FAN8303 Fairchild Semiconductor, FAN8303 Datasheet - Page 6

• Manufacturer Part Number: FAN8303
• Description: The FAN8303 is a monolithic, non-synchronous, stepdown (buck) regulator with internal power MOSFETs
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN8303 • Rev. 1.0.0
CH3
CH2
CH4
CH2
CH1
CH4
CH1
CH3
CH4
CH3
CH2
CH1
Typical Performance Characteristics
V
Figure 8. Load Transient Response (0.5A to 1.5A)
IN
=
CH1(VO) : 2V, 1ms/div.
CH2(VIN) : 4V, 1ms/div.
CH3(SW) : 6V, 1ms/div.
CH4(Io) : 1A, 1ms/div.
12V,
△Vo = 240mV
CH1(VO) : 2V, 500µs/div.
CH2(EN) : 4V, 500µs/div.
CH3(SW) : 6V, 500µs/div.
CH4(IL) : 1A, 500µs/div.
Figure 4. EN Startup with 2A Load
Figure 6. Power-on with 2A Load
V
OUT
= 5V, L1 = 15μH, C
Slew Rate( 2.5A/µs)
CH1(VO) : 5V offset
CH2(COMP) : 300mV, 50µs/div.
CH3(SW) : 10V, 50µs/div.
CH4(Io) : 1A, 50µs/div.
IN
200mV, 50µs/div.
= 10μF, C
OUT
= 22μF, T
6
CH1
CH2
CH4
CH3
CH4
CH3
CH2
CH2
CH3
CH4
CH1
CH1
A
Figure 9. Load Transient Response (1.5A to 0.5A)
= +25
Slew Rate( 2.5A/µs)
△Vo = 204mV
o
C, unless otherwise noted.
Figure 5. EN Turn-off with 2A Load
Figure 7. Power-off with 2A Load
CH1(VO) : 5V offset
CH2(COMP) : 300mV, 50µs/div.
CH3(SW) : 10V, 50µs/div.
CH4(Io) : 1A, 50µs/div.
CH1(VO) : 2V, 200µs/div.
CH2(VIN) : 4V, 200µs/div.
CH3(SW) : 6V, 200µs/div.
CH4(Io) : 1A, 200µs/div.
CH1(VO) : 2V, 50µs/div.
CH2(EN) : 4V, 50µs/div.
CH3(SW) : 6V, 50µs/div.
CH4(IL) : 1A, 50µs/div.
200mV, 50µs/div.
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