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AIC2510PM5 Datasheet(PDF) 7 Page - Analog Intergrations Corporation |
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AIC2510PM5 Datasheet(HTML) 7 Page - Analog Intergrations Corporation |
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7 / 11 page  AIC2510 7 PIN DESCRIPTIONS PIN 1: IN Supply voltage input for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. PIN 2: OUT Internal switch. The voltage at this pin switches between (VIN-VSAT) and approximately -0.5V, with a duty cycle of approximately VOUT/VIN. PIN 3: GND Ground requires a short, low noise connection to ensure good load regulation. PIN 4: FB Feedback input for fixed-output or adjustable-output version. Connect directly to output for fixed operation version or to a resistor divider for adjustable operation versions. PIN 5: OFF / ON Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 80µA. Drive it high to disable the reference, control circuitry and internal switches. Drive low or connect to GND for normal operation. APPLICATION INFORMATION Thermal considerations The AIC2510 is available with TO-220-5, TO220B and TO-263-5 packages. The TO-220-5 and TO220B packages need a heat sink in most conditions. The TO-263-5 package is designed to be soldered to the copper on a printed circuit board. The printed circuit board is the heat sink for TO-263-5 package and other heat components, such as inductors and diodes. The size of the heat sink depends on the power loss of AIC2510 and the ambient temperature. The power loss of AIC2510 is determined by input voltage, output voltage and load current. The Fig.4 represents the curve of the AIC2510 case temperature in different conditions. The curve shows the AIC2510 temperature rises above ambient temperature for a 3A load with different input and output voltage. The values of the temperature rise, which are affected by factors such as sink size, heat produced from heat components, and etc., may be different from those in Fig.8 depending on the conditions of the application. According to the equation 1, as the power loss or ambient temperature is rising the heat sink size must be increased to decrease the thermal resistance ( jA R θ ) so that the junction temperature does not over 125 C. An appropriate increase of heat sink size may result in a normal- ranged junction temperature. jA A j D R T T P θ − = As junction temperature rises to its temperature protect point, the AIC2510 will stop working. Output voltage drops to zero until the junction temperature decreases to a normal range. |
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Similar Description - AIC2510PM5 |
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