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參數資料
| 型號： | SC4501 |
| 廠商： | Semtech Corporation |
| 英文描述： | 2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| 中文描述： | 2Amp，2MHz的升壓型開關穩壓器的軟啟動 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 610K |
| 代理商： | SC4501 |
POWER MANAGEMENT
Description
The SC4501 is a high-frequency current-mode step-up
switching regulator with an integrated 2A power transis-
tor. Its high switching frequency (programmable up to
2MHz) allows the use of tiny surface-mount external pas-
sive components. Programmable soft-start eliminates high
inrush current during start-up. The internal switch is rated
at 32V making the converter suitable for high voltage ap-
plications such as Boost, SEPIC and Flyback.
1
www.semtech.com
SC4501
2Amp, 2MHz Step-Up Switching
Regulator with Soft-Start
Features
Applications
u
Flat screen LCD bias supplies
u
TFT bias supplies
u
XDSL power supplies
u
Medical equipment
u
Digital video cameras
u
Portables devices
u
White LED power supplies
The operating frequency of the SC4501 can be set with an
external resistor. The ability to set the operating frequency
gives the SC4501 design flexibilities. A dedicated COMP
pin allows optimization of the loop response. The SC4501
is available in thermally enhanced 8-Pin MSOP and 10-pin
MLPD packages.
Typical Application Circuit
u
Low saturation voltage switch: 220mV at 2A
u
Constant switching frequency current-mode control
u
Programmable switching frequency up to 2MHz
u
Soft-Start function
u
Input voltage range from 1.4V to 16V
u
Output voltage up to 32V
u
Low shutdown current
u
Adjustable undervoltage lockout threshold
u
Small low-profile thermally enhanced packages
Revision: October 25, 2005
C1
2.2
μ
F
5V
VIN
VOUT
SC4501
GND
2
1
3
8
5
6
4
SHDN
SS
IN
SW
COMP
7
FB
ROSC
ON
OFF
C3
10BQ015
R4
D1
L1
C2
10
μ
F
47nF
R2
20K
R1
174K
12V, 0.7A
C4
R3
C6
Figure 1(a). 5V to 12V Boost Converter.
All Capacitors are Ceramic.
MSOP-8 Pinout
f
/ MHz
R
3
/ K
R
4
/ K
C
4
/ pF
C
6
/ pF
L
1
/
μ
H
0.7
22.1
22.1
2200
-
10.5
(Falco D08019)
1.35
30.9
9.31
820
-
4.7
(Falco D08017)
2
63.4
4.75
470
22
3.3
(Coilcraft DO1813P)
Figure 1(b). Efficiencies of 5V to 12V Boost Converters at
700KHz, 1.4MHz and 2MHz.
Efficiency
50
55
60
65
70
75
80
85
90
95
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Load Current (A)
E
V
OUT
= 12V
4.7
μ
H, 1.4MHz
10.5
μ
H, 700KHz
3.3
μ
H, 2MHz
V
IN
= 5V
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| SC4501EVB | 2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4501MLTRT | 2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4501MSETRT | 2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4502 | 1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4501EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4501ML.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC4501MLTRT | 功能描述:IC REG BOOST ADJ 2A 10MLPD 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:50 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數:1 輸出電壓:5 V ~ 25 V 輸入電壓:2.3 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關:600kHz，1.2MHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 包裝:管件 供應商設備封裝:8-MSOP |
| SC4501MSETRT | 功能描述:IC REG BOOST ADJ 2A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 產品培訓模塊:MIC23xxx HyperLight Load™ Regulators 標準包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關:4MHz 電流 - 輸出:2A 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應商設備封裝:8-MLF?（2x2） 產品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
| SC4501STDEVB | 制造商:Semtech Corporation 功能描述:EVALUATION BOARD 制造商:SEMTECH 功能描述:Eval Board for SC4501 Step-Up Switching Regulator |
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