3MHz 2.4A Synchronous Buck Converter

2

Pin Configuration and Pinout

PGND

SW

GND

FB

EN

PG

VCC

PVIN

1

2

3

4

5

6

7

8

Figure 2 · Pinout DFN 2mmx2mm 8L Top View

Marking: First Line 7167

Second Line YWWA (Year/Work Week/Lot Code)

Ordering Information

Pin Description

Pin

Number

Pin

Designator

Description

1

PGND

Ground pin for the power stage.

2

SW

Switch-node pin. Connect the output inductor between this pin and output capacitor.

When the chip is DISABLED, the internal discharge resistor will be enabled to discharge

the output capacitance. The current will flow into this pin.

3

GND

Ground pin.

4

FB

Voltage feedback pin. Connect to the output terminal through a resistor divider network

to set the output voltage of the regulator to the desired value.

5

EN

Pull this pin higher than 1V will enable the controller. When pulled low, the IC will turn

off and the Internal discharge FET will turn on to discharge the output capacitor through

the SW pin.

6

PG

Power-good pin. This is an open-drain output and should be connected to a voltage

rail with an external pull-up resistor. During the power on, this pin switches from

LOW to HI state when FB voltage reaches above the power good threshold and the

internal soft start has finished its operation. It will be pulled low when the FB falls

below the power-good threshold minus the hysteresis. It will turn back on when the

pull FB rises above the threshold.

7

VCC

Analog input voltage terminal. Connect this pin to VIN with a 10ohm resistor and

connect a 1µF ceramic capacitor from VCC to GND.

8

PVIN

Input voltage terminal of the regulator. A minimum of 10µF, X5R type ceramic

capacitor must be connected as close as possible from this pin to PGND plane to

insure proper operation.

Power PAD

For good thermal connection, this PAD must be connected using thermal VIAs to the

GND plane and to the LAND pattern of the IC.

Ambient Temperature

Type

Package

Part Number

Packaging Type

-10°C to 85°C

RoHS Compliant,

Pb-free

DFN 2mmx2mm 8L

LX7167CLD

Bulk / Tube

LX7167CLD-TR

Tape and Reel