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.