TPS54424RNVR

Part: TPS54424 (TPS54424RNVT) — Texas Instruments

Type: Synchronous Buck (Step-Down) Converter

Description: 4.5–17 V input (19 V max), 4 A synchronous SWIFT step-down converter with integrated 14.1 mΩ / 6.1 mΩ MOSFETs, 200 kHz–1.6 MHz switching frequency and 0.6–12 V output range in a 3.5 mm × 3.5 mm HotRod QFN.

Operating Conditions:

• Supply voltage: 4.5–17 V
• Operating junction temperature: -40 to 150 °C
• Output voltage: 0.6–12 V, output current up to 4 A
• Switching frequency: 200–1600 kHz (RT mode and PLL mode)

Absolute Maximum Ratings:

• Max VIN voltage: 19 V
• Max SW voltage: 20 V (23 V for 10 ns transient)
• Max BOOT voltage: 27 V (30 V for 10 ns transient)
• Max junction temperature: 150 °C
• Storage temperature: -55 to 150 °C

Key Specs:

• Feedback reference voltage: 600 mV typ (596–604 mV at TJ = 25 °C; 595–605 mV over TJ range)
• Rds(on): high-side 14.1 mΩ typ (VIN = 12 V, TA = 25 °C); low-side 6.1 mΩ typ (VIN = 12 V, TA = 25 °C)
• High-side peak current limit: 5.6 / 6.8 / 8.5 A (min/typ/max, VIN = 12 V)
• Low-side sourcing current limit: 4.8 / 6.2 / 7.3 A (min/typ/max, VIN = 12 V)
• Operating non-switching supply current: 580 μA typ, 800 μA max (VEN = 5 V, VFB = 1.5 V)
• Shutdown supply current: 3 μA typ, 11 μA max (VEN = 0 V)
• VIN UVLO: 4.1 V typ rising (4.3 V max), 3.9 V typ falling
• Minimum on-time: 90 ns typ, 130 ns max
• Thermal shutdown trip: 170 °C typ, 15 °C hysteresis

Features:

• Peak current mode control with fast transient response
• Synchronizes to external clock (PLL mode)
• Hiccup current limit
• Safe start-up into pre-biased output
• Adjustable soft start and power sequencing (SS/TRK pin)
• Adjustable input undervoltage lockout via EN pin
• Power good output monitor for undervoltage and overvoltage
• Output overvoltage protection
• Non-latch thermal shutdown protection

Applications:

• Telecom and wireless infrastructure
• Test and measurement
• Medical imaging equipment
• Enterprise switching
• Server

Package:

• RNV, 18-pin VQFN-HR (HotRod), 3.50 mm × 3.50 mm

• 1 · Small 3.5-mm × 3.5-mm HotRod™ QFN Package
• Integrated 14.1-m Ω and 6.1-m Ω MOSFETs
• Peak Current Mode Control With Fast Transient Response
• 200-kHz to 1.6-MHz Fixed Switching Frequency
• Synchronizes to External Clock
• 0.6-V Voltage Reference ±0.85% Over Temperature
• 0.6-V to 12-V Output Voltage Range
• Hiccup Current Limit
• Safe Start-Up into Pre-Biased Output Voltage
• Adjustable Soft Start and Power Sequencing
• Adjustable Input Undervoltage Lockout
• 3-μA Shutdown Current
• Power Good Output Monitor for Undervoltage and Overvoltage
• Output Overvoltage Protection
• Non-latch Thermal Shutdown Protection
• -40°C to 150°C Operating Junction Temperature
• Create a Custom Design Using the TPS54424 With the WEBENCH ® Power Designer

• Telecom and Wireless Infrastructure
• Test and Measurement
• Medical Imaging Equipment
• Enterprise Switching
• Server

TJ = -40°C to 150°C, VIN = 4.5 V to 17 V (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The TPS54424 is a synchronous buck converter designed for 4.5 V to 17 V input and 4-A load. This procedure illustrates the design of a high-frequency switching regulator using ceramic output capacitors. Alternatively the WEBENCH ® software can be used to generate a complete design. The WEBENCH ® software uses an interactive design procedure and accesses a comprehensive database of components when generating a design. This section presents a simplified discussion of the design process.