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SP6655 Datasheet(PDF) 1 Page - Sipex Corporation

Part No. SP6655
Description  High Efficiency 400mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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SP6655 Datasheet(HTML) 1 Page - Sipex Corporation

 
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Date: 7/12/04
SP6655 High Efficiency 400mA Synchronous Buck Regulator
© Copyright 2004 Sipex Corporation
SP6655
High Efficiency 400mA Synchronous Buck Regulator
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’s proprietary control loop, 20µA light
load quiescent current, and 0.3Ω 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°C over temperature shutdown.
®
Ideal for portable designs powered with Li Ion battery
DESCRIPTION
FEATURES
■ 98% Efficiency Possible
■ Small 10-Pin DFN Package
■ Ultra-low 20µA Quiescent Current
■ 625mA Inductor Peak Current Limit
■ Guaranteed Minimum 400mA Output
Current
■ 2.7V to 5.5V Input Voltage Range
■ Output Adjustable Down to 1.0V
■ 100% Duty Ratio Low Dropout
Operation
■ 80µA Light Load Quiescent Current in
Dropout
APPLICATIONS
■ Cell Phones
■ PDA's
■ DSC's
■ MP3 Players
■ USB Devices
■ Point of Use Power
TYPICAL APPLICATION SCHEMATIC
SP6655
10 Pin DFN
10
9
8
7
6
1
2
3
4
5
PVIN
VIN
BLON
D1
D0
LX
P
GND
GND
V
OUT
FB
Now Available in Lead Free Packaging
BLON
VI
VO
D1
D0
10µF
L1
10µH
VOUT
400mA
2.7V to 5.5V Input
10Ω
1µF
SP6655
PVIN
BLON
D1
D0
LX
GND
VOUT
FB
PGND
VIN
10µF
CIN
CVIN
COUT
RVIN
RF
CF
22pF
RI
200K
1M


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