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AMC7637-2.5 Datasheet(PDF) 2 Page - ADDtek Corp |
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AMC7637-2.5 Datasheet(HTML) 2 Page - ADDtek Corp |
2 / 7 page AMC7637 Copyright © 2007 ADDtek Corp. 2 DD053_C -- JUNE 2007 ABSOLUTE MAXIMUM RATINGS (Note) Input Voltage, VIN 8V Maximum Operating Junction Temperature, TJ 150 ° C Storage Temperature Range -65 ° C to 150 ° C Lead Temperature (soldering, 10 seconds) 260 ° C Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. THERMAL DATA Thermal Resistance from Junction to Ambient, θ JA 250 OC /W Junction Temperature Calculation: TJ = TA+ (PD × θ JA). The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. Connect the ground pin to ground using a large pad or ground plane for better heat dissipation. All of the above assume no ambient airflow. Maximum Power Calculation: TJ(MAX) – TA(MAX) PD(MAX)= θ JA TJ( OC): Maximum recommended junction temperature TA( OC): Ambient temperature of the application θ JA( OC /W): Junction-to-Ambient temperature thermal resistance of the package, and other heat dissipating materials. The maximum power dissipation for a single-output regulator is: PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ Where: VOUT(NOM) = the nominal output voltage IOUT(NOM) = the nominal output current, and IQ = the quiescent current the regulator consumes at IOUT(MAX) VIN(MAX) = the maximum input voltage Then θ JA = (125 OC – TA)/PD BLOCK DIAGRAM GND VIN VOUT Current Limiter VREF |
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