1 Features

• Input voltage range: 1.8 V to 5.5 V

• Output voltage range: 1.8 V to 5 V (100-mV steps)

– Programmable with external resistors

– SEL pin to toggle between two output voltage

presets

• > 400-mA output current for VI ≥ 2.0 V, VO = 3.3 V

(typical 1.45-A peak switching current limit)

– Stackable: parallel multiple devices for higher

output current

• > 90% Efficiency at 10-μA load current

– 75-nA quiescent current

– 60-nA shutdown current

• Single-mode operation

– Eliminates mode transitions between buck,

buck-boost and boost operation

– Low output ripple

– Excellent transient performance

• Safety and robust operation features

– Integrated soft start

– Programmable input current limit with eight

settings (1 mA to 100 mA and unlimited)

– Output short-circuit and overtemperature

protection

• Tiny solution size of 21-mm2

– Small 2.2-μH inductor, single 22-μF output

capacitor

– 10-Pin, 2.5-mm × 2.5-mm, 0.5-mm pitch WSON

package

2 Applications

• Smart meters and sensor nodes

• Electronic smart locks

• Medical sensor patches and patient monitors

• Wearable electronics

• Asset tracking

• Industrial IoT (smart sensors) / NB-IoT

3 Description

The TPS63900 device is a high-efficiency

synchronous buck-boost converter with an extremely

low quiescent current (75 nA typical). The device has

32 user-programmable output voltage settings from

1.8 V to 5 V.

A dynamic voltage-scaling feature lets applications

switch between two output voltages during operation;

for example, to save power by using a lower system

supply voltage during standby operation.

With its wide supply voltage range and programmable

input current limit (1 mA to 100 mA and unlimited), the

device is ideal for use with a wide range of primary

like 3S Alkaline, 1S Li-MnO 2 or 1S Li-SOCl 2, and

secondary battery types.

The high-output current capability supports

commonly-used RF standards like sub-1-GHz, BLE,

LoRa, wM-Bus, and NB-IoT.