Texas Instruments TPS61322

Description

The TPS61322xx is a synchronous boost converterwith only 6.5-μA quiescent current. The TPS61322xxprovides a power-supply solution for productspowered by alkaline battery, NiMH rechargeablebattery, or one-cell Li-ion battery. The boost converteris based on a hysteretic control topology usingsynchronous rectification to obtain maximumefficiency at minimal quiescent current. TheTPS61322xx also allows the use of small externalinductor and capacitors. Higher than 90% efficiency isachieved at 10mA load from 1.5-V input to 2.2-Voutput conversion.The TPS61322xx can also support high outputcurrent applications with an external schottky diode.The TPS613222A provides higher than 500 mAoutput current capability at 3.0 V input voltage to 5.0V output voltage conversion with an external schottkydiode in parallel with the internal rectifier FET.The output voltage is set internally to a fixed outputvoltage from 1.8 V to 5.5 V in increment of 0.1 V.Thus it only needs two external components to getthe desired output voltage. The TPS61322xx alsoimplements thermal shutdown protection function.The TPS61322xx is available in a 2.9-mm × 1.3-mm3-pin SOT package or a 2.9-mm × 1.6-mm 5-pin SOTpackage.

Features

• Operating Input Voltage Range: 0.9 V to 5.5 V
• Output Voltage Range: 1.8 V to 5.5 V
• 6.5-μA Quiescent Current into VOUT Pin
• ±3% Output Voltage Accuracy over Temperature
• Minimum Switch Peak Current Limit: 0.42 A for TPS613223A 0.5 A for TPS61322 0.75 A for TPS613221A and TPS613226A 1.10 A for TPS613222A
• Higher than 90% Efficiency at 10 mA Load from
• 1.5-V to 2.2-V Conversion
• Thermal Shutdown Protection
• 2.9-mm x 1.3-mm 3-pin SOT Package and 2.9-
• mm x 1.6-mm 5-pin SOT Package

Typical applications

• Medical Equipment
• Portable Personal Electronics
• 1-cell to 3-cell Alkaline or NiMH Battery Powered Applications
• Gaming Control
• Tablet

More information

• Datasheet
• IC product information