK EUROPE 5000 100 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

3975

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

577

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

899

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

350

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2673

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1289

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

380

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

1.145

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

L6902D013TR

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

1.145*

Distributor availability ofL6902D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3544 1 Order Now
AVNET AMERICA 2500 0 Order Now
ARROW EUROPE 5000 0 Order Now
ARROW AMERICA 2506 1 Order Now
MOUSER WORLDWIDE 8451 1 Order Now
Farnell Element14 EUROPE 6483 1 Order Now
RUTRONIK EUROPE 17500 2500 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

3544

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2506

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

8451

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6483

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

17500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

1.145

Quantity

10000

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

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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**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L6902D013TR

Package:

SO-8

Material Declaration**:

PDF XML

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.