Regulator ICs Power supply unit for LCD drives BP5311 The BP5311 is a DC-DC converter unit for supplying power to liquid crystal display (LCD) panels. The unit supplies a positive voltage for LCDs from a logic circuit power supply (5V) Applications LCD panels in personal computers and word processors Features 1) High conversion efficiency. 2) Built-in protection circuit. 3) Built-in ON / OFF switch. 4) Compact and light. 5) Surface mounting is possible because parts are concentrated on one side. Absolute maximum ratings (Ta = 25C) Block diagram 369 Regulator ICs Pin descriptions Electrical characteristics (unless otherwise noted, Ta = 25C, VCTL = 5V, and R1 and R2 resistors are disconnected) 370 BP5311 Regulator ICs BP5311 Measurement circuit and application example Electrical characteristic curves 371 Regulator ICs External dimensions (Units: mm) 372 BP5311