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SC4624SETRT Datasheet(PDF) 1 Page - Semtech Corporation |
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SC4624SETRT Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 20 page  POWER MANAGEMENT SC4624 Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator 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 R DS(ON) synchronous power switches eliminate the need for external Schottky diode while delivering overall converter efficiency up to 95%. A power good pin is available to monitor the output voltage status. Operating frequency is adjustable from 200 kHz 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. u VIN Range: 2.3 – 5.5V u 4A Continuous Output Current u Adjustable Output Voltage 0.5V to Vin u Low R DS(ON) integrated FETs: 75mΩ and 47mΩ u Up to 95% Efficiency u Synchronizable and Programmable Frequency: 200kHz – 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 RoHS Compliant u Low Voltage Distributed DC-DC Converters u Telecommunication Power Supplies u Portable Equipment u xDSL www.semtech.com 1 Revision: July 24, 2007 Description Features Features Typical Application Circuit Applications Vout Vin C8 C8 L2 L2 R6 R6 R7 R7 R4 R4 C2 C2 C11 C11 R2 R2 SC4624 SC4624 COMP FB PGOOD SYNC/EN VCC SS FS PH ISET PVIN C1 C1 C3 C3 R9 R9 L1 L1 C5 C5 C7 C7 R8 R8 R5 R5 R3 R3 C9 C9 R11 R11 C4 C4 R1 R1 |
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