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參數(shù)資料
| 型號： | SC2440EVB |
| 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)： | 1/26頁 |
| 文件大?。?/td> | 643K |
| 代理商： | SC2440EVB |
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www.semtech.com
SC2440
2.5 MHz Dual Switching Regulator
with Integrated 2A Switches
POWER MANAGEMENT
Description
The SC2440 is an adjustable frequency dual current-
mode switching regulator with 2A integrated switches.
Its high frequency operation allows the use of small
inductors and capacitors, resulting in very compact power
supplies. The SC2440 is suitable for next generation XDSL
modems requiring operating frequencies in excess of 1.5
MHz. The two channels operate at 180° out of phase
for reduced input voltage ripples. Separate soft start/
shutdown pins allow independent control and output
sequencing for latch-up prevention. The SC2440 can also
be externally synchronized up to 2.5 MHz per channel.
Revision: March 5, 2007
Features
u
Up to 2.5 MHz/Channel Programmable Switching
Frequency
u
Fixed Frequency Current-mode Control
u
Wide Input Voltage Range 2.8V to 20V
u
Out of Phase Switching Reduces Ripple
u
Cycle-by-cycle Current-limiting
u
Independent Shutdown/soft-start Pins
u
Independent Hiccup Overload Protection
u
Independent Power-Good Indicators
u
Two 2A Integrated Switches
u
External Synchronization
u
Thermal Shutdown
u
Thermally Enhanced 16-pin TSSOP Package
Applications
u
XDSL and Cable Modems
u
Set-up Boxes
u
Point of Load Applications
u
CPE Equipment
u
DSP Power Supplies
u
Disk Drives
Typical Application Circuit
Current-mode PWM control allows fast transient
response with simple loop compensation. Cycle-by-cycle
current limiting and hiccup overload protection reduce
power dissipation during overload.
C15
10
μ
F
R3
40.2K
SC2440
GND
SS2
IN
SW1
FB2
ROSC
COMP2
C9
10pF
R7
24.3K
BOOST1
C1
10
μ
F
BOOST2
SW2
L1
3.3
μ
H
D1
C2
0.1
μ
F
L2
4.4
μ
H
C4
R8
100K
0.1
μ
F
PGOOD2
SS1
PGOOD1
COMP1
FB1
C3
10
μ
F
UPS120
D2
UPS120
R6
R9
15K
OUT1
3.3V/2A
10K
R4
R2
R1
23.3K
C7
22nF
C10
22nF
C8
220pF
C6
10pF
R5
15.4K
C5
470pF
D4
1N4148
SYNC
L1: Sumida CR43
L2: Falco D04012
OUT2
5V/2A
D3
1N4148
VIN
12V
Efficiency vs Load Current
Figure 1. 1.3MHz 12V to 3.3V and 5V Step-down Converter
50
55
60
65
70
75
80
85
90
95
0
0.5
1
1.5
2
Load Current (A)
E
V
OUT2
= 5V
V
OUT1
= 3.3V
V
IN
= 12V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC2440TETRT | 2.5 MHz Dual Switching Regulator with Integrated 2A Switches |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC2440STDEVB | 制造商:Semtech Corporation 功能描述:Evaluation Board For 2.5 MHz Dual Switching Regulator With Integrated 2A Switches |
| SC2440TE.TRTCUT | 制造商:Semtech Corporation 功能描述: |
| SC2440TETRT | 功能描述:IC REG BUCK 2A DL 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| 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 |
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