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參數資料
| 型號： | SC4503EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | 1.3MHz Step-Up Switching Regulator with 1.4A Switch |
| 中文描述： | 1.3MHz升壓型開關穩壓器與1.4A的開關 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 1125K |
| 代理商： | SC4503EVB |
POWER MANAGEMENT
Description
SC4503
1.3MHz Step-Up Switching
Regulator with 1.4A Switch
The SC4503 is a 1.3MHz current-mode step-up switch-
ing regulator with an integrated 1.4A power transistor.
Its high switching frequency allows the use of tiny sur-
face-mount external passive components. The SC4503
features a combined shutdown and soft-start pin. The
optional soft-start function eliminates high input current
and output overshoot during start-up. The internal com-
pensation network accommodates a wide range of volt-
age conversion ratios. The internal switch is rated at 34V
making the device suitable for high voltage applications
such as Boost and SEPIC.
The SC4503 is available in low-pro
fi
le 5-lead TSOT-23 and
8-lead 2X2mm MLPD-W packages. The SC4503’s low
shutdown current (< 1
μ
A), high frequency operation and
small size make it suitable for portable applications.
Low Saturation Voltage Switch: 260mV at 1.4A
1.3MHz Constant Switching Frequency
Peak Current-mode Control
Internal Compensation
Programmable Soft-Start
Input Voltage Range From 2.5V to 20V
Output Voltage up to 27V
Uses Small Inductors and Ceramic Capacitors
Low Shutdown Current (< 1
μ
A)
Low Pro
fi
le 5-Lead TSOT-23 and 8-Lead 2X2mm
MLPD-W packages
Fully WEEE and RohS compliant
Local DC-DC Converters
TFT Bias Supplies
XDSL Power Supplies
Medical Equipment
Digital Cameras
Portable Devices
White LED Drivers
1
μ
F
C1
5V
VIN
VOUT
SC4503
3
1
5
2
GND
SHDN/SS
IN
SW
FB
4
ON
OFF
10BQ015
D1
L1
C2
4.7
μ
F
R2
49.9k
R1
432k
12V, 0.5A
4.7
μ
H
C4
15pF
Efficiency vs Load Current
50
55
60
65
70
75
80
85
90
95
0.001
0.010
0.100
1.000
Load Current (A)
E
V
OUT
= 12V
1.3MHz
www.semtech.com
1
May 4, 2007
Features
Typical Application Circuit
Applications
C1: Murata GRM188R61A105K
C2: Murata GRM21BR61C475K
L1: Sumida CDC5D23B-4R7
Figure 1(a). 5V to 12V Boost Converter
Figure 1(b). Ef
fi
ciency of the 5V to 12V Boost Converter
相關PDF資料 |
PDF描述 |
|---|---|
| SC4503TSKTRT | 1.3MHz Step-Up Switching Regulator with 1.4A Switch |
| SC4505 | High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4505EVB | High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4505MLTRT | High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4508A | Buck or Buck-Boost (Inverting) Current Mode Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數: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） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| SC4503WLTRT | 功能描述:IC REG BOOST ADJ 1.4A 8MLPD 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:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數: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） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| SC4505 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Efficiency Boost Converter for Backlight/Flash LED Driver |
| SC4505_07 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Efficiency Boost Converter for Backlight/Flash LED Driver |
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