1 Features

• Input voltage range: 0.5 V to 5.5 V

• 0.7-V minimum input voltage for start-up

• Input operating voltage down to 150 mV with

signal Vin > 0.7 V

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

select output voltage)

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

100 mA; 250 mA, 500 mA, 1.2 A, 1.5 A (different

versions)

• 100 nA typical quiescent current from VOUT

• 60 nA typical shutdown current from VIN and SW

• Up to 91 efficiency at Vin = 3.6 V, Vout = 5 V,

and Iout =10 μA

• Up to 94 efficiency at Vin = 3.6 V, Vout = 5 V,

and Iout =200 mA

• Fast transient performance: setting time ~8 μs at

Vin = 3.6 V, Vout = 5 V, Iout = 0 A -> 200 mA

• True disconnection at EN low

• Automatic PFM/PWM mode transition

• Auto pass-through at Vin > Vout

• Output SCP and thermal shutdown protections

• 6-Pin WCSP (1.2 x 0.8) / SOT563 package (1.6 x

1.6)

2 Applications

• Smart watch, Smart band

• Portable medical equipment

• TWS

3 Description

The TPS61299X is a synchronous boost converter

with 100-nA 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 has wide input voltage range from

0.5 V to 5.5 V and output voltage range from 1.8

V to 5.5 V. The device has different versions for

average input current limit from 5 mA to 1.5 A. The

TPS61299X with 1.2 A current limit can support up to

500 mA output current from 3 V to 5 V conversion and

achieve approximately 94 efficiency at 200 mA load.

The TPS61299X has optional fast load transient

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

In fast load transient, the typical setting time is 8 us

when output current transient from 0 A to 200 mA.

The TPS61299X supports optional force pass through

or true shutdown function when it is disabled, which is

flexible for always-on system.

The TPS61299X offers a very small solution size with

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

1.6-mm x 0.6-mm SOT583 package.