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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 5.6 Iout (Max) (A) 60 Iq (Typ) (mA) 18 Iq (Typ) (uA) 18000 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 1000 Features Dynamic Voltage Scaling, Enable, Frequency Synchronization, Multiple Outputs, PMBus, Phase Interleaving, Remote Sense Operating temperature range (C) -40 to 125 Regulated outputs (#) 2 Number of Phases 2 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

VQFN (RHA) 40 36 mm² 6 x 6 WQFN (RSB) 40 25 mm² 5 x 5 open-in-new Find other Buck controllers (external switch)

Features

  • Single Supply Operation: 4.5 V to 20 V
  • Output Voltage from 0.6 V to 5.6 V
  • Dual-output or Two-Phase Synchronous Buck Controller
  • PMBus™ Interface Capability
    • Margining Up or Down with 2-mV Step
    • Programmable Fault Limit and Response
    • Output Voltage, Output Current Monitoring
    • External Temperature Monitoring with 2N3904 Transistor
    • Programmable UVLO ON and OFF Thresholds
    • Programmable Soft-start Time and Turn-On and Turn-Off Delay
  • On-Chip Non-volatile Memory (NVM) to Store Custom Configurations
  • 180° Out-of-Phase to Reduce Input Ripple
  • 600-mV Reference Voltage with ±0.5% Accuracy from 0°C to 85°C
  • Inductor DCR Current Sensing
  • Programmable Switching Frequency: 200 kHz to 1 MHz
  • Voltage Mode Control with Input Feed Forward
  • Current Sharing for Multiphase Operation
  • Supports Pre-biased Output
  • Differential Remote Sensing
  • External SYNC
  • BPEXT Pin Boosts Efficiency by Supporting External Bias Power Switch Over
  • OC, OV, UV, and OT Fault Protection
  • 40-Pin, 6 mm × 6 mm VQFN Package with 0.5-mm Pitch
  • 40-Pin, 5 mm × 5 mm WQFN Package with 0.4-mm Pitch
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Description

The TPS40422 is a dual-output PMBus protocol, synchronous buck controller. It can be configured also for a single, two-phase output.

The wide input range supports 5-V and 12-V intermediate buses. The accurate reference voltage satisfies the need of precision voltage to the modern ASICs and potentially reduces the output capacitance. Voltage mode control reduces noise sensitivity and also ensures low duty ratio conversion.

Using the PMBus protocol, the device margining function, reference voltage, fault limit, UVLO threshold, soft-start time, turn-on delay, and turn-off delay can be programmed.

In addition, an accurate measurement system is implemented to monitor the output voltages, currents and temperatures for each channel.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet TPS40422 Dual-Output or Two-Phase Synchronous Buck Controller with PMBus™ Interface datasheet (Rev. F) Jan. 12, 2017
Application notes Multiphase Buck Design from Start to Finish, Part 1 (Rev. A) May 24, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC Feb. 22, 2016
Technical articles Select the correct PMBus POL solution for your application Aug. 03, 2015
Technical articles Power Tips: How to program PMBus Devices Oct. 21, 2014
Technical articles Nailing accurate and lossless current sensing in high-current converters Nov. 16, 2013
Technical articles Power Tips: When to choose multiphase Oct. 31, 2013
User guides TPS40422 Design Example Feb. 16, 2012
User guides Using the PWR091EVM Dual-Output DC/DC Analog With PMBus Interface Jan. 05, 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 Texas Instruments TPS40422EVM-091 evaluation module (EVM) helps designers evaluate the performance of the TPS40422 Dual Output or Multiphase Synchronous Buck Controller with PMBus. The EVM is designed to use a regulated 8.0Vdc to 14.0Vdc bus to produce two regulated outputs. One output is 1.2Vdc (...)
Features
  • 8V to 14V input range
  • Two independent fixed outputs: 1.2V at 20A and 3.3V at 15A
  • PMBus enabled analog controller
  • Programmable switching frequency: 200kHz–1MHz
  • Programmable soft-start
  • Programmable over current protection
  • Inductor resistance or series resistance used for current sensing
  • Remote voltage sense (...)

