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.