A8450KLB datasheet(2/15 Pages) ALLEGRO

2 / 15 page

A8450KLB-DS, Rev. 1

Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

A8450

Automotive Multioutput Voltage Regulator

Functional Block Diagram

Characteristics

Representative Device

C1, C2, C3, C4

1 µF, 25 V ceramic X7R

COUT

100 µF, 35 V low-ESR electrolytic

UHC1V101M, Nichicon

CIN

47 µF, 63 V electrolytic

C7, C8

0.1 µF, 50 V ceramic X7R (for 14 V applications), or

0.1 µF, 100 V ceramic X7R (for 42 V applications)

C10

0.22 µF, 10 V X7R

D1, D2

1 A, 40 V Schottky (for 14 V applications)

EKO4, Sanken

100 µH, 1.2 A

D03316HT, Coilcraft

Q1, Q2 pass transistors

npn transistor, hFE > 50

MPSW06

Internal

Reference

Adjustable

Delay

VREG11

VBB

Soft Start

V5D

VREG

COUT

ENB

VIN

CLADJ

VADJBD

VREG

CL33

V33BD

V33

VADJ

V5A

Short-to-Supply

Protection

5V Analog

Linear Regulator

and V5D to V5A

Tracking Control

5 V Digital Linear

Regulator

Current

Limiting

1.2 V to 3.3 V

Adjustable Linear

Regulator Control

3.3 V Linear

Regulator Control

CIN

Buck Converter with

Switching Regulator

High

Voltage

Switch

CP2

CP1

VCP

Charge Pump

C10

ENBAT

High V

Protection

VREG

VBB

REF

UVLOREG

UVLOADJ

UVLO33

NPOR

CPOR

NFAULT

POR Block

Fault

V5A Short to Supply

UVLO V5D, V5A

TSD Warning

GND

CPOK

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