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參數(shù)資料
| 型號： | SC4502H |
| 廠商： | Semtech Corporation |
| 英文描述： | 1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| 中文描述： | 1.4Amp，2MHz的升壓型開關穩(wěn)壓器的軟啟動 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 418K |
| 代理商： | SC4502H |
POWER MANAGEMENT
Description
The SC4502/SC4502H is a high-frequency current-mode
step-up switching regulator with an integrated 1.4A
power transistor. Its high switching frequency (program-
mable up to 2MHz) allows the use of tiny surface-mount
external passive components. Programmable soft-start
eliminates high inrush current during start-up. The inter-
nal switch is rated at 32V (40V for the SC4502H) mak-
ing the converter suitable for high voltage applications
such as Boost, SEPIC and Flyback.
1
www.semtech.com
SC4502/SC4502H
1.4Amp, 2MHz Step-Up Switching
Regulator with Soft-Start
Features
Low saturation voltage switch: 210mV
(250mV for the SC4502H)
Constant switching frequency current-mode control
Programmable switching frequency up to 2MHz
Soft-Start function
Input voltage ranges from 1.4V to 16V
Output voltage up to 32V (40V for the SC4502H)
Low shutdown current
Adjustable undervoltage lockout threshold
Small low-profile thermally enhanced lead free
package. This product is fully WEEE and RoHS
compliant.
Applications
Flat screen LCD bias supplies
TFT bias supplies
XDSL power supplies
Medical equipment
Digital video cameras
Portables devices
White LED power supplies
The operating frequency of the SC4502/SC4502H can
be set with an external resistor. The ability to set the
operating frequency gives the SC4502/SC4502H design
flexibilities. A dedicated COMP pin allows optimization of
the loop response. The SC4502/SC4502H is available
in thermally enhanced 10-pin MLPD package.
Typical Application Circuit
Revision: July 25, 2005
Figure 1(a). 5V to 12V Boost Converter.
All Capacitors are Ceramic.
C1
2.2
μ
F
5V
VIN
VOUT
SC4502
GND
2
1
3
6,7
8
4,5
SHDN
SS
IN
SW
COMP
9
FB
ROSC
10
ON
OFF
C3
10BQ015
R4
D1
L1
C2
10
μ
F
47nF
R2
100K
R1
866K
12V
C4
R3
C6
f
)
H
M
(
R
3
K
(
)
R
4
K
(
)
C
4
)
p
C
6
)
p
L
1
(
μ
)
H
7
2
3
7
2
0
0
5
1
-
)
1
0
8
0
D
o
c
F
5
1
4
0
5
3
5
0
6
5
-
)
2
D
5
H
R
D
C
a
d
m
u
S
3
2
2
7
6
3
0
3
3
2
2
)
3
1
8
1
O
D
t
C
3
Efficiency
50
55
60
65
70
75
80
85
90
95
0.0
0.1
0.2
0.3
0.4
0.5
Load Current (A)
E
V
OUT
= 12V
V
IN
= 5V
10.5
μ
H, 700KHz
3.3μ
H, 2MHz
5.3μ
H, 1.4MHz
Figure 1(b). Efficiencies of 5V to 12V Boost Converters at
700KHz, 1.4MHz and 2MHz.
相關PDF資料 |
PDF描述 |
|---|---|
| SC4502HEVB | 1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4502HMLTRT | 1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4502MLTRT | 1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4503 | 1.3MHz Step-Up Switching Regulator with 1.4A Switch |
| SC4503EVB | 1.3MHz Step-Up Switching Regulator with 1.4A Switch |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC4502HEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4502HMLTRT | 功能描述:IC REG BOOST ADJ 1.4A 10MLPD RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(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: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) 供應商設備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| SC4502MLTRT | 制造商:Semtech Corporation 功能描述:Conv DC-DC Single Step Up 1.4V to 16V 10-Pin MLPD EP T/R 制造商:Semtech Corporation 功能描述:SC4502 Series 1.4 A 2 MHz 32 V Boost Switching Regulator - MLPD-10 |
| SC4503 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1.3MHz Step-Up Switching Regulator with 1.4A Switch |
| SC4503EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1.3MHz Step-Up Switching Regulator with 1.4A Switch |
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