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.