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参数资料
| 型号： | SC4503WLTRT |
| 厂商： | Semtech |
| 文件页数： | 3/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1.4A 8MLPD |
| 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 27V |
| 输入电压： | 2.5 V ~ 20 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.3MHz |
| 电流 - 输出： | 1.4A |
| 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-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MLPD（2x2） |
| 其它名称： | SC4503WLDKR |
SC4503
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless speci ? ed: V IN = V SHDN/SS = 3V, -40°C < T A = T J < 85°C
Parameter
SHDN/SS Switching Threshold
Conditions
V FB = 0V
Min
Typ
1.4
Max
Units
V
Shutdown Input High Voltage
Shutdown Input Low Voltage
2
0.4
V
V SHDN/SS = 2V
22
50
SHDN/SS Pin Bias Current
V SHDN/SS = 1.8V
20
45
μ A
Thermal Shutdown Temperature
V SHDN/SS = 0V
155
0.1
°C
Thermal Shutdown Hysteresis
Pin Con ? guration - TSOT - 23
Ordering Information
10
Top View
Device (1,2)
Top Mark
Package
SW
1
5
IN
SC4503TSKTRT
BH00
TSOT-23
GND
2
SC4503EVB
Evaluation Board
FB
3
4
SHDN/SS
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Available in lead-free package only. Device is WEEE and
5-LEAD TSOT-23
Pin Descriptions - TSOT -23
RoHS compliant.
Pin
1
2
3
Pin Name
SW
GND
FB
Pin Functions
Collector of the internal power transistor. Connect to the boost inductor and the freewheeling
diode. The maximum switching voltage spike at this pin should be limited to 34V.
Ground. Tie to ground plane.
The inverting input of the error ampli ? er. Tie to an external resistive divider to set the output volt-
age.
Shutdown and Soft-start Pin. Pulling this pin below 0.4 shuts down the converter. Applying more
than 2V at this pin enables the SC4503. An external resistor and an external capacitor con-
nected to this pin soft-start the switching regulator. The SC4503 will try to pull the SHDN/SS pin
4
SHDN/SS below its 1.4V switching threshold regardless of the external circuit attached to the pin if VIN
is below the under-voltage lockout threshold. Tie this pin through an optional resistor to IN or
to the output of a controlling logic gate if soft-start is not used. See Applications Information for
more details.
5
IN
Power Supply Pin. Bypassed with capacitor close to the pin.
? 2007 Semtech Corp.
3
www.semtech.com
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相关代理商/技术参数 |
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| SC4505 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4505_07 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4505EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4505EVB-1 | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD |
| SC4505EVB-2 | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD |
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