FAN5354 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FAN5354

3MHz, 3A Synchronous Buck Regulator

Fairchild Semiconductor 

Typical Characteristics

Unless otherwise specified, VIN=5V, VOUT=1.2V, circuit of Figure 1, and components per Table 1.

V

EN

VOUT

V

PG

I

supply

V =V

IN EN

VOUT

V

PG

I

supply

Figure 20. Soft-Start, EN Voltage Raised After VIN=5V,

ILOAD=0, 100µs/div.

Figure 21. Soft-Start, EN Pin Tied to VCC

ILOAD=0, 1ms/div.

Figure 22. Soft-Start, EN Pin Raised After VIN=5V

RLOAD=400mΩ, COUT=100µF, 100µs/div.

Figure 23. Soft-Start, EN Pin Tied to VCC

RLOAD=400mΩ, COUT=100µF, 1ms/div.

Figure 24. Line Transient Response in PWM Mode,

10µs/div.

Figure 25. Line Transient Response in PFM Mode,

10µs/div.

© 2009 Fairchild Semiconductor Corporation

FAN5354 • Rev. 1.0.5

8

www.fairchildsemi.com

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