TPS62742

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3V-5.5V input, 360-nA Iq step-down converter with 400mA and integrated load switch

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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 5.5 Vout (Min) (V) 1.8 Vout (Max) (V) 3.3 Iout (Max) (A) 0.4 Iq (Typ) (mA) 0.0003 Iq (Typ) (uA) 0.3 Switching frequency (Min) (kHz) 2000 Switching frequency (Max) (kHz) 2000 Features Light Load Efficiency, Output Discharge, Power Good, Synchronous Rectification, Adaptive/Dynamic Voltage Scaling Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WSON (DSS) 12 6 mm² 3 x 2 open-in-new Find other Buck converters (integrated switch)

Features

  • 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™
  • 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 × 3 mm2 WSON Package
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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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 11
Type Title Date
* Datasheet TPS6274x 360nA IQ Step Down Converter For Low Power Applications datasheet (Rev. B) Jul. 10, 2014
White papers Extending Battery Life in Smart E-Locks (Rev. A) Jun. 04, 2020
White papers Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
Application notes Methods of output-voltage adjustment for DC/DC converters Jun. 14, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018
Application notes A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Application notes Achieving a clean startup by using a DC/DC converter with a precise enable-pin t Oct. 24, 2017
Application notes Testing tips for applying external power to supply outputs without an input volt Oct. 24, 2016
Application notes Understanding frequency variation in the DCS-Control(TM) topology Oct. 30, 2015
Application notes Five steps to a great PCB layout for a step-down converter Jan. 29, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

The TPS62740EVM-186 is designed to help the user easily evaluate and test the operation and functionality of the TPS62740. The EVM converts a 2.2-V to 5.5-V input voltage to a regulated output voltage that is set between 1.8 V and 3.3 V at up to 300 mA. The TPS62740 also includes an integrated load (...)

Features
  • 360 nA  Iq
  • Integrated Load Switch
  • 2.2V to 5.5V Input Voltage Range
  • 300 mA Output Current

 

  • Related Terms:
    • Low Power Wireless
    • Ultra Low Power Wireless
    • Wireless Converter

Design tools & simulation

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
WSON (DSS) 12 View options

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