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.