ADM1070 Analog Devices, ADM1070 Datasheet
ADM1070
Specifications of ADM1070
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ADM1070 Summary of contents
Page 1
... Programmable Current Limiting Circuit –48 V Power Supply Modules GENERAL DESCRIPTION The ADM1070 is a negative voltage hot swap controller that allows a board to be safely inserted and removed from a live –48 V backplane. The part achieves this by providing robust current limiting, protection against transient and nontransient short circuits and overvoltage and undervoltage conditions ...
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... ADM1070–SPECIFICATIONS Parameter BOARD SUPPLY (not connected directly to device) Maximum Voltage Range Typical Operating Voltage Range VIN PIN––SHUNT REGULATOR Operating Supply Voltage Range Quiescent Supply Current Maximum Shunt Supply Voltage Undervoltage Lockout, V LKO UV/OV PIN––UNDERVOLTAGE AND ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADM1070 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... No external compensation is required. When the FET is fully enhanced and the load capacitance has been charged, the GATE Pin reaches a high level of typically 12 V. PIN CONFIGURATION SENSE GATE 1 6 ADM1070ART V 2 TOP VIEW 5 UV/OV EE (Not to Scale) V ...
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... TPC 5. Undervoltage Lockout 100 –5– ADM1070 –45 –35 –25 –15 – TEMPERATURE – C TPC 4. V vs. Temperature –50 –35 –20 – TEMPERATURE – C vs. Temperature ...
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... ADM1070 120 115 110 105 100 –50 –35 –20 – TEMPERATURE – C TPC 7. Analog Current Limit Voltage, V Temperature 150 145 140 135 130 125 120 115 110 105 100 –50 –35 –20 – TEMPERATURE – C TPC 8. Fast Current Limit Voltage, V ...
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... TPC 17. I –60 –40 –20 UV HIGH LOW 60 80 100 120 –7– ADM1070 OV HIGH OV LOW –50 –35 –20 – TEMPERATURE – C TPC 16. OV Threshold vs. Temperature –50 –35 –20 – TEMPERATURE – C vs. Temperature (V ...
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... ADM1070 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 –50 –35 –20 – TEMPERATURE – C TPC 19. POR Delay vs. Temperature 4.0 3.5 3.0 2.5 2.0 1.5 - 1.0 0.5 0 –50 –35 –20 – TEMPERATURE – C TPC 20. Voltage Fault Filter Time vs. Temperature –50 –35 –20 – TEMPERATURE – C TPC 21. Maximum Current Limit On Time vs. ...
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... These transient currents can cause glitches on the system power supply and can permanently damage components on the board. The ADM1070 is designed to control the manner in which a board’s supply voltage is applied so that harmful transient currents do not occur and the board can be safely inserted or removed from a live backplane ...
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... Note that this is unrelated to the undervoltage and overvoltage functions performed at the UV/OV Pin. , and I LIMIT(MAX) TIMER I The TIMER Pin on the ADM1070 gives the user control over LIMIT(MAX) (A) the timing functions on the part. By connecting an external capacitor between the TIMER Pin and V 22.0 UV/OV glitch filter time ...
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... UV/OV Pin, which is proportional to the supply voltage. By choosing this ratio carefully, the ADM1070 can be programmed to apply the supply voltage to the load only when it is within specific thresholds. For example, for kΩ and kΩ the typical operating range is 36 ...
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... now inside the operating voltage window and the –48 V supply must be applied to the load. After a time delay the ADM1070 begins to ramp up the gate drive. When the POR voltage on the SENSE Pin reaches 100 mV (the analog current limit) the gate drive is held constant. When the board capaci- ...
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... ACL again (it will if the fault is still present). This cycle repeats itself a total of seven times. Figure 12 shows the seven consecutive faults occurring on an even wider timebase. If the ADM1070 detects seven consecutive current faults, the part then latches off (after a total time t GATE ...
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... ADM1070 Figure 13 shows the behavior of ADM1070 when a temporary current fault occurs followed by a permanent current fault. When the first overcurrent fault occurs, the first 100 mV spike on the sense line can be seen. During the t fault corrects itself. After this time period fault condition is detected and the limited consecutive counter is reset ...
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... MAX REV. 0 OUTLINE DIMENSIONS 6-Lead Plastic Surface-Mount Package [SOT-23] (RT-6) Dimensions shown in millimeters 2.90 BSC 2.80 BSC 1.60 BSC PIN 1 0.95 BSC 1.90 1.30 BSC 1.15 0.90 1.45 MAX 0.22 0.08 0.50 SEATING 0.30 PLANE COMPLIANT TO JEDEC STANDARDS MO-178AB –15– ADM1070 0. 0.45 0.30 ...
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