SC4620 Datasheet | SEMTECH

Low Input Voltage, High Efficiency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator POWER MANAGEMENT Description The SC4620 is a highly integrated synchronous step-down DC/DC regulator designed for low input voltage range of 2.3V to 5.5 Volts. It can deliver 2.5A continuous output current with the output voltage as low as 0.5 Volts. The internal low RDS(ON) synchronous power switches eliminate the need for external Schottky diode while delivering overall converter efficiency up to 95%. .. Features u VIN Range: 2.3 - 5.5V u 2.5A Continuous Output Current u Adjustable Output Voltage 0.5V to Vin u Up to 95% Efficiency u Synchronizable and Programmable Frequency: 200k Hz - 2MHz u Power Good Monitor u <1µA of Shutdown Current u Programmable Soft Start u Programmable Current Limit u Over Temperature protection u -40 to +85 °C Ambient Temperature Range u 4X4mm MLPQ-20 packages- WEEE and Ro HS pliant A power good pin is available to monitor the output voltage status. Operating frequency is adjustable from 200 k Hz to 2MHz with a single resistor and it can be synchronized to an external clock. The SC4620 offers adjustable current limit, soft start and over temperature protection to safeguard the device under extreme operating conditions. The soft start provides a controlled output voltage ramp up at startup. When a logic low is applied to the Enable pin, the SC4620 enters the shutdown mode and it consumes less than 1µA of current. The SC4620 is available in 4x4 MLPQ-20 and it is rated over -40°C to +85°C ambient temperature range. Applications - Low Voltage Distributed DC-DC Converters - Telemunication Power Supplies - Portable Equipment - x DSL Typical Application Circuit 5 4 3 2 1 R4 C11 L1 Vin PVIN R5 C9 R6 R2 C3 SYNC/EN PGOOD VCC FB PH Vout R7 R8 C8 C4 SS ISET FS R1 C2 R9 C1 L2 AGND C7 C5 R3 R11 PGND Revision: June 25,...