IR3871MTR1PBF International Rectifier, IR3871MTR1PBF Datasheet - Page 4

• 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

Pin Description
NAME
NC
ISET
PGOOD
GND
FB
SS
NC
3VCBP
NC
VCC
PGND
PHASE
VIN
BOOT
FF
EN
NUMBER
4,17
10
11
12
13
14
15
16
1
2
3
5
6
7
8
9
I/O
LEVEL
5V
Reference
3.3V
3.3V
3.3V
5V
Reference
VIN
VIN
VIN +VCC
VIN
5V
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DESCRIPTION
No connection
Connecting resistor to PHASE pin sets over current trip point
Power good open drain output – pull up with a resistor to 3.3V
Bias return and signal reference
Inverting input to PWM comparator, OVP / PGood sense
Set soft start slew-rate with a capacitor to GND
No connection
LDO output. A minimum of 1.0 µF ceramic capacitor is required
No connection
Gate drive supply
Power return
Phase node (or switching node) of MOSFET half bridge
Input voltage for the system.
Bootstrapped gate drive supply – connect a capacitor to PHASE
Input voltage feed forward – sets on-time with a resistor to VIN
Enable
IR3871MPBF
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