LM2575

22

MOTOROLA ANALOG IC DEVICE DATA

THE LM2575–5.0 STEP–DOWN VOLTAGE REGULATOR WITH 5.0 V @ 1.0 A OUTPUT POWER CAPABILITY.

TYPICAL APPLICATION WITH THROUGH–HOLE PC BOARD LAYOUT

DC–DC Converter

Figure 35. Schematic Diagram of the LM2575–5.0 Step–Down Converter

Figure 36. Printed Circuit Board

Component Side

Figure 37. Printed Circuit Board

Copper Side

D1

1N5819

L1

330

µH

Output

2

4

Feedback

Unregulated

DC Input

+Vin = +7.0 V to +40 V

Cout

330

µF

/16 V

C1

100

µF

/50 V

LM2575–5.0

1

5

3ON/OFF

Gnd

+Vin

J1

Regulated Output

+Vout1 = 5.0 V @ 1.0 A

Gndin

Gndout

C1

–

100

µF, 50 V, Aluminium Electrolytic

C2

–

330

µF, 16 V, Aluminium Electrolytic

D1

–

1.0 A, 40 V, Schottky Rectifier, 1N5819

L1

–

330

µH, Tech 39: 77 458 BV, Toroid Core, Through–Hole, Pin 3 = Start, Pin 7 = Finish

NOTE:

Not to scale.

NOTE:

Not to scale.

+Vout1

+Vin

Gndin

Gndout

C1

L1

C2

D1

J1

U1 LM2575