Texas Instruments TPS54424

Description

The TPS54424 is a full featured 17-V, 4-A synchronous step-down DC/DC converter in a 3.5 mm x 3.5 mm HotRod™ QFN package.The device is optimized for small solution size through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through peak current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor footprint.The peak current mode control simplifies the loop compensation and provides fast transient response. Cycle-by-cycle peak current limiting on the high-side and low-side sourcing current limit protects the device in overload situations. Hiccup limits MOSFET power dissipation if a short circuit or over loading fault persists. A power good supervisor circuit monitors the regulator output. The PGOOD pin is an open-drain output and goes high impedance when the output voltage is in regulation. An internal deglitch time prevents the PGOOD pin from pulling low unless a fault has occurred. A dedicated EN pin can be used to control the regulator on/off and adjust the input undervoltage lockout. The output voltage start-up ramp is controlled by the SS/TRK pin, which allows operation as either a standalone power supply or in tracking situations.

Features

• Small 3.5-mm x 3.5-mm HotRod™ QFN Package
• Integrated 14.1-mΩ and 6.1-mΩ 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 Startup into Pre-Biased Output Voltage
• Adjustable Soft-start and Power Sequencing
• Adjustable Input Under Voltage 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

Typical applications

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

More information

• Datasheet
• IC product information