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| Communication ICs PCMCIA / flash memory power supply BP5315 The BP5315 is a DC / DC converter for supplying power to PCMCIA flash memory. From a power supply ()5V) for PCMCIA operations, the IC supplies a voltage for programming operations ()12V). Compact and thin surface-mounted package with embossing tape for automatic mounting. FApplications Personal computers, CD-ROM players, portable information devices, and other PCMCIA-slot equipped devices FFeatures 1) Designed to provide power for PCMCIA flash memory programming operations. (output voltage = 12V 5%; output current = 120mA) 2) The 5V operating voltage is same as the IC memory card operating voltage. 3) Built-in short-circuit protection circuit. FAbsolute maximum ratings 4) Compact and thin SMD package. 5) Supplied with embossing tape for automatic mounting by the mounter. 607 Communication ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCTL = 5V) BP5315 608 Communication ICs FMeasurement circuit BP5315 FPin descriptions 609 Communication ICs FApplication examples (1) Flash memory that requires 5V for reading BP5315 Fig.2 FOperation notes (1) Place I / O external capacitors as near as possible to the connection pins. In particular, make sure to minimize the impedance between the input-side capacitor (C1) and pin 5. A length less than 50mm is recommended for a copper foil of 1.0mm wide and 35m thick. (2) Avoid frequent switching using the ON / OFF CTL pin (five times per second at the maximum). 610 Communication ICs (2) Pull-down of VP-P BP5315 Fig.3 The OFF output is pulled down through an effective resistance of 30k. FOperation notes (3) The module has a built-in short-circuit protection circuit. Short-circuiting is assumed if the output voltage does not reach 4.2V (typical) in 40ms (typical), and the protection circuit starts to operate. When setting the outFExternal dimensions (Units : mm) put capacitor, we recommend considering the capacitance within the IC card and making the output voltage to reach 8V or more in less than 20ms. S The soldering used inside the unit is equivalent to H63 solder, so it will remelt during reflow. Be sure not to subject the unit to any vibrations when passing through the reflow furnace. 611 |
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