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reference designRAA230409

Renesas RAA230409

3-ch Step-Down Switching Regulator + 1-ch LDO

Overview

TopologyBuck Converter
Input voltage2.5-5.5 V
Switching frequency1300-2000 kHz
Output 13 V / 0.5 A
Output 22.5 V / 0.5 A
Output 31.8 V / 0.5 A
Output 43.3 V / 0.5 A
IC revision1.02

Description

The RAA23040x is a power supply IC that has 3-ch step-down Switching Regulator containing power MOSFETs and 1-ch LDO.

Features

  • Switching Regulator (ch1, ch3, ch4)
  • ¾ Synchronous rectification type step-down circuit
  • ¾ Integrated power MOSFETs
  • ¾ Internal phase compensator
  • ¾ Power good function (ch1)
  • ¾ Low power mode
  • (ch1, ch3 and ch4 operate at low frequency and reduce the power consumption of the IC.)
  • ¾ Switching frequency: 1.3 MHz to 2 MHz (variable)
  • ¾ Internal timer-latch-type short-circuit protector
    • LDO (ch2)
  • ¾ Internal over current protector (foldback-current limiting)
    • Common part
  • ¾ Independent On/Off control for each channel
  • ¾ Internal digital soft-start function (adjustable soft-start time)
  • ¾ Internal discharge circuit
  • ¾ Internal timer-latch-type thermal shutdown circuit (shutdown temperature: 150°C or higher)
  • ¾ Internal recovery-type under voltage lockout circuit

More information

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L(µH)
IR(A)
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744028004
SPECWE-TPC SMT Tiny Power Inductor, 4.7 µH, 0.85 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TPC SMT Tiny Power Inductor
Inductance4.7 µH
Rated Current0.85 A
Saturation Current0.7 A
Self Resonant Frequency70 MHz
MountSMT 
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