1 Features
• Input voltage range: 0.5V to 5.5V
• 0.7V minimum start-up voltage
• Input operating voltage (PVIN) down to 150mV
with signal AVIN > 0.7V
• Output voltage range: 1.8V to 5.5V for device with
input current limit no more than 1.2A
• Average input current limit: 5mA; 25mA; 50mA;
100mA; 250mA, 500mA, 1.2A, 1.5A (different
versions)
• 95nA typical quiescent current into VOUT
• 60nA typical shutdown current into AVIN
• Up to 88% efficiency at PVIN =AVIN=3.6V, VOUT
= 5V, and IOUT =10μA
• Up to 94% efficiency at PVIN=AVIN = 3.6V, VOUT
= 5V, and IOUT =200mA
• Fast transient performance: setting time ~8μs at
PVIN=AVIN = 3.6V, VOUT = 5V, IOUT = 0A ->
200mA
• True disconnection at EN low
• Automatic PFM/PWM mode transition
• Auto pass-through at AVIN > VOUT
• Output SCP and thermal shutdown protections
• QFN package (3mm x 2.7mm x 1.27mm)

2 Applications
• Smart watch, Smart band
• Portable medical equipment
• TWS
• Optical module

3 Description
The TPSM81299 is a synchronous boost module,
with inductor and converter both incorporated inside,
providing 95nA ultra-low quiescent current and
average input current limit. The device provides a
power product for portable equipment with alkaline
battery and coin cell battery. This device features high
efficiency under light-load condition to achieve long
operation time and average input current limit avoids
battery discharging with high current.
The TPSM81299 has wide input voltage range from
0.5V to 5.5V and output voltage ranges from 1.8V to
5.5V. The device has different versions for average
input current limit from 5mA to 1.5A. The TPSM81299
with 1.2A current limit supports up to 600mA output
current from 3.6V to 5V conversion and achieve
approximately 94% efficiency at 200mA load.
The TPSM81299 has optional fast-load transient
performance at output voltage is 4.5V, 5V or 5.5V.
In fast-load transient mode, the typical setting time is
8μs when output current transient from 0A to 200mA.
The device supports true shutdown function when it is
disabled.
The TPSM81299 offers a very small solution size with
7-pin 3mm x 2.7mm QFN package .