Connection Diagram

30074102

7-Lead Plastic TO-263 THIN Package

NS Package Number TJ7A

Ordering Information

Output

Voltage

Order Number

Package Type

NSC Package

Drawing

Supplied As

Features

ADJ

LM22677TJE-ADJ

TO-263 THIN

Exposed Pad

TJ7A

250 Units in Tape and Reel

ADJ

LM22677TJ-ADJ

1000 Units in Tape and Reel

5.0

LM22677TJE-5.0

250 Units in Tape and Reel

5.0

LM22677TJ-5.0

1000 Units in Tape and Reel

ADJ

LM22677QTJE-ADJ

TO-263 THIN

Exposed Pad

TJ7A

250 Units in Tape and Reel

AEC-Q100

Grade 1

qualified.

Automotive

Grade

Production Flow*

ADJ

LM22677QTJ-ADJ

1000 Units in Tape and Reel

5.0

LM22677QTJE-5.0

250 Units in Tape and Reel

5.0

LM22677QTJ-5.0

1000 Units in Tape and Reel

*Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies.

Reliability qualification is compliant with the requirements and temperature grades defined in the AEC-Q100 standard. Automotive grade products are identified

with the letter Q. For more information go to http://www.national.com/automotive.

Pin Descriptions

Pin

Name

Description

Application Information

1

SW

Switch pin

Attaches to the switch node.

2

VIN

Source input voltage

Input to the regulator. Operates from 4.5V to 42V.

3

BOOT

Bootstrap input

Provides the gate voltage for the high side NFET.

4

GND

System ground

Provide good capacitive decoupling between VIN and this pin.

5

RT/SYNC

Oscillator frequency adjust

pin or frequency

synchronization

A resistor connected from this pin to GND adjusts the oscillator frequency. This

pin can also accept an input for synchronization from an external clock. Pin can

be left floating and internal setting will be default to 500 kHz.

6

FB

Feedback pin

Inverting input to the internal voltage error amplifier.

7

EN

Precision enable pin

When pulled low regulator turns off.

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