DESCRIPTION
The UTC UD05201 is a 1.2MHz constant frequency current mode
PWM step-down converter. It is ideal for portable equipment
requiring very high current up to 2A from single-cell Lithium-ion
batteries while still achieving over 90% efficiency during peak load
conditions. The UTC UD05201 also can run at 100% duty cycle for
low dropout operation, extending battery life in portable systems
while light load operation provides very low output ripple for noise
sensitive applications. The UTC UD05201 can supply up to 2A
output load current from a 2.6V to 5.5V input voltage and the output
voltage can be regulated as low as 0.6V. The high switching
frequency minimizes the size of external components while keeping
switching losses low. The internal slope compensation setting allows
the device to operate with smaller inductor values to optimize size
and provide efficient operation. The UTC UD05201 is available in
adjustable (0.6V to VIN) output voltage.

FEATURES
* 2.6V~5.5V Input Voltage Range
* Output Voltages from 0.6V to VIN
* High Efficiency: Up to 96%
* 1.2MHz Constant Frequency Operation
* Up to 2A Output Current
* No Schottky Diode Required
* Low RDS(ON) Internal Switches: 0.15Ω
* Current Mode Operation for Excellent Line and Load
Transient Response
* Current limit, Enable function
* Short Circuit Protect (SCP)
* Build-in Soft Start function
* ≤ 1μA Shutdown Current