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SC4624AEVB-MLPQ Datasheet(PDF) 1 Page - Semtech Corporation |
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SC4624AEVB-MLPQ Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 19 page  POWER MANAGEMENT SC4624A Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator The SC4624A 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 SC4624A 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 SC4624A enters the shutdown mode and it consumes less than 1µA of current. The SC4624A is available in 4x4 MLPQ-20 and it is rated over -40°C to +85°C ambient temperature range. Low Voltage Distributed DC-DC Converters Telecommunication Power Supplies Portable Equipment xDSL VIN Range: 2.3 – 5.5V 4A Continuous Output Current Adjustable Output Voltage 0.5V to Vin Low R DS(ON) integrated FETs: 75mΩ and 47mΩ Up to 95% Efficiency Synchronizable and Programmable Frequency: 200kHz – 2MHz Power Good Monitor <1µA of Shutdown Current Programmable Soft Start Programmable Current Limit Over Temperature protection -40 to +85 °C Ambient Temperature Range 4X4mm MLPQ-20 packages- WEEE and RoHS compliant www.semtech.com 1 Revision: July 10, 2008 Description Features Features Typical Application Circuit Applications 5 5 4 4 3 3 2 2 1 1 D D C C B B A A Vout Vin C9 C9 R6 R6 R7 R7 C2 C2 R2 R2 SC4624A SC4624A COMP FB PGOOD SYNC/EN VCC SS FS PH ISET PVIN C1 C1 C3 C3 R4 R4 C11 C11 R9 R9 L1 L1 R8 R8 C8 C8 C5 C5 C7 C7 R5 R5 R3 R3 R11 R11 C4 C4 R1 R1 |
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