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TPS62122

ACTIVE

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

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Data sheet

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TPS629203 ACTIVE 3-V to 17-V, 0.3-A, low-IQ, synchronous buck converter in SOT-583 package Improved efficiency, smaller size and lower IQ.

TPS62122

ACTIVE
Data sheet Order now

Product details

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, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Constant on-time (COT), DCS-Control Duty cycle (max) (%) 100 Type Converter
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, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Constant on-time (COT), DCS-Control Duty cycle (max) (%) 100 Type Converter
WSON (DRV) 6 4 mm² 2 x 2
  • 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
  • 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

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.

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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TPS62120 ACTIVE 15V, 75mA, 96% efficiency Step-Down Converter with DCS-Control Same product with PG pin in a different package.

Technical documentation

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Type Title Date
* Data sheet TPS6212x 15-V, 75-mA Highly Efficient Buck Converter datasheet (Rev. A) PDF | HTML 31 Jul 2015
Application note Using the TPS62120 in an Inverting Buck-Boost Topology (Rev. C) PDF | HTML 29 Nov 2022
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 May 2022
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Application note QFN and SON PCB Attachment (Rev. B) PDF | HTML 24 Aug 2018
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin t 24 Oct 2017
Application note Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15 Jun 2017
Technical article Cutting the last wire to unleash Industry 4.0 27 Oct 2016
Analog Design Journal Testing tips for applying external power to supply outputs without an input volt 24 Oct 2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30 Oct 2015
Application note Basic Calculation of a Buck Converter's Power Stage (Rev. B) 17 Aug 2015
Analog Design Journal Five steps to a great PCB layout for a step-down converter 29 Jan 2015
Technical article Efficiently Power that Op Amp 18 Jul 2014
Technical article Driving MSP430 low-power even lower - Part Two 15 Apr 2014
Analog Design Journal High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions 25 Jul 2013
Application note How to Measure the Control Loop of DCS-Control Devices (Rev. A) 09 Aug 2012
Analog Design Journal Design considerations for a resistive feedback divider in a DC/DC converter 26 Apr 2012
Application note Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) 13 Jan 2012
Application note Powering the MSP430 from a High Voltage Input using the TPS62122 (Rev. C) 12 Jan 2012
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011
EVM User's guide TPS62122EVM User's Guide 01 Sep 2010

Design & development

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

Evaluation board

TPS62122EVM-586 — TPS62122 Evaluation Module

The TPS62122EVM-586 is a fully assembled and tested platform for evaluating the operation and performance of the TPS62122 converter. The TPS62122EVM-586 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 (...)

User guide: PDF
Not available on TI.com
Simulation model

TPS62122 PSpice Unencrypted Transient Model (Rev. B)

SLIM217B.ZIP (218 KB) - PSpice Model
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Simulation model

TPS62122 TINA-TI Transient Reference Design

SLVM314.TSC (862 KB) - TINA-TI Reference Design
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Simulation model

TPS62122 TINA-TI Transient Spice Model

SLVM315.ZIP (44 KB) - TINA-TI Spice Model
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Calculation tool

Design Tool for Output Voltage Adjustment Using a DAC

SLVC780.ZIP (138 KB)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Reference designs

PMP9752 — Small, Simple, and Efficient Voltage Inverter for Op Amp Biasing Reference Design

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.
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00690 — Energy Harvesting for Wireless Switch Power Reference Design

The TIDA-00690 reference design  offers a solution for energy harvesting switch. The switch, built like a linear dynamo, transforms the mechanical energy into electrical energy. This electrical energy is harvested in an optimal manner, thanks to the TIDA-00690 design. The design allows (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
WSON (DRV) 6 View options
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