TPS62120DCNR 3.3V 1.5A Step-Down Converter with 95% Efficiency 3.1-17V Input Power Save Mode 100% Duty Cycle Internal Compensation Soft Start and Thermal Shutdown in SOT-23 Package

TPS62120DCNR 3.3V 1.5A Step-Down Converter with 95% Efficiency 3.1-17V Input Power Save Mode 100% Duty Cycle Internal Compensation Soft Start and Thermal Shutdown in SOT-23 Package

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Features

andbull; Wide Input Voltage Range: 2 V to 15 V 1

andbull; Upto96%Efficiency

andbull; Power Save Mode With 11-andmicro;A Quiescent Current

andbull; Output Current 75 mA

andbull; Output Voltage Range: 1.2 V to 5.5 V

andbull; Upto800-kHz Switch Frequency

andbull; Synchronous Converter, No External Rectifier

andbull; LowOutput Ripple Voltage

andbull; 100%Duty Cycle for Lowest Dropout

andbull; Small SOT 8-Pin (TPS62120) and 2-mm andtimes; 2-mm DFN 6-Pin (TPS62122) Package

andbull; Internal Soft Start

andbull; Power Good Open Drain Output (TPS62120)

andbull; Open-Drain Output for Output Discharge (TPS62120)

andbull; 2.5-V Rising and 1.85-V Falling UVLO Thresholds

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Applications

andbull; LowPower RF Applications

andbull; Ultra Low Power Microprocessors

andbull; Energy Harvesting

andbull; Industrial Measuring

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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 andmicro;A 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 ofandndash;40anddeg;C to 85anddeg;C. The TPS62120 is available in a small 8-pin SOT-23 package and the TPS62122 in a 2 mmandtimes; 2mm6-pin DFN package.

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INFORMATION

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Drawing

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