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LP3470

SNVS003G – JUNE 1999 – REVISED APRIL 2016

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Copyright © 1999–2016, Texas Instruments Incorporated

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LP3470 is a micropower CMOS voltage supervisor that is ideal for use in battery-powered microprocessor

and other digital systems. It is small in size and provides maximum adjustability for power-on-reset (POR) and

supervisory functions, making it a good solution in a variety of applications. The LP3470 is available in six

standard reset threshold voltage options, and the reset time-out period is adjustable using an external capacitor

providing maximum flexibility in any application. This device can ensure system reliability and ensures that a

8.2 Typical Application

The LP3470 can be used as a simple supervisor circuit to monitor the input supply to a microprocessor as shown

in Figure 10.

Figure 10. Power-On Reset Circuit

8.2.1 Design Requirements

For this design example, use the parameters listed in Table 1 as the input parameters.

Table 1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input supply voltage

0.5 to 5.5 V

Reset threshold voltage

2.63 V, 2.93 V, 3.08 V, 3.65 V, 4 V, 4.38 V, 4.63 V

External pullup resistor

0.68 to 68 k

Ω

External reset time-out period capacitor

Reset time-out period

2 ms