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LP2966 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LP2966 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 15 page LP2966 Dual 150mA Ultra Low-Dropout Regulator General Description The LP2966 dual ultra low-dropout (LDO) regulator operates from a +2.70V to +7.0V input supply. Each output delivers 150mA over full temperature range. The IC operates with ex- tremely low drop-out voltage and quiescent current, which makes it very suitable for battery powered and portable ap- plications. Each LDO in the LP2966 has independent shut- down capability. The LP2966 provides low noise perfor- mance with low ground pin current in an extremely small MSOP-8 package (refer to package dimensions and connec- tion diagram for more information on MSOP-8 package). A wide range of preset voltage options are available for each output. In addition to the voltage combinations listed in the ordering information table, many more are available upon re- quest with minimum orders. In all, 256 voltage combinations are possible. Key Specifications Dropout Voltage: Varies linearly with load current. Typically 0.9 mV at 1mA load current and 135mV at 150mA load cur- rent. Ground Pin Current: Typically 300µA at 1mA load current and 340µA at 100mA load current (with one shutdown pin pulled low). Shutdown Mode: Less than 1µA quiescent current when both shutdown pins are pulled low. Error Flag: Open drain output, goes low when the corre- sponding output drops 10% below nominal. Precision Output Voltage: Multiple output voltage options available ranging from 1.8V to 5.0V with a guaranteed accu- racy of ±1% at room temperature. Features n Ultra low drop-out voltage n Low ground pin current n < 1µA quiescent current in shutdown mode n Independent shutdown of each LDO regulator n Output voltage accuracy ±1% n Guaranteed 150mA output current at each output n Low output noise n Error Flags indicate status of each output n Available in MSOP-8 surface mount packages n Low output capacitor requirements (1µF) n Operates with Low ESR ceramic capacitors in most applications n Over temperature/over current protection n -40˚C to +125˚C junction temperature range Applications n Cellular and Wireless Applications n Palmtop/Laptop Computer n GPS systems n Flat panel displays n Post regulators n USB applications n Hand held equipment and multimeters n Wireless data terminals n Other battery powered applications Typical Application Circuit DS100850-30 *SD1 and SD2 must be actively terminated through a pull up resistor. Tie to VIN if not used. **ERROR1 and ERROR2 are open drain outputs. These pins must be connected to ground if not used. # Minimum output capacitance is 1µF to insure stability over full load current range. More capacitance improves superior dynamic performance and provides additional stability margin. April 2000 © 2000 National Semiconductor Corporation DS100850 www.national.com |
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