IR3476MTRPBF International Rectifier, IR3476MTRPBF Datasheet - Page 11
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IR3476MTRPBF
Manufacturer Part Number
IR3476MTRPBF
Description
IC BUCK SYNC ADJ 12A PQFN
Manufacturer
International Rectifier
Series
SupIRBuck™r
Type
Step-Down (Buck), PWM - Current Moder
Datasheet
1.IR3476MTRPBF.pdf
(21 pages)
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
TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 4, VIN = 12V, VCC = 5V, VOUT = 1.05V, Fs = 300kHz, T
otherwise specified.
50mV/div 10V/div 5A/div
5V/div 10V/div 500mV/div 5A/div
VOUT
PHASE
iL
FCCM
PHASE
VOUT
iL
Figure 21: Thermal Image at VIN = 12V, I
(IR3476: 98
11
Figure 19: DCM/FCCM Transition
Figure 17: Load Transient 0‐8A
February 16, 2011 | ADVANCED DATASHEET | V1.8 | PD97603
o
C, Inductor: 58
o
C, PCB: 47
20µs/div
10µs/div
OUT
o
C)
= 12A
12A 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
(IR3476: 104
Figure 20: FCCM/DCM Transition
Figure 18: Load Transient 4‐12A
o
C, Inductor: 61
A
= 25
TM
o
C, no airflow, unless
o
C, PCB: 50
IR3476
20µs/div
5µs/div
OUT
o
= 12A
C)
PHASE
FCCM
VOUT
PHASE
VOUT
iL
iL