Connection Diagram

Ordering Information

V

OUT

Part Number

Package Type

NSC Package

Drawing

Supplied as 94 Units, Rail

Supplied as 2.5k Units, Tape

and Reel

1.8

LM2651MTC-1.8

LM2651MTCX-1.8

TSSOP-16

MTC16

2.5

LM2651MTC-2.5

LM2651MTCX-2.5

3.3

LM2651MTC-3.3

LM2651MTCX-3.3

ADJ

LM2651MTC-ADJ

LM2651MTCX-ADJ

Pin Description

Pin

Name

Function

1, 2

SW

Switched-node connection, which is connected with the source of the internal high-side

MOSFET.

3-5

VIN

Main power supply pin.

6

VCB

Bootstrap capacitor connection for high-side gate drive.

7

AVIN

Input supply voltage for control and driver circuits.

8

SD(SS)

Shutdown control input, active low. This pin can also function as soft-start control pin. A

capacitor connected from this pin to ground sets the ramp time to full current output.

9

FB

Output voltage feedback input. Connected to the output voltage.

10

COMP

Compensation network connection. Connected to the output of the voltage error

amplifier.

11

NC

No internal connection.

12-13

AGND

Low-noise analog ground.

14-16

PGND

Power ground.

16-Lead TSSOP (MTC)

DS100925-2

www.national.com

2