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TPS62125

ACTIVE

3V-17V, 300mA Buck Converter With Adjustable Enable Threshold And Hysteresis

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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 Next-generation device in smaller SOT583 package with lower IQ and higher switching frequency.

TPS62125

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 0.3 Vin (min) (V) 3 Vin (max) (V) 17 Switching frequency (min) (kHz) 1000 Switching frequency (max) (kHz) 1000 Features Enable, Light Load Efficiency, Output discharge, Power good, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT), DCS-Control Vout (min) (V) 1.2 Vout (max) (V) 10 Iq (typ) (µA) 13 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 0.3 Vin (min) (V) 3 Vin (max) (V) 17 Switching frequency (min) (kHz) 1000 Switching frequency (max) (kHz) 1000 Features Enable, Light Load Efficiency, Output discharge, Power good, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT), DCS-Control Vout (min) (V) 1.2 Vout (max) (V) 10 Iq (typ) (µA) 13 Duty cycle (max) (%) 100
WSON (DSG) 8 4 mm² 2 x 2
  • Wide Input Voltage Range 3 V to 17 V
  • Input Supply Voltage Supervisor (SVS) With Adjustable Threshold and Hysteresis Consuming Typical 6-µA Quiescent Current
  • Wide Output Voltage Range 1.2 V to 10 V
  • Typical 13-µA Quiescent Current
  • 350-nA Typical Shutdown Current
  • Seamless Power Save Mode Transition
  • DCS-Control™ Scheme
  • Low Output Ripple Voltage
  • Up to 1-MHz Switching Frequency
  • Highest Efficiency over Wide VIN and VOUT Range
  • Pin to Pin Compatible with TPS62160/70
  • 100% Duty Cycle Mode
  • Power Good Open Drain Output
  • Output Discharge Function
  • Small 2-mm × 2-mm 8-pin WSON Package
  • Wide Input Voltage Range 3 V to 17 V
  • Input Supply Voltage Supervisor (SVS) With Adjustable Threshold and Hysteresis Consuming Typical 6-µA Quiescent Current
  • Wide Output Voltage Range 1.2 V to 10 V
  • Typical 13-µA Quiescent Current
  • 350-nA Typical Shutdown Current
  • Seamless Power Save Mode Transition
  • DCS-Control™ Scheme
  • Low Output Ripple Voltage
  • Up to 1-MHz Switching Frequency
  • Highest Efficiency over Wide VIN and VOUT Range
  • Pin to Pin Compatible with TPS62160/70
  • 100% Duty Cycle Mode
  • Power Good Open Drain Output
  • Output Discharge Function
  • Small 2-mm × 2-mm 8-pin WSON Package

The TPS62125 device is a high-efficiency synchronous step-down converter optimized for low and ultralow power applications providing up to 300-mA output current. The wide input voltage range of 3 V to 17 V supports 4-cell alkaline and 1- to 4-cell Li-Ion batteries in series configuration as well as 9-V to 15-V powered applications. The device includes a precise low-power enable comparator which can be used as an input supply voltage supervisor (SVS) to address system specific power-up and power-down requirements. The enable comparator consumes only 6-µA quiescent current and features an accurate threshold of 1.2 V typical as well as an adjustable hysteresis. With this feature, the converter can generate a power supply rail by extracting energy from a storage capacitor fed from high impedance sources such as solar panels or current loops. With its DCS-Control scheme the converter provides power-save mode operation to maintain highest efficiency over the entire load current range. At light loads the converter operates in pulse frequency modulation (PFM) mode and transitions seamlessly and automatically in pulse width modulation (PWM) mode at higher load currents. The DCS-Control™ scheme is optimized for low-output ripple voltage in PFM mode in order to reduce output noise to a minimum and features excellent AC load regulation. An open-drain power good output indicates once the output voltage is in regulation.

