参数资料
| 型号： | SC4620MLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2.5A 20MLPQ |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.5 V ~ 5.5 V |
| 输入电压： | 2.3 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz ~ 2MHz |
| 电流 - 输出： | 2.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 包装： | 标准包装 |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 其它名称： | SC4620MLDKR |
SC4620
Low Input Voltage, High Efficiency, 2.5A Integrated
FET Synchronous Step down DC/DC Regulator
POWER MANAGEMENT
Description
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 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 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.
Typical Application Circuit
Features
? 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
Applications
? Low Voltage Distributed DC-DC Converters
? Telecommunication Power Supplies
? Portable Equipment
? xDSL
5
4
3
2
1
D
Vin
R4
PVIN
C11
PH
L1
Vout
D
C
C9
R5
R6
R2
SYNC/EN
PGOOD
VCC
FB
R7
R8
C8
C4
C
C3
SC4620
R1
C1
R9
C2
B
A
C7
C5
R3 R11
SS
ISET
FS
COMP
B
A
Revision: July 10, 2008
5
4
1
3
2
1
www.semtech.com
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| SC4624AMLTRT | 功能描述:IC REG BUCK ADJ 4A 20MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
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