Description:

The TPS54824 is a fully featured 17V, 8A synchronous buck converter housed in a 3.5mm × 3.5mm HotRod™ QFN package. The device is specifically optimized for high efficiency and integrates both high-side and low-side MOSFETs, making it suitable for small-form-factor solutions. It further saves space by employing peak current-mode control, which reduces component count, and by offering a high switching frequency option that allows for a smaller inductor. Peak current-mode control simplifies loop compensation and provides fast transient response. In the event of an overload, cycle-by-cycle peak current limiting on both the high-side and low-side sourcing current limits protects the device. Hiccup mode limits MOSFET power dissipation under sustained short-circuit or overload faults. A power-good monitoring circuit supervises the regulator output. The PGOOD pin is an open-drain output that enters a high-impedance state during output voltage regulation. An internal blanking time prevents the PGOOD pin from being pulled low unless a fault condition occurs. A dedicated EN pin can be used to control regulator on/off and to adjust the input undervoltage lockout. The output voltage startup ramp is controlled by the SS/TRK pin, which supports both independent power supply operation and tracking mode.

Features:

• Small 3.5mm × 3.5mm HotRod™ Quad Flat No-Lead (QFN) package

• Integrated 14.1mΩ and 6.1mΩ MOSFETs

• Peak current-mode control for fast transient response

• Fixed switching frequency from 200kHz to 1.6MHz

• Synchronization with an external clock

• 0.6V voltage reference with ±0.85% accuracy over a wide temperature range

• Output voltage range: 0.6V to 12V

• Hiccup current limiting

• Safe startup to pre-biased output voltage

• Adjustable soft-start and power sequencing

• Adjustable input undervoltage lockout

• 3µA shutdown current

• Power-good output monitoring for undervoltage and overvoltage

• Output overvoltage protection

• Non-latching thermal shutdown protection

• Operating junction temperature range: –40°C to +150°C

• Supported by WEBENCH® Design Center

Applications:

• Telecommunications and wireless infrastructure

• Industrial automation and test equipment

• Enterprise switching and storage applications

• High-density distributed power systems