The TPS62125 device is a high-efficiency synchronous step-down converter optimized for low and ultralow power applications providing up to 300-mA output current. The wide input voltage range of 3 V to 17 V supports 4-cell alkaline and 1- to 4-cell Li-Ion batteries in series configuration as well as 9-V to 15-V powered applications. The device includes a precise low-power enable comparator which can be used as an input supply voltage supervisor (SVS) to address system specific power-up and power-down requirements. The enable comparator consumes only 6-µA quiescent current and features an accurate threshold of 1.2 V typical as well as an adjustable hysteresis. With this feature, the converter can generate a power supply rail by extracting energy from a storage capacitor fed from high impedance sources such as solar panels or current loops. With its DCS-Control scheme the converter provides power-save mode operation to maintain highest efficiency over the entire load current range. At light loads the converter operates in pulse frequency modulation (PFM) mode and transitions seamlessly and automatically in pulse width modulation (PWM) mode at higher load currents. The DCS-Control™ scheme is optimized for low-output ripple voltage in PFM mode in order to reduce output noise to a minimum and features excellent AC load regulation. An open-drain power good output indicates once the output voltage is in regulation.
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Technical documentation

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Type Title Date
* Data sheet TPS62125 3-V to 17-V, 300-mA Step-Down Converter With Adjustable Enable Threshold and Hysteresis datasheet (Rev. E) PDF | HTML 19 May 2017
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 Dec 2023
Application note Using the TPS62125 in an Inverting Buck-Boost Topology (Rev. C) PDF | HTML 30 Nov 2022
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 May 2022
EVM User's guide TPS62125 Buck Converter Evaluation Module User's Guide (Rev. C) PDF | HTML 08 Jun 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
White paper Extending Battery Life in Smart E-Locks (Rev. A) 04 Jun 2020
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 14 Oct 2019
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 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 threshold 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 PDF | HTML 27 Oct 2016
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 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
Analog Design Journal High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions 25 Jul 2013
Analog Design Journal 4Q 2012 Issue Analog Applications Journal 25 Sep 2012
Analog Design Journal Harnessing wasted energy in 4- to 20-mA current-loop systems 25 Sep 2012
Application note How to Measure the Control Loop of DCS-Control Devices (Rev. A) 09 Aug 2012
Analog Design Journal 3Q 2012 Issue Analog Applications Journal 17 Jul 2012
Analog Design Journal Easy solar-panel maximum-power-point tracking for pulsed-load applications 17 Jul 2012
Application note Designing for Lowest Noise with the TPS62125 13 Jun 2012
Application note Optimizing the TPS62125 Output Filter 02 May 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 Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs 19 Sep 2011
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011

Design & development

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

Evaluation board

TPS62125EVM-044 — 3-V to 17-V, 300-mA step-down converter with adjustable enable threshold evaluation module

The TPS62125EVM-044 evaluation module (EVM) is designed to evaluate and test the operation and functionality of the TPS62125 device.  The TPS62125EVM-044 converts a 4-V to 17-V input voltage to a regulated 3.3-V output voltage that delivers 300 mA. The TPS62125 is a high efficiency and small (...)

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

TPS62125 TINA-TI Transient Reference Design

SLVM683.TSC (145 KB) - TINA-TI Reference Design
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Simulation model

TPS62125 TINA-TI Transient Spice Model

SLVM684.ZIP (33 KB) - TINA-TI Spice Model
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Simulation model

TPS62125 Unencrypted PSpice Transient Model Package (Rev. D)

SLVM590D.ZIP (226 KB) - PSpice Model
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Calculation tool

SLVC780 — Design Tool for Output Voltage Adjustment Using a DAC

Calculator tool to adjust the power supply's output voltage with an analog input voltage
Supported products & hardware