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Digital Power Software
FUSION_DIGITAL_POWER_DESIGNER Fusion Digital Power™  is the Graphical User Interface (GUI) used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.
Features

Some of the tasks you can perform with the GUI include:

  • Turn on or off the power supply output, either through the hardware control line or the PMBus OPERATION command
  • Monitor real-time data. Items such as input voltage, output voltage, output current, temperature, and warnings/faults are continuously (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
Fusion Digital Power Manufacturing Tool
FUSION_MFR_GUI The Fusion Digital Power Manufacturing Tool (aka MFR GUI) is a Graphical User Interface used to download firmware, upgrade firmware, configure, calibrate and test .

The MFR GUI supports the same devices as Fusion Digital Power Designer software.  This tool is typically used in manufacturing (...)

Features

Some of the tasks the tool can perform include:

  • Download/Upgrade firmware
  • Program a device configuration
  • Calibrate a device (manually or instrumented via GPIB):
    • Input voltage (Vin)
    • Output voltage (Vout)
    • Output current (Iout)
    • Temperature
  • Test the device (validate power conversion falls within acceptable Vout (...)
DRIVERS & LIBRARIES Download
Linux Driver for PMBUS
PMBUSSW-LINUX The Linux driver supports PMBus controlled Buck Controllers. The Linux driver supports communication through the PMBus and interfaces with the HWMon framework.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • tps40400
  • tps40422
  • tps544b20
  • tps544b25
  • (...)

Design tools & simulation

SIMULATION MODELS Download
SLUM250.ZIP (231 KB) - PSpice Model
SIMULATION MODELS Download
SLUM548.ZIP (127 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM549.TSC (660 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM550.TSC (535 KB) - TINA-TI Reference Design
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
  • (...)
CALCULATION TOOLS Download
SLUC263D.ZIP (131 KB)

Reference designs

REFERENCE DESIGNS Download
12Vin Compact Dual 30A Point-of-load with PMBus Using NexFET Power Block Reference Design
PMP7466 — The PMP7466 reference design is a compact dual 30A POL solution with PMBus in 1" by 1.075" size (25.4mm x27.3mm). It showcases NexFET power block CSD87350 in high-density PoL. It also adds PMBus capability to high-current rails.  It is easy to configure as dual 30A or single 60A output with (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12Vin Compact Single 60A Point-of-Load Reference Design with PMBus for Size Constrained Applications
PMP6924 — The PMP6924 reference design is a compact single 60A POL solution with PMBus in 0.7" by 0.95" size (17.8mm x24.1mm). It showcases NexFET power block CSD87350Q5D in high density PoL. It also has excellent thermal performance. It is suitable for PMBus-equipped high current applications with size (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12Vin Compact Dual 10A Point-of-Load Reference Design with PMBus Using NexFET Power Block
PMP8853 — The PMP8553 reference design is a compact dual 10A POL solution with PMBus in 0.75" by 0.975" size (19mm x24.8mm). It showcases NexFET power block CSD87330 in high density PoL. It also adds PMBus capability to low current rails.  It is easy to configure as dual 10A or single 20A output with (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12Vin Compact Dual 15A Point-of-load Reference Design with PMBus Using NexFET Power Block
PMP6952 — The PMP6952 reference design is a compact dual 15A POL solution with PMBus in 0.75" by 1.075" size (19mm x27.3mm). It showcases NexFET power block CSD87350 in high-density PoL with PMBus capability.  It is easy to configure as dual 15A or single 30A output with resistor options. It is versatile (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12Vin Compact Dual 5V/5.5A Point-of-Load with PMBus using NexFET Power Block II Reference Design
PMP9559 The PMP9559 reference design is a compact dual 5.5A POL solution with PMBus in 0.65" by 0.90" size. It showcases CSD87381P power block II with high efficiency and excellent thermal performnce. It has programmable frequency, soft-start, external compensation, adjustable current limit and OCP/OVP/OTP (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12Vin 1V 50A TPS40422 & Power Block II CSD87384 2 Phases w/PMBus Interface Reference Design
PMP8999 It is a two phase Synchronous Buck converter to provide high current with low ripple and fast dynamic response for high speed processor core applications. Same approach can also be used to power Memory and Input / Output power voltages, typically 1.2V to 3.3V. The two phase interleave reduces output (...)
REFERENCE DESIGNS Download
9-15V Input, 1V@60A using the TPS40422 Multiphase Buck PMBus Controller
PMP7328 — The PMP7328 reference design uses the TPS40422 to generate 1V at up to 60A. The design is optimized for small space while still maintaining good performance. The TPS40422 also offers PMBus control and reporting.

CAD/CAE symbols

Package Pins Download
VQFN (RHA) 40 View options
WQFN (RSB) 40 View options

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