LT1640AHCS8 Linear Technology, LT1640AHCS8 Datasheet
LT1640AHCS8
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LT1640AHCS8 Summary of contents
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... LT1640AH for modules with a high enable input. The LT1640AL/LT1640AH are available in 8-pin PDIP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. 1 PWRGD DRAIN 7 † ...
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... UV Low to High Transition UV High to Low Transition Low to High Transition OV High to Low Transition ORDER PART NUMBER TOP VIEW 8 V LT1640AHCN8 DD LT1640AHCS8 7 DRAIN LT1640AHIN8 6 GATE LT1640AHIS8 SENSE 5 S8 PACKAGE S8 PART MARKING 8-LEAD PLASTIC SO = 120 C/W (N8) JA 1640AH = 150 C/W (S8) JA 640AHI = 0V unless otherwise noted. EE ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER V Power Good Threshold PG V Power Good Threshold Hysteresis PGHY I Drain Input Bias Current DRAIN V PWRGD Output Low Voltage OL PWRGD Output Low Voltage (PWRGD – ...
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LT1640AL/LT1640AH W U TYPICAL PERFOR A CE CHARACTERISTICS Gate Voltage vs Temperature 15 48V DD 14.5 14.0 13.5 13.0 12.5 12.0 – 50 – 100 TEMPERATURE ( C) 1640A G04 Gate Pull-Down Current ...
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PIN FUNCTIONS OV (Pin 2): Analog Overvoltage Input. When OV is pulled above the 1.223V low-to-high threshold, an overvoltage condition is detected and the GATE pin will be immediately pulled low. The GATE pin will remain low ...
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LT1640AL/LT1640AH TEST CIRCUIT TIMING DIAGRAMS 2V 1.223V PHLOV GATE 1V Figure GATE Timing 50mV SENSE t PHLSENSE GATE 1V Figure 4. SENSE to GATE Timing PWRGD/PWRGD ...
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U U APPLICATIO S I FOR ATIO Hot Circuit Insertion When circuit boards are inserted into a live – 48V backplane, the bypass capacitors at the input of the board’s power module or switching power supply can draw huge tran- ...
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LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO Capacitor C1 and resistor R3 prevent Q1 from momen- tarily turning on when the power pins first make contact. Without C1 and R3, capacitor C2 would pull the gate ...
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U U APPLICATIO S I FOR ATIO Electronic Circuit Breaker The LT1640A features an electronic circuit breaker func- tion that protects against short circuits or excessive sup- ply currents. By placing a sense resistor between the V and SENSE pin, ...
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LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO Under some conditions, a short circuit at the output can cause the input supply to dip below the UV threshold, resetting the circuit breaker immediately. The LT1640A then cycles on and off ...
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U U APPLICATIO S I FOR ATIO Undervoltage and Overvoltage Detection The UV (Pin 3) and OV (Pin 2) pins can be used to detect undervoltage and overvoltage conditions at the power supply input. The UV and OV pins are ...
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LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO The new threshold voltage when the input moves from low to high is • • UVH R 2 • ...
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U U APPLICATIO S I FOR ATIO When the DRAIN voltage of the LT1640AL is high with respect the internal pull-down transistor Q2 is off EE and the PWRGD pin high impedance state (Fig- ...
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LT1640AL/LT1640AH U U APPLICATIO S I FOR ATIO (SHORT PIN) GND GND R4 562k 9.09k 10k – 48V * DIODES INC. SMAT70A PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 ...
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... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Supplies, 1V Precharge, Local PCI Reset Logic Dual ON Pins for Supplies from 3V to 15V LUCENT JW050A1 OUT 8 + SENSE + 2 7 ON/OFF TRIM + 100 F 0.1 F – SENSE 100V 100V 4 5 – – OUT CASE 3 1640A F14 1640alahf LT/TP 0501 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2001 5V C7 100 F 16V ...