DESCRIPTION
UTC UD05208 devices are synchronous step-down converters
optimized for small solution size and high efficiency. The devices
integrate switches capable of delivering an output current up to 2A.
The devices are based on an adaptive on time with valley current
mode control scheme. Typical operating frequency is 1.5MHz at
medium to heavy loads. The devices are optimized to achieve very
low output voltage ripple even with small external components and
feature an excellent load transient response. During a light load,
the UD05208 automatically enter into Power Save Mode at the
lowest quiescent current (50μA typ) to maintain high efficiency over
the entire load current range. In shutdown, the current consumption
is reduced to 1μA. The UD05208 provide an adjustable output
voltage via an external resistor divider. The output voltage start-up
ramp is controlled by an internal soft start, typically 300 μs. Power
sequencing is possible by configuring the Enable pin. Other
features like over current protection and over temperature
protection are built in.

 FEATURES
* 2.7V to 5.5V Input Voltage Range
* 1.5MHz Typical Switching Frequency
* Output Current up to 2A
* Adaptive On-Time Current Control
* Power Save Mode for Light Load Efficiency
* 50μA Operating Quiescent Current
* Over Current Protection
* Internal Soft Startup of 300μs (Typ.)
* Adjustable Output Voltage
* Thermal Shutdown Protection