lx1918 Microsemi Corporation, lx1918 Datasheet
lx1918
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lx1918 Summary of contents
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... The LX1918 features include soft start, cycle-by-cycle switch current limit, hiccup short circuit current limiting and thermal shut down. The LX1918 comes in small 8 pin MLP package (fully RoHS compliant). http://www.microsemi.com PWR ...
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... A 35 – 50°C/W MBIENT θ directly affected Description Microsemi Integrated Products Division LX1918 RODUCTION ATA HEET SGND 3 ...
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... V E/S MODE IN V MODE(HI) V MODE(LO) Peak Current V UVLO Microsemi Integrated Products Division LX1918 RODUCTION ATA HEET ≤ ≤ -40°C T 85°C except A = GND MODE LX1918 Min Typ Max 2.7 6.0 92 350 500 0.5 1 0.588 0.600 0.612 -50 50 0.75 1.00 1.25 0.1 1.0 1.6 0.4 500 1250 100 1.0 2.0 0 ...
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... 2.7A Current Limit - + + - Current Sense Slope Compensation Compensation Cur Limit Synchronous FET Driver LOGIC R Q Thermal Overload Q S Figure 1 – Simplified Block Diagram Microsemi Integrated Products Division LX1918 RODUCTION ATA HEET FET Drivers + - Reverse Current Detect SW PGND Page 4 ...
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... LX1918 L1 SW PWR 3.3µH 40.2 VCC FB LX1918 E/S MODE PGND SGND LX1918 L1 SW PWR 3.3µH 40.2 VCC FB LX1918 E/S MODE PGND SGND Microsemi Integrated Products Division LX1918 D S ATA HEET 1.8V @ 1.5A 47µF R1 20K R2 10K 1.5V @ 1.5A 47µF R1 15k R2 10k Page 5 ...
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... V . The LX1918 can deliver a maximum IN output current up to 1.8A. The LX1918 has two selectable operating modes for light loads: high efficiency PFM (MODE=GND) or low noise forced PWM (MODE=VCC). Under heavy load, LX1918 always operates in PWM mode ...
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... Iout max DC Load vs Duty Cycle 1.9 1.8 1.7 1.6 1.5 1.4 1.3 0% 4.7 5.2 Microsemi Integrated Products Division LX1918 D S ATA HEET reg-low emi reg - hi eff 500 1000 1500 Output Current (mA) reg-low emi reg - hi eff 500 1000 ...
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... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 1.8A Step-Down Synchronous Converter Dim bottom A3 Note: 1. Dimensions do not include mold flash or Microsemi Integrated Products Division LX1918 RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX A 0.80 1.00 ...
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... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2004 Rev. 1.1, 2005-07-05 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 1.8A Step-Down Synchronous Converter P RODUCTION Microsemi Integrated Products Division LX1918 D S ATA HEET Page 9 ...