LM2594 Просмотр технического описания (PDF) - ON Semiconductor

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производитель

LM2594

0.5 A, Step-Down Switching Regulator

ON Semiconductor 

10 V

A

0

0.8 A

B 0.4 A

0

0.8 A

C 0.4 A

0

D

LM2594

TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 16)

2 ms/div

Figure 14. Switching Waveforms

100 mV

Output

Voltage 0

Change

- 100 mV

0.5 A

Load

Current

0.1 A

0

100 ms/div

Figure 15. Load Transient Response

Vout = 5 V

A: Output Pin Voltage, 10 V/div

B: Switch Current, 0.4 A/div

C: Inductor Current, 0.4 A/div, AC−Coupled

D: Output Ripple Voltage, 50 mV/div, AC−Coupled

Horizontal Time Base: 2.0 ms/div

8.5 V - 40 V

Unregulated

DC Input

Adjustable Output Voltage Versions

Feedback

Vin

LM2594

4

L1

7

Output

100 mH

Cin

100 mF

6 GND

8

5 ON/OFF

D1

1N5822

Cout

220 mF

Vout

5.0 V/0.5 A

CFF

R2

Load

R1

ǒ Ǔ Vout + Vref 

1.0

) 

R2

R1

ǒ Ǔ R2 + R1 VVoreuft  1.0

Where Vref = 1.23 V, R1

between 1.0 k and 5.0 k

Figure 16. Typical Test Circuit

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