LM3814MX-1.0 datasheet(3/14 Pages) NSC

부품명	LM3814MX-1.0

상세설명	Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output

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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

1 mA

Voltage on Pin 5

5.25V

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)

7A

Junction Temperature Range

−40˚C to +125˚C

Electrical Characteristics

LM3814-1.0, LM3815-1.0

V

DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is 0.1µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

I

ACC

Average Current Accuracy

(Note 7)

at 0.9A current

0.9

A

0.868 / 0.850

A (min)

0.932 / 0.950

A (max)

e

n

Effective Output Noise (rms)

12

mA

LM3814-7.0, LM3815-7.0

V

DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is 0.1µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

I

ACC

Average Current Accuracy

(Note 7)

at 2.5A current (Note 8)

2.5

A

2.350 / 2.288

A (min)

2.650 / 2.712

A (max)

e

n

Effective Output Noise (rms)

120

mA

Common Device Parameters

Unless otherwise specified, V

DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is

0.1µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

I

Q1

Quiescent Current

Normal Mode, SD = high

100

µA

160

µA (max)

I

Q2

Quiescent Current

Shutdown Mode, SD = low

2.5

µA

10

µA (max)

D

RES

PWM Resolution

0.8

%

t

S

Sampling Time

6

ms

4

ms (min)

10

ms (max)

f

P

Frequency of PWM Waveform

160

Hz

100

Hz (min)

250

Hz (max)

V

TH

Threshold High Level for SD

1.2

V

1.8

V (min)

V

TL

Threshold Low Level for SD

1.3

V

0.7

V (max)

V

OH

Logic High Level for PWM

Load current = 1mA, 2V

≤ V

DD

≤

5.25V

V

DD − 0.05

V

DD − 0.2

V

V (min)

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