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SP6231EB Datasheet(PDF) 1 Page - Sipex Corporation |
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SP6231EB Datasheet(HTML) 1 Page - Sipex Corporation |
1 / 4 page 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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