LM2765 Datasheet | National Semiconductor

LM2765 Switched Capacitor Voltage Converter March 2000 LM2765 Switched Capacitor Voltage Converter General Description The LM2765 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 up to 20 m A of output current. The LM2765 operates at 50 k Hz switching frequency to reduce output resistance and voltage ripple. With an operating current of only 130 µA (operating efficiency greater than 90% with most loads) and 0.1µA typical shutdown current, the LM2765 provides ideal performance for battery powered systems. The device is manufactured in a SOT-23-6 package. Features n n n n n Doubles Input Supply Voltage SOT23-6 Package 20Ω Typical Output Impedance 90% Typical Conversion Efficiency at 20 m A 0.1µA Typical Shutdown Current Applications n n n n n n Cellular Phones Pagers PDAs Operational Amplifier Power Supplies Interface Power Supplies Handheld Instruments Basic Application Circuits Voltage Doubler DS101281-1 Connection Diagram 6-Lead SOT (M6) DS101281-22 Actual Size DS101281-13 Top View With Package Marking Ordering Information Order Number LM2765M6 LM2765M6X Package Number MA06A MA06A Package Marking S15B (Note 1) S15B (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 DS101281 .national. Pin Description Pin 1 2 3 4 5 6 Name V+ GND CAP- SD VOUT CAP+ Power supply ground input. Connect this pin to the negative terminal of the charge-pump capacitor. Shutdown control pin, tie this pin to ground in normal operation. Positive voltage output. Connect this pin to the positive terminal of the charge-pump capacitor. Function Power supply positive voltage...