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SY21305ARDC (SY7215ARDC)

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High Efficiency, 15A Synchronous Step Up Regulator with Accurate Output Current Limit
Datasheet
SY21305ARDC High Efficiency, 15A Synchronous Step Up Regulator with Accurate Output Current Limit Datasheet
Part number SY21305ARDC
Vin (min) (V) 3
Vin (max) (V) 16
Current limit (A) 15
Switching frequency (min)(kHz) 250
Switching frequency (max)(kHz) 1000
Vout (min) (V) 3
Vout (max) (V) 16
Vref accuracy (±%) 1.5
Vout accuracy(±%)
Duty cycle (max)(%)
Iq (typ) (uA) 230
Features Power good,Disconnection FET
Package QFN4×4-18
Operating temperature range(°C) -40 to 125
Functional safety category
  • 3V to 16V Input Voltage Range 
  • Up to 15A Output Current
  • Programmable Output Current Limit
  • Low RDS(ON) for Internal N-Channel MOSFET: 9mΩ Main, 12mΩ Rectifier, 12mΩ Disconnection FET
  • Programmable Pseudoconstant Frequency
  • Enable Control
  • Input Voltage UVLO
  • Output Overvoltage Protection
  • Overtemperature Protection
  • Output Short-Circuit Protection
  • True Shutdown Function
  • RoHS-Compliant and Halogen-Free
  • Compact QFN4mm×4mm-18 Package

The SY21305A high efficiency synchronous stepup regulator operates using adaptive constant offtime and current mode control, and can deliver 15A current over a wide input voltage range from 3V to 16V. It integrates switches with low RDS(ON) to minimize conduction loss.

The SY21305A features cycle-by-cycle peak current limit, output short-circuit protection, and true shutdown. It also provides enable control and power-good indicator for system sequence control. The programmable pseudoconstant frequency reduces output voltage ripple and permits smaller external capacitors and inductor.

The SY21305A is available in a compact QFN4×4- 18 package.

Evaluation Board

  • SY21305ARDC-a

    Photo of evaluation board

  • SY21305ARDC-c

    Photo of evaluation board

  • SY21305ARDC-b

    Photo of evaluation board

EVB_SY21305ARDC_1

The EVB_SY21305ARDC_1 is intended for evaluating a high efficiency synchronous Boost regulator SY21305A which with programmable output current limit. The device adopts adaptive constant off time and current mode control. The integrated low RDS(ON) switches minimize the conduction loss.

Technical Documentation

Title Date
Silergy_Catalog_Q2_2026 2026-06-12

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