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LX13088ACLD-TR Datasheet(PDF) 2 Page - Microsemi Corporation |
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LX13088ACLD-TR Datasheet(HTML) 2 Page - Microsemi Corporation |
2 / 12 page LX13088A PRODUCTION DATASHEET Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 Copyright © 2010 Rev. 1.0, 2010-09-23 Dual 1A Step-Down Converters TM ® ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT PVIN, AVIN to AGND, PGND......................................................................-0.3 to +7.0 V SW1 and SW2 to AGND, PGND .................................................. PGND -2V to xVIN+2V All other pins to AGND.................................................................... -0.3V to xVIN + 0.3V Operating Junction Temperature Range .......................................................... 00C to 1500C Storage Temperature Range..........................................................................–650C to 1500C Package Peak Temp. for Solder Reflow (40 seconds maximum exposure) ..260°C (+0 -5)0C Notes: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. PGND must be wired to AGND externally. LD PACKAGE (Top View) Marking RoHS / Pb-free 100% Matte Tin Finish FUNCTIO N AL PIN DESCRIP T ION Name Pin # Description FB2 1 Feedback from VO2. Connect voltage divider to the load side of VO2 output inductor-capacitor filter. AVIN 2 Analog Input. Input to power the internal circuitry of the device, connect to PVIN through a 10Ω resistor and bypass through a 1μF ceramic capacitor between this pin and PGND, as close to the LX13088A as possible. PVIN 3 Control MOSFET switch power inputs. Connect a 10µF ceramic capacitor between this pin and PGND, as close to the LX13088A as possible. SW2 4 Converter 2 synchronous buck switching output. Connect to VO2 inductor. PGND 5 Power Ground Connection. Synchronous rectifier MOSFET source. Provide a star connection between this pin, VO1, VO2 filter capacitor returns, VIN input capacitor return, and AGND. Keep the star connection as close to the LX13088A IC as possible. SW1 6 Converter 1 synchronous buck switching output. Connect to VO1 inductor. E/S 7 Enable/Synchronization. Pulling this pin high statically enables the LX13088A and pulling the pin low statically will shut down the LX13088A. Applying a pulse to this pin will synchronize SW1 and SW2 switching frequency to ½ the external clock frequency. POR 8 Power On Reset output pin. Monitors FB1, FB2 output voltage levels and VIN. POR is pulled low if an output voltage droop is detected on FB1 or FB2 or VIN, and is Hi-Z during normal operation. VMON 9 Voltage Monitor – Supervisor for one external voltage (could be input voltage). The POR output is triggered if this output falls below the VMON threshold. FB1 10 Feedback from VO1. Connect voltage divider to the load side of VO1 output inductor-capacitor filter. AGND PAD Analog Ground. Connect the exposed pad on the bottom of the package to the GND plane for a thermal heat sink. 088A Date/Lot Code MSC |
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