Wireless Charging ICs - Transmitters & Receivers
  • TS51111
  • High Efficiency Synchronous Rectifier and Charging IC for Wireless Power Applications
  • TS61001
  • Full-bridge FET Driver
  • TS61002
  • Full-bridge FET Driver
  • TS80000
  • High Efficiency Transmitter Controller for Wireless Power Systems
  • TS81000
  • High Efficiency Receiver Controller for Wireless Power Systems
  • TS81001
  • High Efficiency Receiver Controller for Wireless Power Systems
Semtech TS51221

Semtech TS51221

High Efficiency Regulator IC for Wireless Power Receiver Applications

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The TS51221 is a high-efficiency regulator device for low power wireless power receiver applications. The switching frequency of 1MHz enables the use of small filter components resulting in minimal board space and reduced BOM costs.


  • Fixed output voltage choices: 1.5V, 1.8V, 2.5V, 3.3V, and 5V with +/- 2% output tolerance
  • Adjustable version output voltage range: 0.9V to 5.5V with +/- 1.5% reference
  • Wide input voltage range: 4.5V to 24V
  • 1MHz +/- 10% fixed switching frequency
  • Input under voltage lockout
  • Full protection for over-current, over-temperature, and VOUT over-voltage
  • Low external component count


  • Wireless Charging for portable devices
  • Wear-ables, medical monitors
  • Bluetooth headsets
  • Smart watches


  • Packaged in a 16pin QFN (3x3)

Order Codes

  • TS51221-MvvvQFNR: RoHS compliant
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