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 V_OUT 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.

Features

• 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 V_IN = 3.6V, V_OUT = 5V and I_OUT = 1.5A
• 1MHz Switching frequency when V_IN > 1.5V and 0.5MHz switching frequency when V_IN < 1V
• Typical 0.1µA shutdown current from V_IN and SW
• ±2.5% Reference voltage accuracy over -40°C to +125°C
• Auto PFM operation mode at light load
• Pass-through mode when V_IN > V_OUT
• 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

more information: https://www.ti.com/product/TPS61023

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