1 Features

• Input voltage range: 1.8V to 5.5V

– 2.0V minimum input voltage for start-up

• VOUT range: I2C-configurable 1.2V to 5.5V with

25mV step

• Output current

– Up to 3.5A for VIN ≥ 2.5V, VOUT = 3.3V

– Up to 4A for VIN ≥ 3V, VOUT = 3.3V

• High efficiency over the entire load range

– Low 2.3μA operating quiescent current

– Automatic power save mode, ultra-sonic mode,

and forced PWM mode

– 91.94% efficiency at VIN = 3.6V, VOUT = 3.3V,

IOUT = 100μA (in buck-boost mode)

– 95.33% efficiency at VIN = 3.6V, VOUT = 3.3V,

IOUT = 2A (in buck-boost mode)

• Supports 1.2V logic I/O

• Three I2C target addresses available by ADDR pin

connection

• Programmable soft start time, current limit, and

buck-boost window

• Output discharge function

• Safety and robust protection features

– Overtemperature protection

– Input and output overvoltage protection

– True load disconnect during shutdown

– Forward and backward current limit

– Hiccup protection

• Two device options:

– TPS63820: Pre-programmed 3.3V VOUT

– TPS638201: Program VOUT prior to start-up

• 15-ball WCSP package (2.0mm × 1.2mm)

2 Applications

• System pre-regulator

• Point-of-load regulation

• Optical modules

• Broadband network radio or SoC supply

3 Description

The TPS63820 and TPS638201 are low quiescent

current, high output current buck-boost converters

fully programmable through I2C. The 2.3μA quiescent

current and four low Rdson MOSFETs enable high

efficiency from a light to a heavy load range.

Depending on the input voltage, the devices

automatically operate in boost, buck, or in buck-boost

mode when the input voltage is approximately equal

to the output voltage. The transitions between modes

occur at defined thresholds and avoid unwanted

toggling within the modes which reduces output

voltage ripple.

The devices have a fast dynamic response, which

enables the regulation of output voltage tightly, even

in the event of heavy load transients.

The devices offer a small solution size in WCSP.

The solution size is <20mm2 with only four external

components.