LTC1536 Linear Technology, LTC1536 Datasheet
LTC1536
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LTC1536 Summary of contents
Page 1
... For 3.3V and 5V supplies that are > 500mV below spec or for the condition when the 5V supply falls below the 3.3V supply, the LTC1536 has a very fast response time capable of meeting the PCI t threshold accuracy and glitch immunity ensure reliable ...
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... Soft Reset Pulse Width SRST t V Undervoltage Detect to RST Operating Temperature Range LTC1536C .............................................. LTC1536I ............................................ – Storage Temperature Range ................ – 150 C + 0.3V CC3 Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER V 1 CC3 V 2 CC5 LTC1536CMS8 ...
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... Below 2.5V (Note 5) V Drops Below V By 300mV CC5 CC3 (Note 6) Note 4: Conforms to PCI Local Bus Specification Rev 2.1, Sect. 4.3.2 for t Note 5: V CC3 V – 500mV to RST at 1.5V. RTX Note 6: V CC5 CC5 CC3 LTC1536 MIN TYP MAX 1.4 2.0 1.4 2.0 0. 0.05 CC5 = 1V ...
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... LTC1536 W U TYPICAL PERFORMANCE CHARACTERISTICS I vs Temperature VCC3 140 120 100 – 45 – 25 – TEMPERATURE ( C) 1536 G01 V Threshold Voltage CC5 vs Temperature 4.750 4.745 4.740 4.735 4.730 4.725 4.720 4.715 4.710 4.705 4.700 – – 40 – ...
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... CC 1536 G13 Power-Fail Response Time vs Temperature PCI SPEC V CC3 25 t SPEC FAIL MARGIN RST 1536 G15 LTC1536 V Typical Transient Duration CCA vs Reset Comparator Overdrive 40 RESET OCCURS ABOVE CURVE 0.001 0.01 0.1 – V (V) V RESET COMPARATOR OVERDRIVE, V CC5 ...
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... LTC1536 PIN FUNCTIONS V (Pin 1): 3.3V Sense Input and Power Supply Pin for CC3 the IC. Bypass to ground with 0.1 F ceramic capacitor. V (Pin 2): 5V Sense Input. Used as gate drive for RST CC5 output FET when the voltage on V CC5 voltage CC3 V (Pin 3): 1V Sense, High Impedance Input. Can be CCA used as a logic input with a 1V threshold ...
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... U APPLICATIONS INFORMATION Operation The LTC1536 is a low power, high accuracy triple supply monitoring circuit. This reset generator has two basic functions: generation of a reset when power supplies are out of range, and generation of a reset or “soft” reset when the reset button is pushed. The LTC1536 has the added ...
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... PCI specification, typical ( 2 sec), values for Power Detect/Gate Drive The LTC1536 for the most part is powered internally from the V pin. The exception is at the gate drive of the output CC3 FET on the RST pin. On the gate to this FET is power detect circuitry used to detect and drive the gate from either the 3 ...
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... LTC1536 PBR CC3 100k SRST CC5 RST CCA 4 5 GND RST SYSTEM RESET 1536 TA09 Tied to DC/DC Feedback Divider CCA 2.9V 35.7k LTC1536 3.3V V PBR CC3 SRST CC5 RST CCA 4 5 22.1k GND RST 1% SYSTEM RESET ...
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... LTC1536 PACKAGE DESCRIPTION 0.007 (0.18) * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) LTC1536 0.189 – 0.197 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) ...
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... A + 12V 1.05M – 102k OPTIONAL 1% PWR GOOD – – REF 1.221V 9 1536 TA07 100k LTC1536 PBR CC3 SRST CC5 3 6 SYSTEM V RST CCA RESET 4 5 GND RST COMMENTS 4.65V Threshold 2.9V Threshold 4.65V Threshold 4.37V/4.62V Threshold 4 ...