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SP6655EU-L

Description
Switching converters, voltage regulators and controllers high eff 400ma synchronous
Categorysemiconductor    Power management   
File Size275KB,16 Pages
ManufacturerExar [Exar Corporation]
Environmental Compliance
Download Datasheet Parametric View All

SP6655EU-L Overview

Switching converters, voltage regulators and controllers high eff 400ma synchronous

SP6655EU-L Parametric

Parameter NameAttribute value
MakerExar [Exar Corporation]
Product CategorySwitching Converters, Regulators and Controllers
RoHSyes
®
SP6655
Ideal for portable designs powered with Li Ion battery
High Efficiency 400mA Synchronous Buck Regulator
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
P
VIN
VIN
BLON
D1
D0
1
2
3
4
5
10
SP6655
10 Pin DFN
LX
9
P
GND
8
GND
7
V
OUT
6
FB
Now Available in Lead Free Packaging
APPLICATIONS
■Cell
Phones
■PDA's
■DSC's
■MP3
Players
USB Devices
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’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.
TYPICAL APPLICATION SCHEMATIC
2.7V to 5.5V Input
VI
L1
10µH
10Ω
R
VIN
CV
IN
1µF
V
OUT
400mA
VO
C
IN
10µF
1M
SP6655
P
VIN
V
IN
BLON
LX
P
GND
GND
C
OUT
10µF
CF
R
F
22pF
BLON
D1
D0
D1
D0
V
OUT
FB
R
I
200K
Date: 12/23/05
SP6655 High Efficiency 400mA Synchronous Buck Regulator
© Copyright 2005 Sipex Corporation
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