FAN5354_11 Datasheet, PDF (8/14 Pages) Fairchild Semiconductor – 3MHz, 3A Synchronous Buck Regulator

Typical Characteristics
Unless otherwise specified, VIN=5V, VOUT=1.2V, circuit of Figure 1, and components per Table 1.
V
EN
V_OUT
V
PG
I
supply
V =V
IN EN
V_OUT
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
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