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SP6231EB Datasheet(PDF) 1 Page - Sipex Corporation

No. de pieza SP6231EB
Descripción Electrónicos  Evaluation Board Manual
Download  4 Pages
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Fabricante Electrónico  SIPEX [Sipex Corporation]
Página de inicio  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP6231EB Datasheet(HTML) 1 Page - Sipex Corporation

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Rev 09/24/02
SP6231 Evaluation Board Manual
Copyright Sipex Corporation
DESCRIPTION
The SP6231 Evaluation Board is designed to help the user evaluate the performance of
the SP6231 for use as a dual power source for applications like a DSC with USB port
power for downloading. The Evaluation Board operates from a 5V main supply which
can be from the on-board USB connector, providing a regulated 3.3V output at 500mA
or if that input is not present then from a 3.3V AUX switch input. The 3.3V AUX input is
available from an on-board option: Sipex’s SP6641B 2 Cell Battery Boost Converter to
3.3V auxiliary supply.
The SP6231 Evaluation Board can be used to provide glitch free transition between two
supplies. When the main power 5.0V input drops below 4.4V the auxiliary 3.3V is
switched to the output through the internal PFET. Thus, the SP6231 guarantees 3.3V
output “glitch free” operation.
Easy Evaluation for the SP6231 Linear
Regulator with Auxiliary Backup.
Evaluation Board provides complete,
ready to use solutions ideal for Digital
Still Camera (DSC) with USB port.
5.0 In, 3.3V Out, 500mA LDO.
Integrated Auxiliary Voltage Switch 0.2
Ω.
Glitch Free Transition between Two
Supplies: Battery or USB downloading.
Current Limit and Thermal Shutdown
Protection.
Fast Transient Response.
Applications: DSC, PCMCIA/PCI cards,
NIC Cards, Dual Power Systems.
SP6231EB
Evaluation Board Manual
SP6231REB SCHEMATIC
J2
AMP# 787616
1
2
3
4
80mohm
L1
10uH
6641 3.3V
USB CONNECTOR
1.8V to 3.3V
C6
1uF Cer.
L2 SM Bead
VAUX
SP6231 500MA LDO WITH AUX SWITCH
SHDN
D1
SCHOTTKY DIODE
J1
1
2
3
+5V
U1 SP6641B
1
2
4
5
3
LX
GND
SHDN
VBATT
VOUT
C3
2.2uF Cer.
GND
C5
0.1uF
VIN 5V
C4
10uF Cer.
C2
100uF
VOUT 3.3V
C1
100uF
SP6641B 2 CELL BOOST
VBATT
U2 SP6231
1
3
4
5
6
2
VAUX
GND
Vsense
Vin
Vout
GND
80mohm


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