2.2 µF

10 nF

1 µF

1

ON/OFF

2

GND

3

5

4

BYPASS

LP2985

LP2985

SLVS522O – JULY 2004 – REVISED JANUARY 2015

www.ti.com

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 following application schematic shows the standard usage of the LP2985 as a low-dropout regulator.

8.1.1 Typical Application

8.1.2 Design Requirements

Optional BYPASS capacitor for low-noise operation

8.1.3 Capacitors

A minimum value of 1

μF (over the entire operating temperature range) is required at the input of the LP2985. In

addition, this input capacitor should be located within 1 cm of the input pin and connected to a clean analog

ground. There are no equivalent series resistance (ESR) requirements for this capacitor, and the capacitance

can be increased without limit.

12

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