8 Applications 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, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

The LP5910 is designed to meet the requirements of RF and analog circuits, by providing low noise, high

PSRR, low quiescent current, and low line or load transient response figures. The device offers excellent noise

performance without the need for a noise bypass capacitor and is stable with input and output capacitors with

a value of 1 µF. The LP5910 delivers this performance in an industry-standard DSBGA package which, for this

8.2 Typical Application

Figure 8-1 shows the typical application circuit for the LP5910. Input and output capacitances may need to be

increased above 1-µF minimum for some applications.

IN

OUT

GND

EN

LP5910

Enable

1 µF

1 µF

Figure 8-1. LP5910 Typical Application

8.2.1 Design Requirements

For typical LP5910 applications, use the parameters listed in Table 8-1.

Table 8-1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage

1.3 V to 3.3 V

Output voltage

0.8 V to 2.3 V

Output current

300 mA

Output capacitor range

1 µF to 10 µF

8.2.2 Detailed Design Procedure

8.2.2.1 External Capacitors

Like most low-dropout regulators, the LP5910 requires external capacitors for regulator stability. The device is

specifically designed for portable applications requiring minimum board space and smallest components. These

capacitors must be correctly selected for good performance.

8.2.2.2 Input Capacitor

An input capacitor is required for stability. It is recommended that a 1-µF capacitor be connected from the

LP5910 IN pin to ground. (This capacitance value may be increased without limit.) The input capacitor must be

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LP5910

SNVSA91F – SEPTEMBER 2015 – REVISED APRIL 2021

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