Supported products & hardware

Products
Precision DACs (≤10 MSPS)
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Power modules (integrated inductor)
TPS82084 — 2-A, High-efficiency step-down converter module with integrated inductor TPS82085 — 3A, High-Efficiency Step-Down Converter Module with Integrated Inductor TPS82130 — 17-V input 3-A step-down converter module with integrated inductor TPS82140 — 17V Input 2A Synchronous Step-Down Converter MicroSiP™ Module With Integrated Inductor TPS82150 — 17V Input 1A Synchronous Step-Down Converter MicroSiP™ Module With Integrated Inductor TPSM82810 — 2.75-V to 6-V, 4-A step-down module with adjustable-frequency & tracking in 3 x 4-mm μSIP package TPSM82813 — 6V 3A step-down module with optional frequency synchronization, adjustable soft-start and tracking TPSM82821 — 5.5-V input, 1-A step-down module with integrated inductor in 2 x 2.5 x 1.1-mm μSIP package TPSM82822 — 5.5-V input, 2-A step-down module with integrated inductor in 2 x 2.5 x 1.1-mm μSIP package
AC/DC & DC/DC converters (integrated FET)
TLV62065 — 3MHz 2A Step Down Converter in 2x2 SON Package TLV62080 — 1.2A High Efficient Step Down Converter in 2x2mm SON Package TLV62084 — 2A High Efficient Step Down Converter in 2x2mm SON Package TLV62084A — 2A High Efficient Step Down Converter in 2x2mm SON Package TLV62085 — 3-A High Efficiency Step-Down Converter in 2x2 QFN TLV62090 — 3A High Efficiency Step Down Converter in 3x3mm QFN Package TLV62095 — 4A Synchronous Step Down Converter with DCS Control TLV62130 — 3-17V 3A Step-Down Converter in 3x3 QFN Package TLV62130A — 3-17V 3A Step-Down Converter with DCS-Control in 3x3 QFN Package TLV62150 — 4-17V 1A Step-Down Converter with DCS-Control™ TLV62150A — 4-17V, 1A STEP-DOWN CONVERTER with DCS-Control in 3x3 QFN Package TLV62565 — 1.5A Buck Converter in SOT23 Package TLV62566 — 1.5A Buck Converter with Power Good, in SOT23 Package TLV62568 — 2.5V-5.5V input, 1A high efficiency step-down buck converter in SOT23 and SOT563 package TLV62568A — 2.5V-5.5V input, 1A high efficiency step-down buck converter with forced PWM in small SOT563 package TLV62569 — 2.5V-5.5V input, 2-A high efficiency step-down buck converter in SOT23 and SOT563 package TLV62569A — 2A High Efficiency Step-down Buck Converter with forced PWM in SOT Package TLV62585 — 2.5V-5.5V input, 3-A high efficiency step-down converter in 2x2 QFN or SOT563 package TPS62000 — Adjustable, 600-mA, 95% Efficient Step-Down Converter TPS62000-HT — High Temperature High-Efficiency Step-Down Low Power DC-DC Converter TPS62020 — Adjustable, 600-mA, 95% Efficient Step-Down Converter, 18uA, MSOP-10 TPS62040 — Adjustable, 1.2-A, 95% efficient step-down converter, 18 uA, MSOP-10 and QFN TPS62050 — Adjustable, 800-mA, 10V Vin, 95% Efficient Step-Down Converter in MSOP-10 TPS62056 — 3.3-V Output, 800-mA, 10V Vin, 95% Efficient Step-Down Converter in MSOP-10 TPS62060 — 3MHz, 1.6A Step-Down Converter in 2x2 SON Package TPS62065 — 3MHz, 2A Step-Down Converter in 2x2 SON Package TPS62065-Q1 — 3MHz, 2A Automotive Step-Down Converter in 2x2 SON Package TPS62067 — 3MHz, 2A Step-Down Converter in 2x2 SON Package TPS62067-Q1 — Automotive 3-MHz 2-A step-down converter in 2×2 SON package TPS62080 — 1.2A High Efficient Step Down Converter in 2x2mm SON Package, with Adjustable Vout TPS62080A — 1.2A High Efficient Step Down Converter in 2x2mm SON Package TPS62085 — 3-A Step-Down Converter with DCS-Control and Hiccup Short Circuit Protection in 2x2 HotRod Package TPS62088 — 2.4-V to 5.5-V input, tiny 6-pin 3-A step-down converter in 1.2-mm x 0.8-mm WCSP TPS62090 — 3A, 6V input, up to 97% efficiency, Synchronous Step Down Converter with DCS™ Control TPS62090-Q1 — Automotive: 3A, 2.5 to 6V input, up to 97% efficiency, 3x3 QFN, Step-Down Converter TPS62095 — 4A Synchronous Step Down Converter with DCS Control TPS62097 — 2-A Step Down Converter with Selectable Switching Frequency in HotRod package TPS62097-Q1 — 2A Automotive Step-Down Converter in 3x3 QFN With Wettable Flanks TPS62100 — Multimode 300kHz Synchronous Buck Converter with Adjustable Output TPS62110 — Adjustable, 1.5-A, 17-V Vin Step-Down Converter in QFN-16 TPS62110-EP — Enhanced Product 17 V, 1.5 A Synchronous Step-Down Converter TPS62110-HT — High Temperature 17-V, 1.5-A, Synchronous Step-Down Converter TPS62110-Q1 — Automotive 3V to 17V, 1.5A Buck Converter in QFN-16 package TPS62113 — 1.5-A, 17-Vin Step-Down Converter with LBI function in QFN-16 TPS62120 — 15V, 75mA, 96% efficiency Step-Down Converter with DCS-Control TPS62122 — 15V, 75mA, 96% efficiency Step-Down Converter TPS62125 — 3V-17V, 300mA Buck Converter With Adjustable Enable Threshold And Hysteresis TPS62130 — 3-17V 3A Step-Down Converter with DCS-Control in 3x3 QFN Package TPS62130A — 3-V to 17-V, 3-A step-down converter with DCS-control in 3x3 QFN package TPS62130A-Q1 — TPS62130A-Q1 3 to 17-V 3-A Automotive Step-Down Converter in 3 × 3 QFN Package TPS62135 — 3-17V 4.0A Step-Down Converter with 1% accuracy and PFM/Forced-PWM in 2x3QFN TPS62136 — 3-17V 4.0A Step-Down Converter with 1% accuracy and PFM/Forced-PWM in 2x3QFN TPS62140 — 3–17V 2A Step-Down Converter with DCS-Control in 3x3 QFN package TPS62140A — 3–17V 2A Step-Down Converter with DCS-Control in 3x3 QFN package TPS62147 — 3-17V 2.0A Step-Down Converter with 1% accuracy and PFM/Forced-PWM in 2x3QFN TPS62148 — 3-17V 2.0A Step-Down Converter with 1% accuracy and PFM/Forced-PWM in 2x3QFN TPS62150 — 3–17V 1A Step-Down Converter with DCS-Control in 3x3 QFN package TPS62150A — 3-17V 1A 3MHz Step-Down Converter with DCS-Control in 3x3 QFN Package TPS62150A-Q1 — TPS62150A-Q1 3 to 17-V 1-A AUTOMOTIVE Step-Down Converter in 3 × 3 QFN Package TPS62160 — 3V-17V 1A Step-Down Converters with DCS-Control™ TPS62160-Q1 — 3V-17V 1A Automotive Step-Down Converters in 2x2SON TPS62170 — 3–17V 0.5A Step-Down Converter with DCS-Control in 2x2 QFN package TPS62170-Q1 — 3-17V 0.5A Automotive Step-Down Converter in 2x2 QFN package TPS62175 — 28V, 0.5A Step-Down Converter with SNOOZE Mode TPS62180 — 4-V to 15-V, 6-A synchronous buck converter with power good, 1% accuracy, and adjustable soft start TPS62184 — 4-V to 17-V, 6-A synchronous buck converter with