IR3871MTR1PBF International Rectifier, IR3871MTR1PBF Datasheet - Page 7

• Manufacturer Part Number: IR3871MTR1PBF
• Description: IC REG SYNC BUCK 8A 17-QFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck)r

Specifications of IR3871MTR1PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 ~ 5 V
• Current - Output: 8A
• Frequency - Switching: Adj to 1MHz
• Voltage - Input: 3 ~ 26 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 17-PowerVQFN
• Part Status: Active
• Package: PQFN / 5 x 6
• Circuit: Single Output
• Iout (a): 8
• Switch Freq (khz): 0 - 1000
• Input Range (v): 3.0 - 26
• Output Range (v): 0.5 - 12
• Ocp Otp Uvlo Pre-bias Soft Start And: Constant On-Time + OVP no OTP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: IR3871MTR1PBFTR

TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 7, VIN = 12V, VCC = 5V, Vout = 1.05V, Fs = 300kHz, TA = 25
unless otherwise specified
95%
85%
75%
65%
55%
45%
35%
1.052
1.051
1.050
1.049
1.048
350
300
250
200
150
100
Figure 1. Efficiency vs. Output Current for
Figure 3. Switching Frequency vs. Output
50
Figure 5. Output Voltage Regulation vs.
0
0.01
0
EFF @ 8V
0
1
1
EFF @ 12V
IN
Output Current
2
2
V
Output Current (A)
0.1
V
OUT
Output Current (A)
Output Current (A)
Current
OUT
3
3
= 1.05V
@ 19V
IN
EFF @ 19V
4
4
IN
V
5
5
1
OUT
V
IN
OUT
@ 8V
6
6
@ 12V
IN
7
7
IN
10
8
8
1200
1000
800
600
400
200
100%
1.052
1.051
1.050
1.049
1.048
Figure 6. Output Voltage Regulation vs.
0
90%
80%
70%
60%
50%
40%
Figure 2. Efficiency vs. Output Current for
200
0.01
6
EFF @ 3.3V
Input Voltage at I
Figure 4. Frequency vs. R
8
400
EFF @ 1.05V
OUT
10
Frequency (kHz)
Output Current (A)
VIN = 12V
0.1
Input Voltage (V)
EFF @ 1.5V
12
IR3871MPBF
600
OUT
OUT
14
5.0 Vout
4.0
3.0
2.0
1.0
= 8A
OUT
1
800
16
o
C, no airflow,
FF
4.5
3.5
2.5
1.5
0.5
18
7
1000
10
20