LM3822 datasheet(3/12 Pages) NSC

3 / 12 page

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Absolute Maximum Supply Voltage

5.5V

Power Dissipation

(Note 2)

ESD Susceptibility (Note 3)

1.5 kV

Sense Current (peak, for 200 msec) (Note 4)

10A

Sink Current for PWM pin

1mA

Maximum Junction Temperature

150˚C

Storage Temperature

−65˚C to +150˚C

Lead Temperature (Soldering, 10 sec)

260˚C

Operating Ratings (Note 1)

Input Voltage

2.0V to 5.25V

Sense Current (continuous) (Note 4)

Junction Temperature Range

−40˚C to +85˚C

Electrical Characteristics Typical numbers are at 25˚C and represent the most likely parametric norm.

Specifications in standard type face are for T

J = 25˚C and those with boldface type apply over full operating temperature

ranges.

LM3822-1.0

SENSE+V

DD = 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

ACC

Average Current Accuracy

(Note 7)

1.0A current

1.0

0.98 / 0.96

A (min)

1.02 / 1.04

A (max)

Effective Output Noise (rms)

LM3822-2.0

SENSE+V

DD = 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

ACC

Average Current Accuracy

(Note 7)

2.0A current (Note 8)

2.0

1.94 / 1.90

A (min)

2.06 / 2.10

A (max)

Effective Output Noise (rms)

Common Device Parameters

Unless otherwise specified, V

DD = 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is

0.1 µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

Quiescent Current

Normal Mode, SD = high

µA

150

µA (max)

Quiescent Current

Shutdown Mode, SD = low

1.8

µA

µA (max)

RES

PWM Resolution

0.1

Sampling Time

ms (min)

ms (max)

Frequency of PWM Waveform

12.5

Hz (min)

Hz (max)

Threshold High Level for SD

1.3

1.8

V (min)

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