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SY21153AAIC (SY8303AAIC)

Production
High Efficiency Fast Response, 3A, 40V Input Synchronous Step Down Regulator
Datasheet
SY21153AAIC High Efficiency Fast Response, 3A, 40V Input Synchronous Step Down Regulator Datasheet
Part number SY21153AAIC
Channel(#) 1
Vin (min) (V) 4.5
Vin (max) (V) 40
Switching frequency (min)(kHz) 500
Switching frequency (max)(kHz) 2500
Vout (min) (V) 0.6
Vout (max) (V) 24
Iout (max) (A) 3
Vout2 (min)(V)
Vout2 (max )(V)
Iout2 (max)(A)
Vref accuracy (±%) 1.5
Vout accuracy(±%)
Control mode Clock+Ipeak
Duty cycle (max)(%) 80
Operation mode Auto PFM
Iq (typ) (uA) 19
Features
Package TSOT23-8
Operating temperature range(°C) -40 to 125
Functional safety category
  • Low RDS(ON) for Internal Switches (Top/Bottom): 110/70 mΩ
  • 4.5-40V Input Voltage Range
  • Internal Compensation
  • Internal 1ms Soft-start Limits the Inrush Current
  • Adjustable Switching Frequency Range: 500kHz to 2.5MHz
  • 3A Output Current Capability
  • 1.5% 0.6V Reference
  • Low Quiescent Current
  • Cycle-by-cycle Peak Current Limitation
  • Short Circuit Protection
  • Thermal Shutdown and Auto Recovery
  • RoHS Compliant and Halogen Free
  • Compact Package: TSOT23-8

 

Evaluation Board

  • 21153A-1

    Photo of evaluation board

  • 21153A-2

    Photo of evaluation board

  • 21153A-3

    Photo of evaluation board

EVB_SY21153AAIC

The EVB_SY21153AAIC is intended for evaluating fast response, 3A, 40V synchronous Buck regulator. It features Enable control, output voltage selection inputs.

Design resources

Online Simulation

Technical Documentation

Title Date
Silergy_Catalog_Q2_2026 2026-06-12