LM22670

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SNVS584O – SEPTEMBER 2008 – REVISED MARCH 2013

PIN DESCRIPTIONS (continued)

Pin Numbers

SO

Pin Numbers

Name

Description

Application Information

PowerPAD-8

PFM Package

Package

3

5

RT/SYNC

Oscillator mode control input

Used to control oscillator mode of regulator. See

Frequency Adjustment and Synchronization section of

data sheet.

4

6

FB

Feedback input

Feedback input to regulator.

5

7

EN

Enable input

Used to control regulator start-up and shut-down. See

Precision Enable section of data sheet.

6

4

GND

Ground input to regulator; system

System ground pin.

common

7

2

VIN

Input voltage

Supply input to the regulator.

8

1

SW

Switch output

Switching output of regulator.

EP

EP

EP

Exposed Pad

Connect to ground. Provides thermal connection to PCB.

See Application Information.

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.

Absolute Maximum Ratings

(1) (2)

VIN to GND

43V

EN Pin Voltage

-0.5V to 6V

RT/SYNC Pin Voltage

-0.5V to 7V

BOOT Pin Voltage

FB Pin Voltage

-0.5V to 7V

Power Dissipation

Internally Limited

Junction Temperature

150°C

For soldering specifications, refer to the following document: www.ti.com/lit/snoa549

Human Body Model

±2 kV

Storage Temperature Range

-65°C to +150°C

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of

device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or

other conditions beyond those indicated in the recommended Operating Ratings is not implied. The recommended Operating Ratings

indicate conditions at which the device is functional and should not be operated beyond such conditions.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

(3)

The absolute maximum specification of the ‘SW to GND’ applies to DC voltage. An extended negative voltage limit of -10V applies to a

pulse of up to 50 ns.

(4)

ESD was applied using the human body model, a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

Operating Ratings

(1)

4.5V to 42V

Junction Temperature Range

-40°C to +125°C

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of

device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or

other conditions beyond those indicated in the recommended Operating Ratings is not implied. The recommended Operating Ratings

indicate conditions at which the device is functional and should not be operated beyond such conditions.

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