LM2722 datasheet(5/8 Pages) NSC

5 / 8 page

Electrical Characteristics (Continued)

VCC = CBOOT = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T

A =

J = +25˚C. Limits appearing in boldface type apply over the entire operating temperature range.

Symbol

Parameter

Condition

Min

Typ

Max

Units

leak_EN

SYNC_EN Pin Leakage

Current

EN=5V

−2

µA

EN=0V

−2

on_min

Minimum Positive Input

Pulse Width

(Note 4)

off_min

Minimum Negative Input

Pulse Width

(Note 5)

IH_PWM

PWM_IN High Level Input

Voltage

When PWM_IN pin goes

high from 0V

2.4

IL_PWM

PWM_IN Low Level Input

Voltage

When PWM_IN pin goes

low from 5V

0.8

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating ratings are conditions under which the device operates

correctly. Operating Ratings do not imply guaranteed performance limits.

Note 2: Maximum allowable power dissipation is a function of the maximum junction temperature, TJMAX, the junction-to-ambient thermal resistance, θJA, and the

ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PMAX =(TJMAX-TA)/ θJA. The junction-to-

ambient thermal resistance,

θJA, for the LM2722, it is 172˚C/W. For a TJMAX of 150˚C and TA of 25˚C, the maximum allowable power dissipation is 0.7W.

Note 3: ESD machine model susceptibility is 100V.

Note 4: If after a rising edge, a falling edge occurs sooner than the specified value, the IC may intermittently fail to turn on the bottom gate when the top gate is

off. As the falling edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.

Note 5: If after a falling edge, a rising edge occurs sooner than the specified value, the IC may intermittently fail to turn on the top gate when the bottom gate is

off. As the rising edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.

Timing Diagram

20028903

LM2722 Datasheet(PDF) 5 Page - National Semiconductor (TI)

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