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參數(shù)資料
| 型號(hào)： | SC2440TETRT |
| 廠商： | Semtech Corporation |
| 英文描述： | 2.5 MHz Dual Switching Regulator with Integrated 2A Switches |
| 中文描述： | 2.5 MHz雙開關(guān)穩(wěn)壓器集成甲開關(guān) |
| 文件頁數(shù)： | 22/26頁 |
| 文件大?。?/td> | 643K |
| 代理商： | SC2440TETRT |
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22
2005 Semtech Corp.
www.semtech.com
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.
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.
IN
V
OUT
V
L
Z
Fast Switching Current Paths in a Buck
Regulator. Minimize the size of this loop
to reduce parasitic trace inductance.
Figure 15.
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.
Figure 16.
(a)
R9
GND
(b)
GND
VIN
C2
L2
D3
L1
C4
D4
D1
D2
C15
C1
C3
R3
R4
C9
C8
R7
R8
C7
R6
C6
C5
R5
R2
R1
VOUT2
VOUT1
GND
U1
C10
GND
V
V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC2441A | 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441AEVB | 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441ATETRT | 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441 | Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441EVB | Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC2441 | 制造商:SEMTECH 制造商全稱: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 制造商全稱: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 制造商全稱: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 制造商全稱: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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