Regulator ICs Power supply PCMCIA / flash memory BP5320 The BP5320 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. Applications Personal computers, CD-ROM players, portable information devices, and other PCMCIA-slot equipped devices Features 1) Designed to provide power to PCMCIA programming operations. 2) The 5V operating voltage is same as the IC memory card operating voltage. 3) The large current enables power to be supplied to sound ICs. 4) Compact and thin SMD package. 5) Supplied with embossing tape for automatic mounting by the mounter. 6) Built-in short-circuit protection circuit. Absolute maximum ratings (Ta=25C) Block diagram 29 Regulator ICs Electrical characteristics (unless otherwise noted, Ta=25C and VCTL=5V) Measurement circuit Pin descriptions 30 BP5320 Regulator ICs BP5320 Application example (1) Flash memory that requires 5V for reading (2) Pull-down of VP–P The OFF output is pulled down through an effective resistance of 30kΩ. Operation 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 35µm thick. (2) Avoid frequent switching using the ON / OFF CTL pin (five times per second at the maximum). 31 Regulator ICs BP5320 FElectrical characteristics curve FExternal dimensions (Units: mm) 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. 32