cs51031 ON Semiconductor, cs51031 Datasheet
cs51031
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cs51031 Summary of contents
Page 1
... The CS51031 is a switching controller for use in DC−DC converters. It can be used in the buck topology with a minimum number of external components. The CS51031 consists monitor for controlling the state of the device, 1.0 A power driver for controlling the gate of a discrete P−Channel transistor, fixed frequency oscillator, short circuit protection timer, programmable Soft− ...
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... CS51031YD8 CS51031YD8G −40°C < T CS51031YDR8 CS51031YDR8G CS51031GD8 CS51031GD8G CS51031GDR8 CS51031GDR8G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. MAXIMUM RATINGS Power Supply Voltage Driver Supply Voltage, V ...
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... Turn−Off Threshold Hysteresis Current Drain I 4.5 V < 3.0 V < Shutdown Guaranteed by design, not 100% tested in production. CS51031 ≤ 3.0 V ≤ < 125°C: Commercial Grade: 0°C < T < 70°C; 0°C < Test Conditions = 1 470 pF OSC < 2.0 V COSC > ...
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... V − THEORY OF OPERATION Control Scheme The CS51031 monitors the output voltage to determine when to turn on the P−Ch FET falls below the internal FB reference voltage of 1.25 V during the oscillator’s charge cycle, the P−Ch FET is turned on and remains on for the CS51031 ...
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... T moves lower and the voltage at V below 1.15 V, the output of the fault comparator goes high I T and the CS51031 goes into a fast discharge mode. The fault 5 timing capacitor, CS, discharges to 2 the V is still below 1.15 V when the CS pin reaches 2 valid fault condition has been detected. The slow discharge comparator output goes high and enables gate G5 which sets the slow discharge flip− ...
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... R2 and the reference voltage V Q1 switches on and current flows through the inductor to the output. The inductor current rises at a rate determined by (V − OUT CS51031 is limited to 80%. If output voltage remains higher than nominal during the entire C drops does not turn on, skipping the pulse ...
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... The output capacitor limits the output ripple voltage. The CS51031 needs a maximum output ripple for the feedback comparator to change state assume that all the inductor ripple current flows through the output capacitor and that ideal capacitor (i ...
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... A low ESR capacitor of at least 100 mF is good. A ceramic surface mount capacitor should also be connected between V noise. 10) MOSFET Selection The CS51031 drives a P−Channel MOSFET. The V pin swings from GND to V depends on the operating conditions but for input voltages 10 5 1.5 below 7 logic level FET should be used. A P− ...
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... *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE THERMAL DATA Parameter R qJC R qJA CS51031 PACKAGE DIMENSIONS SOIC−8 NB CASE 751−07 ISSUE 0.10 (0.004) ...
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... USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 10 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. CS51031/D ...