LTC2962/LTC2963/LTC2964 0.5% Accurate Quad Configurable Supervisor FEATURES DESCRIPTION n Simultaneously Monitor Four Power Supplies The LTC 2962 series of configurable power supply moni- n 0.5% Threshold Accuracy Over Temperature tors can supervise systems with up to four supply volt- n Selectable 4% and 6% Thresholds per Supply: ages. One of 16 preset or adjustable voltage monitor 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1V and ADJ thresholds per channel can be selected using external 1% n Adjustable Reset (RST) Timeout resistors connected to the programming (PG) inputs. The n Overvoltage and Negative Voltage Monitoring preset voltage thresholds are accurate to 0.5% over tem- n Push-Pull or Open-Drain RST Output perature. Positive (+ADJ) and negative (ADJ) adjustable n Margin Pin RDIS for Reset Disable inputs with a 0.5V threshold allow undervoltage, negative n H-Grade Temperature Range voltage and overvoltage monitoring. n LTC2963 The watchdog (LTC2963 only) and reset timeout periods Non-Windowed (1) Watchdog are adjustable using external capacitors. Accurate volt- Adjustable Watchdog Timer age thresholds and comparator glitch immunity ensure Watchdog Status Output WDO reliable reset operation without false triggering. The RST Selectable Initial Watchdog Timeout output is guaranteed to be in the correct state for V CC n LTC2964 input voltage down to 1V. Individual Comparator Open-drain Outputs n The flexibility of the LTC2962 family provides the ability 16-Lead 3mm 3mm QFN (LTC2962) n to monitor a wide variety of power supply combinations, 20-Lead 3mm 4mm QFN (LTC2963, LTC2964) including multiple supplies of the same voltage, with 0.5% accuracy. APPLICATIONS All registered trademarks and trademarks are the property of their respective owners. Protected n High Reliability Systems by U.S. patents including 6967591, 7239251, 7119714. n Network, Telecom and Server Systems n Automotive Control Systems TYPICAL APPLICATION 3.3V 3.3V Typical Distribution of Monitor 2.5V 2.5V Threshold Error 1.8V 1.8V 50 1.5V 1.5V 494 PARTS ( 31616 TRESHOLDS ) DC/DC 45 0.1F 0.1F 40 V V1 V2 V3 V4 DV CC CC 35 REF SYSTEM R5 LOGIC 30 30.1k RST 25 PG1 R4 RDIS 20 20k LTC2962 PG2 15 0 TO 5 R3 1% CONFIGURATION 56ms RESET TIMEOUT 10 20k RESISTORS PG3 5 R2 MR 20k 0 MANUAL PG4 0.2 0.15 0.1 0.05 0 0.05 0.1 0.15 0.2 RESET R1 GND RT THRESHOLD ERROR (%) 60.4k 296234 TA01b C RT 47nF 296234 TA01a Rev 0 1 Document Feedback For more information www.analog.com PERCENTAGE OF THRESHOLDS (%)LTC2962/LTC2963/LTC2964 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) V1 - V4, MR, RDIS, WDI, DV , V ............ 0.3V to 6V RST, WDO, OUT1 - OUT4 Currents ....................... 10mA CC CC PG1 - PG4, REF ......................................... 0.3V to 1.5V Operating Temperature Range OUT1 - OUT4 ................................................ 0.3V to 6V C-Grade ................................................... 0C to 70C RT, WT, WDS ................................0.3V to (V + 0.3V) I-Grade.................................................40C to 85C CC RST, WDO (DV 1.6V) ........... 0.3V to (DV + 0.3V) H-Grade ............................................. 40C to 125C CC CC RST, WDO (DV = GND) ............................. 0.3V to 6V Storage Temperature Range ......................65 to 150C CC Reference Load Current (I ) ............................... 1mA REF PIN CONFIGURATION LTC2962 LTC2963 LTC2964 TOP VIEW TOP VIEW TOP VIEW 20 19 18 17 20 19 18 17 RDIS 1 16 REF RDIS 1 16 REF 16 15 14 13 MR 2 15 PG1 MR 2 15 PG1 RDIS 1 12 REF DV 3 14 PG2 DV 3 14 PG2 MR 2 11 PG1 CC CC 21 21 17 V 4 13 PG3 V 4 13 PG3 DV PG2 CC 3 10 CC CC RST PG4 RST 5 12 PG4 5 12 V 4 9 PG3 CC GND 6 11 RT GND 6 11 RT 5 6 7 8 7 8 9 10 7 8 9 10 UD PACKAGE 16-LEAD (3mm 3mm) PLASTIC QFN UDC PACKAGE UDC PACKAGE T = 125C, = 68C/W, = 7.5C/W JMAX JA JC 20-LEAD (3mm 4mm) PLASTIC QFN 20-LEAD (3mm 4mm) PLASTIC QFN EXPOSED PAD (PIN 17) PCB GND CONNECTION OPTIONAL T = 125C, = 52C/W, = 6.8C/W T = 125C, = 52C/W, = 6.8C/W JMAX JA JC JMAX JA JC EXPOSED PAD (PIN 21) PCB GND CONNECTION OPTIONAL EXPOSED PAD (PIN 21) PCB GND CONNECTION OPTIONAL ORDER INFORMATION TUBE TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2962CUD PBF LTC2962CUD TRPBF LGZZ 16-Lead (3mm 3mm) Plastic QFN 0C to 70C LTC2962IUD PBF LTC2962IUD TRPBF LGZZ 16-Lead (3mm 3mm) Plastic QFN 40C to 85C LTC2962HUD PBF LTC2962HUD TRPBF LGZZ 16-Lead (3mm 3mm) Plastic QFN 40C to 125C LTC2963CUDC-1 PBF LTC2963CUDC-1 TRPBF LHBC 20-Lead (3mm 4mm) Plastic QFN 0C to 70C LTC2963IUDC-1 PBF LTC2963IUDC-1 TRPBF LHBC 20-Lead (3mm 4mm) Plastic QFN 40C to 85C LTC2963HUDC-1 PBF LTC2963HUDC-1 TRPBF LHBC 20-Lead (3mm 4mm) Plastic QFN 40C to 125C LTC2964CUDC PBF LTC2964CUDC TRPBF LHBB 20-Lead (3mm 4mm) Plastic QFN 0C to 70C LTC2964IUDC PBF LTC2964IUDC TRPBF LHBB 20-Lead (3mm 4mm) Plastic QFN 40C to 85C LTC2964HUDC PBF LTC2964HUDC TRPBF LHBB 20-Lead (3mm 4mm) Plastic QFN 40C to 125C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev 0 2 For more information www.analog.com RST V1 GND V2 RT V3 PG4 V4 WD0 V1 WDI V2 WDS V3 WT V4 OUT1 V1 OUT2 V2 OUT3 V3 OUT4 V4