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SC4624 Datasheet(PDF) 1 Page - Semtech Corporation

Part No. SC4624
Description  Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator
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Maker  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
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SC4624 Datasheet(HTML) 1 Page - Semtech Corporation

 
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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.
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VIN Range: 2.3 – 5.5V
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4A Continuous Output Current
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Adjustable Output Voltage 0.5V to Vin
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Low R
DS(ON) integrated FETs: 75mΩ and 47mΩ
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Up to 95% Efficiency
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Synchronizable and Programmable Frequency:
200kHz – 2MHz
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Power Good Monitor
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<1µA of Shutdown Current
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Programmable Soft Start
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Programmable Current Limit
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Over Temperature protection
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-40 to +85 °C Ambient Temperature Range
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Starts into pre-biased output
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4x4mm MLPQ-20 and SOIC-16EDP packages-
WEEE and RoHS Compliant
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Low Voltage Distributed DC-DC Converters
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Telecommunication Power Supplies
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Portable Equipment
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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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