power good, 1% accuracy, and adjustable soft start TPS62200 — Adjustable, 300-mA, 95% Efficient Step-Down Converter in SOT-23 TPS62220 — Adjustable, 400-mA, 95% Efficient Step-Down Converter, 15uA, ThinSOT-23 TPS62240 — 2.25MHz 300mA Step-Down Converter in 2x2mm SON/TSOT23 Package TPS62250 — 2.25MHz, 1A Peak Current Limited Step-Down Converter TPS62260 — 2.25MHz 600mA Step-Down Converter in 2x2mm SON/TSOT23 Package TPS62260-Q1 — Automotive 2V to 6V, 2.25MHz Fixed Frequency 600mA Buck Converter in 2x2mm SON/TSOT23 Package TPS62290 — 2.25MHz 1A Step-Down Converter in 2x2mm SON Package TPS62290-Q1 — Automotive 2.3V to 6V, 2.25MHz Fixed Frequency 1A Buck Converter in 2x2mm SON/TSOT23 Package TPS62400 — Dual, Adjustable, 400mA and 600mA, 2.25MHz Step-Down Converter with 1-Wire Interface in QFN TPS62400-Q1 — Automotive Catalog Dual, Adjustable, 400mA & 600mA, 2.25MHz Step-Down Converter w/ 1-Wire Interface TPS62410 — 2.25MHZ 2x800mA Dual Step-Down Converter with 1-Wire Interface in QFN TPS62410-Q1 — Automotive 2.5V to 6V, 2.25MHz Fixed Frequency Dual (800mA/800mA) Buck Converter TPS62420 — Dual, Adjustable, 600mA and 1000mA, 2.25MHz Step-Down Converter with 1-Wire Interface in QFN TPS62420-Q1 — Automotive 2.5V to 6V, 2.25MHz Fixed Frequency Dual (1A/600mA) Buck Converter with 1-Wire Interface TPS62480 — 6A, 2.4V-5.5V input, Synchronous step-down converter with PG Output, Adjust. Soft-start and Optional TPS62510 — Adjustable, 96% Efficiency, 1.5A Buck Converter for low input voltages TPS62560 — 2.25MHz 600mA Step-Down Converter in 2x2mm SON Package TPS62561 — 2.25MHz 600mA Step-Down Converter in TSOT23 Package TPS62590 — 2.25MHz, 1A Step-Down Converter in 2 x 2 SON Package TPS62590-Q1 — Automotive 2.5V to 6V, 2.25MHz Fixed Frequency 1A Buck Converter in 2x2mm SON Package TPS62750 — 2.25MHz, Step-Down Converter w/ Programmable Input Current Limits for USB powered Applications TPS62751 — 2.25MHz, Step-Down Converter w/ Programmble Input Current Limits for USB powered Applications TPS62770 — Tiny Single-chip Dual Solution with 360nA Iq Buck and up to 15V Boost in WCSP TPS62810-Q1 — Automotive 2.75-V to 6-V, 4-A step-down converter in a 2mm x 3mm wettable-flanks QFN package TPS62810M — 2.75-V to 6-V, 4-A step-down converter in a 2-mm x 3-mm QFN package with -55C extended temperature TPS62821 — 2.4-V to 5.5-V input, 1-A step-down converter with 1% accuracy in 1.5-mm x 2-mm VSON-HR package TPS62822 — 2.4-V to 5.5-V input, 2-A step-down converter with 1% accuracy in 1.5-mm x 2-mm VSON-HR package TPS62823 — 2.4-V to 5.5-V input, 3-A step-down converter with 1% accuracy in 1.5-mm x 2-mm VSON-HR package TPS62825 — 2.4-V to 5.5-V input, 2-A step-down converter with 1% accuracy in 1.5-mm x 1.5-mm QFN TPS62826 — 2.4-V-5.5-V input, 3-A step-down converter with 1% accuracy in 1.5-mm x 1.5-mm VSON-HR package TPS62827 — 2.5-V to 5.5-V input, 4-A step-down converter with 1% accuracy in 1.5-mm x 1.5-mm QFN
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Gerber file

TPS62125EVM-044 Gerbers (Rev. A)

SLVC410A.ZIP (338 KB)
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