TPS62840

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60-nA IQ, 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter

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Product details

Parameters

Vin (Min) (V) 1.8 Vin (Max) (V) 6.5 Vout (Min) (V) 0.8 Vout (Max) (V) 3.6 Iout (Max) (A) 0.75 Iq (Typ) (uA) 0.06 Switching frequency (Min) (kHz) 1800 Switching frequency (Max) (kHz) 1800 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Output Discharge, Over Current Protection, Soft Start Fixed, Synchronous Rectification, UVLO Fixed 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 (YBG) 6 1 mm² 1.508 x 1.008 HVSSOP (DGR) 8 VSON-HR (DLC) 8 3 mm² 1.5 x 2 open-in-new Find other Buck converters (integrated switch)

Features

  • 60-nA operating quiescent current
  • 100% duty-cycle mode with 120-nA IQ
  • Input voltage range VIN from 1.8 V to 6.5 V
  • Output current up to 750 mA
  • RF friendly DCS-Control™
  • 80% efficiency at 1 µA IOUT (3.6 VIN to 1.8 VOUT)
  • 16 selectable output voltages via VSET pin
  • Auto transition PFM/PWM or forced-PWM mode
  • Selectable forced PWM and STOP modes
  • Output discharge function
  • 25-nA shutdown current
  • SON-8, WCSP-6 and thermally enhanced HVSSOP-8 packages

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Description

The TPS62840 is a high-efficiency step-down converter with ultra-low operating quiescent current of typically 60 nA. The device contains special circuitry to achieve just 120 nA IQ in 100% mode to further extend battery life near the end of discharge.

The device uses DCS-Control to cleanly power radios and operates with a typical switching frequency of 1.8 MHz. In Power-Save Mode, the device extends the light load efficiency down to a load current range of 1 µA and below.

16 predefined output voltages can be selected by connecting a resistor to pin VSET, making the device flexible for various applications with a minimum amount of external components.

The STOP pin of the device immediately eliminates any switching noise in order to take a noise-free measurement in test and measurement systems.

The TPS62840 provides an output current of up to 750 mA. With an input voltage of 1.8 V to 6.5 V, the device supports multiple power sources such as 2S to 4S Alkaline, 1S to 2S Li-MnO2, or 1S Li-Ion/Li-SOCl2.

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Technical documentation

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Type Title Date
* Datasheet TPS62840 1.8-V to 6.5-V, 750-mA, 60-nA IQ Step-Down Converter datasheet (Rev. D) Apr. 27, 2020
Technical articles Advantages of the STOP function for low-noise data-acquisition applications Mar. 31, 2020
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
User guide TPS62841-2EVM123 EVM User's Guide Feb. 25, 2020
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
User guide TPS62842EVM-103 User's Guide Aug. 28, 2019
Application note Extend Battery Life with <100 nA IQ Buck Converter Achieving <150 µV Voltage Rip Aug. 14, 2019
Application note High-Performance CMOS Image Sensor Power Supply in Industrial Camera and Vision Aug. 05, 2019
Technical articles Do all rails need low Iq? Jul. 15, 2019
Technical articles Deciphering low Iq: Using WEBENCH® to design near 100% duty-cycle for ultra-low power applications Jul. 15, 2019
User guide TPS62840-1YBGEVM56 User's Guide May 24, 2019
User guide TPS62840-1DLCEVM55 User's Guide May 15, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application note QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
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 Achieving a clean startup by using a DC/DC converter with a precise enable-pin t Oct. 24, 2017
Application note Testing tips for applying external power to supply outputs without an input volt Oct. 24, 2016
Application note Understanding frequency variation in the DCS-Control(TM) topology Oct. 30, 2015
Application note Basic Calculation of a Buck Converter's Power Stage (Rev. B) Aug. 17, 2015
Application note Five steps to a great PCB layout for a step-down converter Jan. 29, 2015
Application note Accurately measuring efficiency of ultralow-IQ devices Jan. 22, 2014
Application note High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions Jul. 25, 2013
Application note How to Measure the Control Loop of DCS-Control Devices (Rev. A) Aug. 09, 2012
Application note Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) Jan. 13, 2012
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep. 19, 2011
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 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 TPS62840-1DLCEVM55 evaluation module (EVM) facilitates the evaluation of the TPS6284XDLC family of 750-mA step-down converters with 60-nA IQ in small 1.5-mm by 2.0-mm QFN packages. The EVM contains 2 separate circuits to create output voltages between 0.8 V and 3.3 V from higher input voltages (...)

