GND_EN_IN
EN pin to VIN
(Output enabled)
Setup
2.3
Operation
For proper operation of the LP5910YKA EVM, the jumper terminals should be properly configured. The
default, and recommended, jumper setting is:
Figure 3. Jumper Settings
GND_EN_IN
shunt across the EN_IN terminal pins.
In this configuration, the device will power up when power is applied at the VIN terminal.
2.4
Options
The LP5910YKA EVM has some assorted unpopulated footprints that some users may find useful:
•
Footprint for optional input capacitors at C4 (0805), and C5 (0603).
•
Footprints for optional output capacitors at C1 (0805), C2 (0603), and C3 (0402)
•
Footprints for optional end launch SMA connectors (Emerson 142-0701-851, or equivalent) at VIN (J2)
and VOUT (J1) for noise or PSRR testing.
3
Board Layout
through
show the board layout for the LP5910YKA EVM PCB. The EVM offers a jumper
terminal to program the EN pin status, and spare footprints for assorted capacitors for the input and
output.
The LP5910 will dissipate power. The 4-pin YKA (DSBGA) package does not offer any exposed thermal
pad. Careful consideration should be given to the power dissipated in the package to prevent the device
temperature from exceeding the recommended operating junction temperature.
Figure 4. Top Assembly Layer and Silk-Screen
Figure 5. Top-Layer Routing
3
SNVU487 – September 2015
LP5910YKA EVM User Guide
Copyright © 2015, Texas Instruments Incorporated
