TPS62821

ACTIVE

2.4V-5.5V input, 1A step-down converter With 1% Accuracy in 1.5x2mm QFN

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Product details

Parameters

Vin (Min) (V) 2.4 Vin (Max) (V) 5.5 Vout (Min) (V) 0.6 Vout (Max) (V) 4 Iout (Max) (A) 1 Iq (Typ) (mA) 0.004 Iq (Typ) (uA) 4 Switching frequency (Min) (kHz) 2200 Switching frequency (Max) (kHz) 2200 Features Enable, Light Load Efficiency, Output Discharge, Over Current Protection, Power Good, Pre-Bias Start-Up, 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

VSON-HR (DLC) 8 3 mm² 1.5 x 2 open-in-new Find other Buck converters (integrated switch)

Features

  • DCS-Control™ topology
  • 26-mΩ/25-mΩ internal power switches (TPS62823)
  • Up to 3-A output current (TPS62823)
  • Very low quiescent current of 4 µA
  • Switching frequency of typically 2.2 MHz
  • 1% feedback voltage accuracy (full temp. range)
  • Enable (EN) and power good (PG)
  • Adjustable output voltage from 0.6 V to 4 V
  • 100% duty-cycle mode
  • Internal soft-start circuitry
  • Seamless power save mode transition
  • Undervoltage lockout
  • Active output discharge
  • Cycle-by-cycle current limit
  • HICCUP short-circuit protection
  • Over temperature protection
  • CISPR11 class B compliant
  • Create a custom design using the TPS62822 with the WEBENCH® Power Designer

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Description

The TPS6282x is an all-purpose and easy to use synchronous step-down DC-DC converter with a very low quiescent current of only 4 µA. It supplies up to 3A output current (TPS62823) from a 2.4-V to 5.5-V input voltage. Based on the DCS-Control™ topology it provides a fast transient response.

The internal reference allows to regulate the output voltage down to 0.6 V with a high feedback voltage accuracy of 1% over the junction temperature range of -40°C to 125°C. The 1-A, 2-A, 3-A scalable pin-to-pin and BOM-to-BOM compatible device family can be used with small 470-nH inductors.

The TPS6282x include an automatically entered power save mode to maintain high efficiency down to very light loads.

The device features a Power Good signal and an internal soft start circuit. It is able to operate in 100% mode. For fault protection, it incorporates a HICCUP current limit as well as a thermal shutdown.

The TPS6282x are packaged in a 2 mm x 1.5 mm QFN-8 package.

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Technical documentation

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Type Title Date
* Datasheet TPS6282x 5.5-V, 1-A, 2-A, 3-A Step-Down Converter Family with 1% Accuracy datasheet (Rev. C) Nov. 25, 2019
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
Technical articles QFN soldering tips and tricks Nov. 26, 2018
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application notes Solve Point-of-Load Power Design Challenges: Single Board Computer Applications Aug. 24, 2018
Application notes Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018
Technical articles Output accuracy varies with temperature – 1% is not always 1% May 02, 2018
Application notes A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
User guides TPS6282xEVM-005 Evaluation Module Nov. 03, 2017
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
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
Application notes Accurately measuring efficiency of ultralow-IQ devices Jan. 22, 2014
Application notes High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions Jul. 25, 2013
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application notes Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) Jan. 13, 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

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 TPS62821EVM-005 evaluation module (EVM) facilitates the evaluation of the TPS62821 1-A, step-down converter with DCS-Control in a 2-mm by 1.5-mm QFN package. The EVM outputs a 1.8-V output voltage with 1% accuracy from input voltages between 2.4V and 5.5V with a maximum solution height of 1 mm (...)
Features
  • 2.4V to 5.5V Input Voltage Range
  • 1.8V Output Voltage with 1% accuracy
  • 1A of Output Current
  • 1mm Maximum Solution Height
  • 36 mm2 Total Solution Size
  • Pin-to-pin 1A, 2A, 3A Devices (TPS62821/2/3)

Design tools & simulation

SIMULATION MODELS Download
SLVMCA8A.ZIP (923 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
  • (...)
GERBER FILES Download
SLUC643.ZIP (304 KB)
GERBER FILES Download
SLVC780.ZIP (138 KB)

Reference designs

REFERENCE DESIGNS Download
Isolated power architecture reference design for communication and analog input/output modules
TIDA-00300 This reference design provides a simple means through which to isolate I2C or SPI type communication lines. This is often required in Grid Infrastructure applications such as, protertion relays and circuit breakers, where high voltages are involved. This reference design provides the complete (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
VBus protection with eFuse for solid state drive modules reference design
TIDA-050028 — This reference design provides the front end protection of a SSD module and showcases the fully featured power tree for standard 3.3-V, 1.8-V, and 1.5-V rails. This size optimized design helps customers with appropriate selection of the integrated circuit protection device, load switches, and DC/DCs (...)
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REFERENCE DESIGNS Download
Compact, efficient, 24-V input auxiliary power supply reference design for servo drives
TIDA-010009 — This reference design showcases a method to generate power supplies required in a servo or AC drive including the analog and digtal I/O interfaces, encoder supply, isolated transceivers and digital processing block. This design also implements protection against input reverse polarity, output (...)
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REFERENCE DESIGNS Download
High efficiency power supply architecture reference design for protection relay processor module
TIDA-010011 — This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High efficiency, low-output ripple power supply reference design for imaging application
TIDA-01579 — The point-of-load power-tree on video surveillance systems is optimized with this reference design. This reference design has a high performance on key parameters such as output voltage accuracy, voltage ripple, and thermal dissipation. This high performance is possible with a small board area and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Two-Stage Power Supply Reference Design for Field Transmitters
PMP15039 — This dual output reference design provides an example of how to power FPGAs, ASICs, or MCUs when space-constraints are a primary concern. The wide 6-V to 60-V input voltage range and the use of ultra-small and highly efficient DC/DC converters makes the design well suited for applications like (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VSON-HR (DLC) 8 View options

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