参数资料
| 型号： | SC2440TETRT |
| 厂商： | Semtech |
| 文件页数： | 25/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 2A DL 16TSSOP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出数： | 2 |
| 输入电压： | 2.8 V ~ 20 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 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： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-TSSOP |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC2440TEDKR |
SC2440
POWER MANAGEMENT
Typical Application Circuits
R6
100K
R5
C5
FB1
PGOOD1 BOOST1
D3
C6 2.2nF
SW1
22.1K
C7 10pF
33nF
R9
COMP1
SS1
SC2440
SYNC
IN
VIN
20V
C2
0.1 μ F
1N4148
L1
15 μ H
D1
C15 UPS140
47 μ F
C16
C1
10 μ F
X2
R1
205K
R2
51.1K
C11
33pF
C12
10pF
OUT1
5V/2A
ROSC
C10
51.1K
SS2
D4
1N4148
1 μ F
D2
UPS140
33nF C9
L2
OUT2
4.7nF
R7 10pF C8
11.8K
COMP2
FB2
SW2
BOOST2
C4
0.1 μ F
6.8 μ H
C3
10 μ F
R3
40.2K
C13
68pF
1.8V/2A
GND
PGOOD2
R8
100K
X2
R4
49.9K
C15 : 25V El ectrol ytic
All Other Capacitor are C eramic.
L1 : Coiltronic DR74
L2 : Coiltronic DR73
Figure 19(a). 540KHz 20V to 5V and 1.8V Step-down Converter. Notice that Channel 2 is Bootstrapped
from OUT1. This Bootstrapping Scheme Requires OUT1 to be Present at All Times (i.e. No Hiccup
or Shutdown). Channel 2 will still Run if OUT1 is Absent. However its Power Disspation will be High.
V IN = 20V
I OUT1 = 1A
CH1
CH2
I OUT2 = 1A
1 μ s/div
CH1 : SW1 Voltage, 10V/div
CH2 : SW2 Voltage, 10V/div
Figure 19(b). Switching Waveforms.
4ms/div
Upper Trace : V IN , 10V/div
Middle Trace : V OUT1 , 2V/div
Lower Trace : V OUT2 , 1V/div
Figure 19(c). V IN Start Up Transient. I OUT1 = I OUT2 = 1.5A.
? 2005 Semtech Corp.
25
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC2441 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A_09 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441AEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441ATETRT | 制造商:Semtech Corporation 功能描述: |
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