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SP6654 Datasheet(PDF) 1 Page - Sipex Corporation

Part No. SP6654
Description  High Efficiency 800mA Synchronous Buck Regulator
Download  17 Pages
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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SP6654 Datasheet(HTML) 1 Page - Sipex Corporation

 
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Date: 2/1/05
SP6654 High Efficiency 800mA Synchronous Buck Regulator
© Copyright 2005 Sipex Corporation
SP6654
FEATURES
■ Ultra-low 20µA Quiescent Current
■ 98% Efficiency Possible
■ 800mA Output Current
■ 2.7V to 5.5V Input Voltage Range
■ Output Adjustable Down to 1.0V
■ No External FET’s Required
■ 1.25A Inductor Peak Current Limit
■ 100% Duty Ratio Low Dropout Operation
■ 80µA Light Load Quiescent Current
in Dropout
■ Logic Shutdown Control
■ Programmable UVLO
■ Small 10 pin MSOP Package
■ Power Good Indicator
■ Industry Standard 10 Pin MSOP and
and Small DFN Package
High Efficiency 800mA Synchronous Buck Regulator
APPLICATIONS
■ PDA's
■ DSC's
■ MP3 Players
■ USB Devices
■ Point of Use Power
The SP6654 is a 800mA synchronous buck regulator which is ideal for portable applications that
use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6654’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 SP6654
seamlessly transitions into 100% duty ratio operation further extending useful battery life. The
SP6654 is protected against overload and short circuit conditions with a precise inductor peak
current limit. Other features include programmable under voltage lockout, externally pro-
grammed output voltage down to 1.0V, logic level shutdown control, and an open drain power
good indicator when VOUT is above 94% of its programmed value.
®
PWR
GD
VI
VO
D1
D0
22µF
L1
10µH
VOUT
800mA
2.7V to 5.5V Input
10Ω
1µF
SP6654
PVIN
PWR
GD
D1
D0
LX
GND
VOUT
FB
PGND
VIN
22µF
CIN
CVIN
COUT
RVIN
RF
CF
22pF
RI
200K
1M
Ideal for portable designs powered with Li Ion battery
TYPICAL APPLICATION SCHEMATIC
DESCRIPTION
SP6654
10 Pin DFN
10
9
8
7
6
1
2
3
4
5
PVIN
VIN
PWRGD
D1
D0
LX
PGND
GND
VOUT
FB
Now Available in Lead Free Packaging


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