SC4624AMLTRT Semtech

SC4624A Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator POWER MANAGEMENT Features Description Features VIN Range: 2.3 5.5V The SC4624A is a highly integrated synchronous step- 4A Continuous Output Current down DC/DC regulator designed for low input voltage Adjustable Output Voltage 0.5V to Vin range of 2.3V to 5.5 Volts. It can deliver 4A continuous Low R integrated FETs: 75m and 47m output current with the output voltage as low as 0.5 Volts. DS(ON) Up to 95% Efficiency The internal low R synchronous power switches DS(ON) Synchronizable and Programmable Frequency: eliminate the need for external Schottky diode while 200kHz 2MHz delivering overall converter efficiency up to 95%. Power Good Monitor <1A of Shutdown Current A power good pin is available to monitor the output voltage Programmable Soft Start status. Operating frequency is adjustable from 200 kHz Programmable Current Limit to 2MHz with a single resistor and it can be synchronized Over Temperature protection to an external clock. -40 to +85 C Ambient Temperature Range 4X4mm MLPQ-20 packages- WEEE and RoHS The SC4624A offers adjustable current limit, soft start and compliant 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 SC4624A enters the shutdown mode and it consumes less than 1A of Low Voltage Distributed DC-DC Converters current. Telecommunication Power Supplies Portable Equipment The SC4624A 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 SYNC/EN RR77 RR66 CC99 PGOOD RR88 CC44 C C FB RR22 VCC CC33 RR99 RR11 CC11 SCSC44662244AA 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 PGNDSC4624A POWER MANAGEMENT 5 4 3 2 1 Pin Configuration Ordering Information Device Top Mark Package Top View D D SC (1) (2) SC4624AMLTRT MLPQ-20 4624A SC4624AEVB-MLPQ Evaluation Board 20 16 Notes: 1 PVIN 15 PGND (1) Available in tape and reel only. A reel contains 3,000 devices for MLPQ-20 C C package. PGND 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