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A8498 Datasheet Wide Input Voltage 3.0A Step Down Regulator

Manufacturer: Allegro MicroSystems

General Description

The A8498 is a step-down regulator that will handle a wide input operating voltage range.

The A8498 is supplied in a low-profile 8-lead SOIC with exposed pad (package LJ).

Applications include: • Applications with 8 to 50 V input voltage range needing buck regulator for 3.0 A output current • Consumer equipment power • Uninterruptible power supplies (lead acid battery charger) • Automotive telematics: 9 to 16 V input, with higher voltage protection • 12 V lighter-powered applications (portable DVD, etc.) • Point of Sale (POS) applications • Industrial applications with 24 or 36 V bus Approximate Footprint CBOOT 0.01 µF BOOT VIN ENB LX A8498 RTSET 63.4 kΩ TSET GND VBIAS FB D1 +42 V CIN2 220 µF 50 V CIN1 0.22 µF L1 68 µH R1 6.34 kΩ R2 2 kΩ VOUT 3.3 V / 3 A ESR COUT 220 µF 25 V Efficiency % 90.0 88.0 86.0 84.0 82.0 80.0 78.0 76.0 74.0 72.0 70.0 0 Efficiency vs.

Overview

A8498 Wide Input Voltage 3.0 A Step-Down Regulator.

Key Features

  • 8 to 50 V input range.
  • Integrated DMOS switch.
  • Adjustable fixed off-time.
  • Highly efficient.
  • Adjustable 0.8 to 24 V output.