TJ4940S-1.2 参数 Datasheet PDF下载

1A Ultra Low Dropout Linear Regulator

ELECTRICAL CHARACTERISTICS

(Note 1)

TJ4940

Limits in standard typeface are for TJ=25ºC, and limits in

boldface type

apply over the

full operating temperature range.

Unless otherwise specified: V

IN(Note 2)

= V

O(NOM)

+ 1 V, I

L

= 10 mA, C

IN

= 10 uF, C

OUT

= 10 uF, V

EN

= V

IN

- 0.3 V

PARAMETER

Output Voltage Tolerance

Line Regulation

(Note 1)

Load Regulation

(Note 1, 2)

SYMBOL

V

O

ΔV

LINE

ΔV

LOAD

TEST CONDITION

V

OUT

+1 V < V

IN

< 5.5 V

V

OUT

+1 V < V

IN

< 5.5 V

10 mA < I

L

< 1 A

I

L

= 100 mA

Dropout Voltage

(Note 3)

V

DROP

I

L

= 1 A

I

L

= 100 mA

Ground Pin Current

(Note 4)

I

GND

I

L

= 1 A

Power Supply Rejection Ratio

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

PSRR

T

SD

ΔT

SD

f = 1kHz

-

-

-

-

-

0.40

55

165

10

-

-

400

0.40

MIN.

-2

-3

-

-

-

TYP.

0

0.15

0.20

45

MAX.

2

3

-

0.40

0.50

0.60

55

65

500

600

0.6

1.0

0.6

1.0

-

-

-

UNIT

%

%/V

%

mV

mA

dB

ºC

ºC

Note 1. Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.

Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current.

Note 2. Regulation is measured at constant junction temperature by using a 10ms current pulse. Devices are tested for load regulation in the

load range from 10mA to 1A.

Note 3. Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.

Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the dropout voltage is

nothing but the input to output differential, since the minimum input voltage is 2.5V

Note 4. Ground current, or quiescent current, is the difference between input and output currents. It's defined by I

GND1

= I

IN

- I

OUT

under the

given loading condition. The total current drawn from the supply is the sum of the load current plus the ground pin current.

Jul. 2011 – Preliminary

5/8

HTC