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Overview

Description

The RAA212832 is a triple output regulator combining a 4.5V to 72V input, 0.5A buck regulator with two LDO outputs. The buck regulator has a fixed switching frequency of 350kHz in Continuous Conduction mode (CCM) and operates in Pulse Skipping mode at lighter loads when it enters Discontinuous Conduction mode (DCM). The two LDOs operate from a 12V (or lower) input voltage. The LDOs are rated at 100mA and 50mA of output current. The buck regulator output is fixed at either 6V or 12V, which is controlled by the STBY pin. The LDOs can support an input voltage range of 6V to 12V and the output voltages are fixed at 3.3V and 5V. The IC provides a compact, highly integrated power management solution. Its integrated buck regulator and LDO outputs minimize system component count.

Features

  • Buck Converter
    • 4.5V to 72V input voltage
    • Fixed output voltage 12V or 6V
    • 500mA output load capability
    • 0.6Ω high-side MOSEFT rDS(ON)
    • Fixed switching frequency 350kHz in CCM operation
    • Pulse skipping mode in DCM operation
    • Standby function by STBY pin setting output voltage
    • High-side OCP, UVP, UVLO, OTP fault protection
  • 5V LDO Regulator
    • 6V to 12V input voltage
    • Fixed output voltage 5V
    • 100mA output load capability
    • Current limit foldback function
  • 3.3V LDO Regulator
    • 4.5V to 12V input voltage
    • Fixed output voltage 3.3V
    • 50mA output load capability
    • Current limit foldback function
    • SOIC8-E package

Comparison

Applications

  • Electric-bike power management
  • Motor driver control board power supply

Documentation

Type Title Date
Datasheet PDF 3.29 MB
1 item

Design & Development

Boards & Kits

Models

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Diagram of ECAD Models