LMT87

SHUTDOWN

Any logic

device output

14

LMT87, LMT87-Q1

SNIS170D – JANUARY 2014 – REVISED JUNE 2017

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Typical Applications (continued)

9.2.2 Conserving Power Dissipation With Shutdown

Figure 15. Simple Shutdown Connection of the LMT87

9.2.2.1 Design Requirements

Because the power consumption of the LMT87 is less than 9 µA, it can simply be powered directly from any logic

gate output and therefore not require a specific shutdown pin. The device can even be powered directly from a

microcontroller GPIO. In this way, it can easily be turned off for cases such as battery-powered systems where

power savings are critical.

9.2.2.2 Detailed Design Procedure

9.2.2.3 Application Curves

Bottom trace: OUT 1 V/div

Figure 16. Output Turnon Response Time Without a

Bottom trace: OUT 1 V/div

Figure 17. Output Turnon Response Time With a 1.1-nF

Bottom trace: OUT 1 V/div

Figure 18. Output Turnon Response Time Without a

Bottom trace: OUT 1 V/div

Figure 19. Output Turnon Response Time With a 1.1-nF

10 Power Supply Recommendations

The low supply current and supply range (2.7 V to 5.5 V) of the LMT87 allow the device to easily be powered

from many sources. Power supply bypassing is optional and is mainly dependent on the noise on the power

supply used. In noisy systems it may be necessary to add bypass capacitors to lower the noise that is coupled to

the output of the LMT87.