TPS62740 Datasheet | Texas Instruments

ures - 1 Input Voltage Range VIN from 2.2V to 5.5 - Typ. 360n A Quiescent Current - Up to 90% Efficiency at 10µA Output Current - Up to 300m A / 400m A Output Current (TPS62740/TPS62742) - RF Friendly DCS-Control TM - Up to 2 MHz Switching Frequency - Low Output Ripple Voltage - 16 Selectable Output Voltages in 100m V 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 WSON Package 2 Applications - Bluetooth® Low Energy, RF4CE, Zigbee - Industrial Metering - Energy Harvesting 3 Description The TPS6274x is industry's first step down converter featuring typ. 360n A quiescent current and operating with a tiny 2.2µH inductor and 10µF output capacitor. This new DCS-Control™ based device extends the light load efficiency range below 10µA load currents. TPS62740 supports output currents up to 300m A, TPS62742 up to 400m A. The device operates from rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-Mn O2 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 100m V steps. TPS6274x Features low output ripple voltage and low noise with a small output capacitor. Once the battery voltage es close to the output voltage (close to 100% 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 onresistance and can distribute the selected output voltage to a temporarily used sub-system. The TPS6274x is available in a small 12 pin 2 × 3mm2 WSON package and supports...