LTC2912 Linear Technology, LTC2912 Datasheet
LTC2912
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LTC2912 Summary of contents
Page 1
... Three output confi gurations are available: the LTC2912- 1 has a latch control for the OV output; the LTC2912-2 has an OV and UV output disable feature for margining applications; the LTC2912-3 is identical to the LTC2912-1 but with a noninverting, OV output ...
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... Operating Temperature Range LTC2912C ................................................ 0°C to 70°C LTC2912I.............................................. –40°C to 85°C LTC2912H .......................................... –40°C to 125°C + 0.3V) CC Storage Temperature Range TSOT .................................................. –65°C to 125°C DFN .................................................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) TSOT ................................................................. 300° ...
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... Since the CC V pin has an internal 6.5V shunt regulator, a low impedance supply that CC exceeds 6V may exceed the rated terminal current. Operation from higher voltage supplies requires a series dropping resistor. See Applications Information. LTC2912 unless otherwise CC MIN TYP MAX UNITS ● ...
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... LTC2912 TIMING DIAGRAMS VH Monitor Timing V VH UOT t UOD Monitor Timing (TMR Pin Strapped UOT t UOD www.DataSheet4U.com UV 1V TYPICAL PERFORMANCE CHARACTERISTICS Input Threshold Voltage vs Temperature 0.505 0.504 0.503 0.502 0.501 0.500 0.499 0.498 0.497 0.496 0.495 –50 – TEMPERATURE (° ...
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... OV (Pin 6/Pin 3, LTC2912-1, LTC2912-2): Overvoltage Logic Output. Asserts low when the VL input voltage is above threshold. Latched low (LTC2912-1). Held low for programmed delay time after VL input is valid (LTC2912-2). Pin has a weak pull- using an external pull-up. Leave pin open if unused. LTC2912 ...
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... LTC2912 PIN FUNCTIONS (DFN/TSOT Packages) OV (Pin 6/Pin 3, LTC2912-3): Overvoltage Logic Output. Asserts high with a weak internal pull- input is above threshold. Latches high. May be pulled above V using an external pull-up. Leave pin open if CC unused. TMR (Pin 4/Pin 5): Reset Delay Timer. Attach an external ...
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... APPLICATIONS INFORMATION Voltage Monitoring The LTC2912 is a low power voltage monitoring circuit with an undervoltage and an overvoltage input. A timeout period that holds OV and UV asserted after a fault has cleared is adjustable using an external capacitor and may be externally disabled. When confi gured to monitor a posi- tive voltage V using the 3-resistor circuit confi ...
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... DC voltage causes spurious resets. To solve this problem without adding hysteresis, which causes a new error term in the trip voltage, the LTC2912 lowpass fi lters the output of the fi rst stage comparator at each input. This fi lter integrates the output of the comparator before as- serting the logic. A transient at the input of the comparator of suffi ...
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... VH input. Shunt Regulator The LTC2912 has an internal shunt regulator. The V operates as a direct supply input for voltages up to 6V. Under this condition, the quiescent current of the device remains below a maximum of 70μA. For V ...
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... A similar formula esti- latch as before. Disable (LTC2912-2) The LTC2912-2 allows disabling the UV and OV outputs via the DIS pin. Pulling DIS high forces both outputs to remain weakly pulled high, regardless of any faults that occur on the inputs. However UVLO condition oc- curs, UV asserts and pulls low, but the timeout function is bypassed ...
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... REF 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 LTC2912 R = 0.115 TYP TYP 2.00 ±0.10 (2 SIDES) 0.56 ± 0.05 (2 SIDES) 4 0.25 ± 0.05 0.75 ±0.05 2.15 ±0.05 (2 SIDES) 0 – ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● Single UV/OV Supply Monitor with 3.3V ±10% 12V POWER 3.3V SUPPLY 0.1μF 10k 27. LTC2912 4.53k LATCH GND TMR 22nF TIMEOUT = 200ms COMMENTS 4.65 Threshold 2.9V Threshold 4.65 Threshold 4.37V/4.62V Threshold 4.725V, 3.118V, 1V Threshold (±0.75%) ...