IRF7468PBF_15 Datasheet, PDF (5/8 Pages) International Rectifier – High Frequency Buck Converters for Computer Processor Power

Fig 6. On-Resistance Vs. Drain Current
IRF7468PbF
10.0
8.0
6.0
4.0
2.0
0.0
25
50
75
100
125
150
T_C , Case Temperature ( °C)
V_DS
V_GS
R_G
R_D
D.U.T.
4.5V
Pulse Width ≤ 1 µs
Duty Factor ≤ 0.1 %
+_-VDD
Fig 10a. Switching Time Test Circuit
V_DS
90%
10%
V_GS
t_d(on) t_r
t_d(off) t_f
Fig 10b. Switching Time Waveforms
100
D = 0.50
10
0.20
0.10
0.05
1
0.02
0.01
P_DM
0.1
SINGLE PULSE
(THERMAL RESPONSE)
t₁
t₂
Notes:
1. Duty factor D = t₁ / t ₂
0.01
0.00001
0.0001
0.001
0.01
2. Peak T _J = P _DM x Z _thJA + T_A
0.1
1
10
100
t₁, Rectangular Pulse Duration (sec)
Fig 10. Maximum Effective Transient Thermal Impedance, Junction-to-Case
www.irf.com
5