1 Features
1• 4.5-V to 18-V Wide Input Voltage Range
• Programmable Slew Rate Control for Output
Voltage Transition
• Up to 5-A Maximum Continuous Output Current in
Buck 1 and Buck 2
• Buck 1 and Buck 2 can be Paralleled to Deliver up
to 10-A Current
• Pulse Skipping Mode to Achieve High Efficiency in
Light Load
• Adjustable Switching Frequency
200 kHz to 1.6 MHz Set by External Resistor
• Dedicated Enable and Soft-Start for Each Buck
• Peak Current-Mode Control With Simple
Compensation Circuit
• Cycle-by-Cycle Overcurrent Protection
• 180° Out-of-Phase Operation to Reduce Input
Capacitance and Power Supply Induced Noise
• Over Temperature Protection
• Available in 32-Pin Thermally Enhanced HTSSOP
(DAP) and 36-Pin VQFN 6-mm × 6-mm (RHH)
Packages

2 Applications
• DTV
• Telecom and Network
• Point-of-Load
• Set Top Boxes
• Tablet PC

3 Description
TPS65279 is a monolithic dual synchronous buck
converter with wide 4.5-V to 18-V operating 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 control is designed to simplify its
application while giving the designers options to
optimize their usage according to the target applications.
Two bucks in TPS65279 can be paralleled to delivery
up to 10-A load current by using current sharing mode, connect ISHARE pin high. Two phase
operation in current sharing reduces system filtering
capacitance and inductance, alleviates EMI and
improves output voltage ripple and noise.
TPS65279 features a dedicated enable pin. An
independent soft-start pin provides flexibility in power
up programmability. Constant frequency peak current
mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle
overcurrent protection and hiccup mode operation
limit MOSFET power dissipation in short circuit or
over loading fault conditions.