IR3476MTRPBF International Rectifier, IR3476MTRPBF Datasheet - Page 5

• Manufacturer Part Number: IR3476MTRPBF
• Description: IC BUCK SYNC ADJ 12A PQFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of IR3476MTRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 V ~ 12 V
• Current - Output: 12A
• Frequency - Switching: Up to 750kHz
• Voltage - Input: 3 V ~ 27 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: *
• Primary Input Voltage: 27V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 12A
• No. Of Pins: 17
• Operating Temperature Range: -40°C To +125°C
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Part Status: Preferred
• Package: PQFN / 5 x 6
• Circuit: Single Output
• Iout (a): 12
• Switch Freq (khz): 0 - 750
• Input Range (v): 3.0 - 27
• Output Range (v): 0.5 - 12
• Ocp Otp Uvlo Pre-bias Soft Start And: Constant On-Time + PGOOD + EN + Temp Comp OCP
• Digital Home Media: Yes
• Mobile Computing: Yes
• Industrial 24v Input: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN DESCRIPTIONS
PIN #
4, 17
10
11
12
13
14
15
16
1
2
3
5
6
7
8
9
5
PIN NAME
PGOOD
3VCBP
PHASE
PGND
FCCM
BOOT
February 16, 2011 | ADVANCED DATASHEET | V1.8 | PD97603
GND
ISET
VCC
VIN
NC
NC
EN
FB
SS
FF
I/O LEVEL
Reference
Reference
VIN + VCC
3.3V
3.3V
3.3V
3.3V
VIN
VIN
VIN
5V
5V
5V
‐
‐
Forced Continuous Conduction Mode (CCM). Ground this pin to enable diode
emulation mode or discontinuous conduction mode (DCM). Pull this pin to 3.3V
to operate in CCM under all load conditions.
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.
Soft start/shutdown. This pin provides user programmable soft‐start function.
Connect an external capacitor from this pin to GND to set the startup time of the
output voltage. The converter can be shutdown by pulling this pin below 0.3V.
‐
For internal LDO. Bypass with a 1.0µF capacitor to GND.
‐
VCC input. Gate drive supply. A minimum of 1.0µF ceramic capacitor is required.
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 pin to turn on and off the device. Use two external resistors to set the
turn on threshold (see Electrical Specifications) for input voltage monitoring.
12A Highly Integrated SupIRBuck
PIN DESCRIPTION
TM
IR3476