Constant-Current 3-Ampere PWM Dimmable

Buck Regulator LED Driver

A6211

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Absolute Maximum Ratings

Characteristic

Symbol

Notes

Rating

Unit

Supply Voltage

–0.3 to 50

V

Bootstrap Drive Voltage

V

Switching Voltage

V

Linear Regulator Terminal

VCC to GND

–0.3 to 14

V

Enable and TON Voltage

V

Current Sense Voltage

–0.3 to 7

V

Operating Ambient Temperature

G temperature range

–40 to 105

ºC

Maximum Junction Temperature

150

ºC

Storage Temperature

–65 to 125

ºC

Selection Guide

Part Number

Operating Ambient

Package

Packing

A6211GLJTR-T

–40ºC to 105ºC

8-pin SOICN with exposed thermal pad

3000 pieces per 13-in reel

Characteristic

Symbol

Test Conditions*

Value

Unit

Package Thermal Resistance,

Junction to Ambient

4-layer PCB based on JEDEC standard

35

ºC/W

Package Thermal Resistance,

Junction to Pad

2

ºC/W

*Additional thermal information available on the Allegro website.

Pin-out Diagram

Terminal List Table

Number

Name

Function

1

VIN

Supply voltage input terminals

2

TON

Regulator on-time setting resistor terminal

3

EN

Logic input for Enable and PWM dimming

4

CS

Drive output current sense feedback

5

VCC

Internal linear regulator output

6

GND

Ground terminal

7

BOOT

DMOS gate driver bootstrap terminal

8

SW

Switched output terminals

–PAD

Exposed pad for enhanced thermal dissipation;

connect to GND

SW

BOOT

GND

VCC

VIN

TON

EN

CS

1

2

3

4

8

7

6

5

PAD