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TPS40422

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Dual Output or Multiphase Synchronous Buck Controller with PMBus

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Data sheet

TPS40422

ACTIVE
Data sheet Order now

Product details

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) (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
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) (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
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VQFN (RHA) 40 36 mm² 6 x 6 WQFN (RSB) 40 25 mm² 5 x 5
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  • 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
  • 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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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.

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

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Type Title Date
* Data sheet TPS40422 Dual-Output or Two-Phase Synchronous Buck Controller with PMBus™ Interface datasheet (Rev. F) 12 Jan 2017
Application note Multiphase Buck Design from Start to Finish, Part 1 (Rev. B) 07 Apr 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC 22 Feb 2016
Technical article Select the correct PMBus POL solution for your application 03 Aug 2015
Technical article Power Tips: How to program PMBus Devices 21 Oct 2014
Technical article Nailing accurate and lossless current sensing in high-current converters 16 Nov 2013
Technical article Power Tips: When to choose multiphase 31 Oct 2013
Design guide TPS40422 Design Example 16 Feb 2012
User guide Using the PWR091EVM Dual-Output DC/DC Analog With PMBus Interface 05 Jan 2011

Design & development

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

Evaluation board

TPS40422EVM-091 — TPS40422 Dual Output or Multiphase Synchronous Buck Controller Evaluation Module

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 (...)
document-pdfAcrobat User guide
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Application software & framework

FUSION_DIGITAL_POWER_DESIGNER — Digital Power Software

Fusion Digital Power™ graphical user interface (GUI) software is 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.
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Application software & framework

FUSION_MFR_GUI — Fusion Digital Power Manufacturing Tool

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 (...)

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Driver or library

PMBUSSW-LINUX — Linux Driver for PMBUS

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
  • (...)
View options
Simulation model

TPS40422 PSpice Transient Model

SLUM250.ZIP (231 KB) - PSpice Model
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Simulation model

TPS40422 TINA-TI Transient Spice Model

SLUM548.ZIP (127 KB) - TINA-TI Spice Model
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Simulation model

TPS40422_Startup TINA-TI Reference Design

SLUM549.TSC (660 KB) - TINA-TI Reference Design
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Simulation model

TPS40422_Multiphase_Startup TINA-TI Reference Design

SLUM550.TSC (535 KB) - TINA-TI Reference Design
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Calculation tool

Type III Compensation Calculation Tool (Rev. E)

SLUC263E.ZIP (185 KB)
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Reference designs

PMP7466 — 12Vin Compact Dual 30A Point-of-load with PMBus Using NexFET Power Block Reference Design

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-pdfAcrobat Schematic
Reference designs

PMP6924 — 12Vin Compact Single 60A Point-of-Load Reference Design with PMBus for Size Constrained Applications

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-pdfAcrobat Schematic
Reference designs

PMP8853 — 12Vin Compact Dual 10A Point-of-Load Reference Design with PMBus Using NexFET Power Block

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-pdfAcrobat Schematic
Reference designs

PMP6952 — 12Vin Compact Dual 15A Point-of-load Reference Design with PMBus Using NexFET Power Block

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 (...)
document-pdfAcrobat Schematic
Reference designs

PMP9559 — 12Vin Compact Dual 5V/5.5A Point-of-Load with PMBus using NexFET Power Block II Reference Design

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-pdfAcrobat Schematic
Reference designs

PMP8999 — 12Vin 1V 50A TPS40422 & Power Block II CSD87384 2 Phases w/PMBus Interface Reference Design

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

Ordering & quality

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  • MSL rating/Peak reflow
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  • Ongoing reliability monitoring

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