A8499| Datasheet

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A8499 High Voltage Step-Down Regulator
Features and Benefits
8 to 50 V input range Integrated DMOS switch Adjustable fixed off-time Highly efficient Adjustable 1.2 to 24 V output

Description
The A8499 is a step down regulator that will handle a wide input operating voltage range. The A8499 is supplied in a low-profile 8-lead SOIC with exposed pad (package LJ). Applications include: Printer power supplies Consumer equipment power supplies

Package: 8-Lead SOIC with exposed thermal pad (suffix LJ)

Approximate Scale 1:1

Typical Application

+42 V

Efficiency vs. Output Current
CBOOT 0.01 F C3 100 F 50 V BOOT VIN C3 0.22 F

ENB

LX

A8499
TSET
RTSET

L1 47 H

VOUT 3.3 V / 1.2 A

VBIAS R1 17.8 k

121 k GND FB D1

ESR R2 10.2 k COUT 220 F 10 V

90.0 88.0 86.0 84.0 82.0 80.0 78.0 76.0 74.0 72.0 70.0 0 200 400 600 800 1000

Efficiency %

VOUT (V) 3.3 5 1200 1400

IOUT (mA)

Circuit for 42 V step down to 3.3 V at 1.2 A. Efficiency data from circuit shown in left panel.Data is for reference only.
A8499-DS, Rev. 3

A8499 Datasheet allegro Download PDF

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A8499 DATASHEET