1 Features

• Input voltage range: 0.5V to 5.5V

• 0.7V minimum start-up voltage for TPS61299x

• 0.9V minimum start-up voltage for TPS61299xA

• Input operating voltage down to 150mV with signal

VIN > 0.7V for TPS61299x

• Input operating voltage down to 150mV with signal

VIN > 0.9V for TPS61299xA

• Output voltage range: 1.8V to 5.5V VSEL pin

select output voltage

• Average input current limit: 5mA; 25mA; 50mA;

100mA; 250mA, 500mA, 1.2A, 1.9A

(different versions)

• 95nA typical quiescent current from VOUT

• 60nA typical shutdown current from VIN to GND

for TPS61299x

• 30nA typical force pass through current from VIN

to GND for TPS61299xA

• Up to 91% efficiency at VIN = 3.6V, VOUT = 5V, and

IOUT =10μA

• Up to 94% efficiency at VIN = 3.6V, VOUT = 5V, and

IOUT =200mA

• Fast transient performance: setting time ~8μs at

VIN = 3.6V, VOUT = 5V, IOUT = 0A -> 200mA

• True disconnection at EN low for TPS61299x

• Force pass through at EN low for TPS61299xA

• Automatic PFM/PWM mode transition

• Auto pass-through at VIN > VOUT

• Output SCP and thermal shutdown protections

• 6-Pin WCSP (1.2mm x 0.8mm) / SOT563 package

(1.6mm x 1.6mm)

2 Applications

• Smart watch, Smart band

• Portable medical equipment

• TWS

3 Description

The TPS61299x/xA is a synchronous boost converter

with 95nA ultra-low quiescent current and average

input current limit. The device provides a power

solution for portable equipment with alkaline battery

and coin cell battery. This device has high efficiency

under light-load condition to achieve long operation

time and average input current limit can avoid battery

discharging with high current.

The TPS61299x/xA has wide input voltage range from

0.5V to 5.5V and output voltage range from 1.8V to

5.5V. The device has different versions for average

input current limit from 5mA to 1.9A. The TPS61299

with 1.2A current limit can support up to 500mA

output current from 3V to 5V conversion and achieve

approximately 94% efficiency at 200mA load.

The TPS61299x/xA has optional fast-load transient

performance at output voltage is 4.5V, 5V or 5.5V. In

fast-load transient, the typical setting time is 8μs when

output current transient from 0A to 200mA.

The TPS61299x supports true shutdown function

when it is disabled. And TPS61299xA supports force

pass through function when it is disabled. Customer

could choose either one for specific application.

The TPS61299x/xA offers a very small solution size

with 6-ball 1.2mm x 0.8mm WCSP package and 6-pin

1.6mm x 1.6mm SOT563 package.