SC4620MLTRT Semtech

SC4620 Low Input Voltage, High Efficiency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator POWER MANAGEMENT Features Description Features VIN Range: 2.3 5.5V The SC4620 is a highly integrated synchronous step-down 2.5A Continuous Output Current DC/DC regulator designed for low input voltage range of Adjustable Output Voltage 0.5V to Vin 2.3V to 5.5 Volts. It can deliver 2.5A continuous output Up to 95% Efficiency current with the output voltage as low as 0.5 Volts. The Synchronizable and Programmable Frequency: internal low R synchronous power switches eliminate DS(ON) 200kHz 2MHz the need for external Schottky diode while delivering Power Good Monitor overall converter efficiency up to 95%. <1A of Shutdown Current Programmable Soft Start A power good pin is available to monitor the output voltage Programmable Current Limit status. Operating frequency is adjustable from 200 kHz Over Temperature protection to 2MHz with a single resistor and it can be synchronized -40 to +85 C Ambient Temperature Range to an external clock. 4X4mm MLPQ-20 packages- WEEE and RoHS compliant 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 Applications logic low is applied to the Enable pin, the SC4620 enters the shutdown mode and it consumes less than 1A of Low Voltage Distributed DC-DC Converters current. Telecommunication Power Supplies Portable Equipment The SC4620 is available in 4x4 MLPQ-20 and it is rated xDSL over -40C to +85C ambient temperature range. Typical Application Circuit 5 4 3 2 1 RR44 CC1111 D D Vin L1L1 Vout PVIN PH RR55 CC88 RR77 SYNC/EN RR66 CC99 PGOOD RR88 CC44 C C FB RR22 VCC RR99 CC33 RR11 CC11 SCSC44662200 CC22 SS B B ISET FS COMP CC77 CC55 RR33 RR1111 A A 5 4 3 2 1 Revision: July 10, 2008 www.semtech.com 1 AGND PGNDSC4620 POWER MANAGEMENT 5 4 3 2 1 Pin Configuration Ordering Information Device Top Mark Package Top View D D SC (1) (2) SC4620MLTRT MLPQ-20 4620 SC4620EVB-MLPQ Evaluation Board 20 16 1 Notes: PVIN 15 PGND (1) Available in tape and reel only. A reel contains 3,000 devices for MLPQ-20 C C PGND package. PVIN (2) Available in lead-free package only. Device is WEEE and RoHS compliant. ISET T AGND SS VCC FS 5 FB 11 6 10 B B 20Pin MLPQ A A = 29C/W = 2.5C/W. JA JC 5 4 3 2 1 2008 Semtech Corp. www.semtech.com 2 PGOOD NC VCC NC NC PH SYNC/EN PH COMP PH