Texas Instruments TPS40422

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 is implemented to reduce 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.

Features

• Single Supply Operation: 4.5 V to 20 V
• Output Voltage from 0.6 V to 5.6 V
• Dual or Two-Phase Synchronous Buck Controller
• PMBus Capability
• Margining Up/Down with 2-mV Step
• Programmable Fault Limit and Response
• Output Voltage, Output Current Monitoring
• External Temperature Monitoring with 2N3904
• Programmable UVLO ON/OFF Thresholds
• Programmable Soft Start Time and Turn On/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 from 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
• OC/OV/UV/OT Fault Protection
• 40-Pin, 6 mm × 6 mm, QFN Package

Typical applications

• Telecom Base Station
• Switcher/Router Networking
• Multiple Rail Systems
• Server and Storage System

More information

• Datasheet
• IC product information