6-uA Quiescent Current, 1.8-A Switch Current Boost Converter

The TPS61322 is a synchronous boost

converter with only 6.5-µA quiescent current. The TPS61322 provides a power-supply

solution for products powered by alkaline battery, NiMH rechargeable battery, or

one-cell Li-ion battery. The boost converter is based on a hysteretic control

topology using synchronous rectification to obtain maximum efficiency at minimal

quiescent current. The TPS61322 also allows the use of small external inductor and

capacitors. Higher than 90% efficiency is achieved at 10-mA load from 1.5-V input to

2.2-V output conversion.

The TPS61322 can also support high

output current applications with an external schottky diode. The TPS613222A provides

higher than 500-mA output current capability at 3-V input voltage to 5-V output

voltage conversion with an external Schottky diode in parallel with the internal

rectifier FET.

The output voltage is set internally

to a fixed output voltage from 1.8 V to 5.5 V in increments of 0.1 V. Thus, it only

needs two external components to get the desired output voltage. The TPS61322 also

implements thermal shutdown protection function.

The TPS61322 is available in a 2.9-mm

× 1.3-mm 3-pin SOT package or a 2.9-mm × 1.6-mm 5-pin SOT package.