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LX8610-25CST Datasheet(PDF) 3 Page - Microsemi Corporation |
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LX8610-25CST Datasheet(HTML) 3 Page - Microsemi Corporation |
3 / 6 page Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 Copyright © 2000 Rev. 0.6f,2000-09-15 LX8610-xx 1A BiCMOS Very Low Dropout Regulators PRELIMINARY DATASHEET A M I CROSEM I COM P A N Y VIN Positive supply input for the regulator. Bypass to GND with at least 2.2µF of low ESR, ESL capacitance if supply source is further than 1 inch from the device. VOUT Output for the regulator. It is recommended to bypass to GND with at least 10µF although this is not required for regulation, rather it is needed for transient response. Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a larger capacitor will improve the response to these load steps. GND Reference ground. The input and output bypass capacitors should be connected to this pin. In addition the tab on the SOT-223 package and pins 2,3,6, and 7 on the SOIC package are also used for heat sinking the device. ADJ Feedback pin for the regulator. For the LX8610-00, the output voltage can be set by two external resistors with the following relationship: VOUT = 1.25V * (1 + RA / RB) where RA is the resistor connected between VOUT and ADJ, and RB is the resistor connected between ADJ and GND. ENALBE Enable input. This pin has a threshold of about VIN / 2, it should be actively pulled high to enable the regulator. This can be accomplished with a resistive pull-up. When low, it turns off the regulator and puts the device in a low current shutdown state. V IN LX8610-00 IN ENABLE GND ADJ OUT V OUT V REF C IN C OUT R A R B 1 8 2,3 6,7 4 5 + = B A R R V V REF OUT 1 Figure 1 – Typical Application |
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