|
SP6654 Datasheet, PDF (1/17 Pages) Sipex Corporation – High Efficiency 800mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery | |||
|
®
SP6654
High Efficiency 800mA Synchronous Buck Regulator
Ideal for portable designs powered with Li Ion battery
FEATURES
â Ultra-low 20µA Quiescent Current
â 98% Efficiency Possible
â 800mA Output Current
â 2.7V to 5.5V Input Voltage Range
â Output Adjustable Down to 1.0V
â No External FETâs Required
â 1.25A Inductor Peak Current Limit
â 100% Duty Ratio Low Dropout Operation
â 80µA Light Load Quiescent Current
in Dropout
â Logic Shutdown Control
â Programmable UVLO
â Small 10 pin MSOP Package
â Power Good Indicator
â Industry Standard 10 Pin MSOP and
and Small DFN Package
PVIN 1
VIN 2
PWRGD 3
D1 4
D0 5
10 LX
SP6654
10 Pin DFN
9 PGND
8 GND
7 VOUT
6 FB
Now Available in Lead Free Packaging
APPLICATIONS
â PDA's
â DSC's
â MP3 Players
â USB Devices
â Point of Use Power
DESCRIPTION
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 SP6654âs proprietary control loop, 20µA light
load quiescent current, and 0.3⦠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.
TYPICAL APPLICATION SCHEMATIC
2.7V to 5.5V Input
VI
CIN
22µF
1M
PWRGD
10â¦
RVIN
CVIN
1µF
D1
D0
SP6654
PVIN
LX
VIN
PGND
PWRGD
GND
D1
VOUT
D0
FB
L1
10µH
COUT
22µF
VOUT
800mA
VO
CF
RF
22pF
RI
200K
Date: 2/1/05
SP6654 High Efficiency 800mA Synchronous Buck Regulator
1
© Copyright 2005 Sipex Corporation
|
▷ |