FDMF8705 Fairchild Semiconductor, FDMF8705 Datasheet - Page 6

• Manufacturer Part Number: FDMF8705
• Description: IC MODULE DRIVER/FET POWER88-56
• Manufacturer: Fairchild Semiconductor
• Type: Step-Down (Buck)r

Specifications of FDMF8705

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Current - Output: 18A
• Frequency - Switching: 500kHz
• Voltage - Input: 12V
• Operating Temperature: -55°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 56-MLP
• Power - Output: 6.25W
• Supply Voltage (min): 6.4 V
• Supply Current: 8 mA
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: FDMF8705TR

FDMF8705 Rev. C
Figure 14. DISB Threshold Voltage vs. Driver Supply Voltage
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.10
1.05
1.00
0.95
3.3
3.2
3.1
3.0
2.9
2.8
-50
6
0.3
V
V
V
V
V
I
f
OUT
SW
CIN
IL
IH
IN
OUT
Figure 10. Power Loss vs. Output Inductance
= 12V
= 300KHz
7
Figure 12. Supply Current vs. Temperature
= 12V
-25
= 18A
= 1.3V
0.4
8
0
0.5
IQ_OFF
9
Driver Supply Voltage, V
Output Inductance, uH
25
Temperature,
0.6
10
IQ
50
11
0.7
o
C
75
12
0.8
100
13
0.9
125
14
150
1.0
15
6
20
16
12
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
2.8
8
4
0
2.0
1.9
1.8
1.7
1.6
1.5
1.4
0
-50
6
V
V
Figure 15. DISB Threshold Voltage vs. Temperature
CIN
CIN
Figure 11. Supply Current vs. Supply Voltage
= 12V
= 12V
7
-25
Figure 13. Supply Current vs. Frequency
100
8
0
V
IH
9
25
200
Supply Voltage, V
Frequency, KHz
Temperature,
10
50
11
V
IL
300
o
C
75
12
100
PWM=DISB=5V
PWM=DISB=0V
www.fairchildsemi.com
13
400
125
14
500
150
15