°C to +125°C.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Operating Supply Voltage

(1)

3

6.5

V

Output Voltage (1)

For L4957V1.5/D1.5

•

1.47

1.455

1.5

1.5

1.53

1.545

V

V

For L4957V2.5/D2.5

•

2.45

2.425

2.5

2.5

2.55

2.575

V

V

Load regulation (1)

0.1A < IO < 4A

2

10

mV

Drain-Source ON

Resistance

•

200

300

m

Ω

Current Limiting

•

5.1

6.3

7.5

A

Short Circuit Current

•

1.8

A

Quiescent Current

•

0.5

2

mA

Ripple Rejection

60

75

dB

(1) GND connected to ground.

THERMAL DATA

Symbol

Parameter

TO220

D2PAK

Unit

Thermal Resistance Junction-case

Max.

2.5

3

°C/W

Thermal Resistance Junction-ambient

Max.

50

60

°C/W

Thermal Shutdown

Typ.

150

°C

Thermal Hysteresis

Typ.

20

°C

PIN FUNCTIONS

Pin N

° Name

Function

1

IN

Unregulated input voltage; this pin must be bypassed with a capacitor larger than 10

µF.

2

GND

To connect to Ground to get 1.5V or 2.5V output.

3

OUT

Regulated output voltage. A minimum bypass capacitor of 22

µF is required to insure stability.

-40

-20

0

20

40

60

80

100 120 140 160

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

Tj [

°C]

3V < Vin < 6.5V

Iout = 10mA

Figure 1: Line Regulation vs. Junction

Temperature

01234

5

-5

-4

-3

-2

-1

0

1

2

3

4

5

Iout [A]

Vin = 5V

Tj = 25

°C

(Pulsed technique has been used)

Vout = 1.5V

Figure 2: Load Regulation

L4957

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