XR79203 Datasheet, PDF (8/19 Pages) Exar Corporation – 40V, 3A Synchronous Step-Down

XR79203
Typical Performance Characteristics (Continued)
T_A = 25°C, V_IN = 24V, V_OUT = 3.3V, I_OUT = 3A, f = 500kHz, unless otherwise specified. Schematic shown in Figure 27.
SW
VOUT
13mVp-p
AC coupled 20MHz
SW
VOUT
72mVp-p
AC coupled 20MHz
IOUT
Figure 14. Steady State CCM, I_OUT = 3A
IOUT
Figure 15. Steady State DCM, I_OUT = 0A
VIN
EN
VOUT
IOUT
4ms/div
Figure 16. Power Up, I_OUT = 3A
VIN
EN
VOUT
IOUT
4ms/div
Figure 17. Power Up, I_OUT = 0A
SW
VOUT
AC coupled 20MHz
112mV
160mV
IOUT
Di/Dt = 2.5A/us
20 us/div
Figure 18. Load Step, CCM, 0A-1.5A-0A
SW
VOUT
AC coupled 20MHz
180mV
172mV
IOUT
Di/Dt = 2.5A/us
40 us/div
Figure 19. Load Step, DCM/CCM, 0.05A-1.5A-0.05A
REV1B
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