IRDC3710-QFN International Rectifier, IRDC3710-QFN Datasheet - Page 7

• Manufacturer Part Number: IRDC3710-QFN
• Description: BOARD EVAL SYNC BUCK CONTROLLER
• Manufacturer: International Rectifier

Specifications of IRDC3710-QFN

• Lead Free Status / Rohs Status: Supplier Unconfirmed

TYPICAL OPERATING DATA
(Circuit of Figure 18, VCC = 3.3V, V5 = 5V, V
Page 7 of 20
Figure 1. Feedforward Resistance vs Switching Freq:
Figure 2. Switching Frequency vs Output Current
Figure 3. Output Voltage Regulation versus Input
1.10150
1.10100
1.10050
1.10000
1.09950
1.09900
1.09850
1.09800
Rff 0.5 fsw
Rff 0.5 fsw
Rff 1 fsw
Rff 1 fsw
Rff 1.5 fsw
Rff 1.5 fsw
Rff 2 fsw
Rff 2 fsw
Rff 2.5 fsw
Rff 2.5 fsw
Rff 3 fsw
Rff 3 fsw
Rff 3.5 fsw
Rff 3.5 fsw
Rff 4 fsw
Rff 4 fsw
Rff 4.5 fsw
Rff 4.5 fsw
Rff 5 fsw
Rff 5 fsw
350
300
250
200
150
100
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
(
50
1000000
1000000
12Vin@0C
,
,
,
,
,
,
,
,
,
,
1000
1000
000000
000000
0
,
,
,
,
,
,
,
,
,
,
Voltage and Ambient Temperature
)
)
)
)
)
)
)
)
)
)
0
0
200
200
0
0
)
)
)
)
)
)
)
)
)
)
200000
200000
0.5V V
V
V
OUT
OUT
2
2
= 0.5V
= 0.5V
4
4
OUT
Switching Frequency (KHz)
Switching Frequency (KHz)
12Vin@65C
6
6
step, FCCM = HIGH.
8
Switching Frequency
Switching Frequency
Output Current(A)
V
V
8
OUT
OUT
Output Current (A)
Freq vs Load
10 12 14 16 18 20 22 24
10 12
fsw
fsw
= 5V
= 5V
19Vin@0C
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14
16
18
1000000
1000000
1000
1000
19Vin@65C
20
IN
22
= 12.6V, Unless otherwise noted.)
24
IR Confidential
Figure 6. Charge Pump Efficiency Comparison:
90
88
86
84
82
80
78
7.4
7.2
6.8
6.6
6.4
6.2
7
6
90
88
86
84
82
80
78
76
IRF8721/8721, 0.82uH (4.2mOhm DCR)
0
0
19Vin
Fs =300kHz; Ccpo=1uF
0
Figure 5. Charge Pump Regulation
5
2
Figure 4. System Efficiency
1.25Vout, 12.6Vin, 300kHz,
5V Drive
Ploss-5V Drive
2
4
10
12Vin
6
IR3710MTRPBF
4
Output Current(A)
15
8
Gate Charge (nC)
Output Current(A)
10 12 14 16 18 20 22 24
20
6
Ploss-19Vin
25
Fs=1.34MHz ;Ccpo=1uF
Enhanced Gate
Ploss-Enhanced Gate
8
30
10
35
4/26/10
Ploss-12Vin
40
12
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
45