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RAA212831

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Product Longevity: 2033

72V 0.5A Step-Down Regulator with Two 5V and 3.3V LDO Outputs

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RAA212831 Datasheet

Overview

The RAA212831 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 can be set from 1.25V to VIN×Dmax. 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 is designed to provide a compact, highly integrated power management solution. Its integrated buck regulator and LDO outputs minimize system component count.

  • Buck Converter
    • 4.5V to 72V input voltage
    • Adjustable output voltage from 1.25V to VIN×Dmax
    • 500mA output load capability
    • 0.6Ω high-side MOSEFT rDS(ON)
    • Fixed switching frequency 350kHz in CCM operation
    • Pulse skipping mode in DCM operation
    • 6V standby function by external components
    • 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

Documentation

Featured Documentation
Type Title Date
Datasheet
RAA212831 Datasheet
PDF 3.26 MB
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Design & Development

RAA212831 Demonstration Board
Demonstration
RTKA212831DR0000BU Active

RAA212831 72V 0.5A Step-Down Regulator Demonstration Board

The RTKA212831DR0000BU provides a simple platform to demonstrate the performances of the RAA212831. The RAA212831 is an integrated 72V input voltage, 0.5A output load one synchronous buck regulator with fixed switching frequency from 350kHz and two 100mA, and 50mA output load linear regulators...

Recommended Documents:
RTKA212831DR0000BU Demonstration Board Manual
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