TPS62120

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15V, 75mA, 96% efficiency Step-Down Converter with DCS-Control

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Product details

Parameters

Vin (Min) (V) 2 Vin (Max) (V) 15 Vout (Min) (V) 1.2 Vout (Max) (V) 5.5 Iout (Max) (A) 0.075 Iq (Typ) (mA) 0.011 Switching frequency (Min) (kHz) 800 Switching frequency (Max) (kHz) 800 Features Enable, Light Load Efficiency, Output Discharge, Power Good, Synchronous Rectification Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

SOT-23 (DCN) 8 8 mm² 2.9 x 2.8 open-in-new Find other Buck converters (integrated switch)

Features

  • Wide Input Voltage Range: 2 V to 15 V
  • Up to 96% Efficiency
  • Power Save Mode With 11-µA Quiescent Current
  • Output Current 75 mA
  • Output Voltage Range: 1.2 V to 5.5 V
  • Up to 800-kHz Switch Frequency
  • Synchronous Converter, No External Rectifier
  • Low Output Ripple Voltage
  • 100% Duty Cycle for Lowest Dropout
  • Small SOT 8-Pin (TPS62120) and 2-mm × 2-mm
    DFN 6-Pin (TPS62122) Package
  • Internal Soft Start
  • Power Good Open Drain Output (TPS62120)
  • Open-Drain Output for Output Discharge
    (TPS62120)
  • 2.5-V Rising and 1.85-V Falling UVLO Thresholds
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Description

The TPS6212x device is a highly efficient synchronous step-down DC-DC converter optimized for low-power applications. The device supports up to 75-mA output current and allows the use of tiny external inductors and capacitors.

The wide operating input voltage range of 2 V to 15 V supports energy harvesting, battery powered and as well 9-V or 12-V line powered applications.

With its advanced hysteretic control scheme, the converter provides power save mode operation. At light loads the converter operates in pulse frequency modulation (PFM) mode and transitions automatically in pulse width modulation (PWM) mode at higher load currents. The power save mode maintains high efficiency over the entire load current range. The hysteretic control scheme is optimized for low output ripple voltage in PFM mode in order to reduce output noise to a minimum. The device consumes only 10-µA quiescent current from VIN in PFM mode operation.

In shutdown mode, the device is turned off.

An open-drain power good output is available in the TPS62120 and indicates once the output voltage is in regulation.

The TPS62120 has an additional SGND pin which is connected to GND during shutdown mode. This output can be used to discharge the output capacitor.

The TPS6212x operates over an free air temperature range of –40°C to 85°C. The TPS62120 is available in a small 8-pin SOT-23 package and the TPS62122 in a 2 mm × 2 mm 6-pin DFN package.

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Technical documentation

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Type Title Date
* Datasheet TPS6212x 15-V, 75-mA Highly Efficient Buck Converter datasheet (Rev. A) Jul. 31, 2015
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
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 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
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 Extending the Soft Start Time Without a Soft Start Pin (Rev. B) Jun. 15, 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 Basic Calculation of a Buck Converter's Power Stage (Rev. B) Aug. 17, 2015
Application notes Five steps to a great PCB layout for a step-down converter Jan. 29, 2015
Technical articles Efficiently Power that Op Amp Jul. 17, 2014
Technical articles Discharge that output rail? May 16, 2014
Technical articles Invert your biased voltage Oct. 26, 2013
Application notes Using the TPS62120 in an Inverting Buck-Boost Topology (Rev. B) Oct. 01, 2013
Application notes High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions Jul. 25, 2013
Application notes How to Measure the Control Loop of DCS-Control Devices (Rev. A) Aug. 09, 2012
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
White papers Power Management Solutions for Ultra-Low-Power 16-Bit MSP430 MCUs (Rev. D) Mar. 28, 2012
Application notes Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) Jan. 13, 2012
Application notes Powering the MSP430 from a High Voltage Input using the TPS62122 (Rev. C) Jan. 12, 2012
Application notes Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep. 19, 2011
Application notes IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
User guides TPS62120, TPS62120EVM Sep. 21, 2010

Design & development

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

Hardware development

EVALUATION BOARDS Download
TPS62120 Evaluation Module
TPS62120EVM-640
document-generic User guide
$49.00
Description

The TPS62120EVM-640 is a fully assembled and tested platform for evaluating the operation and performance of the TPS62120 converter. The TPS62120EVM-640 has an input voltage range from 2.0 V up to 15 V, and the output voltage is adjustable with an external feedback divider network in the range of (...)

Features
  • High input voltage range: 2.0 V up to 15 V
  • Adjustable output voltage: 1.2 V up to 5.5 V
  • Up to 75-mA output current
  • Up to 800-kHz switching frequency

Design tools & simulation

SIMULATION MODELS Download
SLIM216.ZIP (49 KB) - PSpice Model
SIMULATION MODELS Download
SLVM146.TSC (864 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM147.ZIP (46 KB) - TINA-TI Spice Model
GERBER FILES Download
SLVC780.ZIP (138 KB)

Reference designs

REFERENCE DESIGNS Download
12VDC Input, Hybrid Memory Cube (HMC) Gen. 2 Power Supply Reference Design
PMP20080 — The PMP20080 is a powerful design intended to operate 5 output rails with application to a Hybrid Memory Cube (HMC) Gen2. This design uses 5 synchronous bucks with multiple different controllers to allow for a well regulated set of outputs. Also, PMP20080 allows for the configurability that comes (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated Flyback, Bucks (5V@1.5A) for Consumer Applications
PMP5539 — This reference design is a multi-output isolated flyback, working from universal line. The main regulated output is 9.6V; it supplies the main load @ 400mA and two further outputs by means of low power buck converters. The converter takes advantage of the cascode-flyback topology and quasi-resonant (...)
REFERENCE DESIGNS Download
Small, Simple, and Efficient Voltage Inverter for Op Amp Biasing Reference Design
PMP9752 In this reference design, the TPS62120 provides a small, simple, and efficient voltage inverting circuit to be used for low power negative voltage rails, such as biasing an op amp.  This configuration has been tested with a full test report and operation explanation.
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DCN) 8 View options

Ordering & quality

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