UD05208 Datasheet | Unisonic Technologies

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 ponents 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 250 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 250μs (Typ.) - Adjustable Output Voltage - Thermal Shutdown Protection - Available in SOT25 Package - ORDERING INFORMATION Ordering Number Lead Free Halogen Free UD05208L-AF5-R UD05208G-AF5-R Package SOT-25 Packing Tape Reel .unisonic..tw Copyright © 2018 Unisonic Technologies Co., Ltd 1 of 7 QW-R115-028.a - MARKING Preliminary - PIN CONFIGURATION CMOS IC - PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME EN GND SW VIN FB DESCRIPTION Enable pin H: Normal operation；L: Shutdown Ground Pin Switch pin connected to the internal MOSFET switches and inductor terminal. Connect the inductor of the output filter to this pin. Power...