Texas Instruments TPS40425

Description

The TPS40425 is a PMBus, synchronous buck, driverless controller. It operates in non-smart power mode in factory default setting, and it can operate in smart power mode after PMBus programming and power reboot. It can be configured as dual-output or 2-phase. It is also stackable up to 4 phases to support load current as high as 120 A. Interleaved phase shift for 2-, 3-, or 4-phases reduce the input and output ripples therefore reducing input and output capacitance.

The wide input voltage range can support 5-V and 12-V intermediate supply buses. The 0.5% reference voltage satisfies the need of precision voltage to the modern ASICs.

Using the PMBus standard, the TPS40425 device can program reference voltage, fault limit, UVLO threshold, soft-start time and turn-on and turn-off delay.

In addition, the device implements an accurate measurement system to monitor the output voltages, currents and temperatures for individual channels.

Features

• Non-Smart Power Mode in Factory Default
• Pin-for-Pin Equivalent to TPS40428
• – Smart Power Mode in Factory Default
• Single Supply Operation: 4.5 V to 20 V
• VOUT from 0.6 V
• Dual or Multi-Phase Synchronous Buck Controller
• Individual High-Speed AVS Interface
• (0.5-V to 1.5-V Range)Fast Transient Response
• Stackable up to Four Phases 2-, 3-, or 4-Phase Interleaved Phase ShiftsAccurate Current Sharing
• PMBus Capability Margining Up or Down with 2-mV Step
• Programmable Fault Limit and Response±0.8% VOUT
• Accuracy Current Monitoring±4.5°C External Temperature
• Monitoring with x3904Programmable UVLO ON/OFF Thresholds
• Programmable Soft-Start Time, Turn-On Delay, and Turn-Off Delay
• On-Chip Non-Volatile Memory (NVM) to Store Custom Configurations
• 0.6-V Reference Voltage with 0.5% Accuracy from –40°C to 125°C
• Inductor DCR Current SensingProgrammable ƒSW from 200 kHz to 1.5 MHz
• Supports Pre-biased Output
• Differential Remote Sensing
• Synchronization to an Extermal Clock
• OC/OV/UV/OT Fault Protection40-Pin, 6 mm × 6 mm, QFN Package
• Support for TI Power StageCompatible with High-Frequency,
• Synchronous MOSFET Driver TPS28226

Typical applications

• Switcher/Router Networking/Server/Storage
• Wireless Infrastructure

More information

• Datasheet
• IC product information