MAX6886 19-3587 Rev 1 1/12 Pin-Selectable, Hex Power-Supply Supervisory Circuit General Description Features The MAX6886 pin-selectable, multivoltage supply 32 Pin-Selectable Undervoltage Detector supervisor monitors six voltage-detector inputs and one Thresholds watchdog input, asserting a RESET when inputs drop Capacitor-Adjustable Reset and Watchdog below the selected voltage thresholds or the watchdog Timeout Periods timer expires. Manual reset and margin disable inputs offer additional flexibility. Factory Default Reset and Watchdog Timeout Five logic inputs select the MAX6886 thresholds. Logic Periods inputs select a supply tolerance (5% or 10%) and 1 of Margining Disable and Manual Reset Controls 32 factory-set threshold settings. Connect external capacitors or use the factory default setting to set the -40C to +85C Operating Temperature Range watchdog timeout periods and reset time delay. Small 5mm x 5mm 20-Pin Thin QFN Package The MAX6886 is available in a 20-pin TQFN (5mm x Few External Components 5mm x 0.8mm) package and operates over the extend- ed -40C to +85C temperature range. 1% Threshold Accuracy Applications Ordering Information Multivoltage Systems PART TEMP RANGE PIN-PACKAGE Telecom MAX6886ETP+ -40C to +85C 20 TQFN-EP* Networking +Denotes a lead(Pb)-free/RoHS-compliant package. Servers/Workstations/Storage Systems Pin Configuration appears at end of data sheet. Typical Operating Circuit 12V 12V DC-DC 5V 1 DC-DC 3.3V 2 DC-DC 2.5V 3 DC-DC 1.8V 4 1.5V 1.2V IN1 IN2 IN3 IN4 IN5 IN6 3.3V ALWAYS ON RESET RESET V CC LOGIC OUTPUT WDI P MARGIN DBP MAX6886 TH0 TH1 TH2 MR TH3 TH4 SRT SWT GND 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.Pin-Selectable, Hex Power-Supply Supervisory Circuit ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Maximum Junction Temperature .....................................+150C IN1IN6, V , RESET, SRT, SWT.............................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C CC TH0TH4, WDI, MR, MARGIN ..................................-0.3V to +6V Storage Temperature Range .............................-65C to +150C DBP ..........................................................................-0.3V to +3V Lead Temperature (soldering, 10s) .................................+300C Input/Output Current (all pins)..........................................20mA Continuous Power Dissipation (T = +70C) A 20-Pin 5mm x 5mm Thin QFN (derate 21.3mW/C above +70C).............................1702mW 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 V or V = 2.7V to 5.8V, WDI = GND, TH0TH4 = MARGIN = MR = DBP, T = -40C to +85C, unless otherwise noted. IN1 IN4 CC A Typical values are at T = +25C.) (Notes 1, 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range Voltage on either one of IN1IN4 or V to CC 2.7 5.8 V (Note 3) guarantee the part is fully operational Supply Current I V = 5.8V, IN2IN6 = GND, no load 0.9 1.2 mA CC IN1 Digital Bypass Voltage V 2.48 2.55 2.67 V DBP o o T = +25 C to +85 C -1 +1 A Threshold Accuracy (Table 2) V IN1IN6, V falling % V TH IN TH o o T = -40 C to +85 C -1.5 +1.5 A Threshold Hysteresis V 0.3 % V TH-HYS TH Threshold Tempco V /C 10 ppm/C TH For V < highest V and V < V IN IN1IN4 IN CC IN Input Impedance R (not ADJ), thresholds are not set as 130 200 300 k IN adjustable IN5, IN6 IN Input Leakage Current I -150 +150 nA IN IN1IN4 set as adjustable thresholds Power-Up Delay t V 2.5V 2.5 ms D-PO CC IN to RESET Delay t IN falling/rising, 100mV overdrive 20 s D-R Reset Default Timeout Period t V = V 180 200 220 ms RP SRT CC Reset Adjustable Timeout Period t C = 47nF 135 207 280 ms RP-ADJ SRT SRT Adjustable Timeout Current I V = V 180 230 280 nA SRT SRT GND V V , selects reset default SRT Default Timeout Threshold V SRT SRT-DEF 1.1 1.25 1.5 V SRT-DEF SRT Adjustable Timeout V (Note 4) 0.95 1.00 1.05 V SRT-ADJ Threshold SRT Adjustable Timeout V (Note 5) 100 mV SRT-DIS Discharge Threshold SRT Adjustable Timeout Output- I V = 0.3V 0.7 mA SRT-DIS SRT Low Discharge Current RESET Output Low V I = 4mA, output asserted 0.4 V OLRESET SINK RESET Output Open-Drain I Output tri-stated -1 +1 A LKG Leakage Current 2 MAX6886