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IR3870MBF Datasheet(PDF) 7 Page - International Rectifier

Part # IR3870MBF
Description  10A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
PDF  20 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3870MBF Datasheet(HTML) 7 Page - International Rectifier

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IR3870MBF
TYPICAL OPERATING DATA (25oC)
(Circuit of Figure 15, VCC = 3.3V, V5 = 5V, V
IN = 12.6V, F = 500kHz Unless otherwise noted)
Switching Frequency
1000000
000000
Rff 0.5 fsw
,
()
Rff 1 fsw
,
()
Rff 1.5 fsw
,
()
Rff 2 fsw
,
()
Rff 2.5 fsw
,
()
Rff 3 fsw
,
()
Rff 3.5 fsw
,
()
Rff 4 fsw
,
()
Rff 4.5 fsw
,
()
Rff 5 fsw
,
()
1000000
200000
fsw
Switching Frequency (KHz)
200
1000
0
1000
VOUT = 0.5V
VOUT = 5V
Switching Frequency
1000000
000000
Rff 0.5 fsw
,
()
Rff 1 fsw
,
()
Rff 1.5 fsw
,
()
Rff 2 fsw
,
()
Rff 2.5 fsw
,
()
Rff 3 fsw
,
()
Rff 3.5 fsw
,
()
Rff 4 fsw
,
()
Rff 4.5 fsw
,
()
Rff 5 fsw
,
()
1000000
200000
fsw
Switching Frequency (KHz)
200
1000
0
1000
VOUT = 0.5V
VOUT = 5V
Figure 2. Switching Frequency Vs Output Current
Figure 1. Feedforward Resistance Vs Switching
Frequency: 0.5V V
OUT step
Figure 3. On-Time Variation in DCM:
V
IN = 12V, VOUT =1.1V, RFF = 180kOhm
0
50
100
150
200
250
300
350
400
450
500
02
4
6
8
10
12
Output Current (A)
Figure 4. On-Time Variation in CCM:
V
IN = 12V, VOUT =1.1V, RFF = 180kOhm
322
324
326
328
330
332
334
336
0
25
50
75
100
125
Temperature (C)
311
311.5
312
312.5
313
313.5
314
314.5
315
0
25
50
75
100
125
Temperature (C)



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