LM2767 Datasheet | National Semiconductor

LM2767 Switched Capacitor Voltage Converter February 2000 LM2767 Switched Capacitor Voltage Converter General Description The LM2767 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +1.8V to +5.5V. Two low cost capacitors and a diode are used in this circuit to provide at least 15 m A of output current. The LM2767 operates at 11 k Hz switching frequency to avoid audio voice-band interference. With an operating current of only 40 µA (operating efficiency greater than 90% with most loads), the LM2767 provides ideal performance for battery powered systems. The device is manufactured in a SOT23-5 package. Features n n n n Doubles Input Supply Voltage SOT23-5 Package 20Ω Typical Output Impedance 96% Typical Conversion Efficiency at 15m A Applications n n n n n n Cellular Phones Pagers PDAs, Organizers Operational Amplifier Power Suppliers Interface Power Suppliers Handheld Instruments Basic Application Circuit Voltage Doubler DS101274-1 Ordering Information Order Number LM2767M5 LM2767M5X Package Number MA05B MA05B Package Marking S17B (Note 1) S17B (Note 1) Supplied as Tape and Reel (1000 units/reel) Tape and Reel (3000 units/reel) Note 1: The small physical size of the SOT-23 package does not allow for the full part number marking. Devices will be marked with the designation shown in the column Package Marking. © 2000 National Semiconductor Corporation DS101274 .national. Connection Diagram 5-Lead SOT (M5) DS101274-22 Actual Size DS101274-13 Top View With Package Marking Pin Description Pin 1 2 3 4 5 Name VOUT GND CAP- V+ CAP+ Function Positive voltage output. Power supply ground input. Connect this pin to the negative terminal of the charge-pump capacitor. Power supply positive voltage input. Connect this pin to the positive terminal of the charge-pump capacitor. .national....