1

2

3

6

5

4

OUT

NC

GND

IN

NC

EN

OUT

IN

GND

EN

A2

B2

A1

B1

Via

17

LP5910

www.ti.com

SNVSA91C – SEPTEMBER 2015 – REVISED JUNE 2016

Product Folder Links: LP5910

Submit Documentation Feedback

Copyright © 2015–2016, Texas Instruments Incorporated

9 Power Supply Recommendations

This device is designed to operate from an input supply voltage range of 1.3 V to 3.3 V. The input supply must

be well regulated and free of spurious noise. To ensure that the LP5910 output voltage is well regulated and

10 Layout

10.1 Layout Guidelines

The dynamic performance of the LP5910 is dependant on the layout of the PCB. PCB layout practices that are

adequate for typical LDOs may degrade the PSRR, noise, or transient performance of the LP5910.

GND pin using as wide and as short of a copper trace as is practical.

Avoid connections using long trace lengths, narrow trace widths, and/or connections through vias. These add

parasitic inductances and resistance that results in inferior performance especially during transient conditions.

10.2 Layout Examples

Figure 28. LP5910 Typical DSBGA Layout

Figure 29. LP5910 Typical WSON Layout

10.3 DSBGA Mounting

The DSBGA package requires specific mounting techniques, which are detailed in AN-1112 DSBGA Wafer Level

Chip Scale Package (SNVA009). For best results during assembly, alignment ordinals on the PC board may be

used to facilitate placement of the DSBGA device.

10.4 DSBGA Light Sensitivity

Exposing the DSBGA device to direct light may cause incorrect operation of the device. High intensity light

sources such as halogen lamps can affect electrical performance if they are situated in close proximity to the

device. The wavelengths that have the most detrimental effect are reds and infra-reds, which means that the

fluorescent lighting used inside most buildings has little effect on performance.