TPS62745

ACTIVE

3.3V-10V input, 300mA Ultra Low Iq step-down converter with VSEL and input voltage switch

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Product details

Parameters

Vin (Min) (V) 3.3 Vin (Max) (V) 10 Vout (Min) (V) 1.8 Vout (Max) (V) 3.3 Iout (Max) (A) 0.3 Iq (Typ) (mA) 0.0004 Iq (Typ) (uA) 0.4 Switching frequency (Min) (kHz) 2500 Switching frequency (Max) (kHz) 2500 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Output Discharge, Power Good, Soft Start Fixed, Synchronous Rectification Operating temperature range (C) -40 to 125 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 3.3 V to 10 V
  • Typical 400 nA Quiescent Current
  • Up to 90% efficiency with load currents >15 µA
  • Up to 300 mA Output Current
  • RF Friendly DCS-Control™
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages from
    • 1.8 V to 3.3 V (TPS62745)
    • 1.3 V to 2.8 V (TPS627451)
  • Integrated input voltage switch
  • Integrated Discharge Function at VOUT
  • Open Drain Power Good Output
  • Operates with a Tiny 3.3 µH or 4.7 µH Inductor
  • Small 3 mm × 2 mm WSON Package
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Description

The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.

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Technical documentation

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Type Title Date
* Datasheet TPS62745 Dual-cell Ultra Low IQ Step Down Converter for Low Power Wireless Applications datasheet (Rev. A) Jun. 10, 2015
White papers Extending Battery Life in Smart E-Locks (Rev. A) Jun. 04, 2020
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 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
Technical articles Never lose your luggage again with a smart tracker design Oct. 20, 2017
Technical articles Power topology choices for power-hungry devices Aug. 09, 2017
Technical articles Increasing battery life in IoT devices May 05, 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
User guides TPS62745EVM-622 Evaluation Module User's Guide Jun. 11, 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 TPS62745EVM-622 is designed to help the user easily evaluate and test the operation and functionality of the TPS62745. The EVM converts a 3.3-V to 10-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 TPS62745 also includes an integrated input (...)

Features
  • Input Voltage Range VIN from 3.3V to 10V
  • Typ. 500nA Quiescent Current
  • Integrated input voltage switch
  • Up to 300mA Output Current
  • Up to 90% Efficiency with load currents >15µA

Design tools & simulation

SIMULATION MODELS Download
SLVMB11.ZIP (105 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
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
  • (...)

Reference designs

REFERENCE DESIGNS Download
Smart Lock Reference Design Enabling 5+ Years Battery Life on 4x AA Batteries
TIDA-00757 — With the increasing number of building and home owners looking to retrofit smart locks (or electronic locks) to their building or home, wireless battery powered smart locks are becoming increasingly popular in today’s market.  In a smart lock application, the high current motor and radio (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated power and data interface for low-power applications reference design
TIDA-010018 — This reference design provides power and data isolation for low and ultra-low power applications. Generating isolated and non-isolated power rails with a high efficiency and containing a power efficient isolated data interface for three forward- plus one reverse-direction channels. Targeted (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
MSP430FR2633 Microcontroller CapTIvate Electronic Lock and Keypad Reference Design
TIDM-CAPTIVATE-E-LOCK — This reference design demonstrates an ultra-low-power capacitive touch panel solution based on a single MSP430™ microcontroller (MCU) with CapTIvate™ technology. The use of self and mutual capacitance technology enables multifunctional capacitive touch panels (buttons, and proximity (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Battery-powered Data Collector for wM-Bus T-/C-mode & DSSS-coded Data Packets @ 868.95MHz Ref Design
TIDC-DSSS868WMBUS-DC The TIDC-DSSS868WMBUS-DC TI Design is a solution that enables Data Collectors with optimized firmware for receiving wireless M-Bus (wM-Bus) packets in frequent transmission (T-) and compact (C-) modes at 868.95MHz. For improved range a customized Direct Sequence Spread Spectrum (DSSS)-coded packet (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Smart Damper Control Reference Design With Pressure, Humidity, and Temperature Sensing
TIDA-01067 — This reference design is built to enable multiple room comfort control in connected HVAC systems. Sensing temperature, humidity, and pressure allows independent monitoring and air-flow adjustment in each zone. This TI Design converts a constant air volume (CAV) into a variable air volume (VAV (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSS) 12 View options

Ordering & quality

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