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TPS6274x Step-Down Buck DC/DC Converters

Texas Instruments' TPS6274x ultra-low-power 300 mA step-down buck DC/DC converters with a 360 nA Iq

Image of Texas Instruments' TPS6274x Step-Down Buck DC/DC ConvertersTexas Instruments' TPS6274x devices are the industry’s first step-down converters featuring typical 360 nA quiescent current and operating with a tiny 2.2 µH inductor and 10µF output capacitor. These DCS-Control™ based devices extend the light load efficiency range below 10 µA load currents. The TPS62740 supports output currents up to 300 mA; TPS62742 up to 400 mA. These devices operate 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 5.5 V also allows operation from a USB port and thin-film solar modules. The output voltage is user selectable by four VSEL pins within a range from 1.8 V to 3.3 V in 100 mV steps. The TPS6274x step-down buck DC/DC converters feature 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 devices enter no ripple 100% mode operation to prevent an increase of output ripple voltage. These devices then stop switching and the output is connected to the input voltage. The integrated slew rate controlled load switch provides typical 0.6 Ω on-resistance and can distribute the selected output voltage to a temporarily used sub-system. The TPS6274x devices are available in a small 12-pin 2 mm2 x 3 mm2 WSON package and supports a total solution size of 31 mm2.

Features
  • Input voltage range VIN from 2.2 V to 5.5 V
  • Typical 360 nA quiescent current
  • Up to 90% efficiency at 10 µA output current
  • Up to 300 mA/400 mA output current (TPS62740/TPS62742)
  • RF friendly DCS-Control™
  • Up to 2 MHz switching frequency
  • Low output ripple voltage
  • 16 selectable output voltages in 100 mV steps between 1.8 V to 3.3 V

Applications

  • Bluetooth® Low Energy, RF4CE, Zigbee®
  • Industrial metering
  • Energy harvesting
  • 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 2.2 µH inductor and 10 µF COUT
  • Total solution size <31 mm2
  • Small 2 mm2 x 3 mm2 WSON package

TPS6274x Step-Down Buck DC/DC Converters

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC REG CONV BLUETTH 1OUT 12WSONTPS62740DSSTIC REG CONV BLUETTH 1OUT 12WSON5661 - ImmediateView Details
IC REG CONV BLUETTH 1OUT 12WSONTPS62742DSSTIC REG CONV BLUETTH 1OUT 12WSON853 - ImmediateView Details
IC REG CONV BLUETTH 1OUT 12WSONTPS62740DSSRIC REG CONV BLUETTH 1OUT 12WSON14772 - ImmediateView Details
IC REG CONV BLUETTH 1OUT 12WSONTPS62742DSSRIC REG CONV BLUETTH 1OUT 12WSON44333 - ImmediateView Details

Evaluation Board

ImageManufacturer Part NumberDescriptionMain PurposeOutputs and TypeVoltage - OutputAvailable QuantityView Details
EVAL BOARD FOR TPS62740TPS62740EVM-186EVAL BOARD FOR TPS62740DC/DC, Step Down1, Non-Isolated1.8V ~ 3.3V8 - ImmediateView Details
Published: 2018-04-17