EVALUATION KIT AVAILABLE MAX16050/MAX16051 Voltage Monitors/Sequencer Circuits with Reverse-Sequencing Capability General Description Features The MAX16050 monitors up to 5 voltages and sequences Monitor Up to 6 Voltages/Sequence Up to up to 4 voltages, while the MAX16051 monitors up to 6 5 Voltages (MAX16051) voltages and sequences up to 5 voltages. These devices Pin-Selectable Sequencing Order (MAX16050 Only) provide an adjustable delay as each supply is turned on Reverse-Sequencing Capability on Shutdown and they monitor each power-supply voltage, including Overvoltage Monitoring with Independent Output the input voltage V . When all of the voltages reach CC their final values and the reset delay timer expires, a 1.5% Threshold Accuracy power-on-reset (RESET) output deasserts allowing the 2.7V to 16V Operating Voltage Range microcontroller (C) to operate. If any voltage falls below Charge Pump to Fully Enhance External its threshold, the reset output asserts and all voltage n-Channel FETs supplies are turned off. The MAX16050/MAX16051 can be daisy-chained to control a higher number of voltages Capacitor-Adjustable Sequencing Delay in a system. Fixed or Capacitor-Adjustable Reset Timeout During a power-down event, the MAX16050/MAX16051 Internal 85mA Pulldowns for Discharging can reverse sequence the outputs. In this situation, each Capacitive Loads Quickly voltage is turned off sequentially until it reaches a 250mV Daisy-Chaining Capability to Communicate level, at which point, the next supply is turned off. The Across Multiple Devices MAX16050/MAX16051 also provide internal pulldown circuitry that turns on during power-down, to help Small 4mm x 4mm, 28-Pin TQFN Package discharge large output capacitors. Ordering Information and Typical Operating Circuit appears The MAX16050/MAX16051 feature a charge-pump at end of data sheet. supply output that can be used as a pullup voltage for driving external n-channel MOSFETs and an overvoltage output that indicates when any of the monitored voltages exceeds its overvoltage threshold. The MAX16050 also provides three sequence control inputs for changing the sequence order, while the MAX16051 has a fixed sequence order. The MAX16050/MAX16051 are available in a 28-pin (4mm x 4mm) thin QFN package and are fully specified over the -40C to +85C extended operating temperature range. Applications Servers Telecom Equipment Workstations Storage Systems Networking Systems 19-1013 Rev 2 5/17MAX16050/MAX16051 Voltage Monitors/Sequencer Circuits with Reverse-Sequencing Capability Absolute Maximum Ratings (All voltages referenced to GND.) Continuous Power Dissipation (T = +70C) A V ........................................................................-0.3V to +30V 28-Pin (4mm x 4mm) Thin QFN (derate 28.6mW/C CC REM, OUT , DISC ..............................................-0.3V to +30V above +70C) .......................................................... 2285mW* RESET, SHDN, SET , FAULT, EN HOLD, EN, DELAY, Operating Temperature Range ........................... -40C to +85C OV OUT, ABP, TIMEOUT, SEQ ........................-0.3V to +6V Junction Temperature ......................................................+150C CP OUT ...................................................... -0.3V to (V + 6V) Storage Temperature Range ............................ -65C to +150C CC RESET Current ..................................................................50mA Lead Temperature (soldering, 10s) .................................+300C DISC Current ..................................................................180mA Soldering Temperature (reflow) .......................................+260C Input/Output Current (all other pins)...................................20mA *As per JEDEC51 Standard (Multilayer Board). 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 = 2.7V to 16V, V = V , T = T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) CC EN ABP A J A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Voltage on V to ensure the device is CC Operating Voltage Range V 2.7 16 V CC fully operational V = V = V = low, voltage DISC OUT RESET V 1.1 V Reset Voltage (Note 2) CCR on V falling CC I = 1mA (external sourcing current ABP Regulated Supply Voltage V 2.45 2.90 V ABP from ABP) Undervoltage Lockout V Minimum voltage on ABP, ABP rising 2.1 2.3 V UVLO Undervoltage Lockout Hysteresis V ABP falling 100 mV UVLO HYS Supply Current ICC V = 3.3V, all OUT = high, no load 0.7 1.4 mA CC MONITORED ANALOG INPUTS SET Threshold V SET falling 0.492 0.5 0.508 V TH SET Threshold Hysteresis V SET rising 0.5 %V TH HYS TH SET1SET4 Input Current I V = 0.5V -100 +100 nA SET SET SET5 Input Current I V = 0.5V (MAX16051 only) -100 +100 nA SET5 SET5 SET Threshold Tempco V 30 ppm/C TH/ TC Overvoltage Threshold V SET rising 0.541 0.55 0.558 V TH OV Overvoltage Threshold SET falling 0.5 %V TH OV Hysteresis EN Threshold V EN falling 0.492 0.5 0.508 V TH EN EN Threshold Hysteresis V EN rising 0.5 %V EN HYS TH EN EN Pulse Width t EN falling 25 s ENLO PW EN to OUT Delay t EN falling 30 s ENLO OUT EN Input Current I V = 0.5V -100 +100 nA EN EN Maxim Integrated 2 www.maximintegrated.com