IR3871MTR1PBF International Rectifier, IR3871MTR1PBF Datasheet - Page 9

• 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

20mV/div
TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 7, VIN = 12V, VCC = 5V, Vout = 1.05V, Fs = 300kHz, T
unless otherwise specified
5V/div
5V/div
PHASE
PGOOD
i
VOUT
VOUT
EN
PGOOD
SS
VOUT
SS
IOUT
L
1V/div
5V/div
(tested by shorting VOUT to PGND)
5V/div
Figure 12: Over Current Protection
Figure 10: DCM (I
1V/div
1V/div
2A/div
Figure 8: Startup
10A/div
500mV/div
OUT
= 0.1A)
10µs/div
5ms/div
1ms/div
20mV/div
5V/div
5V/div
1V/div
Figure 13: Over Voltage Protection
5V/div
5V/div
(tested by shorting FB to V
Figure 11: CCM (I
500mV/div
1V/div
Figure 9: Shutdown
5A/div
500mV/div
2A/div
IR3871MPBF
OUT
A
= 25
= 6A)
200µs/div
o
OUT
C, no airflow,
50µs/div
2µs/div
)
PGOOD
PGOOD
VOUT
VOUT
VOUT
PHASE
FB
EN
SS
9
i
i
L
L