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参数资料
| 型号： | SC4501MSETRT |
| 厂商： | Semtech |
| 文件页数： | 4/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 2A 8MSOP |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 32V |
| 输入电压： | 1.4 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 2A |
| 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）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MSOP-EP |
| 其它名称： | SC4501MSEDKR |
SC4501
POWER MANAGEMENT
Pin Diagram
Block Descriptions (MSOP-8)
Pin
1
2
3
4
5
6
7
8
Pin Name
COMP
FB
SHDN
GND
SW
IN
ROSC
SS
Exposed Pad
Pin Function
The output of the internal transconductance error amplifier. This pin is used for loop compensation.
The inverting input of the error amplifier. Tie to an external resistive divider to set the output voltage.
Shutdown Pin. The accurate 1.1V shutdown threshold and the 4.6uA shutdown pin current
hysteresis allow the user to set the undervoltage lockout threshold and hysteresis for the switching
regulator. Pulling this pin below 0.1V causes the converter to shut down to low quiescent current.
Tie this pin to IN if the UVLO and the shutdown features are not used. This pin should not be left
floating.
Ground. Tie to the ground plane.
Collector of the internal power transistor. Connect to the boost inductor and the rectifying diode.
Power Supply Pin. Bypassed with capacitors close to the pin.
A resistor from this pin to the ground sets the switching frequency.
Soft-Start Pin. A capacitor from this pin to the ground lengthens the start-up time and reduces start-
up current.
The exposed pad must be soldered to the ground plane on the PCB for good thermal conduction.
Block Diagram
IN
6
SW
5
4.6 μ A
SHDN
3
+
-
CMP
INTERNAL
SUPPLY
REG
1.1V
VOLTAGE
REFERENCE
THERMAL
SHUTDOW N
ENABLE
CLK
FB
2
COMP
1.242V
+
-
EA
REG
-
PWM
+
R
S
Q
1
1.5 μ A
SS
8
REG_GOOD
ILIM
+
-
I-LIMIT
R SENSE
ENABLE
Σ
+
+
+
ISEN
-
ROSC
CLK
OSCILLATOR
SLOP E COMP
4
7
Figure 2. SC4501 (MSOP-8) Block Diagram.
GND
2011
? 2005 Semtech Corp.
4
www.semtech.com
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