LTC1645IS#TRPBF Linear Technology, LTC1645IS#TRPBF Datasheet
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LTC1645IS#TRPBF
Specifications of LTC1645IS#TRPBF
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LTC1645IS#TRPBF Summary of contents
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... An additional spare com- parator is available for monitoring a second supply voltage. The LTC1645 is available in the 8- and 14-pin SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. V 0.005 * IRF7413 OUT2 3 ...
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LTC1645 ABSOLUTE AXI U RATI GS Supply Voltage ( ................................. 13.2V CC1 CC2 Input Voltage + FB, ON, COMP ..................... – 0. TIMER ................................................. – 0.3V to 2.5V SENSE1 ..................... (V – ...
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ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T 2.375V V 12V, 1.2V V 12V unless otherwise noted (Note 2). CC1 CC2 SYMBOL PARAMETER V TIMER Pin Voltage Threshold TM ...
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LTC1645 W U TYPICAL PERFOR A CE CHARACTERISTICS GATE Voltage vs Supply Voltage HIGHEST V (V) CC 1645 ...
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CTIO S (14-Lead Package/8-Lead Package) V (Pin 1/Pin 1): Positive Supply Input. V CC2 from 1.2V to 12V for normal operation. I 0.2mA. An undervoltage lockout circuit disables the LTC1645 whenever the voltage at V ...
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LTC1645 CTIO S (14-Lead Package/8-Lead Package) Whenever the timer is inactive, an internal N-channel FET shorts the TIMER pin to ground. Activating the timer connects current source from V and the voltage ...
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U U APPLICATIO S I FOR ATIO Hot Circuit Insertion When a circuit board is inserted into a live backplane, the supply bypass capacitors on the board can draw huge transient currents from the backplane power bus as they charge. ...
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LTC1645 U U APPLICATIO S I FOR ATIO Power Supply Ramping The power supplies on a board are controlled by placing external N-channel pass transistors in the power paths as shown in Figure 2. Consult Table 1 for a selection ...
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U U APPLICATIO S I FOR ATIO No bulk capacitance is present to slow the rate of rise and heavily damp the parasitic resonance. Instead, the fast edge shock excites a resonant circuit formed by a combi- nation of wiring ...
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LTC1645 U U APPLICATIO S I FOR ATIO D1* POWER LEADS + 12V – ON SEMICONDUCTOR * 1SMA12CAT3 + 12V – 12V 0V 1 s/DIV (a) V Waveform Damped by a Snubber (15 , 6.8nF ...
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U U APPLICATIO S I FOR ATIO Supply Glitching LTC1645 Hot Swap circuits on the backplane are generally used to provide power-up/down sequence at insertion/ removal as well as overload/short-circuit protection short-circuit occurs at supply ramp-up, the circuit ...
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LTC1645 U U APPLICATIO S I FOR ATIO nearly unlimited current flow. The LTC1645 discharges the GATE pin in a few microseconds, but during this discharge time current on the order of 150 amperes flows from the V power supply. ...
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U U APPLICATIO S I FOR ATIO voltage on the external capacitor C TIMER with a slope dv/ A/C . When the voltage reaches TIMER the trip point (1.23V), the timer is reset by pulling the TIMER pin ...
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LTC1645 U U APPLICATIO S I FOR ATIO An external hard reset is initiated at time point 6. The ON pin is forced below 0.8V but above 0.4V, and the GATE n pin voltages start to ramp down. V OUT ...
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U U APPLICATIO S I FOR ATIO V IN2 5V/DIV V IN1 5V/DIV V OUT2 5V/DIV V OUT1 5V/DIV TIMER 2V/DIV RESET 5V/DIV Figure 16. Ramping 3.3V and 2.5V Up and Down Together This circuit guarantees that: ( ...
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LTC1645 U U APPLICATIO S I FOR ATIO BOTH CURRENT LIMITS: 10A V IN2 3.3V 0.005 * V IN1 5V D1 1N4148 13k 10k 47.5k V SENSE1 CC1 10k 1% 4 FAULT FAULT ...
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U U APPLICATIO S I FOR ATIO Using the LTC1645 as a Linear Regulator This application uses the LTC1645 to Hot Swap one primary supply and generate a secondary low dropout regulated supply. Figure 19 shows how to switch a ...
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LTC1645 U U APPLICATIO S I FOR ATIO Switching Regulator Supply Sequencing Figure 21 shows the LTC1645 sequencing two power supplies, the lower of which is generated by the LTC1430A switching regulator. Connecting the regulator’s FB pin resistor divider (R1 ...
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U U APPLICATIO S I FOR ATIO W U LTC1645 1645fa 19 ...
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LTC1645 U U APPLICATIO S I FOR ATIO 1645fa ...
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U U APPLICATIO S I FOR ATIO ON 2V/DIV V REGIN 2V/DIV V REGOUT 2V/DIV V OUT2 2V/DIV V OUT1 2V/DIV RESET 5V/DIV Figure 24. Switching Regulator Hot Swap its FB or SENSE pin. In the case of the LTC1649, ...
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LTC1645 PACKAGE DESCRIPTIO .050 BSC .245 MIN .030 .005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 (0.254 – 0.508) .008 – .010 (0.203 – 0.254) NOTE: 1. DIMENSIONS IN 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT ...
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... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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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... Supply Tracking Mode 1.7V to 16.5V, Active Inrush Limiting, Fast Comparator www.linear.com V OUT1 3. 2.5A C 1N4002 LOAD1 D3 D2 MBR0530T1 1N4002 V OUT2 2.5V + 2.5A C LOAD2 10k 0.1 F 25V 1.18k 1% 1.37k 1% P RESET 1645 F15 LT/TP 0404 1K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 1645fa ...