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參數資料
| 型號： | SC4524ASETRT |
| 廠商： | Semtech Corporation |
| 英文描述： | 28V 2A Step-Down Switching Regulator |
| 中文描述： | 28V的第2A降壓型開關穩壓器 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 685K |
| 代理商： | SC4524ASETRT |
POWER MANAGEMENT
Features
November 2, 2007
1MHz 10V-28V to 5V/2A Step-Down Converter (Front Page Schematic)
28V 2A Step-Down Switching Regulator
SC4524A
Typical Application Circuit
Wide input range: 3V to 28V
2A Output Current
200kHz to 2MHz Programmable Frequency
Precision V Feedback Voltage
Peak Current-Mode Control
Cycle-by-Cycle Current Limiting
Hiccup Overload Protection with Frequency Foldback
Soft-Start and Enable
Thermal Shutdown
Thermally Enhanced 8-pin SOIC Package
Fully RoHS and WEEE compliant
Applications
XDSL and Cable Modems
Set Top Boxes
Point of Load Applications
CPE Equipment
DSP Power Supplies
LCD and Plasma TVs
Description
The SC4524A is a constant frequency peak current-mode
step-down switching regulator capable of producing 2A
output current from an input ranging from 3V to 28V. The
switching frequency of the SC4524A is programmable
up to 2MHz, allowing the use of small inductors and
ceramic capacitors for miniaturization, and high input/
output conversion ratio. The SC4524A is suitable for
next generation XDSL modems, high-definition TVs and
various point of load applications.
Peak current-mode PWM control employed in the
SC4524A achieves fast transient response with simple loop
compensation. Cycle-by-cycle current limiting and hiccup
overload protection reduces power dissipation during
output overload. Soft-start function reduces input start-
up current and prevents the output from overshooting
during power-up.
The SC4524A is available in SOIC-8 EDP package.
Figure 1. 1MHz 10V-28V to 5V/2A Step-down Converter
Efficiency
40
45
50
55
60
65
70
75
80
85
90
0
0.5
1
1.5
2
Load Current (A)
E
V
IN
= 24V
SS270 REV 4
V
IN
= 12V
SC4524A
GND
IN
SW
BST
L1
8.2
m
H
C1
0.1
m
F
SS/EN
COMP
FB
D2
20BQ030
10.5k
R6
42.2k
10nF
C8
10pF
C5
2.2nF
L1: Coiltronics DR73-8R2
OUT
5V/2A
D1
1N4148
10V – 28V
ROSC
C2: Murata GRM31CR60J226K
C4: Murata GRM31CR71H225K
C4
2.2
m
F
VIN
C2
22
m
F
C7
R4
18.2k
R5
28.0k
R7
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| SC4524B | 16V 2A Step-Down Switching Regulator |
| SC4524BEVB | 16V 2A Step-Down Switching Regulator |
| SC4524BSETRT | 16V 2A Step-Down Switching Regulator |
| SC4524 | Programmable Frequency, 2A Output 30V Step-Down Switching Regulator |
| SC4524EVB | Programmable Frequency, 2A Output 30V Step-Down Switching Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4524B | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:氣門2A型降壓型開關穩壓器 |
| SC4524B_08 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:18V 2A Step-Down Switching Regulator |
| SC4524BEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:18V 2A Step-Down Switching Regulator |
| SC4524BSETRT | 功能描述:IC REG BUCK 2A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| SC4524C | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:28V 2A Step-Down Switching Regulator Wide input range: 3V to 28V |
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