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TPS3306-25 датащи(PDF) 2 Page - Texas Instruments |
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TPS3306-25 датащи(HTML) 2 Page - Texas Instruments |
2 / 13 page www.ti.com TPS3306-15 TPS3306-18, TPS3306-20 TPS3306-25, TPS3306-33 SLVS290A – APRIL 2000 – REVISED MAY 2004 The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following supply voltage monitoring table. SUPPLY VOLTAGE MONITORING NOMINAL SUPERVISED VOLTAGE THRESHOLD VOLTAGE (typ) DEVICE SENSE1 SENSE2 SENSE1 SENSE2 TPS3306-15 3.3 V 1.5 V 2.93 V 1.4 V TPS3306-18 3.3 V 1.8 V 2.93 V 1.68 V TPS3306-20 3.3 V 2 V 2.93 V 1.85 V TPS3306-25 3.3 V 2.5 V 2.93 V 2.25 V TPS3306-33 5 V 3.3 V 4.55 V 2.93 V During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT. An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again. The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply. The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog. The TPS3306-xx devices are available in either 8-pin MSOP or standard 8-pin SO packages, and are characterized for operation over a temperature range of -40 °C to 85°C. AVAILABLE OPTIONS PACKAGED DEVICES MARKING TA DGK PACKAGE SMALL OUTLINE (D) µ-SMALL OUTLINE (DGK) TPS3306-15D TPS3306-15DGK TIAIC TPS3306-18D TPS3306-18DGK TIAID -40 °C to 85°C TPS3306-20D TPS3306-20DGK TIAIE TPS3306-25D TPS3306-25DGK TIAIF TPS3306-33D TPS3306-33DGK TIAIG 2 |
Аналогичный номер детали - TPS3306-25 |
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Аналогичное описание - TPS3306-25 |
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