LP8733 datasheet(3/84 Pages) TI

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5 Pin Configuration and Functions

VIN_LDO1

nINT

CLKIN

VIN_B1

SW_B1

SW_B0

VIN_B0

GPO

PGOOD

VIN_LDO0

THERMAL PAD

Figure 5-1. RHD Package 28-Pin VQFN With Thermal Pad Top View

Table 5-1. Pin Functions

TYPE(1)

DESCRIPTION

NUMBER

NAME

VOUT_LDO0

P/O

LDO0 output. If the LDO0 is not used, leave the pin floating.

FB_B0

Output voltage feedback (positive) for Buck 0.

FB_B1

Output voltage feedback (positive) for Buck 1 in two single-phase configuration and output

ground feedback (negative) for Buck 0 in dual-phase configuration.

AGND

Ground.

VANA

P/I

Supply voltage for analog and digital blocks. Must be connected to same node with VIN_Bx.

D/I

Programmable enable signal for regulators and GPOs. If the pin is not used, leave the pin

floating.

VOUT_LDO1

P/O

LDO1 output. If LDO1 is not used, leave the pin floating.

VIN_LDO1

P/I

Power input for LDO1. If LDO1 is not used, connect the pin to VANA.

nINT

D/O

Open-drain interrupt output. Active LOW. If the pin is not used, connect the pin to ground.

CLKIN

D/I/O

External clock input. Alternative function is general-purpose digital output (GPO2). If the pin is

not used, leave the pin floating.

11, 12

VIN_B1

P/I

Input for Buck 1. The separate power pins VIN_Bx are not connected together internally -

VIN_Bx pins must be connected together in the application and be locally bypassed.

13, 14

SW_B1

P/O

Buck 1 switch node. If the Buck 1 is not used, leave the pin floating.

15, 16

PGND_B1

P/G

Power ground for Buck 1.

SCL

D/I

Serial interface clock input for I2C access. Connect a pullup resistor. If the I2C interface is not

used, connect the pin to Ground.

SDA

D/I/O

Serial interface data input and output for I2C access. Connect a pullup resistor. If the I2C

interface is not used, connect the pin to Ground.

SGND

Ground.

20, 21

PGND_B0

P/G

Power ground for Buck 0.

22, 23

SW_B0

P/O

Buck 0 switch node. If the Buck 0 is not used, leave the pin floating.

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LP8733

SNVSBK2A – SEPTEMBER 2019 – REVISED JUNE 2021

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