IR3473MTRPBF International Rectifier, IR3473MTRPBF Datasheet - Page 11

• Manufacturer Part Number: IR3473MTRPBF
• Description: IC BUCK SYNC ADJ 6A PQFN
• Manufacturer: International Rectifier
• Series: SupIRBuck™r
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of IR3473MTRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 V ~ 12 V
• Current - Output: 6A
• 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: 6A
• 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 / 4 x 5
• Circuit: Single Output
• Iout (a): 6
• 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

TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 4, VIN = 12V, VCC = 5V, VOUT = 1.05V, Fs = 300kHz, T
otherwise specified.
5V/div 10V/div 500mV/div 5A/div
50mV/div 10V/div 2A/div
VOUT
PHASE
iL
FCCM
PHASE
VOUT
iL
Figure 21: Thermal Image at VIN = 12V, I
(IR3473: 64
11
Figure 19: DCM/FCCM Transition
Figure 17: Load Transient 0‐3A
February 16, 2011 | ADVANCED DATASHEET | V1.9 | PD97601
o
C, Inductor: 48
o
C, PCB: 37
10µs/div
100µs/div
OUT
o
C)
= 6A
6A Highly Integrated SupIRBuck
50mV/div 10V/div 5A/div
2V/div 10V/div 500mV/div 5A/div
Figure 22: Thermal Image at VIN = 19V, I
(IR3473: 67
Figure 20: FCCM/DCM Transition
Figure 18: Load Transient 3‐6A
o
C, Inductor: 49
A
= 25
TM
o
C, no airflow, unless
o
C, PCB: 38
IR3473
100µs/div
5µs/div
OUT
o
C)
= 6A
PHASE
PHASE
VOUT
FCCM
VOUT
iL
iL