LTC1843 Datasheet | Linear Technology

LTC1841/LTC1842/LTC1843 Ultralow Power Dual parators with Reference Features s s DESCRIPTION The LTC ®1841/LTC1842/LTC1843 are ultralow power dual parators with built-in reference (LTC1842/LTC1843). The parators feature less than 5.7µA supply current over temperature, a 1.182V ± 1% reference, programmable hysteresis and open-drain outputs that sink current. The reference output can drive a bypass capacitor of up to 0.01µF without oscillation. The LTC1841 operates from a single 2V to 11V supply or a dual ± 1V to ± 5.5V supply. The LTC1842/LTC1843 operate from a single 2.5V to 11V supply or a dual ± 1.25V to ± 5.5V supply. The LTC1842/LTC1843 hysteresis is easily programmed by using two resistors and the HYST pin. The parators’ input operates from the negative supply to within 1.3V of the positive supply. The parators’ output stage can typically sink greater than 20m A. By eliminating the cross-conduction current that normally happens when the parators change logic states, power supply glitches are eliminated. The LTC1841/LTC1842/LTC1843 are available in SO-8 packages. s s s s s s Ultralow Quiescent Current: 3.5µA Typ Open-Drain Outputs Typically Sink Greater Than 20m A Wide Supply Range: (LTC1841) Single: 2V to 11V Dual: ± 1V to ± 5.5V Input Voltage Range Includes the Negative Supply Reference Output Drives 0.01µF Capacitor Adjustable Hysteresis 12µs Propagation Delay with 10m V Overdrive No Current Spike When Switching U APPLICATIONS s s s s Battery-Powered System Monitoring Threshold Detectors Window parators Oscillator Circuits , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION Single Li-Ion Cell to 5V Supply 1-CELL Li-Ion BATTERY R1 1.5M + C1 100µF R6 25k 7 VCC LTC1843 OUT B 8 6 VIN L1 10µH 7 SW D1 4 IN B - - + SUPPLY CURRENT (µA) R2 100k 3 IN A+ R3 1M LT1302-5 Si9924DY 3 SHDN IT 8 4 PGND SENSE VC GND 2 RC 20k CC 0.0µF 1 OUTPUT 5V 600m A + C2 100µF + OUT A 1 R7 500k 6 REF - V- 2...