LTC2909IDDB-3.3#TRM Analog Devices

LTC2909 Precision Triple/Dual Input UV, OV and Negative Voltage Monitor DESCRIPTIO FEATURES Two Low Voltage Adjustable Inputs (0.5V) The LTC 2909 is a dual input monitor intended for a variety Pin Selectable Input Polarity Allows Negative of system monitoring applications. Polarity selection and and OV Monitoring a buffered reference output allow the LTC2909 to monitor Guaranteed Threshold Accuracy: 1.5% positive and negative supplies for undervoltage (UV) and 6.5V Shunt Regulator for High Voltage Operation overvoltage (OV) conditions. Low 50A Quiescent Current The two inputs have a nominal 0.5V threshold, featuring Buffered 1V Reference for Negative Supply Offset tight 1.5% threshold accuracy over the entire operating Input Glitch Rejection temperature range. Glitch ltering ensures reliable reset Adjustable Reset Timeout Period operation without false triggering. A third xed-threshold Selectable Internal Timeout Saves Components UVLO monitor on the parts V (also 1.5% accuracy) is CC Open-Drain RST Output available for standard logic supplies. Accurate UVLO for 2.5V, 3.3V, 5V Systems The common reset output has a timeout that may use Ultralow Voltage Reset: V = 0.5V Guaranteed CC a preset 200ms, be set by an external capacitor or be Space Saving 8-Lead TSOT-23 and 3mm 2mm DFN disabled. A three-state input pin sets the input polarity Packages of each adjustable input without requiring any external U components. APPLICATIO S The LTC2909 provides a highly versatile, precise, space- Desktop and Notebook Computers conscious, micropower solution for supply monitoring. Handheld Devices , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Network Servers All other trademarks are the property of their respective owners. Core, I/O Monitor Automotive TYPICAL APPLICATIO 3.3V UV/OV (Window) Monitor Application with 200ms Internal Timeout (3.3V Logic Out) SEL Pin Connection for Input Polarity C BYP Combinations 100nF 3.3V POLARITY R R P6 PU V ADJ1 ADJ2 SEL PIN 453k CC 10k FAULT ADJ1 RST OUTPUT V ++ CC LTC2909-2.5 R P5 REF SEL 10.7k OPEN + ADJ2 TMR GND R P4 GND 76.8k 2909 TA01a 2909fb 1 U ULTC2909 ABSOLUTE AXI U RATI GS (Notes 1, 2) Terminal Voltages Operating Temperature Range V (Note 3) ............................................. 0.3V to 6V LTC2909C ................................................ 0C to 70C CC SEL, RST .............................................. 0.3V to 7.5V LTC2909I ............................................. 40C to 85C ADJ1, ADJ2 .......................................... 0.3V to 7.5V Storage Temperature Range TMR ..........................................0.3V to (V + 0.3V) DFN .................................................... 65C to 125C CC Terminal Currents TSOT-23 ............................................. 65C to 150C I (Note 3) ....................................................10mA Lead Temperature (Soldering, 10 sec) VCC I ....................................................................1mA TSOT-23 ............................................................300C REF UUW PACKAGE/ORDER I FOR ATIO ORDER PART DDB PART* TOP VIEW NUMBER MARKING SEL 1 8 ADJ1 LTC2909CDDB-2.5 LBXG TMR 2 7 ADJ2 9 LTC2909IDDB-2.5 LBXG V 3 6 REF CC LTC2909CDDB-3.3 LBZS RST 4 5 GND LTC2909IDDB-3.3 LBZS DDB PACKAGE LTC2909CDDB-5 LBZT 8-LEAD (3mm 2mm) PLASTIC DFN LTC2909IDDB-5 LBZT T = 125C, = 76C/W JMAX JA EXPOSED PAD (PIN 9) MAY BE LEFT OPEN OR TIED TO GND (PCB CONNECTION REQUIRED FOR STATED ) JA ORDER PART TS8 PART* TOP VIEW NUMBER MARKING ADJ1 1 8 SEL ADJ2 2 7 TMR LTC2909CTS8-2.5 LTBXF REF 3 6 V CC LTC2909ITS8-2.5 LTBXF GND 4 5 RST LTC2909CTS8-3.3 LTBZV TS8 PACKAGE LTC2909ITS8-3.3 LTBZV 8-LEAD PLASTIC TSOT-23 T = 125C, = 250C/W JMAX JA LTC2909CTS8-5 LTBZW LTC2909ITS8-5 LTBZW Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: