MAX1745EUB+T Maxim Integrated Products, MAX1745EUB+T Datasheet
MAX1745EUB+T
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MAX1745EUB+T Summary of contents
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... Wall-Cube-Powered Devices Industrial Control Systems ® ® Firewire /IEEE 1394 μMAX is a registered trademark of Maxim Integrated Products, Inc. Firewire is a registered trademark of Apple, Inc. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. Typical Operating Circuit IN 4.5V TO 36V ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX ABSOLUTE MAXIMUM RATINGS IN, EXT, SHDN to GND...........................................-0.3V to +38V VH to GND..............................................................-0.3V to +34V VH, EXT to IN............................................................-7V to +0.3V CS, OUT to GND ....................................................-0.3V to +20V FB, 3/5, REF to GND .....................................-0.3V ...
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ELECTRICAL CHARACTERISTICS ( 5.5V to 36V, 3/5 = GND, I LOAD = -40°C to +85°C, unless otherwise noted.) (Note 1) SHDN PARAMETER Input Voltage Range Supply Current into IN Shutdown Supply Current ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX ELECTRICAL CHARACTERISTICS ( 5.5V to 36V, 3/5 = GND, I LOAD = -40°C to +125°C, unless otherwise noted.) (Note 1) SHDN PARAMETER Input Voltage Range Supply ...
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Figure +25°C, unless otherwise specified.) A EFFICIENCY vs. LOAD CURRENT (V = +3.3V) OUT 100 +5. +12. ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX (Circuit of Figure +25°C, unless otherwise specified.) A REFERENCE OUTPUT VOLTAGE CHANGE vs. TEMPERATURE -50 - TEMPERATURE (°C) ...
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NAME PIN MAX1744 MAX1745 1 GND GND REF REF 4 3/5 — 4 — OUT OUT SHDN SHDN EXT EXT Detailed Description The ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX INPUT 4.5V TO 36V C2 0.47μF 4.7μF LOW ESR ON OFF 5V 3.3V Figure 1. Typical Application Circuit 100% Duty Cycle and Dropout The MAX1744/MAX1745 operate with a duty cycle up to 100%. This ...
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SHDN MAX1745 ONLY - - - MAX1744 ONLY Figure 2. Simplified Functional Diagram lower frequencies, reducing the MOSFET gate drive and switching losses. In discontinuous mode, under most circumstances, the on-time will be the fixed mini- mum ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX 10μs/div CIRCUIT OF FIGURE 18V OUT A: MOSFET DRAIN, 10V/div B: OUT, 50mV/div, 3.3V DC OFFSET C: INDUCTOR CURRENT, 1A/div Figure 3. Discontinuous-Conduction Mode, Light-Load-Current Waveform ...
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For 1% error, the current through R2 should be at least 100 times FB’s input bias current. Current-Sense-Resistor Selection The current-sense comparator limits the peak switching current where R CS SENSE SENSE the current-sense resistor ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX Table 1. Component Suppliers COMPANY COUNTRY PHONE 803-946-0690 AVX USA or 800-282-4975 USA Coilcraft 847-639-6400 USA Coiltronics 516-241-7876 USA Dale/Vishay 402-564-3131 USA Kemet 408-986-0424 Inter nati onal USA 310-322-3331 Recti fi er USA IRC ...
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IN, caused by the circuit’s switching action. Use a low-ESR capacitor. Two smaller-value low-ESR capacitors can be connected in parallel if necessary. Choose input capacitors with working voltage ratings higher than the maximum input voltage. Place a surface-mount ...
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High-Voltage, Step-Down DC-DC Controllers in µMAX For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 10 μMAX Note: MAX1744/MAX1745 do not feature exposed pads. 14 ______________________________________________________________________________________ Package Information PACKAGE CODE U10CN+1 α α DOCUMENT NO. ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2009 Maxim Integrated Products High-Voltage, Step-Down DC-DC Controllers in µ ...