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Product details

Parameters

Iout (Max) (A) 0.2 Vin (Min) (V) 2.2 Vin (Max) (V) 5.5 Vout (Min) (V) 1.8 Vout (Max) (V) 2.5 Soft start Fixed Features Enable, Light Load Efficiency, Output Discharge Operating temperature range (C) -40 to 85 Iq (Typ) (uA) 0.36 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1700 Switching frequency (Min) (kHz) 700 Switching frequency (Typ) (kHz) 1200 Duty cycle (Max) (%) 100 Topology Buck, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Features

  • 360-nA Typical Quiescent Current
  • Up to 90% Efficiency at 10-µA Output Current
  • Pin-Selectable Output Voltages in 100-mV Steps
  • Integrated Slew Rate Controlled Load Switch
  • Up to 200-mA Output Current
  • Input Voltage Range VIN from 2.2 V to 5.5 V
  • RF Friendly DCS-Control™
  • Low Output Voltage Ripple
  • Automatic Transition to No Ripple 100% Mode
  • Discharge Function on VOUT and LOAD
  • Sub 1.1-mm Profile Solution
  • Total Solution Size < 6.7mm2
  • Small 2.3 mm × 2.9 mm MicroSIP™ Package

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Description

The TPS82740 is the industry’s first step-down converter module featuring typically 360-nA quiescent current consumption. It is a complete MicroSIPTM DC/DC step-down power solution intended for ultra low-power applications. The module includes the switching regulator, inductor and input/output capacitors. The integration of all required passive components enables a tiny solution size of only 6.7 mm2.

This new DCS-Control™ based device extends the light load efficiency range below 10-µA load currents. It supports output currents up to 200 mA.

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 5.5 V also allows operation from an USB port and thin-film solar modules.

The output voltage is user selectable by three voltage select pins (VSEL), within a range from 1.8 V to 2.5 V (TPS82740A) and 2.6 V to 3.3 V (TPS82740B) in 100-mV steps. The TPS82740 features low output voltage ripple and low noise. Once the battery voltage comes close to the output voltage (close to 100% duty cycle), the device enters no ripple 100% mode operation preventing an increase of output voltage ripple. In this case the device stops switching and the output is connected to the input voltage.

The integrated slew rate controlled load switch with a typical ON-resistance of 0.6Ω distributes the selected output voltage to a temporarily used sub-system.

The TPS82740 is available in a small 9-bump 6.7 mm2 MicroSiP™ package.

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Technical documentation

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Type Title Date
* Datasheet TPS82740x 360-nA IQ MicroSIPTM Step Down Converter Module for Low Power Applications datasheet (Rev. A) Jun. 11, 2014
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
Application note Methods of output-voltage adjustment for DC/DC converters Jun. 14, 2019
Application note Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018
Application note A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Application note Testing tips for applying external power to supply outputs without an input volt Oct. 24, 2016
White paper SiP Power Modules White Paper Jan. 26, 2016
Application note Understanding frequency variation in the DCS-Control(TM) topology Oct. 30, 2015
Technical articles Extend your wearable design’s battery runtime with an ultra-low-power solution Apr. 06, 2015
Technical articles Tips for making your battery solution more compact Feb. 27, 2015
Technical articles 3 Keys to Ultra-Low-Power in Wearable Designs Sep. 05, 2014
User guide TPS82740xSIPEVM-617 User's Guide Jun. 10, 2014
Application note High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions Jul. 25, 2013
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
User guide MicroSiP™ Design Guide Feb. 22, 2011

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

The TPS82740AEVM-617 is designed to help the user easily evaluate and test the operation and functionality of the Fully Integrated TPS82740A Power Module. 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 2.5 V at up to 200 mA. The (...)

Features
  • 360 nA Iq
  • Integrated Load Switch
  • 2.2V to 5.5V Input Voltage Range
  • 200mA Output Current
  • Fully Integrated MicroSIP™ Module

Design tools & simulation

SIMULATION MODEL Download
SLVMAB2C.ZIP (127 KB) - PSpice Model
SIMULATION MODEL Download
SLVMAI1A.TSC (122 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVMAI2A.TSC (128 KB) - TINA-TI Reference Design
SIMULATION TOOL 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
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
(SIP) 9 View options

Ordering & quality

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  • Ongoing reliability monitoring

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