TPS61023 – 3.7-A boost converter with 0.5-V ultra-low input voltage

TPS61023 – 3.7-A boost converter with 0.5-V ultra-low input voltage

TPS61023 device is a synchronous boost converter with 0.5-V ultra-low input voltage. The device provides a power supply solution for portable equipment and smart devices powered by various batteries and super capacitors. The TPS61023 has typical 3.7-A valley switch current limit over full temperature range. With a wide input voltage range of 0.5 V to 5.5 V, the TPS61023 supports super capacitor backup power applications, which may deeply discharge the super capacitor.

The TPS61023 operates at 1-MHz switching frequency when the input voltage is above 1.5 V. The switching frequency decreases gradually to 0.5 MHz when the input voltage is below 1.5 V down to 1 V. The TPS61023 enters power-save mode at light load condition to maintain high efficiency over the entire load current range. The TPS61023 consumes a 20-µA quiescent current from VOUT in light load condition. During shutdown, the TPS61023 is completely disconnected from the input power and only consumes a 0.1-µA current to achieve long battery life. The TPS61023 has 5.7-V output overvoltage protection, output short circuit protection, and thermal shutdown protection.

The TPS61023 offers a very small solution size with 1.2-mm × 1.6-mm SOT563 (DRL) package and minimum amount of external components.


  • Input voltage range: 0.5V to 5.5V
  • 1.8V Minimum input voltage for start-up
  • Output voltage setting range: 2.2V to 5.5V
  • Two 47mΩ (LS) / 68mΩ (HS) MOSFETs
  • 3.7A Valley switching current limit
  • 94% Efficiency at VIN = 3.6V, VOUT = 5V and IOUT = 1.5A
  • 1MHz Switching frequency when VIN > 1.5V and 0.5MHz switching frequency when VIN < 1V
  • Typical 0.1µA shutdown current from VIN and SW
  • ±2.5% Reference voltage accuracy over -40°C to +125°C
  • Auto PFM operation mode at light load
  • Pass-through mode when VIN > VOUT
  • True disconnection between input and output during shutdown
  • Output overvoltage and thermal shutdown protection
  • Output short-circuit protection
  • 1.2mm × 1.6mm SOT563 (DRL) 6-pin package

Block Diagram

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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