MAX6361MAX6364 19-1615 Rev 4 10/11 SOT23, Low-Power P Supervisory Circuits with Battery Backup General Description Features The MAX6361MAX6364 supervisory circuits reduce the Low +1.2V Operating Supply Voltage complexity and number of components required for (V or V ) CC BATT power-supply monitoring and battery control functions in Precision Monitoring of +5.0V, +3.3V, +3.0V, and microprocessor (P) systems. The circuits significantly +2.5V Power-Supply Voltages improve system reliability and accuracy compared to that Debounced Manual Reset Input (MAX6361) obtainable with separate ICs or discrete components. Watchdog Timer with 1.6s Timeout Period Their functions include P reset, backup battery (MAX6362) switchover, and power failure warning. Battery-On Output Indicator (MAX6363) The MAX6361MAX6364 operate from supply voltages as Auxiliary User-Adjustable RESET IN (MAX6364) low as +1.2V. The factory-preset reset threshold voltage Three Available Output Structures ranges from 2.32V to 4.63V (see Ordering Information). Push-Pull RESET, Open-Drain RESET, These devices provide a manual reset input (MAX6361), watchdog timer input (MAX6362), battery-on output Open-Drain RESET (MAX6363), and an auxiliary adjustable reset input RESET/RESET Valid Down to 1.2V Guaranteed (MAX6364). In addition, each part type is offered in three (V or V ) CC BATT reset output versions: an active-low open-drain reset, an Power-Supply Transient Immunity active-low open-drain reset, and an active-high open- 150ms (min) Reset Timeout Period drain reset (see Selector Guide at end of data sheet). Small 6-Pin SOT23 Package Ordering Information Applications PART TEMP RANGE PIN-PACKAGE MAX6361LUT -T -40C to +85C 6 SOT23 Computers Fax Machines MAX6361PUT -T -40C to +85C 6 SOT23 Controllers Industrial Control MAX6361HUT -T -40C to +85C 6 SOT23 Intelligent Instruments POS Equipment MAX6362LUT -T -40C to +85C 6 SOT23 Critical P/C Portable/Battery-Powered MAX6362PUT -T -40C to +85C 6 SOT23 Power Monitoring Equipment MAX6362HUT -T -40C to +85C 6 SOT23 MAX6363LUT -T -40C to +85C 6 SOT23 MAX6363PUT -T -40C to +85C 6 SOT23 MAX6363HUT -T -40C to +85C 6 SOT23 Pin Configurations MAX6364LUT -T -40C to +85C 6 SOT23 MAX6364PUT -T -40C to +85C 6 SOT23 TOP VIEW MAX6364HUT -T -40C to +85C 6 SOT23 Note: These parts offer a choice of reset threshold voltages. From the table below, select the suffix corresponding to the RESET, RESET16 BATT desired threshold voltage and insert it into the part number to complete it. When ordering from the factory, there is a 2500- MAX6361 piece minimum on the SOT package (tape-and-reel only). GND 2 5 OUT Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing- with+ when ordering. RESET THRESHOLD RANGES (V) MR34 V CC SUFFIX MIN TYP MAX 46 4.50 4.63 4.75 SOT23-6 44 4.25 4.38 4.50 Pin Configurations continued at end of data sheet. 31 3.00 3.08 3.15 29 2.85 2.93 3.00 Selector Guide appears at end of data sheet. 26 2.55 2.63 2.70 Typical Operating Circuit appears at end of data sheet. 23 2.25 2.32 2.38 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.SOT23, Low-Power P Supervisory Circuits with Battery Backup ABSOLUTE MAXIMUM RATINGS Terminal Voltages (with respect to GND) Output Current V , BATT, OUT.......................................................-0.3V to +6V OUT................................Short-Circuit Protection for up to 10s CC RESET (open drain), RESET (open drain)................-0.3V to +6V RESET, RESET, BATT ON ..............................................20mA BATT ON, RESET (push-pull), RESET IN, Continuous Power Dissipation (T = +70C) A 6-Pin SOT23 (derate 8.70mW/C above +70C) .........696mW WDI.......................................................-0.3V to (V + 0.3V) OUT Operating Temperature Range ...........................-40C to +85C MR .............................................................-0.3V to (V + 0.3V) CC Junction Temperature......................................................+150C Input Current Storage Temperature Range .............................-65C to +150C V Peak ............................................................................1A CC Lead Temperature (soldering, 10s) .................................+300C V Continuous ............................................................250mA CC Soldering Temperature (reflow) BATT Peak ....................................................................250mA Lead(Pb)-free...............................................................+260C BATT Continuous ............................................................40mA Packages containing lead(Pb).....................................+240C GND ................................................................................75mA 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 = +2.4V to +5.5V, V = 3V, T = -40C to +85C, reset not asserted. Typical values are at T = +25C, unless otherwise CC BATT A A noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range, V , CC No load (Note 2) 0 5.5 V V or V V CC BATT BATT V = 2.8V 10 30 CC No load, V > V , CC TH Supply Current I WDI = V or GND V = 3.6V 11 35 A CC CC CC (Excluding I ) OUT (MAX6362) V = 5.5V 15 50 CC T = +25C 1 I in Battery-Backup V = 2.8V, A SUPPLY BATT I A SUPPLY Mode (Excluding I ) V = 0V OUT CC T = -40C to +85C 3 A T = +25C -0.1 0.02 A 5.5V > V > CC BATT Standby Current I A BATT (V + 0.2V) BATT T = -40C to +85C -1.0 0.05 A V = 4.75V, I 150mA 2.75 CC OUT V to OUT On-Resistance R V = 3.15V, I 65mA 3.0 CC ON CC OUT V = 2.38V, I 25mA 4.6 CC OUT V = 4.5V, I 20mA V - 0.2 BATT OUT BATT V in Battery-Backup Mode V = 3.0V, I 10mA V - 0.15 V OUT BATT OUT BATT V = 2.25V, I 5mA V - 0.15 BATT OUT BATT Power-up 20 Battery-Switchover Threshold V < V mV CC TH (V - V ) CC BATT Power-down -20 MAX636 UT46 4.50 4.63 4.75 MAX636 UT44 4.25 4.38 4.50 MAX636 UT31 3.00 3.08 3.15 Reset Threshold V V TH MAX636 UT29 2.85 2.93 3.00 MAX636 UT26 2.55 2.63 2.70 MAX636 UT23 2.25 2.32 2.38 V Falling Reset Delay V falling at 10V/ms 35 s CC CC Reset-Active Timeout Period t 150 280 ms RP 2 MAX6361MAX6364