TPS63802DLARG4中文资料德州仪器数据手册PDF规格书

1 Features

• Input voltage range: 1.3 V to 5.5 V

– Device input voltage > 1.8 V for start-up

• Output voltage range: 1.8 V to 5.2 V (adjustable)

• 2-A output current for VI ≥ 2.3 V, VO = 3.3 V

• High efficiency over the entire load range

– 11-μA operating quiescent current

– Power save mode and mode selection for

forced PWM-mode

• Peak current buck-boost mode architecture

– Defined transition points between buck, buckboost,

and boost operation modes

– Forward and reverse current operation

– Start-up into pre-biased outputs

• Safety and robust operation features

– Integrated soft start

– Overtemperature- and overvoltage-protection

– True shutdown function with load disconnect

– Forward and backward current limit

• Small solution size of 21.5 mm2

– Tiny SON/DFN package (similar to QFN)

– Small 0.47-μH inductor

– Works with a 22-μF minimum output capacitor

• Create a custom design using the TPS63802 with

the WEBENCH® Power Designer

2 Applications

• System pre-regulator (tracking and telematics,

portable POS, home automation, IP network

camera)

• Point-of-load regulation (wired sensor, port/cable

adapter and dongle, electronic smart lock, IoT)

• Battery back-up supply (electricity meter, data

concentrator, power quality meter)

• Thermoelectric device supply (TEC, optical

modules)

• General purpose voltage stabilizer and converter

3 Description

The TPS63802 is a high efficiency, high output current

buck-boost converter. Depending on the input voltage,

it automatically operates in boost, buck, or in a novel

4-cycle buck-boost mode when the input voltage is

approximately equal to the output voltage. The

transitions between modes happen at defined

thresholds and avoid unwanted toggling within the

modes to reduce output voltage ripple. The device

output voltages are individually set by a resistive

divider within a wide output voltage range. An 11-μA

quiescent current enables the highest efficiency for

little to no-load conditions.