Buck-Boost Controller

with Integrated Buck MOSFET

A4450

2

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

SELECTION GUIDE

Part Number

Temperature Range

Package

Lead Frame

A4450KESTR-J

–40°C to 150°C

1500 pieces per 7-inch reel

20-pin QFN with thermal pad and wettable flank

100% matte tin

1

Contact Allegro for additional packing options.

SPECIFICATIONS

Characteristic

Symbol

Notes

Rating

Unit

VIN

–0.3 to 40

V

AVIN

–0.3 to 40

V

EN

V

LX

continuous

V

t < 250 ns

–1.5

V

t < 50 ns

V

LG

–0.3 to 8.5

V

BOOT

V

All other pins

–0.3 to 7.5

V

Junction Temperature Range

–40 to 150

°C

Storage Temperature Range

–55 to 150

°C

2

Stresses beyond those listed in this table may cause permanent damage to the device. The absolute maximum ratings are stress ratings only, and functional operation of

the device at these or any other conditions beyond those indicated in the Electrical Characteristics table is not implied. Exposure to absolute-maximum-rated conditions for

extended periods may affect device reliability

THERMAL CHARACTERISTICS

Characteristic

Symbol

Value

Unit

Junction to Ambient Thermal Resistance

QFN-20 (ES) package, 4-layer PCB based on JEDEC standard

37

°C/W

3

Additional thermal information available on the Allegro website.