Features
  • 1.8-V to 6.5-V input voltage range
  • 750-mA output current
  • 60-nA quiescent current
  • 1.5 x 2.0 mm² QFN package
  • Two independent circuits to support a range of output voltages (0.8 V to 3.3 V)
EVALUATION BOARD Download
49
Description

The TPS62840-1YBGEVM056 evaluation module (EVM) facilitates the evaluation of the TPS6284XYBG family of 750-mA step-down converters with 60-nA IQ in small 1.5-mm by 1-mm WCSP packages with 0.4-mm pitch. The EVM contains 2 separate circuits to create output voltages between 0.8 V and 3.3 V from (...)

Features
  • 1.8-V to 6.5-V input voltage range
  • 750-mA output current
  • 60-nA quiescent current
  • 1.5 x 2.0 mm² WCSP package
  • 1-mm maximum solution height
  • Two independent circuits to support a range of output voltages (0.8 V to 3.3 V)
EVALUATION BOARD Download
49
Description

The TPS62841-2EVM123 evaluation module (EVM) facilitates the evaluation of the TPS6284XDGR 750-mA step-down converter with 60-nA IQ in a high thermal performance HVSSOP package. The EVM contains two separate circuits to create output voltages between 0.8-V and 3.6-V from higher input voltages (...)

Features
  • 1.8-V to 6.5-V input voltage range
  • 750-mA output current
  • 60-nA quiescent current
  • Thermally enhanced HVSSOP package
  • Two independent circuits to support a range of output voltages (0.8-V to 3.6-V)
EVALUATION BOARD Download
49
Description

The TPS62842EVM-103 evaluation module (EVM) facilitates the evaluation of the TPS62842DGR 750-mA step-down converter with 60-nA IQ in a high thermal performance HVSSOP package. The EVM contains a circuit to convert output voltages between 1.8 V and 3.6 V from higher input voltages between 1.8 V and (...)

Features
  • 1.8-V to 6.5-V input voltage range
  • 750-mA output current
  • 60-nA quiescent current
  • Thermally enhanced HVSSOP package

Design tools & simulation

SIMULATION MODEL Download
SLUM691C.ZIP (83 KB) - PSpice Model
SIMULATION MODEL Download
SLVMD74.ZIP (92 KB) - PSpice Model
SIMULATION MODEL Download
SLVMD75.ZIP (98 KB) - PSpice Model
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
  • (...)
GERBER FILE Download
SLVC773.ZIP (452 KB)
GERBER FILE Download
SLVC774.ZIP (445 KB)

Reference designs

REFERENCE DESIGNS Download
Air blower and valve control reference design for respiratory applications
TIDA-010072 — This reference design provides a compact system design capable of supporting motor acceleration and deceleration up to ±200 kRPM/s, which is a key requirement in many respirator applications. The design supports a number of offboard C2000 controllers including (...)
document-generic Schematic
REFERENCE DESIGNS Download
Low-power options for smart meter wireless modules using primary cells reference design
TIDA-010053 — This reference design showcases three different power architectures for smart flow meters with lithium manganese dioxide (LiMnO2) primary batteries and commercial off-the-shelf narrowband modules for Internet of Things (IoT)-related applications. The three power solutions are combined with the (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
DSBGA (YBG) 6 View options
HVSSOP (DGR) 8 View options
VSON-HR (DLC) 8 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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