LTC2903 LINER [Linear Technology], LTC2903 Datasheet
LTC2903
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LTC2903 Summary of contents
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FEATURES 9 Selectable Supply Voltages ■ 12V, 5V, 3.3V, 2.5V, 1.8V 1.5V, 1.2V, 1V, +ADJ (0.5V) 3 Selectable Tolerances ■ –5%, –10%, –15% (LTC2917) Manual Reset Input (LTC2918) ■ 1.5V to 5.5V Supply Operation ■ ■ Adjustable Watchdog Timeout Windowed ...
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LTC2917/LTC2918 ABSOLUTE MAXIMUM RATINGS (Note 1, 2) Terminal Voltages V (Note 3) .......................................... –0.3V to 5.7V CC SEL1, SEL2, TOL, WDI, ⎯ M ⎯ ⎯ R ⎯ S ⎯ T ......... –0.3V to 7.5V VM ......................................................... –0.3V to ...
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ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC2917CMS-B1#PBF LTC2917CMS-B1#TRPBF LTC2917IMS-B1#PBF LTC2917IMS-B1#TRPBF LTC2917HMS-B1#PBF LTC2917HMS-B1#TRPBF LTC2917CMS-A1#PBF LTC2917CMS-A1#TRPBF LTC2917IMS-A1#PBF LTC2917IMS-A1#TRPBF LTC2917HMS-A1#PBF LTC2917HMS-A1#TRPBF LTC2918CMS-B1#PBF LTC2918CMS-B1#TRPBF LTC2918IMS-B1#PBF LTC2918IMS-B1#TRPBF LTC2918HMS-B1#PBF LTC2918HMS-B1#TRPBF LTC2918CMS-A1#PBF LTC2918CMS-A1#TRPBF LTC2918IMS-A1#PBF LTC2918IMS-A1#TRPBF LTC2918HMS-A1#PBF LTC2918HMS-A1#TRPBF TAPE AND REEL (MINI) TAPE AND REEL LTC2917CDDB-B1#TRMPBF ...
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LTC2917/LTC2918 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER V Minimum Supply Voltage CC(MIN) V Supply Undervoltage Lockout CC(UVLO) V Shunt Regulation Voltage CC(SHUNT Pin Current CC CC Monitor Input (VM) V 12V, 5% ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Reset Output ( ⎯ R ⎯ S ⎯ Internal Reset Timeout Period RST(INT) t Adjustable Reset Timeout Period RST(EXT) VM Undervoltage Detect to ⎯ R ...
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LTC2917/LTC2918 TYPICAL PERFORMANCE CHARACTERISTICS Threshold Voltage vs Temperature 1.5 1.0 0.5 V MTADJ 0 –0.5 V MT120 V MT25 –1.0 –1.5 –50 – 100 TEMPERATURE (˚C) 29178 G01 Reset Timeout Period vs RT Capacitance 10000 1000 ...
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TYPICAL PERFORMANCE CHARACTERISTICS ⎯ R ⎯ S ⎯ T Output Voltage 10k PULL- SEL1 = SEL2 = TOL = 0. ...
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LTC2917/LTC2918 BLOCK DIAGRAM SEL1 SEL2 3 STATE DECODE MONITOR VM DIVIDER MATRIX REFERENCE DIVIDER MATRIX + 0.5V – TIMING DIAGRAM WDI RST WDI RST 8 LTC2917 LTC2918 TOL 100k INTERNAL 200ms TIMER – + ADJUSTABLE RESET ...
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APPLICATIONS INFORMATION Supply Monitoring The LTC2917/LTC2918 are low voltage single supply monitors with selectable thresholds. Two three-state inputs select one of nine internally programmed thresholds. For the LTC2917, a third three-state input selects the tolerance at which the supply connected ...
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LTC2917/LTC2918 APPLICATIONS INFORMATION Threshold Accuracy The trip threshold for the supplies monitored is selected by confi guring the three-state input pins. When using the adjustable input, a external resistive divider sets the trip threshold, allowing the user complete control over ...
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APPLICATIONS INFORMATION The reference input of the comparator is controlled by the tolerance pin. The external resistive divider should make the voltage 0.5V when the supply is at nominal value. The actual threshold of VM accounts for ...
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LTC2917/LTC2918 APPLICATIONS INFORMATION LTC2917-B/LTC2918-B For applications in which reliability is even more critical, the LTC2917-B/LTC2918-B implements a windowed watch- dog function by adding a lower boundary condition to the standard watchdog function. If the WDI input receives a falling edge ...
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TYPICAL APPLICATIONS 1V Supply Monitor with Windowed Watchdog Timeout and Internal Timers Selected 3. BYPASS 0.1μF 10k V CC LTC2917 RST SEL1 WDI SEL2 TOL GND WT RT 3.3V 1.8V 12V Supply Monitor with 20ms Reset ...
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LTC2917/LTC2918 TYPICAL APPLICATIONS 3.3V, –10% Tolerance Supply Monitor with Disabled Watchdog 3.3V C BYPASS 0.1μ LTC2917 VM RST SEL1 WDI SEL2 TOL GND 1.5V Supply Monitor with Tolerance Control for Margining, 14 1.8V, –5% ...
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PACKAGE DESCRIPTION 0.889 ± 0.127 (.035 ± .005) 5.23 3.20 – 3.45 (.206) (.126 – .136) MIN 0.305 ± 0.038 0.50 (.0120 ± .0015) (.0197) BSC TYP RECOMMENDED SOLDER PAD LAYOUT 0.64 ±0.05 (2 SIDES) 0.70 ±0.05 2.55 ±0.05 1.15 ...
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