LED

GND

CTRL

VDD

0.1 F

Optional

bypass capacitor

VIA to GND

VIA to

GND

VIA to VDD

To control

signal

22

LP5560

SNVS873D – AUGUST 2012 – REVISED JUNE 2016

www.ti.com

Product Folder Links: LP5560

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Copyright © 2012–2016, Texas Instruments Incorporated

9 Power Supply Recommendations

The LP5560 is designed to operate from an input voltage supply range between 2.7 V and 5.5 V. This input

supply must be well regulated. If the input voltage has high noise content TI recommends adding a dedicated

ceramic bypass capacitor close to the VDD and GND pins. Depending on the selected LED it may be necessary

to increase the minimum input voltage. The minimum input voltage must always be 100 mV higher than the LED

maximum forward voltage.

10 Layout

10.1 Layout Guidelines

•

Normally the LP5560 device does not require any external components except for the LED. However, in a

noisy environment a small 0.1-µF bypass capacitor can be connected between VIN and GND pins.

•

TI recommends routing the pins in a 45-degree angle to avoid component rotation during soldering process.

•

Use traces with similar width for all pins. This makes the exposed copper area similar for all pins and

improves the soldering reliability.

•

Obtain the minimum clearance and trace width from the manufacturer of the PCB used for the board.

10.2 Layout Example

Figure 27. LP5560 Layout Example