A8481EEJTR-T datasheet(2/12 Pages) ALLEGRO

Part #	A8481EEJTR-T

Description	Dual Output Boost Regulator Using Single Inductor

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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2 / 12 page

Dual Output Boost Regulator Using Single Inductor

A8481

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Ordering Information

Use the following complete part numbers when ordering:

Part Number

Packinga

Description

A8481EEJTR-Tb

7-in. reel, 1500 pieces/reel

EJ package, MLP/DFN(SON) leadless surface mount

with exposed thermal pad

aContact Allegro for additional packing options.

bLead (Pb) free, with leadframe plating 100% matte tin.

Absolute Maximum Ratings

RθJA = 45 °C/W, on a 4-layer board. Additional information is

available on the Allegro Web site.

Package Thermal Characteristics

Input or Output Voltage

SW, CAP, OUT1, OUT2 pins ..................................–0.3 to 26 V

VIN pin,VIN............................................................–0.3 to 9.5 V

All other pins, Vx ....................... –0.3 to VIN+0.3 V (7 V max.)

Operating Ambient Temperature, TA ................................ –40°C to 85°C

Maximum Junction Temperature, TJ(max)...................................... 150°C

Storage Temperature, TS .............................................. –55°C to 150°C

VIN

SW

FB1

CAP

OUT1

OUT2

Clock

0.6 V

Current Regulator

0.6 V

FB1

OUT2

0.3 V

VREF1

On/Off

Logic

Soft

Start

Select MIN

and

Error Amplifier

IREF

ISET

Decoder

Ramp

Drive

S1

S2

S3

C1

r

Temp

UVLO

VCAP

C4

C2

C5

C3

S

Oscillator

Fault

Protection

ON1

ON2

R

Q

GND

ISET

∑

Functional Block Diagram

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