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參數資料
| 型號： | SP6639 |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Adjustable, High Efficiency, Low I Q , Step-Down DC-DC Converter(5V或可調電壓，高效，低I Q，步降DC-DC變換器) |
| 中文描述： | 可調，高效率，低智商，降壓型DC - DC轉換器（5V的或可調電壓，高效，低智商，步降型DC - DC變換器） |
| 文件頁數： | 1/13頁 |
| 文件大小： | 82K |
| 代理商： | SP6639 |
1
Rev. 2/23/01 SP6639/40/53 5/ 3.3/ 3V, Adj High Efficiency, Low I
Q
Step-Down DC-DC Converter Copyright 2001 Sipex Corporation
P
SP6639/40/53
5V/ 3.3V/ 3V Adjustable, High Efficiency, Low I
Q
,
Step-Down DC-DC Converter
The SP6639/40/53 step-down switching regulators provide high efficiency over a wide range
of input voltage, output voltage and output current. Duty cycle modulation is used to achieve
efficiencies over 90% for input voltages from 3.3V to 7.5V. It features a no load quiescent
current of only 10
μ
A. The circuit contains a 1
internal power MOSFET reducing the external
component count to only one inductor, a schottky diode and the usual input and output
capacitors. The internal oscillator is shut down when the circuit is in regulation to reduce power
consumption. Internal inductor damping significantly reduces EMI.
FEATURES
I
High Efficiency, 94%
I
10
μ
A Quiescent Current
I
Low Current Shutdown Mode
I
Low Battery Detector
I
Preset Or Adjustable Output Voltage
I
Low EMI Inductor Damping
DESCRIPTION
APPLICATIONS
I
Cellular Phones
I
Laptop Computers
I
Distributed Power Systems
I
5V to 3.3V Conversion
I
Lithium-Ion Systems
I
3 to 4 Alkaline Systems
V+
LBO
V
OUT
VFB
1
2
3
4
5
6
7
8
SP6639
SP6640
SP6653
LX
LBI
GND
SHDN
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| SP6640 | Adjustable, High Efficiency, Low I Q , Step-Down DC-DC Converter(3.3V或可調電壓，高效，低I Q，步降DC-DC變換器) |
| SP6653 | Adjustable, High Efficiency, Low I Q , Step-Down DC-DC Converter(3V或可調電壓，高效，低I Q，步降DC-DC變換器) |
| SP6641BEK-3.3 | Low Noise Evaluation Board |
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| SP6641AEK-5.0 | Low Noise Evaluation Board |
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| SP6641A | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Noise Evaluation Board |
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