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LTC1326

Linear Technology
Part Number LTC1326
Manufacturer Linear Technology
Description Micropower Precision Triple Supply Monitors
Published Mar 22, 2005
Detailed Description LTC1326/LTC1326-2.5 Micropower Precision Triple Supply Monitors FEATURES s DESCRIPTIO s s s s s s s s s Simultaneou...
Datasheet PDF File LTC1326 PDF File

LTC1326
LTC1326

Overview
LTC1326/LTC1326-2.
5 Micropower Precision Triple Supply Monitors FEATURES s DESCRIPTIO s s s s s s s s s Simultaneously Monitors Three Supplies LTC1326: 5V, 3.
3V and ADJ LTC1326-2.
5: 2.
5V, 3.
3V and ADJ Guaranteed Threshold Accuracy: ± 0.
75% Low Supply Current: 20µA Internal Reset Time Delay: 200ms Manual Push-Button Reset Input Active Low and Active High Reset Outputs Active Low “Soft” Reset Output Power Supply Glitch Immunity Guaranteed RESET for VCC3 ≥ 1V or VCC5 ≥ 1V or VCC25 ≥ 1V 8-Pin SO and MSOP Packages The LTC®1326/LTC1326-2.
5 are triple supply monitors intended for systems with multiple supply voltages.
They provide micropower operation, small size and high accuracy supply monitoring.
Tight 0.
75% threshold accuracy and glitch immunity ensure reliable reset operation without false triggering.
The 20µA typical supply current makes the LTC1326/ LTC1326-2.
5 ideal for power-conscious systems.
The RST output is guaranteed to be in the correct state for VCC3, VCC5 or VCC25 down to 1V.
The LTC1326/LTC1326-2.
5 can be configured to monitor one, two or three inputs, depending on system requirements.
A manual push-button reset input provides the ability to generate a very narrow “soft” reset pulse (100µs typ) or a 200ms reset pulse equivalent to a power-on reset.
Both SRST and RST outputs are open-drain and can be OR-tied with other reset sources.
, LTC and LT are registered trademarks of Linear Technology Corporation.
U APPLICATIO S s s s s Desktop Computers Notebook Computers Intelligent Instruments Portable Battery-Powered Equipment TYPICAL APPLICATIO DC/DC CONVERTER 2.
5V 3.
3V VCORE RST Output Voltage vs Supply Voltage (LTC1326-2.
5) 3.
5 SYSTEM LOGIC 3.
0 RST OUTPUT VOLTAGE (V) 2.
5 2.
0 1.
5 1.
0 0.
5 VCC25 = VCCA = VCC3 4.
7k PULL-UP FROM RST TO VCC3 TA = 25°C 0.
1µF VCC25 VCC3 VCCA LTC1326-2.
5 RST PBR PUSH-BUTTON RESET GND SRST 0 0 0.
5 1.
0 1.
5 2.
0 VCC3 (V) 2.
5 3.
0 3.
5 1326/2.
5 TA01 U 1326/2.
5 TA02 U 1 LTC1326/LTC1326-2.
5 ABSOLUTE (Notes 1, 2) AXI U RA...


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