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, 1.9A (different
versions)
• 95-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 TPS61299 is a synchronous boost converter with
95-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 TPS61299 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 1.9 A. The TPS61299
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 TPS61299 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 μs
when output current transient from 0 A to 200 mA.
The TPS61299 supports optional force pass through
or true shutdown function when it is disabled, which is
flexible for always-on system.
The TPS61299 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 SOT563 package.