XR79203 Datasheet, PDF (6/19 Pages) Exar Corporation – 40V, 3A Synchronous Step-Down

XR79203
Typical Performance Characteristics
T_A = 25°C, V_IN = 24V, V_OUT = 3.3V, I_OUT = 3A, f = 500kHz, unless otherwise specified. Schematic shown in Figure 27.
3.350
3.340
3.330
3.320
3.310
3.300
3.290
3.280
3.270
3.260
3.250
0
0.5
1
1.5
2
2.5
3
IOUT (A)
Figure 3. Load Regulation
3.350
3.340
3.330
3.320
3.310
3.300
3.290
3.280
3.270
3.260
3.250
5
10
15
20
25
30
35
40
VIN(V)
Figure 4. Line Regulation
1,000
900
800
700
600
500
400
300
200
100
0
0
Calculated
Typical
10
20
30
40
50
60
70
RON (kΩ)
Figure 5. t_ON vs. R_ON
800
700
600
500
400
300
200
100
5
Calculated
Typical
10
15
20
25
30
35
40
VIN (V)
Figure 6. t_ON vs. V_IN, R_ON = 14kΩ
800
700
600
500
400
300
200
100
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
IOUT (A)
Figure 7. Switching Frequency vs. I_OUT
800
700
600
500
400
300
200
100
0
5
10
15
20
25
30
35
40
VIN (V)
Figure 8. Switching Frequency vs. V_IN
REV1B
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