Regulator ICs Surface-mount power supply unit for LCD drivers BP5317 The BP5317 is a DC / DC converter unit designed for driving liquid crystal displays (LCDs). The unit supplies a positive voltage for LCDs from a logic circuit power supply (5V). Being in a compact and light surface-mount package, the IC can be built into an LCD panel. Applications LCD panels of personal computers, word processors, and copiers Features 1) Automatic mounting and reflow soldering supported. 2) Compact size and thin design enable internal installation in LCD panels. 3) Internal short-circuit protection. Absolute maximum ratings (Ta = 25C) 25 Regulator ICs Block diagram Pin descriptions 26 BP5317 Regulator ICs BP5317 Electrical characteristics (unless otherwise noted, Ta = 25C and VCTL = 5V) Measurement circuit Electrical characteristic curve 27 Regulator ICs Recommended pad dimensions Operation notes The soldering used inside the unit is equivalent to H63 solder, so it will remelt during reflow. External dimensions (Units: mm) 28 BP5317