TPS62810-Q1

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Automotive 2.75-V to 6-V, 4-A step-down converter in a 2mm x 3mm wettable-flanks QFN package

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Product details

Parameters

Vin (Min) (V) 2.7 Vin (Max) (V) 6 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 4 Iq (Typ) (mA) 0.015 Iq (Typ) (uA) 15 Switching frequency (Min) (kHz) 1800 Switching frequency (Max) (kHz) 4000 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Output Discharge, Over Current Protection, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, Tracking, UVLO Fixed, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Features

  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1:
      –40°C to +125°C TA
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • Input voltage range: 2.75 V to 6 V
  • Family of 1 A, 2 A, 3 A and 4 A
  • Quiescent current 15-µA typical
  • Output voltage from 0.6 V to 5.5 V
  • Output voltage accuracy ±1% (PWM operation)
  • Adjustable soft-start
  • Forced PWM or PWM and PFM operation
  • Adjustable switching frequency of
    1.8 MHz to 4 MHz
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Spread spectrum clocking - optional
  • Power good output with window comparator
  • Package with wettable flanks

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Description

The TPS6281x-Q1 is family of pin-to-pin 1-A, 2-A, 3-A and 4-A synchronous step-down DC/DC converters. All devices offer high efficiency and ease of use. The TPS6281x-Q1 family is based on a peak current mode control topology. TPS6281x-Q1 is designed for automotive applications such as Infotainment and advanced driver assistance systems. Low resistive switches allow up to 4-A continuous output current at high ambient temperature. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can also be synchronized to an external clock in the same frequency range. In PWM/PFM mode, the TPS6281x-Q1 automatically enter Power Save Mode at light loads to maintain high efficiency across the whole load range. The TPS6281x-Q1 provide 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or forming tracking of the output voltage to an external source. This allows external sequencing of different supply rails and limiting the inrush current during start-up.

The TPS6281x-Q1 is available in a 3-mm x 2-mm VQFN package with wettable flanks.

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Technical documentation

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Type Title Date
* Datasheet TPS6281x-Q1 2.75-V to 6-V Adjustable-Frequency Step-Down Converter datasheet (Rev. E) Apr. 15, 2020
Application notes TPS6281x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) Sep. 17, 2020
White papers Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
Application notes Powering VCCINT_VCU Rail in Xilinx® Zynq®UltraScale+™ Family of Multiprocessors Jun. 08, 2020
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Application notes Synchronizing DC/DC Converters in a Power Tree Jan. 16, 2020
White papers Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
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
User guides TPS62810EVM-015 Evaluation Module Jul. 17, 2018
Application notes Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018

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 TPS62810EVM-015 is designed to help the user easily evaluate and test the operation and functionality of the TPS6281x buck converters. The EVM convert a 2.7-V to 6.0-V input voltage to a regulated 1.8-V output voltage that delivers up to 4 A.
Features
  • 2.7-V to 6.0-V Input Voltage Range
  • 0.6-V to 5.5-V Adjustable Output Voltage
  • Adjustable Switching Frequency of 1.8-MHz to 4-MHz
  • 15-μA Operating Quiescent Current
  • Power Save Mode for Light Load Efficiency
  • 100% Duty Cycle for Lowest Dropout

Design tools & simulation

SIMULATION MODELS Download
SLVMCS5A.ZIP (123 KB) - PSpice Model
SIMULATION MODELS Download
SLVMD82.ZIP (483 KB) - SIMPLIS 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
SLVC780.ZIP (138 KB)

Reference designs

REFERENCE DESIGNS Download
Four-output synchronous buck reference design for automotive telematics control units
PMP21939 — This reference design uses an LM63635-Q1 synchronous buck converter to output either a 3.3-V or 5-V rail. The bus converter switches at 2.1 MHz, and the load converters (TPS62810-Q1) switch at 2.2 MHz. The system is designed for telematics control unit power. Easily configurable jumpers allow users (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive wide VIN front-end reference design for digital cockpit processing units
PMP30670 — This reference design shows a complete power tree for automotive digital cockpit applications. The LM74700-Q1 provides low-loss reverse polarity protection to the system, followed by an input filter. The LM5143-Q1 dual-synchronous buck converter provides a 3.3-V rail, which can support up to 15 A (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive instrument cluster power reference design with three outputs
PMP21669 — This reference design implements an automotive power supply solution for use in analog gauge clusters, hybrid clusters and cluster display systems. It provides 5 volt, 3.3 volt and 1.2 volt outputs suitable for powering all subsystems within an automotive instrument cluster, a cluster display, or an (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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