LP5569 datasheet(4/93 Pages) TI2

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LP5569

SNVSAP8A – JULY 2017 – REVISED SEPTEMBER 2017

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Pin Functions (continued)

TYPE(1)

DESCRIPTION

NAME

NO.

GPIO/TRIG/INT

I, OD

General-purpose input or open-drain output, or trigger input or open-drain output, or

interrupt open-drain output. This pin function is configured in the I2C registers. By default

this pin is a general-purpose output (open-drain) and can be left floating if not used.

LED0

LED current sink 0. If not used, this pin can be left floating.

LED1

LED current sink 1. If not used, this pin can be left floating.

LED2

LED current sink 2. If not used, this pin can be left floating.

LED3

LED current sink 3. If not used, this pin can be left floating.

LED4

LED current sink 4. If not used, this pin can be left floating.

LED5

LED current sink 5. If not used, this pin can be left floating.

LED6

LED current sink 6. If not used, this pin can be left floating.

LED7

LED current sink 7. If not used, this pin can be left floating.

LED8

LED current sink 8. If not used, this pin can be left floating.

PGND

Charge-pump power ground. Connect to AGND, exposed thermal pad, and common

ground plane.

SCL

I2C bus clock line. If not used, this pin must be connected to GND or VIN.

SDA

I, OD

I2C bus data line. If not used, this pin must be connected to GND or VIN.

V1P8

Input power for digital circuitry.

VIN

Input power, a 1-µF capacitor must be connected between PGND and this pin.

VOUT

Charge-pump output voltage. If charge pump is used, a 1-µF capacitor must be

connected between PGND and this pin. If charge pump is not used or is used in 1×

mode only, the capacitor can be omitted.

Exposed thermal

pad

—

Must be connected to AGND (pin 4), PGND (pin 21), and common ground plane. See

Layout Example. Must be soldered to achieve appropriate power dissipation and

mechanical reliability.

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