1 Features

• Operating input voltage range 4.5 V to 17 V

• Feedback reference voltage 0.6 V ±1.33%

• Continuous output current 5 A/3 A/2 A

• Adjustable clock frequency from 250 kHz to

2.3 MHz

• External synchronization oscillator

• 120° out of phase for Buck1, Buck2, Buck3

• Dedicated enable pins for each buck

• Fixed SS time for each buck (2.4 ms)

• Automatic power-up, power-down sequence and

adjustable interval time between bucks (6

combinations)

• Support Pulse Skipping Mode (PSM) and Forced

Continuous Current Mode (FCCM)

• Output voltage power-good indicator and

adjustable delay time

• Thermal overloading protection

• 32-pin QFN (RHB) 5-mm × 5-mm package

2 Applications

• DTV

• Set-top boxes/OTT

• Home gateway and access point networks

• Surveillance

3 Description

The TPS65265 incorporates triple synchronous buck

converters with 4.5-V to 17-V wide input voltage range

that encompassed most intermediate bus voltage

operating off 5-, 9-, 12- or 15-V power bus or

battery. The converter with constant frequency peak

current mode is designed to simplify its application

while giving designers options to optimize the system

according to targeted applications. The switching

frequency of the converters can be adjustable from

250 kHz to 2.3 MHz with an external resistor or

external clock. 120° out-of-phase operation between

Buck1, Buck2, and Buck3 minimizes the input filter

requirements.

The TPS65265 operates in pulse skipping mode

(PSM) with driving MODE pin to high or leaving

float and operates in force continuous current mode

(FCC) with connecting MODE pin to GND. PSM

mode provides high efficiency by reducing switching

losses at light load and FCC mode reduces noise

susceptibility and RF interference.

The TPS65265 is available in a 32-pin thermal

enhanced QFN (RHB) 5-mm × 5-mm thin package.