TPS62742DSSRG4.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Input Voltage Range VIN from 2.2V to 5.5

• Typ. 360nA Quiescent Current

• Up to 90% Efficiency at 10μA Output Current

• Up to 300mA / 400mA Output Current

(TPS62740/TPS62742)

• 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 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. 360nA 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 300mA,

TPS62742 up to 400mA. The device operates from

rechargeable Li-Ion batteries, Li-primary battery

chemistries such as Li-SOCl2, Li-MnO2 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. TPS6274x features low

output ripple voltage and low noise with a small

output capacitor. Once the battery voltage comes

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 on-

resistance 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 a total solutions size of

31mm2.