1 Features

1• Buck Converter

– Wide input voltage range 4.5 to 18 V

– Integrated dual buck converter, maximum

continuous current 3.5 A (Buck1) / 2.5 A

(Buck2)

– Feedback reference voltage 0.6 V ±1%

– Adjustable switching frequency 200 kHz to

2 MHz

– Internal built soft start time 2.4 ms

– External clock synchronization

– Cycle-by-cycle current limit

– Power good indicator for each buck

– Continuous current mode (TPS65283) or pulse

skipping mode (PSM) (TPS65283-1) at light

load

• Power distribution switch

– Integrated a power distribution switch with onresistance

60 mΩ

– Operating input voltage range 2.4 to 6 V

– Adjustable current limiting up to 2.7 A

– Current-limit accuracy ±10% at 1.25 A (typical)

– Auto recovery overcurrent protection

– Reverse input to output voltage protection

– Overtemperature protection

– 24-lead VQFN (RGE) 4-mm × 4-mm package

2 Applications

• USB ports and hubs

• Set top box

• Digital TV

• DSL/cable modem, wireless router

• Home gateway and access point networks

• Car infotainment

3 Description

The TPS65283, TPS65283-1 in thermally-enhanced

4-mm × 4-mm VQFN package is a full featured

4.5- to 18-V Vin, 3.5-A/2.5-A output current

synchronous step down DC-DC converter, which is

optimized for small designs through high efficiency

and integrating the high-side and low-side MOSFETs.

The device also incorporates one N-channel

MOSFET power switches for power distribution

systems. This device provides a total power

distribution solution, where precision current limiting

and fast protection response are required.