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CM3103-01SF Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CM3103-01SF Datasheet(HTML) 1 Page - California Micro Devices Corp |
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1 / 10 page  © 2004 California Micro Devices Corp. All rights reserved. 01/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 1 CM3103 400mA SmartORTM Regulator with VAUX Switch Features • Continuous 3.3V / 400mA output from two inputs • Complete Power Management solution • Built-in hysteresis when selecting input supplies • Integrated switch featuring low RDSON (0.25Ω typ. ) • Foldback current limiting protection • Thermal overload shutdown protection • 8-pin SOIC package • Lead-free version available Applications • PCI adapter cards with Wake-On-LAN • Network Interface Cards (NICs) • Multiple power supply systems • Systems with standby capabilities Product Description The CM3103 combines a fixed voltage regulator and a VAUX switch in a single 8-pin SOIC package. The volt- age regulator is capable of delivering up to 400mA con- tinuously at 3.3V. The output power is provided from two independent input voltage sources on a prioritized basis. Power is always taken in priority of VCC, then VAUX. When VCC (5V) is present, the device automatically enables the regulator, producing a stable 3.3V output at VOUT, while disabling the VAUX switch. When only VAUX (3.3V) is present, the device provides a low impedance direct connection (0.25 Ω typ.) from VAUX to VOUT. All the necessary control circuitry needed to provide a smooth and automatic transition between both supplies has been incorporated. This allows the VCC input sup- ply to be dynamically switched without loss of output voltage. The CM3103 is available with optional lead-free finish- ing. Simplified Electrical Schematic Typical Application Circuit + VCC GND VOUT - + Enable - Controller AuxSw 3.3V 4.2V Vdeselect AuxSw 0.25 Ω Regulator Amp VAUX VAUX VOUT GND VOUT CM3103 VCC 10 µF 5V VCC VAUX 3.3V CEXT + GND 1 µF CIN + 3.3V/400mA |
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Similar Description - CM3103-01SF |
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