MAX6457MAX6460 High-Voltage, Low-Current Voltage Monitors in SOT Packages General Description Features The MAX6457MAX6460 high supply voltage, low-power Wide Supply Voltage Range, 4V to 28V voltage monitors operate over a 4V to 28V supply voltage Internal 2.25V 2.5% Reference range. Each device includes a precision bandgap refer- Low Current (3.5A, typ at 12V) ence, one or two low-offset voltage comparators, internal Open-Drain n-Channel Output (28V Compliant) threshold hysteresis, power-good or reset timeout options, and one or two high-voltage open-drain outputs. Internal Threshold Hysteresis Options Two external resistors (three for window detection) set the (0.5%, 5%, 8.3%) trip threshold voltages. Two IN-to-OUT Timeout Period Options (50s, 150ms) The MAX6457 is a single voltage monitor for undervoltage or overvoltage detection. A logic-based clear input either Internal Undervoltage Lockout latches the output for overvoltage applications or allows Immune to Short Voltage Transients the device to operate in transparent mode. The MAX6458 Small SOT23 Packages includes two comparators (one overvoltage and one undervoltage) for window detection and a single output to Few External Components indicate if the monitored input is within an adjustable volt- Fully Specified from -40C to +125C age window. The MAX6459 includes dual overvoltage/ undervoltage comparators with two independent com- Ordering Information parator outputs. Use the MAX6459 as a window com- PART TEMP RANGE PIN-PACKAGE parator with separate undervoltage and overvoltage outputs or as two independent, single voltage monitors. MAX6457UKD -T -40C to +125C 5 SOT23 The MAX6460 includes a single comparator and an inter- 5 SOT23 MAX6458UKD -T -40C to +125C nal reference, and can also accept an external reference. 6 SOT23 MAX6459UT -T -40C to +125C The inverting and noninverting inputs of the comparator are externally accessible to support positive or negative 6 SOT23 MAX6459UT /V+ -40C to +125C voltage monitors and to configure the device for active- 6 SOT23 MAX6460UT-T -40C to +125C high or active-low output logic. Note: The MAX6457/MAX6458/MAX6459 are available with The MAX6457/MAX6458 offer fixed timing options as a factory-trimmed internal hysteresis options. The MAX6457 and voltage detector with a 50s typical delay or as a reset cir- MAX6458 offer two fixed timing options. Select the desired hys- cuit with a 90ms minimum reset timeout delay. The moni- teresis and timing options using Table 1 or the Selector Guide at tored input must be above the adjusted trip threshold (or the end of the data sheet, and enter the corresponding letters within the adjusted voltage window for the MAX6458) for and numbers in the part number by replacing or . These the selected timeout period before the output changes devices are offered in tape-and-reel only and must be ordered in 2500-piece increments. state. The MAX6459/MAX6460 offer only a fixed 50s Devices are available in both leaded and lead(Pb)-free/RoHS- timeout period. Internal threshold hysteresis options (0.5%, compliant packaging. Specify lead(Pb)-free by replacing -T 5%, and 8.3% for the MAX6457/MAX6458/MAX6459, and with +T when ordering. 0.5% for the MAX6460) reduce output chatter in noise- /V denotes an automotive qualified part. sensitive applications. Each device is available in a small SOT23 package and specified over the extended temper- Pin Configurations appear at end of data sheet. ature range of -40C to +125C. Typical Operating Circuit Applications +21V (NOMINAL) Undervoltage Monitoring/Shutdown BATTERY IN DC-DC OUT CHARGER CONVERTER Overvoltage Monitoring/Protection SHDN V CC Window Voltage Detection Circuitry Multicell Battery-Stack Powered Equipment MAX6457 Notebooks, eBooks R1 R PULLUP LOAD 5-CELL Li+ Automotive IN+ OUT BATTERY STACK Industrial R2 Telecom GND CLEAR Networking For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-2048 Rev 6 12/12MAX6457MAX6460 High-Voltage, Low-Current Voltage Monitors in SOT Packages ABSOLUTE MAXIMUM RATINGS Junction Temperature......................................................+150C V , OUT, OUTA, OUTB, CLEAR to GND ..........-0.3V to +30.0V CC IN+, IN- to GND..........................................-0.3V to (V + 0.3V) Operating Temperature Range .........................-40C to +125C CC Storage Temperature Range .............................-65C to +150C REF to GND..............-0.3V to the lower of +6V and (V + 0.3V) CC Input Currents (V , IN+, IN-) ............................................20mA Lead Temperature (soldering, 10s) .................................+300C CC Soldering Temperature (reflow) Sink Current (OUT, OUTA, OUTB)......................................20mA Lead(Pb)-free................................................................+260C Continuous Power Dissipation (T = +70C) A 5-Pin SOT23 (derate 7.1 mW/C above +70C)............571mW Containing lead (Pb).....................................................+240C 6-Pin SOT23 (derate 8.7 mW/C above +70C)............696mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 4V to 28V, T = -40C to +125C, unless otherwise specified. Typical values are at T = +25C.) (Note 1) CC A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range V (Note 2) 4 28 V CC V = 5V, no load 2 5 CC Supply Current I V = 12V, no load 3.5 7.5 A CC CC V = 24V, no load 6.5 12.5 CC T = -40C to +85C, V 4V 1.195 1.228 1.255 A CC V IN V TH+ rising T = +85C to +125C, V 4V 1.170 1.255 A CC T = -40C to +85C 1.180 1.255 A MAX645 U D A T = +85C to +125C 1.155 1.255 A Threshold Voltage V T = -40C to +85C 1.133 1.194 V A IN V MAX645 U D B TH- falling T = +85C to +125C 1.111 1.194 A T = -40C to +85C 1.093 1.151 A MAX645 U D C T = +85C to +125C 1.071 1.151 A MAX64 U D A 0.5 Threshold Voltage Hysteresis MAX64 U D B 5 %V TH+ MAX64 U D C 8.3 IN Operating Voltage Range V (Note 2) 0 V V IN CC IN Leakage Current I V = 1.25V, V = +28V -55 +55 nA IN IN CC MAX645 UKD0 MAX6459UT 50 s MAX6460UT OUT Timeout Period t TP MAX6457 and MAX6458 only, 90 150 210 ms D3 option V rising from GND to V 4V in less than CC CC Startup Time 2ms 1s (Note 3) V 0.4 CLEAR Input Logic Voltage IL V (MAX6457) V 2 IH 2 Maxim Integrated