LTC2912 Single UV/OV Voltage Monitor FEATURES DESCRIPTION n Monitors Single Voltage The LTC 2912 voltage monitor is designed to detect power n Adjustable UV and OV Trip Values supply undervoltage and overvoltage events. The VL and n Guaranteed Threshold Accuracy: 1.5% VH monitor inputs include filtering to reject brief glitches, n Power Supply Glitch Immunity thereby ensuring reliable reset operation without false or n Adjustable Reset Timeout with Timeout Disable noisy triggering. An adjustable timer defines the duration n 29A Quiescent Current of the overvoltage and undervoltage reset outputs which n Open Drain OV and UV Outputs function independently. While the LTC2912 operates n Guaranteed OV and UV for V 1V directly from 2.3V to 6V supplies, an internal V shunt CC CC TM n Available in 8 Lead ThinSOT and (3mm 2mm) regulator coupled with low supply current demand allows DFN Packages operation from higher voltages such as 12V, 24V or 48V. Three output configurations are available: the LTC29121 has a latch control for the OV output the LTC2912 2 APPLICATIONS has an OV and UV output disable feature for margining n Desktop and Notebook Computers applications the LTC2912 3 is identical to the LTC2912 1 n Network Servers but with a noninverting, OV output. n Core, I/O Voltage Monitors The LTC2912 provides a precise, versatile, space conscious micropower solution for voltage monitoring. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Single OV/UV Supply Monitor, 3.3V 10% Tolerance Reset Time-Out Period vs Capacitance 10000 3.3V POWER SUPPLY 0.1F 1000 27.4k V CC SYSTEM VH OV 100 LTC2912-1 1k VL UV 4.53k 10 LATCH GND TMR 2912 TA01a 1 22nF 0.1 1 10 100 1000 TIMEOUT = 200ms TMR PIN CAPACITANCE, C (nF) TMR 2912 G08 2912fb 1 For more information www.linear.com/LTC2912 UV/OV TIMEOUT PERIOD, t (ms) UOTOLTC2912 ABSOLUTE MAXIMUM RATINGS (Note 1) Terminal Voltages Operating Temperature Range V (Note 3) ............................................. 0.3V to 6V LTC2912C ................................................ 0C to 70C CC OV, UV, OV ............................................. 0.3V to 16V LTC2912I .............................................40C to 85C TMR ..........................................0.3V to (V + 0.3V) LTC2912H .......................................... 40C to 125C CC VH, VL, LATCH, DIS ...............................0.3V to 7.5V Storage Temperature Range Terminal Currents TSOT .................................................. 65C to 125C I ....................................................................10mA DFN .................................................... 65C to 150C VCC I , I , I ........................................................10mA Lead Temperature (Soldering, 10 sec) UV OV OV TSOT .................................................................300C PACKAGE/ORDER INFORMATION LTC2912 1 LTC2912 1 TOP VIEW TOP VIEW V 1 8 LATCH CC LATCH 1 8 V CC VH 2 7 UV UV 2 7 VH 9 VL 3 6 OV OV 3 6 VL TMR GND 4 5 GND 4 5 TMR TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DDB PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFN T = 150C, = 195C/W JMAX JA T = 125C, = 55C/W JMAX JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB LTC2912 2 LTC2912 2 TOP VIEW TOP VIEW V 1 8 DIS CC DIS 1 8 V CC VH 2 7 UV UV 2 7 VH 9 VL 3 6 OV OV 3 6 VL TMR GND 4 5 GND 4 5 TMR TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DDB PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFN T = 125C, = 55C/W JMAX JA T = 125C, = 55C/W JMAX JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB LTC2912 3 LTC2912 3 TOP VIEW TOP VIEW V 1 8 LATCH CC LATCH 1 8 V CC VH 2 7 UV UV 2 7 VH 9 VL OV 3 6 OV 3 6 VL TMR 4 5 GND GND 4 5 TMR TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DDB PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFN T = 125C, = 55C/W JMAX JA T = 125C, = 55C/W JMAX JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB 2912fb 2 For more information www.linear.com/LTC2912