1

2

3

4

5

6

7

8

PGND

SW

MODE

FB

VIN

SGND

NC

EN

1

2

5

4

3

SW

FB

EN

PGND

L1: 2.2 PH

10 PF

4.7 PF

LM3676-

ADJ

2.9V to 5.5V

R1

R2

C1

C2

NC

MODE

SGND

8

6

7

LM3676

SNVS426C – NOVEMBER 2006 – REVISED MAY 2013

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Figure 2. Typical Application Circuit for ADJ Version

PIN DIAGRAM

Figure 3. Top View

WSON-8 Package

Package Number NGQ0008A

PIN DESCRIPTIONS (8-Lead WSON)

Pin No.

Name

Description

1

PGND

Power Ground Pin.

2

SW

Switching node connection to the internal PFET switch and NFET synchronous rectifier.

3

MODE

Mode Control Pin: > 1.0V selects continuous PWM mode ; <0.4V selects Auto (PFM-PWM) mode. Do not

leave this pin floating.

4

FB

Feedback analog input. Connect directly to the output filter capacitor for fixed voltage versions. For

adjustable version external resistor dividers are required (see Figure 2). The internal resistor dividers are

disabled for the adjustable version.

5

EN

Enable pin. The device is in shutdown mode when voltage to this pin is <0.4V and enabled when >1.0V.

Do not leave this pin floating.

6

NC

Not Connected. Leave Pin Floating. Do Not Connect to other pins

7

SGND

Signal Ground Pin.

8

VIN

Power Supply input. Connect to the input filter capacitor (see Figure 1).

2

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