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SP6651A Datasheet, PDF (1/16 Pages) Sipex Corporation – High Efficiency 800mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery | |||
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SP6651A
High Efficiency 800mA Synchronous Buck Regulator
Ideal for portable designs powered with Li Ion battery
FEATURES
â DFN Package (3mm x 3mm)
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 Over Temperature Protection
â Logic Shutdown Control
â Programmable UVLO and Adaptive
Battery Low Output
PVIN 1
VIN 2
BLON 3
D1 4
D0 5
10 LX
SP6651A
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 SP6651A 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 SP6651Aâs 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
SP6651A seamlessly transitions into 100% duty ratio operation further extending useful battery
life. The SP6651A 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.
TYPICAL APPLICATION SCHEMATIC
2.7V to 5.5V Input
VI
CIN
22µF
1M
BLON
10â¦
RVIN
CVIN
1µF
D1
D0
SP6651A
PVIN
LX
VIN
PGND
BLON
GND
D1
VOUT
D0
FB
L1
10µH
COUT
22µF
VOUT
800mA
VO
CF
RF
22pF
RI
200K
Date: 5/25/04
SP6651A High Efficiency 800mA Synchronous Buck Regulator
1
© Copyright 2004 Sipex Corporation
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