LTC2931CF#PBF Linear Technology, LTC2931CF#PBF Datasheet
LTC2931CF#PBF
Specifications of LTC2931CF#PBF
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LTC2931CF#PBF Summary of contents
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... The 52μA supply current makes the LTC2931 ideal for power conscious systems and it may be confi gured to monitor fewer than six inputs. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6967591, 7239251, 7119714. ...
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... LTC2931H .......................................... –40°C to 125°C Storage Temperature Range ................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC2931CF#PBF LTC2931CF#TRPBF LTC2931IF#PBF LTC2931IF#TRPBF LTC2931HF#PBF LTC2931HF#TRPBF Consult LTC Marketing for information on non-standard lead based fi nish parts. ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER V Reference Voltage REF V Mode Selection Voltage Range PG I VPG Input Current VPG I V1 Input Current Input Current Input ...
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LTC2931 TIMING DIAGRAMS RST COMP t RST RST WDI WDO 4 V Monitor Timing RST Watchdog Timing < t RST 2931 ...
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TYPICAL PERFORMANCE CHARACTERISTICS Normalized Threshold Voltages vs Temperature 1.015 1.010 1.005 1.000 0.995 0.990 0.985 –50 – 100 TEMPERATURE (°C) 2931 G01 Supply Current vs Temperature 3. 2.5V ...
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LTC2931 TYPICAL PERFORMANCE CHARACTERISTICS Reset Timeout Period vs Temperature 1500pF RT (SILVER MICA –50 – 100 TEMPERATURE ( C) 2931 G10 I vs Supply Voltage SINK (RST, WDO, COMP ...
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PIN FUNCTIONS COMP5 (Pin 1): Comparator Output 5. Real-time logic output with weak 6μA pull-up to V2. Pulls high when V5 is above reset threshold. May be pulled greater than V2 using external pull-up. Leave open if unused. V5 (Pin ...
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LTC2931 PIN FUNCTIONS COMP2 (Pin 18): Comparator Output 2. Real-time logic output with weak 6μA pull-up to V2. Pulls high when V2 is above its reset threshold. May be pulled greater than V2 using external pull-up. Leave open if unused. ...
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APPLICATIONS INFORMATION Supply Monitoring The LTC2931 is a low power, high accuracy confi gurable six supply monitoring circuit with six real-time monitor outputs, a common reset output and a watchdog timer. External capacitors set the reset and watchdog timeout periods. ...
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LTC2931 APPLICATIONS INFORMATION Table 1. Voltage Threshold Modes* MODE V1 (V) V2 (V) V3 (V) V4 (V) R1 (kΩ) R2 (kΩ) 0 5.0 3.3 ADJ ADJ 1 5.0 3.3 ADJ –ADJ 2 3.3 2.5 ADJ ADJ 3 3.3 2.5 ADJ ...
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APPLICATIONS INFORMATION the negative voltage being sensed and the VREF pin, is connected to the high impedance adjustable input (V4). V provides the necessary level shift required to operate REF at ground. The negative trip voltage is calculated from: R3 ...
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LTC2931 APPLICATIONS INFORMATION Supply and Temperature Monitor Figure 5 illustrates how to confi gure the LTC2931 to monitor temperature. Temperature is sensed by a thermistor, RNTC, as part of a voltage divider driving adjustable input V6. Output COMP6 goes low ...
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APPLICATIONS INFORMATION 12V (9.6V THRESHOLD) LTM4600 OUT LT3028 RUN V IN SHDN 10k LT3028 LTC2950-1 SHDN 10k INT KILL LTC3704 V IN RUN/UVLO 10k LT3028 V IN SHDN 10k 10k ...
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LTC2931 APPLICATIONS INFORMATION 2V/DIV Figure 7. Five Supply Power-Up Sequencing (Based on Circuit in Figure 6) 14 10ms/DIV PB 5V 3.3V 2.5V 1.8V –5.2V DONE RST 2931 FO7 2931fb ...
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... FLASH SHALL NOT EXCEED .254mm (.010") 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... QFN and SSOP Packages www.linear.com ● 10k POWER GOOD SYSTEM RESET LOGIC RST WDO 10 WDI t = 94ms 9.4ms RST 2931 TA02 Pin, Adjustable Threshold and Reset, CC Pin, Adjustable Reset Timer, H-Grade Temperature CC LT 0508 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 2931fb ...