1 Features

1• Real buck or boost with seamless transition

between buck and boost mode

• 2.5 V to 5.5 V Input voltage range

• 0.5-A Continuous output current: VIN ≥ 2.5 V,

VOUT = 3.3 V

• Adjustable and fixed output voltage version

• Efficiency > 90% in boost mode and > 95% in

buck mode

• 2.5-MHz Typical switching frequency

• Adjustable average input current limit

• Adjustable soft-start time

• Device quiescent current < 60 μA

• Automatic power save mode or forced PWM mode

• Load disconnect during shutdown

• Overtemperature protection

• Small 1.6mm x 1.2mm, 12-pin WCSP and 2.5mm

x 2.5mm 12-pin HotRod™ QFN package

• Create a custom design using the:

– TPS63050 With the WEBENCH® Power

Designer

– TPS63051 With the WEBENCH® Power

Designer

2 Applications

• Cellular and smart phones

• Tablets PC

• PC and smart phone accessories

• Battery powered applications

• Smart grid/smart meter

3 Description

The TPS6305x family of devices is a high efficiency,

low quiescent-current buck-boost converter, suitable

for applications where the input voltage is higher or

lower than the output.

Continuous output current can go as high as 500 mA

in boost mode and as high as 1 A in buck mode. The

maximum average current in the switches is limited to

a typical value of 1 A. The TPS6305x family of

devices regulate the output voltage over the complete

input voltage range by automatically switching

between buck or boost mode depending on the input

voltage, ensuring seamless transition between

modes.

The buck-boost converter is based on a fixedfrequency,

pulse-width-modulation (PWM) controller

using synchronous rectification to obtain the highest

efficiency. At low load currents, the converter enters

Power Save Mode to maintain high efficiency over

the complete load current range.

The PFM/PWM pin allows the user to select between

automatic-PFM/PWM mode operation and forced-

PWM operation. During PWM mode a fixed-frequency

of typically 2.5 MHz is used. The output voltage is

programmable using an external resistor divider, or is

fixed internally on the chip. The converter can be

disabled to minimize battery drain. During shutdown,

the load is disconnected from the battery. The device

is packaged in a 12-pin DSBGA and in a 12-pin

HotRod package.