IR3871MTR1PBF International Rectifier, IR3871MTR1PBF Datasheet - Page 10

• 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

50mV/div
TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 7, VIN = 12V, VCC = 5V, Vout = 1.05V, Fs = 300kHz, T
unless otherwise specified
PHASE
i
VOUT
L
Figure 16: Thermal Image at VIN = 12V, I
8A (IR3871: 66
10V/div
Figure 14: Load Transient 0-4A
2A/div
o
C, Inductor: 58
o
C, PCB: 40
20µs/div
OUT
o
C)
=
50mV/div
Figure 17: Thermal Image at VIN = 19V, I
8A (IR3871: 71
10V/div
Figure 15: Load Transient 4-8A
2A/div
o
C, Inductor: 59
IR3871MPBF
A
= 25
o
C, PCB: 44
o
C, no airflow,
20µs/div
PHASE
VOUT
OUT
o
10
C)
i
=
L