SC1548 Semtech Corporation, SC1548 Datasheet
SC1548
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SC1548 Summary of contents
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... If the output drops below 50% of the nominal output voltage (typical) for greater than 4ms (typical), the output will be shut down. The SC1548 is available in a tiny 5-pin SOT-23 surface mount package. Typical Application Circuit Fixed Output Voltage Versions 1 ...
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... SC1548 ...
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... POWER MANAGEMENT Timing Diagram 2004 Semtech Corp. 4 SC1548 www.semtech.com ...
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... SC1548 ...
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... V 900 800 700 600 500 400 300 200 100 0 75 100 125 0 6 SC1548 Start Threshold vs. Junction Temperature 100 T (°C) J Enable Hysteresis vs. Junction Temperature = 12V falling (°C) J Enable Delay Time vs. Junction Temperature = 12V IN ...
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... T (°C) J Drive Output Voltage vs. Junction Temperature 12. 12V SNS 11. 0mA DRV 11.00 10.50 10.00 9.50 9. (°C) J OCP Trip Threshold (SC1548CSK-1.8) vs. Junction Temperature 1 12V 3. 0.8 0.6 0.4 0 (°C) J 2004 Semtech Corp. (1) 125 V IN 120 115 SNS 110 105 ...
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... Drive Pin Rise Time vs. Junction Temperature V = 12V IN V switched from 0V to 3.3V EN Two representative parts shown (°C) J SC1548CSK-1.8 Small Signal Gain and Phase Shift vs. Frequency I = 1.8A OUT Gain Phase 1.00E+03 1.00E+04 1.00E+05 Gain (dB) SC1548CSK Small Signal Gain and Phase Shift vs. Frequency V OUT ...
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... Semtech Corp. (1) Load Transient Response, Expanded Trace 1: V OUT Trace 2: V DRV Trace M3: load stepping from Timebase: 1µs/div Trace 1: V DRV Trace Timebase: 100ns/div t 36ns D(OFF) 9 SC1548 , AC coupled, 50mV/div. , 2V/div. Disable Delay Time, t D(OFF) , 1V/div. , 2V/div. www.semtech.com ...
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... Trace Timebase: 250ns/div t 550ns D(ON) Power-up Output Short Circuit Immunity r Trace 1: V DRV Trace Timebase: 2ms/div SC1548 enabled into a short, therefore V immediately the device is enabled. This device shuts down after 8ms. 10 SC1548 Enable Delay Time, t D(ON) , 1V/div. , 2V/div. , 5V/div. , 2V/div. OUT www.semtech.com < ...
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... MOSFET (see component selection, below). The SC1548 includes an active high enable control with an internal pullup resistor. If this pin is pulled low, the drive pin is pulled low, turning off the N-channel MOSFET. If the pin is left open or pulled up to 2.5V, 3.3V or 5V, then the drive pin will be enabled ...
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... OUT 12 SC1548 100 A Volts OUT ( FIXED ) R 2 VPWR 12V ENABLE SNS EN 2 GND 3 4 DRV IN SC1548CSK-X.X C4 0.1uF 12V IN VPWR ENABLE ADJ EN 2 GND 3 4 DRV IN SC1548CSK C4 0.1uF www.semtech.com ...
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... MAX ) 0.1µF ceramic capacitor. Layout Guidelines One of the advantages of using the SC1548 to drive an external MOSFET is that the bandgap reference and control circuitry do not need to be located right next to the power device, thus a very accurate output voltage can be obtained since heating effects will be minimal. ...
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... Y Y .043 Z Z .141 THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 14 SC1548 MILLIMETERS MAX MIN NOM MAX - .057 0.90 1.45 - .006 0.00 0.15 ...