SC4250LISTRT Semtech, SC4250LISTRT Datasheet
SC4250LISTRT
Specifications of SC4250LISTRT
Related parts for SC4250LISTRT
SC4250LISTRT Summary of contents
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... Central office switching -48V Distributed power systems Power supply hotswap & inrush control U1 SC4250 1 8 PWRGD /PWRGD VCC DRAIN GATE 4 5 VEE SENSE C2 C3 0.001 0.33 R4 0.01 Figure 1 1 SC4250 Negative Voltage Hot Swap Controller C1 0.1 Vee VEE C4 R6 18k 3.3nF C5 150 www.semtech.com ...
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... Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied Electrical Characteristics Unless specified 25° 48V Values in bold apply over full operating temperature range 2005 Semtech Corp 0V SC4250 ...
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... POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified 25° 48V Values in bold apply over full operating temperature range Note: (1) This device is ESD sensitive. Use of standard ESD handling precaution is required. 2005 Semtech Corp > < SC4250 www.semtech.com µ µ µ A µ s µ s µ s µ ...
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... POWER MANAGEMENT Pin Configuration TOP VIEW PWRGD/PWRGD VEE 4 (SO-8) Pin Descriptions 2005 Semtech Corp. Ordering Information VCC S 7 DRAIN GATE Notes: (1) Only available in tape and reel packaging. A reel 5 SENSE contains 2500 devices. (2) Lead free product. This product is fully WEEE and RoHS compliant ...
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... Block Diagrams Active High PWRGD Vcc 12.5V Reg 60mV + Vee SENSE Active Low PWRGD Vcc 12.5V Reg 60mV + Vee SENSE 2005 Semtech Corp. 1.223V 50uA _ +7V + Delay GATE DRAIN 1.223V 50uA _ +7V + Delay GATE DRAIN 5 SC4250 PWRGD _ + 1.75V PWRGD _ + 1.75V www.semtech.com ...
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... -48V 2005 Semtech Corp. Resistors R1, R2 and R3 make up a voltage divider to set the Under-Voltage (UV) and Over-Voltage (OV) trip points. When the input power supply ramps up the UV trips at 1.273V and OV trips at 1.223V; during the ramp down transition the UV trips at 1.223V and OV trips at 1.198V. ...
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... With the values shown in the schematic the actual inrush current will be about 2A, which is within the limits we have chosen. 2005 Semtech Corp. Resistor R5 will produce a time constant which prevents Q1 from turning on when power is initially applied and the circuit is not ready to actively pull the gate low. It’s value is not critical and 18k ensures the adequate delay ...
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... Below are the snap-shots taken at start-up with different loading conditions and during the application of the over- current at the output of the circuit. For all figures, Ch1 Ch2: V DRAIN Figure 3. Start-up with no load. Figure 5. Start-up with “over the limit” load. 2005 Semtech Corp. ; Ch3: PWRGD; Ch4: V (Input current) GATE R4 8 SC4250 Figure 4 ...
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... For all figures, Ch1 Ch2: V DRAIN Figure 7. Start-up with no load. Figure 9. Start-up with “over the limit” load. 2005 Semtech Corp. ; Ch3: PWRGD (referenced to V GATE 9 SC4250 ); Ch4: V ...
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... POWER MANAGEMENT Evaluation Board Schematic ND(rem ote) C1 0.1 R1 562k R2 9.31k C2(opt) R3 0.01 10.2k -- 48V Evaluation Board 2005 Semtech Corp. U1 SC4250H PWRGD/PWR AIN R 6 18k GATE 4 5 VEE SENSE 0. 0.01 IRF1310 Figure 11 Figure 12 10 SC4250 R 7 Copt (opt) 0.1 ON/OFF +Vout +Vin C4 3 ...
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... POWER MANAGEMENT Evaluation Board - Bill of Materials 2005 Semtech Corp SC4250 www.semtech.com ...
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... Minimum Land Pattern - SO-8 X (C) P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 300A. Contact Information Phone: (805)498-2111 FAX (805)498-3804 2005 Semtech Corp. A DIM MIN .053 N A1 .004 A2 .049 ...