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參數資料
| 型號： | SC4620 |
| 廠商： | Semtech Corporation |
| 英文描述： | Low Input Voltage, High Efficiency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator |
| 中文描述： | 低輸入電壓，高效率，包2.5a集成FET的同步降壓直流/直流穩壓器 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 1193K |
| 代理商： | SC4620 |
POWER MANAGEMENT
Description
SC4620
Low Input Voltage, High Efficiency, 2.5A Integrated
FET Synchronous Step down DC/DC Regulator
The SC4620 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 2.5A continuous output
current with the output voltage as low as 0.5 Volts. The
internal low R
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 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
logic low is applied to the Enable pin, the SC4620 enters
the shutdown mode and it consumes less than 1μA of
current.
The SC4620 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
2.5A Continuous Output Current
Adjustable Output Voltage 0.5V to Vin
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: June 25, 2007
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
C5
R3
R7
R5
R2
C7
C4
C8
R6
C1
L2
C2
R4
R8
R1
SC4620
COMP
P
FB
PGOOD
SYNC/EN
VCC
SS
ISET
FS
A
PH
PVIN
R9
R11
C3
C11
L1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4620_08 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Input Voltage, High Efficiency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator |
| SC46208 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:1.25MHz, 600mA, HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN DC-DC CONVERTER |
| SC4620810 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:1.25MHz, 600mA, HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN DC-DC CONVERTER |
| SC4620812 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:1.25MHz, 600mA, HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN DC-DC CONVERTER |
| SC4620815 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:1.25MHz, 600mA, HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN DC-DC CONVERTER |
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