TPS65400

ACTIVE

4.5 V to 18 V input, 4 A / 4 A / 2 A / 2 A synchronous quad converter with PMBus/I2C interface

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 275 Switching frequency (max) (kHz) 2200 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, Frequency synchronization, I2C, Over Current Protection, PMBus, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 16 Iq (typ) (µA) 8000 Duty cycle (max) (%) 92.5
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 275 Switching frequency (max) (kHz) 2200 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, Frequency synchronization, I2C, Over Current Protection, PMBus, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 16 Iq (typ) (µA) 8000 Duty cycle (max) (%) 92.5
VQFN (RGZ) 48 49 mm² 7 x 7
  • Efficiency up to 95% for each switching regulator
  • Switching regulator specifications:
    • Input voltage range: 4.5 to 18 V
    • VOUT range: 0.6 V-90%VIN
    • SW1, SW2 IOUT: 4-A max
    • SW3, SW4 IOUT: 2-A max
  • Prebias start-up algorithm minimizes voltage dip during start-up
  • Internal undervoltage lockout (UVLO), overcurrent protection (OCP), overvoltage protection (OVP), and overtemperature protection (OTP)
  • AECQ-100 grade 1 option
  • Thermally enhanced 7-mm × 7-mm 48-pin, 0.5-mm pitch VQFN package
  • Pin accessible features:
    • Adjustable VOUT with external feedback resistors
    • Sequencing control through precision enable pins for each switcher
    • Resistor adjustable PWM switching frequency from 275 kHz to 2.2 MHz
    • Clock sync input and clock output
    • Soft-start delay through external capacitor
    • Current sharing between SW1 and SW2 and between SW3 and SW4 allows support of higher current needs if required
  • PMBus runtime control and status
    • Runtime voltage positioning through adjustment of VREF
    • Enable and disable of each switcher
    • Fault and status monitoring
  • User-configurable PMBus/I2C options, saved in EEPROM
    • Power supply turn-on and turn-off sequencing
    • Sequencing can be based on fixed time delays or PGOOD dependence
    • Initial voltage positioning through VREF configuration
    • PWM frequency adjustment for each switcher
    • Individual PWM phase alignment for each switcher to minimize ripple and capacitor size
    • Adjustable current limit on each regulator enables size and cost optimization of inductors
    • Soft-start time
  • Efficiency up to 95% for each switching regulator
  • Switching regulator specifications:
    • Input voltage range: 4.5 to 18 V
    • VOUT range: 0.6 V-90%VIN
    • SW1, SW2 IOUT: 4-A max
    • SW3, SW4 IOUT: 2-A max
  • Prebias start-up algorithm minimizes voltage dip during start-up
  • Internal undervoltage lockout (UVLO), overcurrent protection (OCP), overvoltage protection (OVP), and overtemperature protection (OTP)
  • AECQ-100 grade 1 option
  • Thermally enhanced 7-mm × 7-mm 48-pin, 0.5-mm pitch VQFN package
  • Pin accessible features:
    • Adjustable VOUT with external feedback resistors
    • Sequencing control through precision enable pins for each switcher
    • Resistor adjustable PWM switching frequency from 275 kHz to 2.2 MHz
    • Clock sync input and clock output
    • Soft-start delay through external capacitor
    • Current sharing between SW1 and SW2 and between SW3 and SW4 allows support of higher current needs if required
  • PMBus runtime control and status
    • Runtime voltage positioning through adjustment of VREF
    • Enable and disable of each switcher
    • Fault and status monitoring
  • User-configurable PMBus/I2C options, saved in EEPROM
    • Power supply turn-on and turn-off sequencing
    • Sequencing can be based on fixed time delays or PGOOD dependence
    • Initial voltage positioning through VREF configuration
    • PWM frequency adjustment for each switcher
    • Individual PWM phase alignment for each switcher to minimize ripple and capacitor size
    • Adjustable current limit on each regulator enables size and cost optimization of inductors
    • Soft-start time

The TPS65400 is an integrated PMU optimized for applications requiring small form factor and high power conversion efficiency, enabling small space-constrained equipment with high ambient operating temperature without cooling. The device provides high-power efficiency at a system level by enabling a single stage conversion from an intermediate distribution bus with an optimized combination of regulators.

The TPS65400 is an integrated PMU optimized for applications requiring small form factor and high power conversion efficiency, enabling small space-constrained equipment with high ambient operating temperature without cooling. The device provides high-power efficiency at a system level by enabling a single stage conversion from an intermediate distribution bus with an optimized combination of regulators.

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Technical documentation

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Type Title Date
* Data sheet TPS65400 4.5- to 18-V Input Flexible Power Management Unit With PMBus/I2C Interface datasheet (Rev. E) PDF | HTML 17 Mar 2022
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
EVM User's guide TPS65400 Buck Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 12 May 2021
Application note How to Calculate the Load Pole and ESR Zero When Using Hybrid Output Capacitors (Rev. A) 02 Apr 2019

Design & development

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

Evaluation board

TPS65400EVM-678 — TPS65400EVM Evaluation Module

The TPS65400EVM-678 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65400. The max DC output current of this EVM is 4A,4A, 2A and 2A. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features. It also has EN1, (...)

User guide: PDF | HTML
Not available on TI.com
Driver or library

SLVC604 LGPL Library Source Used by PI-Commander-PMU

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS65400 4.5 V to 18 V input, 4 A / 4 A / 2 A / 2 A synchronous quad converter with PMBus/I2C interface
GUI for evaluation module (EVM)

SLVC603 PI-Commander-PMU EVM GUI

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS65400 4.5 V to 18 V input, 4 A / 4 A / 2 A / 2 A synchronous quad converter with PMBus/I2C interface
Hardware development
Evaluation board
TPS65400EVM-678 TPS65400EVM Evaluation Module
Simulation model

TPS65400 PSpice Average Model

SLVMAI6.ZIP (91 KB) - PSpice Model
Simulation model

TPS65400 PSpice Transient Model

SLVMAI5.ZIP (73 KB) - PSpice Model
Simulation model

TPS65400 TINA-TI Transient Reference Design

SLVMC03.TSC (139 KB) - TINA-TI Reference Design
Simulation model

TPS65400 TINA-TI Transient Spice Model

SLVMC04.ZIP (19 KB) - TINA-TI Spice Model
Reference designs

TIDEP0081 — Wideband Receiver Design Using 66AK2L06 JESD204B Attach to ADC32RF80 Reference Design

For wideband receiver system developers currently using FPGA or ASIC to connect High Speed data converters to a baseband processor, who need faster time to market with increased performance and significant reduction in cost, power, and size. This reference design includes the first widely available (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP11414 — Compact Digital Quad 4/4/2/2A Point-of-load Reference Design for Space Constrained Applications

The PMP11414 reference design features TPS65400 quad 4/4/2/2A output point-of-load in a tiny 0.65"x0.875" solution size (16.5mmx22.2mm). TPS65400 fully integrates four buck regulators into a small 7mmx7mm QFN package. It also has PMBus capability for flexible control and configuration.  The (...)
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RGZ) 48 View options

Ordering & quality

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  • Ongoing reliability monitoring
Information included:
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  • Assembly location

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