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參數資料
| 型號： | 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雙開關穩(wěn)壓器集成甲開關 |
| 文件頁數： | 25/26頁 |
| 文件大?。?/td> | 643K |
| 代理商： | SC2440TETRT |
25
2005 Semtech Corp.
www.semtech.com
SC2440
POWER MANAGEMENT
Typical Application Circuits
C16
1
μ
F
R3
40.2K
SC2440
GND
SS2
IN
SW1
FB2
ROSC
COMP2
C9
10pF
R7
11.8K
BOOST1
C1
10
μ
F
X 2
BOOST2
SW2
L1
15
μ
H
C2
0.1
μ
F
L2
6.8
μ
H
C4
0.1
μ
F
PGOOD2
SS1
PGOOD1
COMP1
FB1
C3
D1
D2
UPS140
R8
100K
R6
R9
51.1K
OUT1
5V/2A
R4
R2
R1
205K
C7
33nF
C10
33nF
C8
4.7nF
R5
22.1K
C5
2.2nF
D4
SYNC
L1 : Coiltronic DR74
L2 : Coiltronic DR73
OUT2
1.8V/2A
D3
1N4148
VIN
10
μ
F
X 2
68pF
C12
10pF
C11
33pF
C6
10pF
C15
47
μ
F
C15 : 25V Electrolytic
All Other Capacitor are Ceramic.
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.
1
μ
s/div
CH1 : SW1 Voltage, 10V/div
CH2 : SW2 Voltage, 10V/div
Figure 19(b). Switching Waveforms.
V
IN
= 20V
I
OUT1
= 1A
I
OUT2
=
1A
CH1
CH2
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.
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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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