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SP6655ER/TR Datasheet

  • SP6655ER/TR

  • High Efficiency 400mA Synchronous Buck Regulator Ideal for p...

  • 180.52KB

  • 16頁

  • SIPEX

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廬
SP6655
Ideal for portable designs powered with Li Ion battery
High Efficiency 400mA Synchronous Buck Regulator
FEATURES
鈻?/div>
98% Efficiency Possible
鈻?/div>
Small 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
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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
P
VIN
VIN
BLON
D1
D0
1
2
3
4
5
10
LX
GND
SP6655
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
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PDA's
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DSC's
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MP3 Players
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USB Devices
鈻?/div>
Point of Use Power
DESCRIPTION
The SP6655 is a 400mA synchronous buck regulator which is ideal for portable applications that
use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6655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 SP6655
seamlessly transitions into 100% duty ratio operation further extending useful battery life. The
SP6655 is protected against overload and short circuit conditions with a precise inductor peak
current limit. Other features include programmable under voltage lockout and low battery
detection, externally programmed output voltage down to 1.0V, 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
1M
SP6655
P
VIN
V
IN
BLON
LX
P
GND
GND
C
OUT
10碌F
CF
R
F
22pF
BLON
D1
D0
D1
D0
V
OUT
FB
R
I
200K
Date: 7/12/04
SP6655 High Efficiency 400mA Synchronous Buck Regulator
漏 Copyright 2004 Sipex Corporation
1

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