IR3476MTRPBF International Rectifier, IR3476MTRPBF Datasheet - Page 9

• 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

TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 4, VIN = 12V, VCC = 5V, VOUT = 1.05V, Fs = 300kHz, T
unless otherwise specified.
1.060
1.058
1.056
1.054
1.052
1.050
95%
85%
75%
65%
55%
45%
400
350
300
250
200
150
100
Figure 5: Efficiency vs. Load Current for VOUT = 1.05V
50
0
0.01
Figure 7: Switching Frequency vs. Load Current
0
0
9
2
Figure 9: Load Regulation
0.1
February 16, 2011 | ADVANCED DATASHEET | V1.8 | PD97603
3
Load Current (A)
Load Current (A)
4
Load Current (A)
19VIN
12VIN
8VIN
19VIN
12VIN
8VIN
1
6
6
8
10
9
10
100
12
12
12A Highly Integrated SupIRBuck
1200
1000
100%
800
600
400
200
90%
80%
70%
60%
50%
1.060
1.058
1.056
1.054
1.052
1.050
0
Figure 6: Efficiency vs. Load Current for VIN = 12V
200
0.01
8
Figure 10: Line Regulation at I
Figure 8: R
9
10 11 12 13 14 15 16 17 18 19
400
0.1
FF
vs. Switching Frequency
Frequency (kHz)
Load Current (A)
VOUT = 1.05V; L = 1.5µH, 3.8mΩ
VOUT = 1.5V; L = 2.2µH, 4.6mΩ
VOUT = 3.3V; L = 3.3µH, 7.7mΩ
Input Voltage (V)
A
= 25
600
TM
1
o
C, no airflow,
5.0 Vout
4.0
3.0
2.0
1.0
OUT
IR3476
= 12A
800
10
4.5
3.5
2.5
1.5
0.5
1000
100