TPS62740DSST

Features：

1 FEATURES

• Input Voltage Range VIN from 2.2V to 5.5V

• Typ. 360nA Quiescent Current

• Up to 90% Efficiency at 10µA Output Current

• Up to 300mA Output Current

• RF Friendly DCS-Control TM

• Up to 2 MHz Switching Frequency

• Low Output Ripple Voltage

• 16 Selectable Output Voltages in 100mV Steps between 1.8V to 3.3V

• Automatic Transition to No Ripple 100% Mode

• Slew Rate Controlled Load Switch

• Discharge Function on VOUT / LOAD

• Power Good Output

• Optimized for Operation with a Tiny 2.2µH Inductor and 10µF COUT

• Total Solution Size <31mm2 • Small 2 x 3 mm2 SON Package

2 APPLICATIONS

• Bluetooth® Low Energy, RF4CE, Zigbee

• Industrial Metering

• Energy Harvesting

3 DESCRIPTION

The TPS62740 is industry's first step down converter featuring typ. 360nA quiescent current and operating with a tiny 2.2µH inductor and 10µF output capacitor. This new DCS-ControlTM based device extends the light load efficiency range below 10µA load currents. It supports output currents up to 300mA. The device operates from rechargeable Li-Ion batteries, Liprimary battery chemistries such as Li-SOCl2, LiMnO2 and two or three cell alkaline batteries. The input voltage range up to 5.5V allows also operation from a USB port and thin-film solar modules. The output voltage is user selectable by four VSEL pins within a range from 1.8V to 3.3V in 100mV steps. TPS62740 features low output ripple voltage and low noise with a small output capacitor. Once the battery voltage comes close to the output voltage (close to100% duty cycle) the device enters no ripple 100% mode operation to prevent an increase of output ripple voltage. The device then stops switching and the output is connected to the input voltage. The integrated slew rate controlled load switch provides typ. 0.6Ω on-resistance and can distribute the selected output voltage to a temporarily used subsystem. The TPS62740 is available in a small 12 pin 2 × 3mm2 SON package and supports a total solutions size of 31mm2.

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