参数资料
| 型号： | SC4502HMLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1.4A 10MLPD |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 40V |
| 输入电压： | 1.4 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 1.4A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-MLPD（3x3） |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC4502HMLDKR |
SC4502/SC4502H
1.4Amp, 2MHz Step-Up Switching
Regulator with Soft-Start
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.
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
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
VIN
L1
D1
VOUT
5V
C1
2.2 μ F
OFF ON
C3
47nF
3
10
8 6,7
IN SW
SHDN FB
SC4502
SS COMP
GND ROSC
4,5 9
R4
2
1
10BQ015
R3
C4
C6
R1
866K
R2
100K
12V
C2
10 μ F
95
90
85
80
75
Efficiency
10.5 μ H, 700KHz 5.3μ H, 1.4MHz
3.3μ H, 2MHz
70
65
All Capacitors are Ceramic.
60
55
50
V IN = 5V
V OUT = 12V
f ( M H z )
R 3 ( K ? ) R 4 ( K ? )
C 4 ( p F )
C 6 ( p F )
L 1 ( μ H )
0.0
0.1
0.2
0.3
0.4
0.5
0 . 7
1 . 4
2
3 3 . 2
5 9 . 0
7 3 . 2
2 3 . 7
9 . 5 3
5 . 3 6
1 5 0 0
5 6 0
3 3 0
-
-
2 2
1 0 . 5 ( F a l c o D 0 8 0 1 9 )
5 . 3 ( S u m i d a C D R H 5 D 2 8 )
3 . 3 ( C o i l c r a f t D O 1 8 1 3 P )
Load Current (A)
Figure 1(b). Efficiencies of 5V to 12V Boost Converters at
700KHz, 1.4MHz and 2MHz.
Figure 1(a). 5V to 12V Boost Converter.
Revision: July 25, 2005
1
www.semtech.com
相关PDF资料 |
PDF描述 |
|---|---|
| SC4503TSKTRT | IC REG BOOST ADJ 1.4A TSOT23-5 |
| SC4508AMLTRT | IC REG CTRLR BST INV PWM 12-MLPQ |
| SC4517AIMSTRT | IC REG BUCK ADJ 1.5A 8MSOP |
| SC4518HSETRT | IC REG BUCK 2A 8-SOIC |
| SC4519HSETRT | IC REG BUCK 3A 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 制造商全称:Semtech Corporation 功能描述:1.3MHz Step-Up Switching Regulator with 1.4A Switch |
| SC4503EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.3MHz Step-Up Switching Regulator with 1.4A Switch |
| SC4503TSK.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC4503TSKTRT | 功能描述:IC REG BOOST ADJ 1.4A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
发布紧急采购，3分钟左右您将得到回复。