ltc2903-1 Linear Technology Corporation, ltc2903-1 Datasheet
ltc2903-1
Related parts for ltc2903-1
ltc2903-1 Summary of contents
Page 1
... Internal supply voltage (V voltage on the V1, V2 inputs. The RST output is guaranteed to sink at least 0.5V and will typically conduct current down to 0V. Quiescent current typical, making the LTC2903-1 ideal for power conscious systems. The LTC2903 Package available in a 6-lead low profile (1mm) SOT-23 package. ...
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... LTC2903-1 ABSOLUTE W MAXIMUM W W (Notes V1, V2 ...................................................... – 0.3V to 6.5V V3 ................................................. 2. (LTC2903-A1, LTC2903-B1) ................– 0.3V to 6.5V V4 (LTC2903-C1) .................................... – 6.5V to 0.3V RST ........................................................ – 0.3V to 6.5V Operating Temperature Range LTC2903C-X1 .......................................... LTC2903I-X1 ...................................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL CHARACTERISTICS ...
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... I = 2500 A CC RST Note 5: The RST output pin on the LTC2903-1 has an internal pull- typically 10 A. However, for faster rise times or for V greater than V2, use an external pull-up resistor. Note 6: At input voltages below and V2, voltage on V3 assists pulling down the RST output. ...
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... LTC2903-1 TYPICAL PERFOR A CE CHARACTERISTICS Threshold Voltage vs Temperature 4.500 4.475 4.450 4.425 4.400 4.375 4.350 – –25 TEMPERATURE ( C) 28031 G01 1.8V Threshold Voltage vs Temperature 1.625 1.615 1.605 1.595 1.585 1.575 1.565 –50 – TEMPERATURE ( C) 28031 G04 Supply Currents ...
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... V , INPUT SUPPLY VOLTAGE (V) IN RST Voltage Output Low vs RST Sink Current 1 1.2 –45 C 0.9 0.6 0 (mA) 29031 G16 LTC2903-1 RST Output Voltage with 10k Pull- 5 4.5 LTC2903B, C 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 100 0 0.5 1 1.5 2 2.5 3 3.5 V1 (V) 29301 G11 RST Current Sink Capability vs V ...
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... LTC2903-1 TYPICAL PERFOR A CE CHARACTERISTICS W U RST Pull-Up Current vs V2 –90 V1, V3, V4 ABOVE THRESHOLD –80 –70 –60 –50 –40 –30 –20 V RT25 – 0 CTIO (Pin 1): Voltage Input 1 (5V, 3.3V). Internal V generated from the greater voltage on the V1, V2 inputs. ...
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... BLOCK DIAGRA S W (LTC2903-A1 ADJ V4 5 GND 2 – V1 POWER DETECT V2 + – RESET DELAY GENERATOR + 200ms DELAY – V1 LOW VOLTAGE – + BANDGAP REFERENCE 2903 BD1 LTC2903 RST PULL-DOWN 29031f 7 ...
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... LTC2903-1 BLOCK DIAGRA S W (LTC2903- GND 2 8 – V1 POWER DETECT V2 + – RESET DELAY GENERATOR + 200ms DELAY – V1 LOW VOLTAGE – + BANDGAP REFERENCE 2903 BD2 RST PULL-DOWN 29031f ...
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... BLOCK DIAGRA S W (LTC2903- –5. GND 2 – V1 POWER DETECT V2 + – RESET DELAY GENERATOR + 200ms DELAY – V1 LOW VOLTAGE – BANDGAP REFERENCE 2903 BD3 LTC2903 RST PULL-DOWN 29031f 9 ...
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... APPLICATIO S I FOR ATIO U U Power-Up The LTC2903-1 issues a logic low on the RST output when an input supply voltage resides below the prescribed threshold voltage. Ideally, the RST logic output would remain low with the input supply voltage down to zero volts. Most supervisors lack pull-down capability below 1V ...
Page 11
... Such a perfectly accurate W U supervisor does not exist—the actual reset threshold may vary over a specified band ( 1.5% for the LTC2903-1 su- pervisors). Figure 4 shows the typical relative threshold accuracy for all four inputs, over temperature. With this variation of reset threshold in mind, the nominal reset threshold of the supervisor resides below the mini- mum supply voltage ...
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... The amount of added hysteresis, usually specified as a percentage of the trip threshold, effectively degrades the advertised accuracy of the part. To maintain high accuracy, the LTC2903-1 does not use hysteresis. To minimize spurious resets while maintaining threshold accuracy, the LTC2903-1 employs two forms of noise filtering ...
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... Fixed Quad Supply Monitor with LED Indication on RST Quad Supply Monitor with Adjustable Input 1 6 3.3V V1 RST C1 LTC2903-A1 R1 0.1 F 76. GND 100k 0 2. LED RST C1 LTC2903-B1 0 GND 3.3V V3 LTC2903-1 SYSTEM RESET 1V 1.8V 2903 TA02 SYSTEM RESET 1.8V 2.5V 2903 TA05 29031f 13 ...
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... LTC2903-1 TYPICAL APPLICATIO S U Quad Supply Monitor with Unused Input Pulled Above Threshold RST C1 LTC2903-C1 0 GND 2903 TA03 SYSTEM RESET –5.2V 29031f ...
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... U S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.95 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) LTC2903-1 2.90 BSC (NOTE 4) PIN ONE ID 0.30 – 0.45 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 15 29031f ...
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... LTC2903-1 TYPICAL APPLICATIO U 3.3V 2.5V *OPTIONAL RESISTOR RECOMMENDED TO EXTEND ESD TOLERANCE RELATED PARTS PART NUMBER DESCRIPTION LTC690 5V Supply Monitor, Watchdog Timer and Battery Backup LTC694-3.3 3.3V Supply Monitor, Watchdog Timer and Battery Backup LTC699 5V Supply Monitor and Watchdog Timer LTC1232 5V Supply Monitor, Watchdog Timer and Pushbutton Reset LTC1326 Micropower Precision Triple Supply Monitor for 5V, 3 ...