TPS54A24RTWR

1 Features

· Standard 4-mm× 4-mm WQFN package

· -40℃ to+150℃ Operating junction temperature

· 200-kHz to 1.6-MHz Fixed switching frequency

· Peak-current-mode control

· Synchronizes to external clock

· 0.6-V Voltage reference ±0.85% over temperature

· 0.6-Vto 12-V Output voltage range

· Safe start-up into prebiased output voltage

· Hiccup current limit

· Adjustable soft start and power sequencing

· Adjustable input undervoltage lockout

· Power-good output monitor for undervoltage and overvoltage

· 3-uA Shutdown current

· Output overvoltage protection

· Non-latch thermal shutdown protection

· Create a custom design using the TPS54A24 with the WEBENCH Power Designer

2 Applications

· Wired networking(switches)

· Wireless infrastructure

· Test and measurement

· Medical imaging equipment

· Power for FPGAs,SOCs,DSPs and processors

3 Description 

The TPS54A24 is a full-featured 17-V,10-A synchronous step-down DC/DC converter in a standard 4mm×4 mm WQFN 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 requlation. An internal deglitch time prevents the PGOOD pin from puling 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.

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