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MAX6460UT-T Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6460UT-T Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 15 page General Description The MAX6457–MAX6460 high supply voltage, low-power voltage monitors operate over a 4V to 28V supply voltage range. Each device includes a precision bandgap refer- ence, one or two low-offset voltage comparators, internal threshold hysteresis, power-good or reset timeout options, and one or two high-voltage open-drain outputs. Two external resistors (three for window detection) set the trip threshold voltages. The MAX6457 is a single voltage monitor for undervoltage or overvoltage detection. A logic-based clear input either latches the output for overvoltage applications or allows the device to operate in transparent mode. The MAX6458 includes two comparators (one overvoltage and one undervoltage) for window detection and a single output to indicate if the monitored input is within an adjustable volt- age window. The MAX6459 includes dual overvoltage/ undervoltage comparators with two independent com- parator outputs. Use the MAX6459 as a window com- parator with separate undervoltage and overvoltage outputs or as two independent, single voltage monitors. The MAX6460 includes a single comparator and an inter- nal reference, and can also accept an external reference. The inverting and noninverting inputs of the comparator are externally accessible to support positive or negative voltage monitors and to configure the device for active- high or active-low output logic. The MAX6457/MAX6458 offer fixed timing options as a voltage detector with a 50µs typical delay or as a reset cir- cuit with a 90ms minimum reset timeout delay. The moni- tored input must be above the adjusted trip threshold (or within the adjusted voltage window for the MAX6458) for the selected timeout period before the output changes state. The MAX6459/MAX6460 offer only a fixed 50µs timeout period. Internal threshold hysteresis options (0.5%, 5%, and 8.3% for the MAX6457/MAX6458/MAX6459, and 0.5% for the MAX6460) reduce output chatter in noise- sensitive applications. Each device is available in a small SOT23 package and specified over the extended temper- ature range of -40°C to +125°C. Applications Undervoltage Monitoring/Shutdown Overvoltage Monitoring/Protection Window Voltage Detection Circuitry Multicell Battery-Stack Powered Equipment Notebooks, eBooks Automotive Industrial Telecom Networking Features o Wide Supply Voltage Range, 4V to 28V o Internal 2.25V ±2.5% Reference o Low Current (3.5µA, typ at 12V) o Open-Drain n-Channel Output (28V Compliant) o Internal Threshold Hysteresis Options (0.5%, 5%, 8.3%) o Two IN-to-OUT Timeout Period Options (50µs, 150ms) o Internal Undervoltage Lockout o Immune to Short Voltage Transients o Small SOT23 Packages o Few External Components o Fully Specified from -40°C to +125°C High-Voltage, Low-Current Voltage Monitors in SOT Packages Ordering Information 5-CELL Li+ BATTERY STACK BATTERY CHARGER DC-DC CONVERTER LOAD R1 R2 RPULLUP SHDN +21V (NOMINAL) VCC GND CLEAR IN+ OUT MAX6457 IN OUT Typical Operating Circuit 19-2534; Rev 5; 7/12 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Pin Configurations appear at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX6457UKD_ _-T -40°C to +125°C 5 SOT23 MAX6458UKD_ _-T -40°C to +125°C 5 SOT23 MAX6459UT_-T -40°C to +125°C 6 SOT23 MAX6460UT-T -40°C to +125°C 6 SOT23 Note: The MAX6457/MAX6458/MAX6459 are available with factory-trimmed internal hysteresis options. The MAX6457 and MAX6458 offer two fixed timing options. Select the desired hys- teresis and timing options using Table 1 or the Selector Guide at the end of the data sheet, and enter the corresponding letters and numbers in the part number by replacing “_ _” or “_”. These devices are offered in tape-and-reel only and must be ordered in 2500-piece increments. Devices are available in both leaded and lead(Pb)-free/RoHS- compliant packaging. Specify lead(Pb)-free by replacing “-T” with “+T” when ordering. |
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