參數(shù)資料
型號： SP7648ER
英文描述： Low Reference High Efficiency Boost Regulator
中文描述： 高效率低參考升壓穩(wěn)壓器
文件頁數(shù)： 1/12頁
文件大小： 236K
代理商： SP7648ER
1
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator Copyright 2005 Sipex Corporation
SP7648
FEATURES
■
True Shutdown
■
700mA Output Current at 3.3V Input; 4.2V
output
■
92% Efficiency from 2.7V
IN
to 3.3V
OUT
■
Wide Input Voltage Range: 2.7V to 4.5V
■
5V Fixed or Adjustable Output
■
0.3
Switch
■
Integrated Synchronous Rectifier:0.3
■
Anti-Ringing Switch Technology
■
Programmable Inductor Peak Current
■
Logic Shutdown Control
■
Low 0.8V or 0.288V Reference Voltage
■
Small 10 pin DFN or MSOP Package
Low Reference High Efficiency Boost Regulator
APPLICATIONS
■
LED Driver
■
Camera Flash
■
Handheld Portable Devices
DESCRIPTION
The SP7648 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for
single cell Li-Ion or dual cell alkaline battery applications to drive various LEDs. The SP7648
combines low quiescent current and excellent light-load efficiency of PFM control. The SP7648
features synchronous rectification, a
0.3
charging switch, an anti-ringing inductor switch, under-
voltage
lockout and programmable inductor peak current. The device can be shut down by a
1nA active LOW shutdown pin. A very low 0.288V reference voltage is optimized for driving a
constant current load.
TYPICAL APPLICATION CIRCUIT
Now Available in Lead Free Packaging
SP7648
10 Pin DFN
10
9
8
7
6
1
2
3
4
5
VOUT
LX
PGND
GND
FB
FLASH
SHDN
NC (Test)
RLIM
VBATT
Preliminary
4.7
μ
H
V
SP7648
V
BATT
FLASH
FB
LX
V
OUT
NC
1.0K
ON/OFF
10
μ
F
SHDN
GND
10
μ
F
P
GND
0.33
R
LIM
(2.7 - 4.5V)
FLASH
470pF
R
LIM
1K
R
1
R
2
Q
1
D
1
相關(guān)PDF資料
PDF描述
SP7648EU Low Reference High Efficiency Boost Regulator
SP7648TR Low Reference High Efficiency Boost Regulator
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SP7648ER/TR 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:PackageLow Reference High efficiency Boost Regulator
SP7648ER-L 功能描述:LED照明驅(qū)動(dòng)器 Efficiency Boost Regulator RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
SP7648ER-L/TR 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
SP7648EU 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual
SP7648EU/TR 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Reference High Efficiency Boost Regulator
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