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LX8815-2800CDF Datasheet(PDF) 1 Page - Microsemi Corporation |
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LX8815-2800CDF Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 5 page Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 Copyright © 2000 Rev. 0.2a, 2000-11-20 LX8815 Dual Channel 1A Low Dropout Regulator PRELIMINARY A M I CROS E M I COM P A N Y The LX8815 is a dual channel positive-voltage linear regulator. This dual regulator has either one fixed output coupled with an adjustable output or two fixed outputs. Each channel features low-dropout and high accuracy. The LX8815 provides designers with a flexible power management solution, minimal printed circuit board area, and shorter design cycles. Each channel can supply up to one amp independently with a regulator design optimized for system efficiency by consuming minimal ground current and directing quiescent current to the load. The LX8815 features on-chip trimming of the internal voltage reference enabling precise output voltages, typically ±1% of it’s specified value, while the BiPolar output transistor has a low dropout voltage even at full output current (VDO < 1.1V typ. @ 1A). Thermal and Short Circuit Current Protection are integrated on-chip and operate independently for each regulator output. The LX8815 regulator is stable with a low-value output capacitor, typically 3.3 µF tantalum or 4.7µF ceramic on the outputs, allowing designers flexibility in external component selection. Linfinity’s S-PAK power package offers maximum power dissipation and ease of assembly using surface mount technology. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com Two Independent Regulated Outputs Accurate Output Voltages Max. Dropout of 1.1V at Rated Current Independent Thermal and Current Limit Protection Low Profile 5 Lead SMT Power Package Low Tolerance Line (0.2%) and Load (0.4%) Regulation Wide DC Supply Voltage of 4.0V to 12.0V Loop Stability Independent of Output Capacitor Type 5V to 3.3V Linear Regulator Low Voltage Logic Supplies Active SCSI Terminators Battery Charging Circuits Instrumentation PC Peripherals BIAS 1.25V V REF 1 3 V IN GND 5 4 2 + + - - V OUT1 V OUT2 R 3 0.1 Ω C 1 10 µF C 2 4.7 µF R 1 R 2 C 3 4.7 µF 2 2 1 2 1 25 . 1 R I R R V ADJ OUT × + + × = Note: Application circuit above using ceramic capacitors, C 1 requires R 3 (0.075 to 0.3Ω). For Tantalum capacitors: R 3 is not used and C 1, C 2, and C 3 > 2 µF. R1 and R2 used with LX88xx-xx only. Adjustable or Fixed |
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