LT1121CS8 datasheet(3/16 Pages) LINER

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LT1121/LT1121-3.3/LT1121-5

1121fe

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Regulated Output Voltage

LT1121-3.3

VIN = 3.8V, IOUT = 1mA, TJ = 25°C

3.250

3.300

3.350

(Note 4)

4.3V < VIN < 20V, 1mA < IOUT < 150mA

●

3.200

3.300

3.400

LT1121-5

VIN = 5.5V, IOUT = 1mA, TJ = 25°C

4.925

5.000

5.075

6V < VIN < 20V, 1mA < IOUT < 150mA

●

4.850

5.000

5.150

LT1121 (Note 5)

VIN = 4.3V, IOUT = 1mA, TJ = 25°C

3.695

3.750

3.805

4.8V < VIN < 20V, 1mA < IOUT < 150mA

●

3.640

3.750

3.860

Line Regulation

LT1121-3.3

ΔVIN = 4.8V to 20V, IOUT = 1mA

●

1.5

LT1121-5

ΔVIN = 5.5V to 20V, IOUT = 1mA

●

1.5

LT1121 (Note 5)

ΔVIN = 4.3V to 20V, IOUT = 1mA

●

1.5

Load Regulation

LT1121-3.3

ΔILOAD = 1mA to 150mA, TJ = 25°C–12

– 25

ΔILOAD = 1mA to 150mA

●

–20

– 40

LT1121-5

ΔILOAD = 1mA to 150mA, TJ = 25°C–17

– 35

ΔILOAD = 1mA to 150mA

●

–28

– 50

LT1121 (Note 5)

ΔILOAD = 1mA to 150mA, TJ = 25°C–12

– 25

ΔILOAD = 1mA to 150mA

●

–18

– 40

Dropout Voltage

ILOAD = 1mA, TJ = 25°C

0.13

0.16

(Note 6)

ILOAD = 1mA

●

0.25

ILOAD = 50mA, TJ = 25°C

0.30

0.35

ILOAD = 50mA

●

0.50

ILOAD = 100mA, TJ = 25°C

0.37

0.45

ILOAD = 100mA

●

0.60

ILOAD = 150mA, TJ = 25°C

0.42

0.55

ILOAD = 150mA

●

0.70

Ground Pin Current

ILOAD = 0mA

●

μA

(Note 7)

ILOAD = 1mA

●

120

μA

ILOAD = 10mA

●

350

500

μA

ILOAD = 50mA

●

1.5

2.5

ILOAD = 100mA

●

4.0

7.0

ILOAD = 150mA

●

7.0

14.0

Adjust Pin Bias Current (Notes 5, 8)

TJ = 25°C

150

300

Shutdown Threshold

VOUT = Off to On

●

1.2

2.8

VOUT = On to Off

●

0.25

0.75

Shutdown Pin Current (Note 9)

VSHDN = 0V

●

610

μA

Quiescent Current in Shutdown (Note 10)

VIN = 6V, VSHDN = 0V

●

μA

Ripple Rejection

VIN – VOUT = 1V (Avg), VRIPPLE = 0.5VP-P,50

fRIPPLE = 120Hz, ILOAD = 0.1A

Current Limit

VIN – VOUT = 7V, TJ = 25°C

200

500

Input Reverse Leakage Current

VIN = –20V, VOUT = 0V

●

1.0

Reverse Output Current (Note 11)

LT1121-3.3

VOUT = 3.3V, VIN = 0V

μA

LT1121-5

VOUT = 5V, VIN = 0V

μA

LT1121 (Note 5)

VOUT = 3.8V, VIN = 0V

μA

The

● denotes specifications which apply over the operating temperature

range, otherwise specifications are at TA = 25°C.

Note 2: The shutdown pin input voltage rating is required for a low

impedance source. Internal protection devices connected to the shutdown

pin will turn on and clamp the pin to approximately 7V or – 0.6V. This

range allows the use of 5V logic devices to drive the pin directly. For high

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

ELECTRICAL CHARACTERISTICS

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