LTC2903-1 Precision Quad Supply Monitor in 6-Lead SOT-23 FEATURES DESCRIPTIO Ultralow Voltage Reset: V = 0.5V Guaranteed The LTC 2903-1 monitors up to four supply voltages. The CC Monitor Four Inputs Simultaneously common reset output remains low until all four inputs 3.3V, 2.5V, 1.8V, ADJ (LTC2903-A1) have been in compliance for 200ms. Voltage thresholds 5V, 3.3V, 2.5V, 1.8V (LTC2903-B1) maintain 1.5% accuracy over temperature (with respect 5V, 3.3V, 1.8V, 5.2V (LTC2903-C1) to the monitored voltage). The LTC2903-1 features an 3.3V, ADJ, ADJ, ADJ (LTC2903-D1) open-drain RST output with a weak internal pullup. 5V, ADJ, ADJ, ADJ (LTC2903-E1) Internal supply voltage (V ) is generated from the greater CC Guaranteed Threshold Accuracy: 1.5% of voltage on the V1, V2 inputs. V = V1 for LTC2903-D1 and CC Monitored Voltage over Temperature LTC2903-E1. The RST output is guaranteed to sink at least 10% (A1, B1, C1) and 5% (D1, E1) Undervoltage 5A (V = 0.15V) for V down to 0.5V and will typically OL CC Monitoring conduct current down to 0V. Quiescent current is 20A Low Supply Current: 20A Typical typical, making the LTC2903-1 ideal for power conscious 200ms Reset Time Delay systems. The LTC2903-1 is available in a 6-lead low profile Active Low Open-Drain RST Output (1mm) SOT-23 package. Power Supply Glitch Immunity , LTC and LT are registered trademarks of Linear Technology Corporation. TM Low Profile (1mm) SOT-23 (ThinSOT ) Package ThinSOT is a trademark of Linear Technology Corporation. U APPLICATIO S Multivoltage Systems Optical Networking Systems Cell Phone Base Stations Network Servers TYPICAL APPLICATIO Low Voltage Reset Pull-Down Performance vs External Pull-Up Current and Input Supply Voltage 0.10 V = V1 = V2 = V3 IN 5V 0.09 LTC2903-B1 3.3V DC/DC SYSTEM 0.08 2.5V CONVERTER LOGIC 0.07 1.8V 20A 0.06 10A LTC2903-B1 0.05 V1 RST 0.04 C1 5A 0.1F 0.03 GND V4 C2 0.02 2A 0.1F V2 V3 2903 TA01 0.01 1A 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 V , INPUT SUPPLY VOLTAGE (V) IN 2903 TA01b 29031f a 1 RESET PIN VOLTAGE (V) U ULTC2903-1 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Notes 1, 2, 3) TOP VIEW V1, V2 ...................................................... 0.3V to 6.5V V3 ................................................. 2.7V or (V + 0.3V) V1 1 6 RST CC GND 2 5 V4 V4 (LTC2903-A1, -B1, -D1, -E1) ...............0.3V to 6.5V V2 3 4 V3 V4 (LTC2903-C1) .................................... 6.5V to 0.3V RST ........................................................ 0.3V to 6.5V S6 PACKAGE 6-LEAD PLASTIC TSOT-23 Operating Temperature Range T = 125C, = 230C/W JMAX JA LTC2903C-X1 .......................................... 0C to 70C LTC2903I-X1 ...................................... 40C to 85C ORDER PART NUMBER S6 PART MARKING Storage Temperature Range ................ 65C to 150C LTC2903CS6-A1 LTAFV Lead Temperature (Soldering, 10 sec)................. 300C LTC2903CS6-B1 LTAJN LTC2903CS6-C1 LTAJQ LTC2903CS6-D1 LTBMX LTC2903CS6-E1 LTBMZ LTC2903IS6-A1 LTAFW LTC2903IS6-B1 LTAJP LTC2903IS6-C1 LTAJR LTC2903IS6-D1 LTBMY LTC2903IS6-E1 LTBNB Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS (LTC2903-A1) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 3.3V unless otherwise noted. A CC SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V 3.3V, 10% Reset Threshold V1 Input Threshold 2.871 2.921 2.970 V RT33 V 2.5V, 10% Reset Threshold V2 Input Threshold 2.175 2.213 2.250 V RT25 V 1.8V, 10% Reset Threshold V3 Input Threshold 1.566 1.593 1.620 V RT18 V Adjustable Reset Threshold V4 Input Threshold 0.492 0.500 0.508 V RTA (LTC2903-B1) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 5V unless otherwise noted. A CC SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V 5V, 10% Reset Threshold V1 Input Threshold 4.350 4.425 4.500 V RT50 V 3.3V, 10% Reset Threshold V2 Input Threshold 2.871 2.921 2.970 V RT33 V 2.5V, 10% Reset Threshold V3 Input Threshold 2.175 2.213 2.250 V RT25 V 1.8V, 10% Reset Threshold V4 Input Threshold 1.566 1.593 1.620 V RT18 (LTC2903-C1) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 5V unless otherwise noted. A CC SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V 5V, 10% Reset Threshold V1 Input Threshold 4.350 4.425 4.500 V RT50 V 3.3V, 10% Reset Threshold V2 Input Threshold 2.871 2.921 2.970 V RT33 V 1.8V, 10% Reset Threshold V3 Input Threshold 1.566 1.593 1.620 V RT18 V 5.2V, 10% Reset Threshold V4 Input Threshold 4.524 4.602 4.680 V RT52N 29031f a 2 U W U U WWW