SC4624 Datasheet | SEMTECH

Description The SC4624 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 4A 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 4A Continuous Output Current u Adjustable Output Voltage 0.5V to Vin u Low RDS(ON) integrated FETs: 75mΩ and 47mΩ 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 Starts into pre-biased output u 4x4mm MLPQ-20 and SOIC-16EDP 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 SC4624 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 SC4624 enters the shutdown mode and it consumes less than 1µA of current. The SC4624 is available in 4x4 MLPQ-20 and SOIC-16EDP package, 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 R4 C11 L1 R5 C9 R6 R2 C3 PVIN SYNC/EN PGOOD VCC FB R1 R9 C1 L2 PH R7 R8 C8 C4 Vin Vout SS ISET FS P C2 AGND Revision: July 24, 2007 PGND C7 C5 R3 R11 .semtech. POWER MANAGEMENT Pin Configuration 5 4 D Ordering Information Device Top Mark SC 4624...