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SP7648_06 Datasheet

  • SP7648_06

  • PackageLow Reference High efficiency Boost Regulator

  • 13頁(yè)

  • SIPEX

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SP7648
TM
Low Reference High efficiency Boost Regulator
FeaTUReS
鈻?/div>
True Shutdown
鈻?/div>
700mA Output Current at 3.3V Input; 4.2V
output
鈻?/div>
92% Efficiency from 2.7V
IN
to 3.3V
OUT
鈻?/div>
Wide Input Voltage Range: 2.7V to 4.5V
鈻?/div>
5V Fixed or Adjustable Output
鈻?/div>
0.3
Switch
鈻?/div>
Integrated Synchronous Rectifier:0.3
鈻?/div>
Anti-Ringing Switch Technology
鈻?/div>
Programmable Inductor Peak Current
鈻?/div>
Logic Shutdown Control
鈻?/div>
Low 0.8V or 0.288V Reference Voltage
鈻?/div>
Small 10 pin DFN or MSOP Package
V
BATT

2
3
4
5
0
V
OUT
FLASH
NC (Test)
R
LIM
SP7648
10 Pin DFN
9
LX
8
P
GND
7
GND
6
FB
SHDN
Now Available in Lead Free Packaging
aPPLicaTiOnS
鈻?/div>
LED Driver
鈻?/div>
Camera Flash
鈻?/div>
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
4.7碌H
V
in
(2.7 - 4.5V)
0碌F
V
BATT
On/OFF
SHDN
R
LIM
R
LIM
1.0K
廬
SP7648
LX
0碌F
0.33
D

V
OUT
NC
470pF
FLASH
GND
P
GND
FB
1K
R
2
Q

R

FLaSH
Mar16-06 Rev B
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
漏 2006 Sipex Corporation


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