LTC2902-2IGN#TRPBF Linear Technology, LTC2902-2IGN#TRPBF Datasheet
LTC2902-2IGN#TRPBF
Specifications of LTC2902-2IGN#TRPBF
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LTC2902-2IGN#TRPBF Summary of contents
Page 1
... The LTC2902-1 features an open-drain RST output, while the LTC2902-2 has a push-pull RST output. The 43 A supply current makes the LTC2902 ideal for power conscious systems and the part may be configured to monitor less than four inputs. The LTC2902-1/LTC2902-2 are available in the 16-lead narrow SSOP package ...
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... LTC2902 ABSOLUTE AXI U RATI GS (Notes V1, V2, V3, V4, V ..................................... – 0. RST (LTC2902-1)........................................ – 0. RST (LTC2902-2).......................... – 0.3V to (V2 + 0.3V) COMPX, RDIS ............................................. – 0. T0, T1 .......................................... – 0. CRT ............................................. – 0. ............................................. – 0. REF Reference Load Current (I ) ............................ 1mA VREF V4 Input Current (– ADJ Mode) ............................ –1mA Operating Temperature Range LTC2902-1C/LTC2902-2C ....................... LTC2902-1I/LTC2902-2I .................... – ...
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... RDIS Note 5: The output pins RST and COMPX have internal pull-ups typically 6 A. However, external pull-up resistors may be used when faster rise times are required or for V Note 6: The push-pull RST output pin on the LTC2902-2 is actively pulled V2. LTC2902 MIN TYP MAX UNITS – ...
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... TEMPERATURE ( C) LTC2902-2 RST 2902 F03 Figure 3. Active Pull-Up RST V 1.5V 2902 TD 3V Threshold Voltage vs Temperature 2.850 5% 2.815 2.780 2.745 7.5% 2.710 2.675 10% 2.640 2.605 12.5% 2 ...
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... Temperature 2.5V 1 1.8V 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 – 60 100 –40 – TEMPERATURE ( C) LTC2902 1.5V Threshold Voltage vs Temperature 1.425 5% 1.405 1.385 7.5% 1.365 1.345 10% 1.325 1.305 12.5% 1.285 1.265 80 100 – 60 –40 – TEMPERATURE ( C) 2902 G05 ...
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... RESET COMPARATOR OVERDRIVE VOLTAGE (% OF V RTX 2902 G14 Reset Time-Out Period vs Capacitance 100m 10m 1m 100 10p 100p 1n 10n 80 100 C (FARAD) RT 2902 G16 RST High Level Output Voltage vs Output Source Current (LTC2902-2) 3.5 3.0 2.5 2.0 1 0.5 1 1.5 I (mA) SOURCE 2902 G19 100 ) RTX ...
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... Bypass this pin to ground with a 0.1 F (or greater) capacitor. CRT (Pin 5): Reset Delay Time Programming Pin. Attach an external capacitor (C of 4.6ms/nF. Leaving the pin open generates a minimum delay of approximately 47nF capacitor will gener- ate a 216ms reset delay time. LTC2902 V1, V2 V3, V4 100 ...
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... Bypass this pin to ground with a 0.1 F (or greater) capacitor. All logic outputs (COMP1, COMP2, COMP3, COMP4) are weakly pulled up to V2. RST is weakly pulled the LTC2902-1 and RST is actively pulled the LTC2902-2. COMP4 (Pin 15): Comparator Output 4. Nondelayed, active high logic output with weak pull-up to V2. Pulls high when V4 is above reset threshold ...
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... BLOCK DIAGRA RESISTIVE DIVIDER V3 MATRIX GND A/D 11 BUFFER V REF 12 BUFFER GAIN ADJUST – + – + – + – + BANDGAP REFERENCE ADJUSTABLE RESET PULSE GENERATOR CRT C RT LTC2902 V1 V2 POWER V CC DETECT LTC2902 RDIS LTC2902-2 V2 COMP1 2 COMP2 16 COMP3 1 COMP4 15 RST 6 RST 6 2902 DB-1 2902f 9 ...
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... Supply Monitoring The LTC2902 is a low power, high accuracy program- mable quad supply monitoring circuit with four nondelayed monitor outputs, a common reset output and selectable supply thresholds. Reset timing is adjustable using an external capacitor ...
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... If the bandgap reference becomes invalid (V < 2V typ), the part will reprogram once V CC above 2.4V (max). ( 1mA). REF Monitor Output Rise and Fall Time Estimation All of the outputs (RST, COMPX) have strong pull-down capability. If the external load capacitance (C LTC2902 ( TRIP 11.25 2150 9.4 1780 7 ...
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... Using a 10k pull- up resistor, the rise time is reduced to 3.3 s for a 150pF load capacitance. The LTC2902-2 has an active pull- the RST output. The typical performance curve (RST Pull-Up Cur- rent vs V2 curve) demonstrates that the pull-up current is somewhat linear versus the V2 voltage and R mated to be approximately 625 ...
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... Monitor with Unused V2, V3 Inputs Pulled Above Trip Thresholds (5% Tolerance COMP3 COMP2 2 15 COMP1 COMP4 LTC2902 CRT V REF 6 11 SYSTEM RST V PG RESET GND RDIS T1 LTC2902 R3 2.15M 1% 12V V = 11.25V TRIP R4 100k 1% 2902 TA02 R3 464k 1% – –4.64V TRIP R1 R4 16.2k 121k 86.6k 1% 2902 TA03 2902f 13 ...
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... LTC2902 U TYPICAL APPLICATIO Quad Supply Monitor with LED Undervoltage Indicators, 12.5% Tolerance, Reset Disabled 5V, 3.3V, 2.5V, 1. LED LED 1 16 COMP3 COMP2 2 15 COMP1 COMP4 LTC2902 CRT V REF 6 11 RST GND RDIS LED LED 3.3V 1.5V R1 53. 47.5k 1% 2902 TA04 2902f ...
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... TYP .015 .004 45 .053 – .068 (0.38 0.10) (1.351 – 1.727) 0 – 8 TYP .008 – .012 (0.203 – 0.305) LTC2902 .189 – .196* (4.801 – 4.978) .009 (0.229 REF .150 – .157** (3.810 – 3.988) 1 ...
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... Programmable Quad Supply Monitor LTC2901 Programmable Quad Supply Monitor Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 Quad Supply Monitor with Hysteresis 5% Tolerance (Supplies Rising) 12.5% Tolerance (After RST Goes High) 5V LTC2902 COMP1 COMP2 10k 3.3V ...