TPS62748

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High-efficiency Buck Converter with Ultra-low Quiescent Current and Load Switch

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Product details

Parameters

Vin (Min) (V) 2.15 Vin (Max) (V) 5.5 Vout (Min) (V) 1.2 Vout (Max) (V) 1.8 Iout (Max) (A) 0.3 Iq (Typ) (mA) 0.00036 Iq (Typ) (uA) 0.36 Switching frequency (Min) (kHz) 1200 Switching frequency (Max) (kHz) 1200 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Output Discharge, 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

DSBGA (YFP) 8 0 mm² 1.602 x .906 open-in-new Find other Buck converters (integrated switch)

Features

  • Input Voltage Range VIN from 2.15 V to 5.5 V
  • Input Voltage Range Down to 2.0 V Once Started
  • 300 mA Output Current
  • 360 nA Operational Quiescent Current
  • Up to 90% Efficiency at 10-µA Output Current
  • Power Save Mode Operation
  • Selectable Output Voltages
    • 1.2 V and 1.8 V
  • Output Voltage Discharge
  • 100 mA/2.2 Ω Integrated Load Switch
  • Low Output Voltage Ripple
  • Automatic Transition to No Ripple 100% Mode
  • RF Friendly DCS-Control™
  • Total Solution Size <10mm2
  • Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package

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Description

The TPS62748 is a high efficiency step down converter with ultra low quiescent current of typical 360 nA. The device is optimized to operate with a 2.2-µH inductor and 10µF output capacitor. The device uses DCS-Control™ and operates with a typical switching frequency of 1.2 MHz. In Power Save Mode the device extends the light load efficiency down to a load current range of 10-µA and below. TPS62748 provides an output current of 300 mA. Once started the device operates down to an input voltage range of 2.0 V. This allows to operate the device directly from a single Li-MnO2 coin cell.

The TPS62748 provides two programmable output voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62748 is optimized to provide a low output voltage ripple and low noise using a small output capacitor. Once the input voltage comes close to the output voltage the device enters the No Ripple 100% mode to prevent an increase of output ripple voltage. In this operation mode the device stops switching and turns the high side MOSFET switch on.

The TPS62748 has a 100 mA load switch between pins VOS and LOAD with a typical ON-resistance of 0.6 Ohm. The load switch is typically used to distribute the buck converter output voltage to the sub-system.

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Technical documentation

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Type Title Date
* Datasheet TPS62748 300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current and Load Switch datasheet (Rev. A) Oct. 20, 2015
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
Technical articles Do all rails need low Iq? Jul. 15, 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

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 TPS62748EVM-706 is designed to help the user easily evaluate and test the operation and functionality of the TPS62748. The EVM converts a 2.0-V to 5.5-V input voltage to a regulated output voltage that is set to either 1.2 V or 1.8 V at up to 300 mA. The TPS62748 has an integrated VOUT switch (...)

Features

  • 360nA Typical Quiescent Current
  • Up to 90% Efficiency at 10uA Output Current
  • RF Friendly DCS-Control
  • Total Sulution Size  <11mm²
  • Small 1.6 x 0.9 mm², 0.5mm Hight, 8 Ball, 0.4mm Pitch WCSP Package

Design tools & simulation

SIMULATION MODELS Download
SLVMBA6.ZIP (108 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
  • (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YFP) 8 View options

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