Texas Instruments TPS40428

Description

The TPS40428 device is a PMBus, synchronous buck, driverless controller. It operates in smart power mode with factory default settings, and it can operate in non-smart power mode after PMBus programing and power reboot. It can be configured for dual-output or 2-phase operation. 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 TPS40428 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

• Smart Power Mode in Factory
• Default (Compatible with TI Smart Power Stage CSD95378B and Pin-for-Pin Equivalent to TPS40425 –
• Non-Smart Power Mode in Factory Default)
• Single Supply Operation: 4.5 V to 20 VVOUT from 0.6 V
• Dual or Multi-Phase Synchronous Buck Controller
• Individual High-Speed AVS Interface
• Fast Transient ResponseStackable up to Four Phases 2-, 3-, or 4-Phase Interleaved Phase Shifts
• Accurate Current Sharing
• PMBus Interface Capability Margining Up/Down with 2-mV Step
• Programmable Fault Limit and Response±0.8% VOUT
• Accuracy Current Monitoring±3°C External Temperature
• Monitoring In Smart Power ModeProgrammable 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°CProgrammable ƒSW from 200 kHz to 1.5 MHz
• Supports Pre-biased OutputDifferential Remote SensingSynchronization to an Extermal Clock
• OC/OV/UV/OT Fault Protection40-Pin, 6 mm × 6 mm, QFN Package

Typical applications

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

More information

• Datasheet
• IC product information