IR3894 Datasheet, PDF (32/43 Pages) International Rectifier – 12A HIGHLY INTERGRATED SUPLRBUCK

12A Highly Integrated SupIRBuck
Single‐Input V_-o₃l₂ta_-g_` e, Synchronous Buck Regulator
APPLICATION DIAGRAM
PD‐97745
IR3894
Figure 28: Application Circuit for a 12V to 1.2V, 12A Point of Load Converter
Suggested bill of materials for the application circuit
Part
Reference Qty Value
Description
Manufacturer
Cin
1 330uF
SMD Electrolytic F size 25V
20%
Panasonic
4
10uF
1206, 25V, X5R, 20%
TDK
C1 C5 C6
Cref
3 0.1uF
0603, 25V, X7R, 10%
1 1nF
0603, 25V, COG, 5%
Murata
Murata
C4
1 2200pF
0603,50V,X7R
C2
1 220pF
0603, 50V, NP0, 5%
Murata
Murata
Co
CVcc
8
22uF
1 2.2uF
0805, 6.3V, X5R, 20%
0603, 16V, X5R, 20%
TDK
TDK
C3
1
10nF
Cvin
1 1.0uF
0603, 25V, X7R, 10%
0603, 25V, X5R, 10%
Murata
Murata
Lo
1 0.51uH SMD 11.0x7.2x7.5mm, 0.29mΩ
Vitec
R3
1 1.82K
Thick Film, 0603,1/10W,1%
Panasonic
R5 R7
R6 R8
R4
2 4.02K
2 2.87K
1
100
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Panasonic
Panasonic
Panasonic
Rt
R1 Rpg
1 39.2K
2 49.9K
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Panasonic
Panasonic
R2
1
7.5K
Thick Film, 0603,1/10W,1%
Panasonic
U1
1 IR3894
PQFN 5x6mm
IR
Part Number
EEV-FK1E331P
C3216X5R1E106M
GRM188R71E104KA01B
GRM1885C1E102JA01D
GRM188R71H222KA01B
GRM1885C1H221JA01D
C2012X5R0J226M
C1608X5R1C225M
GRM188R71E103KA01J
GRM188R61E105KA12D
59PR9876N
ERJ-3EKF1821V
ERJ-3EKF4021V
ERJ-3EKF2871V
ERJ-3EKF1000V
ERJ-3EKF3922V
ERJ-3EKF4992V
ERJ-3EKF7551V
IR3894MPBF
32 AUGUST 08, 2012 | DATA SHEET | Rev 3.1