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SP6656ER/TR Datasheet

  • SP6656ER/TR

  • High Efficiency 400mA Synchronous Buck Regulator with Bit Pr...

  • 184.78KB

  • 17頁

  • SIPEX

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廬
SP6656
High Efficiency 400mA Synchronous Buck Regulator with
Bit Programmable Output
FEATURES
鈻?/div>
98% Efficiency Possible
鈻?/div>
Small 3X3 10-Pin DFN Package
鈻?/div>
Ultra-low 20碌A Quiescent Current
鈻?/div>
625mA Inductor Peak Current Limit
鈻?/div>
Guaranteed Minimum 400mA Output
Current
鈻?/div>
2.7V to 5.5V Input Voltage Range
鈻?/div>
Output Adjustable Down to 1.0V
鈻?/div>
100% Duty Ratio Low Dropout
Operation
鈻?/div>
80碌A Light Load Quiescent Current in
Dropout
鈻?/div>
Output Voltage Logic Selection
鈻?/div>
Ideal for portable designs powered with
Li Ion battery
P
VIN
VIN
OVSO
OVSI
EN
1
2
3
4
5
10
LX
GND
SP6656
10 Pin DFN
9
P
8
GND
7
V
OUT
6
FB
Now Available in Lead Free Packaging
APPLICATIONS
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Cell Phones
鈻?/div>
PDA's
鈻?/div>
DSC's
鈻?/div>
MP3 Players
鈻?/div>
USB Devices
鈻?/div>
Point of Use Power
DESCRIPTION
The SP6656 is a 400mA synchronous buck regulator that is ideal for portable applications that
use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6656鈥檚 proprietary control loop, 20碌A light
load quiescent current, and 0.3鈩?power switches provide excellent efficiency across a wide range
of output currents. As the input battery supply decreases towards the output voltage the SP6656
seamlessly transitions into 100% duty ratio operation further extending useful battery life. The
SP6656 is protected against overload and short circuit conditions with a precise inductor peak
current limit. Other features include externally programmable output voltage down to 1.0V, logic
controlled output voltage selection, logic level shutdown control, and 140擄C over temperature
shutdown.
TYPICAL APPLICATION SCHEMATIC
2.7V to 5.5V Input
VI
L1
10碌H
10鈩?/div>
R
VIN
CV
IN
1碌F
V
OUT
400mA
VO
C
IN
10碌F
SP6656
P
VIN
V
IN
OVSO
OVSI
EN
LX
P
GND
GND
C
OUT
10碌F
CF
R
F
22pF
V
OUT
FB
R
S
R
I
Date: 7/9/04
SP6656 High Efficiency 400mA Synchronous Buck Regulator with Bit Programmable Output
漏 Copyright 2004 Sipex Corporation
1

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