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AMS2954C-X Datasheet(PDF) 4 Page - Advanced Monolithic Systems |
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AMS2954C-X Datasheet(HTML) 4 Page - Advanced Monolithic Systems |
4 / 15 page Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS2954 Note 8: The junction-to-ambient thermal resistance are as follows:60 °C/W for the TO-220 (T), 73°C/W for the TO-263 (M), 80°C/W for the TO-252 (D), 90 °C/W for the SOT-223 (with package soldering to copper area over backside ground plane or internal power plane ϕ JA can vary from 46°C/W to >90°C/W depending on mounting technique and the size of the copper area), 105 °C/W for the molded plastic DIP (P) and 160°C/W for the molded plastic SO-8 (S). Note 9: May exceed input supply voltage. Note 10: When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped to ground. Note 11: Vshutdown ≥ 2V, Vin ≤ 30V, Vout =0, Feedback pin tied to 5VTAP. Note 12: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 13: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 50mA load pulse at VIN =30V (1.25W pulse) for T =10 ms. Note 14: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 15: Line regulation for the AMS2954 is tested at 150 °C for I L = 1 mA. For IL = 100 µA and TJ = 125°C, line regulation is guaranteed by design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current. BLOCK DIAGRAM AND TYPICAL APPLICATIONS AMS2954-XX 3 Lead Packages AMS2954-XX 8 Lead Packages INPUT OUTPUT GROUND ERROR AMPLIFIER 1.23V REFERENCE UNREGULATED DC V OUT I L≤ 150mA SEE APPLICATION HINTS + + + + - INPUT OUTPUT GROUND ERROR AMPLIFIER 1.23V REFERENCE UNREGULATED DC V OUT I L≤ 150mA SEE APPLICATION HINTS + + + + - FEED- BACK SHUT- DOWN SENSE V TAP ERROR TO CMOS OR TTL + - + 330k Ω 4 5 6 2 1 8 7 3 FROM CMOS OR TTL 50mV ERROR DETECTION COMPARATOR |
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