LTC1540 Nanopower Comparator with Reference FEATURES DESCRIPTION n Ultralow Quiescent Current: 0.3A Typ The LTC 1540 is an ultralow power, single compara- n Reference Output Drives 0.01F Capacitor tor with built-in reference. The comparators features n Adjustable Hysteresis include less than 0.6A supply current over the commercial n Available in 3mm 3mm 0.8mm DFN Package temperature range, a 1.182V 2% reference, program- n Wide Supply Range: 2V to 11V mable hysteresis and TTL/CMOS outputs that sink and n Input Voltage Range Includes the Negative Supply source current. The reference output can drive a bypass n Reference Output Sources Up to 1mA capacitor of up to 0.01F without oscillation. n TTL/CMOS Compatible Outputs The comparator operates from a single 2V to 11V supply n 60s Propagation Delay with 10mV Overdrive or a dual 1V to 5.5V supply. Comparator hysteresis is n No Crowbar Current easily programmed by using two resistors and the HYST n 40mA Continuous Source Current pin. Each comparators input operates from the negative n Pin Compatible with LTC1440, MAX921, MAX931 supply to within 1.3V of the positive supply. The compara- tor output stage can continuously source up to 40mA. By APPLICATIONS eliminating the cross-conducting current that normally occur when the comparator changes logic states, power n Battery-Powered System Monitoring supply glitches are eliminated. n Threshold Detectors n Window Comparators The LTC1540 is available in the 8-pin MSOP and SO n Oscillator Circuits packages. For space limited applications, the LTC1540 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load is available in a 3mm 3mm low profile (0.8mm) dual is a trademark of Analog Devices, Inc. All other trademarks are the property of their respective fine-pitch leadless package (DFN). owners. TYPICAL APPLICATION Nanopower 2.9V V Threshold Detector CC 3.3V LTC1540 Supply Current vs Temperature 0.50 + 7 R1 V = 5V + 4.32M V = GND = 0V 0.45 V LTC1540 1% + 3 IN + 0.40 8 R2 OUT 3M 0.35 4 IN 1% 0.30 5 HYST 0.25 6 REF 0.20 0.15 40 20 0 20 40 60 80 100 V GND TEMPERATURE (C) 2 1 1540 TA02 1540 TA01 1540fb 1 For more information www.linear.com/LTC1540 SUPPLY CURRENT (A)LTC1540 ABSOLUTE MAXIMUM RATINGS (Note 1) + Voltage OUT Short-Circuit Duration (V 5.5V) ..... Continuous + + V to V , V to GND, GND to V .............12V to 0.3V Power Dissipation ............................................ 500mW + + IN , IN , HYST ................... (V + 0.3V) to (V 0.3V) Operating Temperature Range + REF .................................... (V + 0.3V) to (V 0.3V) LTC1540C ............................................... 0C to 70C + OUT ............................... (V + 0.3V) to (GND0.3V) LTC1540I .............................................40C to 85C Current Storage Temperature Range ................ 65C to 150C + IN , IN , HYST ...................................................20mA (DD Package) ..................................... 65C to 125C REF ....................................................................20mA Lead Temperature (Soldering, 10 sec) ...................300C OUT ...................................................................50mA PIN CONFIGURATION TOP VIEW TOP VIEW TOP VIEW GND 1 8 OUT GND 1 8 OUT + GND 1 8 OUT V 2 7 V + 9 V 2 7 V + V 2 7 V + V IN REF + 3 6 + IN 3 6 REF IN 3 6 REF 5 HYST IN 4 IN 4 5 HYST IN 4 5 HYST MS8 PACKAGE 8-LEAD PLASTIC MSOP S8 PACKAGE DD PACKAGE T = 150C, = 250C/W 8-LEAD PLASTIC SO 8-LEAD (3mm 3mm) PLASTIC DFN JMAX JA T = 125C, = 160C/W (NOTE 2) UNDERSIDE METAL T = 150C, = 175C/W JMAX JA JMAX JA CONNECTED TO V (PCB CONNECTION OPTIONAL) ORDER INFORMATION