LTC2935 Linear Technology, LTC2935 Datasheet
LTC2935
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LTC2935 Summary of contents
Page 1
... The LTC ® system initialization, power-fail warning and reset gen- eration functions. Low quiescent current (500nA typical) makes the LTC2935 an ideal choice for battery-operated applications. Three binary threshold-select inputs confi gure one of eight integrated reset thresholds, available from 3.3V to 2.25V in 150mV increments. Early warning of an impending low voltage condition is provided at the power-fail output (PFO), whose threshold is 150mV above the confi ...
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... LTC2935 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Input Voltages V ........................................................... –0. S2, S1, S0, MR .........................–0. Output Voltages PFO, RST (LTC2935-1)............................. –0. PFO, RST (LTC2935-2)..............–0. RMS Currents PFO, RST ..........................................................±5mA PIN CONFIGURATION TOP VIEW RST PFO 4 DC PACKAGE 8-LEAD (2mm × ...
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... V Voltage Output Low OL V Voltage Output High (LTC2935- Current Output High, Leakage (LTC2935- Reset Timeout Period RST Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime ...
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... G05 T = 25°C, unless otherwise noted 100 –25 TEMPERATURE (°C) 2935 G02 100 –25 TEMPERATURE (°C) 2935 G04 LTC2935 3.6V CC –40°C 25°C 85°C –0.2 –0.4 –0.6 –0.8 –1 PULL-DOWN CURRENT (mA) 2935 G06 2935f ...
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... The power-fail threshold is 150mV above the confi gured falling reset threshold. PFO is released when V rises above the power-fail CC threshold by 2.5%. PFO is available with open-drain (LTC2935-1) or active pull-up (LTC2935-2) outputs. Leave open if unused. Supply Current vs MR Input Voltage ...
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... LTC2935 BLOCK DIAGRAM TIMING DIAGRAM www.DataSheet4U.com V PFT V RTF V CC PFO t RST RST 900k RC – – GND t RST t PD LTC2935 RST RESET DELAY LTC2935 PFO 2935 BD 2935 TD 2935f ...
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... Because many batteries exhibit large series resistance, load currents can cause signifi cant voltage drops. The low DC current draw of the LTC2935 (at any input volt- age) does not add to the loading problem. When voltage , RST and PFO pull low once there ...
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... LTC2935 APPLICATIONS INFORMATION Selecting Output Logic Style The LTC2935 status outputs are available in two options: open-drain (LTC2935-1) or active pull-up (LTC2935-2). The open-drain option (LTC2935-1) allows the outputs to be pulled user defi ned voltage with a resistor. The open-drain pull-up voltage may be greater than V (5 ...
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... Coin Cell Voltage Monitor PFO CR2032 0.1μF LTC2935 RST GND 2935 TA04 POWER FAIL FAIL THRESHOLD = 2.70V RESET THRESHOLD = 2.55V LTC2935 1.8V 1μF 100k 100k V DD NMI μP RST 2935 TA02 LOW BATTERY SYSTEM RESET LOW BATTERY SYSTEM RESET 2935f ...
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... LTC2935 PACKAGE DESCRIPTION 2.55 ±0.05 1.15 ±0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 BAR TOP MARK (SEE NOTE 6) www.DataSheet4U.com 10 DC Package 8-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1719 Rev Ø) 0.70 ±0.05 0.64 ± ...
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... TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637) 0.65 REF 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.65 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) LTC2935 2.90 BSC (NOTE 4) PIN ONE ID 0.22 – 0.36 8 PLCS (NOTE 3) 0.01 – 0.10 1.95 BSC TS8 TSOT-23 0802 11 2935f ...
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... LDO IN LT3009 MR SHDN V GND CC 100k S0 RST S1 LTC2935-1 S2 PFO GND POWER FAIL FALLING THRESHOLD = 3.15V RESET FALLING THRESHOLD = 3.00V COMMENTS 4.65V Threshold 2.9V Threshold 4.37V/4.62V Threshold 4.725V, 3.118V, 1V Threshold (±0.75%) and ADJ Adjustable Reset and Watchdog Timeouts Individual Monitor Outputs in MSOP ...