参数资料
| 型号： | SC2440TETRT |
| 厂商： | Semtech |
| 文件页数： | 22/26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
Applications Information
input pins. Shortening the traces of the SW and BOOST
nodes reduces the parasitic trace inductance at these
nodes. This not only reduces EMI but also decreases
switching voltage spikes at these nodes.
V IN
V OUT
Z L
Figure 15. Fast Switching Current Paths in a Buck
Regulator. Minimize the size of this loop
to reduce parasitic trace inductance.
GND
Figures 16(a) and 16(b) shows how various external
components are placed around the SC2440. The
frequency-setting resistor is placed next to the ROSC pin
on the backside. The resistor is grounded to the ground
plane, which is then tied to anodes of the freewheeling
diodes with vias. These precautions reduce switching
noise pickup at the ROSC pin.
To ensure proper adhesion to the ground plane, avoid
using vias directly under the device. In figure 15 two
12mil vias are placed at the edge of the underside pad.
R5
C5
C8
R7
R1
R2
C6
R6
C7
C10
R8
C9
R4
R3
GND
U1
R9
D3
C2
VIN
C4
D4
GND
L1
D1
D2
L2
C15
VOUT1
C1
GND
C3
VOUT2
(a)
(b)
Figure 16. Suggested PCB Layout for the SC2440. Notice that there is no via directly under
the device and that the only component on the backside is the frequency-setting
resistor. All vias are 12mil in diameter.
? 2005 Semtech Corp.
22
www.semtech.com
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相关代理商/技术参数 |
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| 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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