1 Features

1• Wide Input Voltage Range: 2 V to 15 V

• Up to 96% Efficiency

• Power Save Mode With 11-μA Quiescent Current

• Output Current 75 mA

• Output Voltage Range: 1.2 V to 5.5 V

• Up to 800-kHz Switch Frequency

• Synchronous Converter, No External Rectifier

• Low Output Ripple Voltage

• 100% Duty Cycle for Lowest Dropout

• Small SOT 8-Pin (TPS62120) and 2-mm × 2-mm

DFN 6-Pin (TPS62122) Package

• Internal Soft Start

• Power Good Open Drain Output (TPS62120)

• Open-Drain Output for Output Discharge

(TPS62120)

• 2.5-V Rising and 1.85-V Falling UVLO Thresholds

2 Applications

• Low Power RF Applications

• Ultra Low Power Microprocessors

• Energy Harvesting

• Industrial Measuring

3 Description

The TPS6212x device is a highly efficient

synchronous step-down DC-DC converter optimized

for low-power applications. The device supports up to

75-mA output current and allows the use of tiny

external inductors and capacitors.

The wide operating input voltage range of 2 V to 15 V

supports energy harvesting, battery powered and as

well 9-V or 12-V line powered applications.

With its advanced hysteretic control scheme, the

converter provides power save mode operation. At

light loads the converter operates in pulse frequency

modulation (PFM) mode and transitions automatically

in pulse width modulation (PWM) mode at higher load currents. The power save mode maintains high

efficiency over the entire load current range. The

hysteretic control scheme is optimized for low output

ripple voltage in PFM mode in order to reduce output

noise to a minimum. The device consumes only 10-

μA quiescent current from VIN in PFM mode

operation.

In shutdown mode, the device is turned off.

An open-drain power good output is available in the TPS62120 and indicates once the output voltage is in

regulation.

The TPS62120 has an additional SGND pin which is

connected to GND during shutdown mode. This output can be used to discharge the output capacitor.

The TPS6212x operates over an free air temperature

range of –40°C to 85°C. The TPS62120 is available

in a small 8-pin SOT-23 package and the TPS62122

in a 2 mm × 2 mm 6-pin DFN package.