OUT

PG

1.3 V ± 6 V

EN

LP5922

0.5 V ± 5 V

IN

FPGA

GND

FB

SS/NR

22 µF

22 µF

IN

OUT

100 k

Copyright © 2016, Texas Instruments Incorporated

13

LP5922

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Copyright © 2016, Texas Instruments Incorporated

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. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LP5922 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 22 µF. The LP5922 delivers this performance in an industry-standard WSON package which, for this

8.2 Typical Application

Figure 15 shows the typical application circuit for the LP5922. Input and output capacitances may need to be

increased above 22 µF minimum for some applications.

Figure 15. LP5922 Typical Application

8.2.1 Design Requirements

For typical LP5922 applications, use the parameters listed in Table 1.

Table 1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage

2.25 V to 2.75 V

Output voltage

1.8 V

Output current

2000 mA

Output capacitor range

22 µF to 47 µF

Output capacitor ESR range

2 mΩ to 500 mΩ