Contact Monitor and Level MAX13037/MAX13038 Shifters with LDO Regulator General Description Features The MAX13037/MAX13038 contact monitor and level +6V to +26V Operating Voltage Range shifters monitor and debounce eight remote mechanical +42V Compatibility on BAT switches and assert an interrupt (INT) if a switch Switch Inputs Withstand Reverse Battery changes state. The state of each switch is sampled 150mA LDO, +5V (MAX13037) or +3.3V (MAX13038) through an SPI interface by reading the status register. Any switch can be prohibited from asserting an interrupt Ultra-Low Operating Current 28A (typ) in 64ms by writing to the command register. Four of the switch Scan Mode with LDO ON inputs are intended for ground-connected switches Resistor Adjustable Switching Hysteresis (IN0IN3) and the other four inputs (IN4IN7) are pro- Watchdog and Reset grammable in groups of two for either ground-connect- Built-In Switch Debouncing ed or battery-connected switches. Two switch inputs (IN0, IN1) have direct level-shifted outputs (DO0, DO1) Interrupt Output to be used for PWM or other timing-based signals. Immunity to Transients Switch input thresholds are set to 50% of the voltage High Modularity applied to BATREF. The threshold hysteresis is set by Thermal Protection connecting an external resistor from HYST to ground. 8kV HBM ESD Protection on IN0IN7 Without The MAX13037/MAX13038 supply an adjustable wet- External Components ting current to each closed switch to clean mechanical switch contacts that are exposed to adverse condi- Two Inputs (IN0, IN1) Programmable as Direct tions. Outputs The MAX13037/MAX13038 feature a low dropout (LDO) Four Inputs (IN4IN7) Programmable for BAT or linear regulator capable of supplying up to 150mA of GND Related Switches current. The MAX13037 LDO has an output voltage of +5V, whereas the MAX13038 has an output voltage of +3.3V. The MAX13037/MAX13038 also feature a watch- dog timer and an open-drain reset output with adjustable timing. Ordering Information The MAX13037/MAX13038 operate with a +6V to +26V LDO battery voltage applied to BAT. The MAX13037/ TEMP PIN- PART OUTPUT MAX13038 are available in a 6mm x 6mm, 36-pin TQFN RANGE PACKAGE VOLTAGE package and operate over the automotive -40C to -40C to 36 TQFN-EP* +125C temperature range. MAX13037ATX+ +5V +125C (6mm x 6mm) Applications -40C to 36 TQFN-EP* MAX13038ATX+ +3.3V +125C (6mm x 6mm) Body Computers +Denotes a lead(Pb)-free/RoHS-compliant package package. Window Lifters *EP = Exposed pad. Seat Movers Electric Sunroofs Other Control ECUs Pin Configuration and Typical Application Circuit appear at end of data sheet. 19-1084 Rev 1 5/15Contact Monitor and Level MAX13037/MAX13038 Shifters with LDO Regulator Absolute Maximum Ratings (All voltages referenced to GND, unless otherwise noted.) V ........................................................................-0.3V to +6.0V Continuous Current (CS, CLK, SDI, SDO, WDI, DO0, LO BAT.........................................................................-0.3V to +42V DO1, REGOFF).............................................................20mA IN , BATREF...........................................................-45V to +45V Continuous Power Dissipation (T = +70C) A IN to BAT ...............................................................-45V to +45V 36-Pin TQFN (derate 35.7mW/C above +70C) .......2857mW SD, REGON............................................................-0.3V to +45V Operating Temperature Range .........................-40C to +125C HYST, WET, TD, TDEB, THRESH, OT, INT, RST......-0.3V to 6.0V Junction Temperature......................................................+150C CS, CLK, SDI, SDO, WDI, Storage Temperature Range .............................-65C to +150C DO0, DO1, REGOFF.......................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C LO Package Thermal Characteristics (Note 1) TQFN Junction-to-Ambient Thermal Resistance ( ) ...........28C/W Junction-to-Case Thermal Resistance ( ) ...................1.4C/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer board. For detailed information on package thermal considerations see www.maximintegrated.com/thermal-tutorial. 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 (BAT = +6V to +26V, T = -40C to +125C, unless otherwise noted. Typical values are at BAT = +14V, T = +25C.) (Note 2) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY BAT Supply Range V 626V BAT V = +14V, continuous scan (SC2 = 1, BAT SC1 = 1, SC0 = 0), programmable BAT Supply Current with I hysteresis off (M0 = M1 = 1), 57 110 A SUP REG Regulator On IN0IN7 = unconnected, regulator on (REGON = REGOFF = GND). V = +14V, continuous scan (SC2 = 1, BAT SC1 = 1, SC0 = 0), programmable BAT Supply Current with I hysteresis off (M0 = M1 = 1), 46 80 A SUP Regulator Off IN0IN7 = unconnected, regulator off (REGON = BAT, REGOFF = GND). V = +14V, scan mode (SC0 = 0, BAT BAT Supply Current in Scan I SC1 = 0, SC2 = 0), regulator on 28 48 A SCAN REG Mode with Regulator On (REGON = REGOFF = GND). V = +14V, scan mode (SC0 = 0, BAT BAT Supply Current in Scan I SC1 = 0, SC2 = 0), regulator off 17 35 A SCAN Mode with Regulator Off (REGON = BAT, REGOFF = GND). T = +25C 3 5 BAT Supply Current in Shutdown V = 0V, V = +14V, A SD BAT I A SHDN Mode REGON = BAT T = +125C 4 7 A BATREF Input Resistance R V = +14V 1 2.7 M BATREF BATREF BATREF Input Leakage Current in I V = 0V, V = +14V 1 A L BATREF SD BATREF Shutdown www.maximintegrated.com Maxim Integrated 2