L4957AD3.3 datasheet(3/7 Pages) STMICROELECTRONICS

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ELECTRICAL CHARACTERISTICS (Tj =25

°C, VIN = 5V, unless otherwise specified).

• = Specifications referred to T

J from 0

°C to +125°C.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VIN

Operating Supply Voltage

Output Voltage

3.15V < VIN < 5.25V; IO = 0.1A

1.485

1.5

1.515

VIN = 3.3V

±5%; 0.1A < IO <5A

•

1.47

1.5

1.53

VIN = 3.3V

±5% IO = 0.1A

VIN =5V

±5%

1.782

1.8

1.818

VIN = 3.3V

±5% (0.1A < IO < 45A)

VIN =5V

±5%

0.1A < IO <5A

• 1.764

1.8

1.836

VIN = 3.3V

±5% IO = 0.1A

VIN =5V

±5%

2.475

2.5

2.525

VIN = 3.3V

±5% (0.1A < IO < 2.2A)

VIN =5V

±5%

0.1A < IO <5A

•

2.45

2.5

2.55

VIN =5V

±5%

IO = 0.1A

3.267

3.3

3.333

VIN =5V

±5%

0.1A < IO <5A

• 3.234

3.3

3.366

RDSON

Drain-Source ON

Resistance

•

300

Ω

Current Limiting

•

5.1

6.3

7.5

Quiescent Current

3V < VIN < 14V

•

0.6

Ripple Rejection

f = 120Hz, IO =1A

VIN =5V

∆VIN =2VPP

THERMAL DATA

Symbol

Parameter

TO220

D2PAK

Unit

Rth j-case

Thermal Resistance Junction-case

Max.

2.5

°C/W

Rth j-amb

Thermal Resistance Junction-ambient

Max.

°C/W

Thermal Shutdown

Typ.

150

°C

Thermal Hysteresis

Typ.

°C

-40

-20

100 120 140 160

0.5

1.5

2.5

3.5

4.5

Tj [

°C]

3V < Vin < 6.5V

Iout = 10mA

Figure 1: Line Regulation vs. Junction

Temperature

012345

-5

-4

-3

-2

-1

Iout [A]

Vin = 5V

Tj = 25

°C

(Pulsed technique has been used)

Vout = 1.5V

Figure 2: Load Regulation

L4957A

3/7

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