IR3897_13 Datasheet, PDF (34/47 Pages) International Rectifier – 4A Highly Integrated SupIRBuck Single‐Input Voltage

4A Highly Integrated SupIRBuck^TM
Single‐Input V_-o₃lt₄a_-ge, Synchronous Buck Regulator
APPLICATION DIAGRAM
PD‐97663
IR3897
Figure 28a: Application Circuit for a 12V to 1.2V, 4A Point of Load Converter
Suggested bill of materials for the application circuit
Part Reference Qty
Cin
2
Value
10uF
Description
1206, 25V, X5R, 20%
Manufacturer
TDK
C1 C5 C6
4
0.1uF
0603, 25V, X7R, 10%
Murata
Cref
1
100pF
0603,50V,NP0, 5%
Murata
C4
C2
Co
CVcc
C3
Cvin
1
2200pF
1
120pF
4
22uF
1
2.2uF
1
10nF
1
1.0uF
0603,50V,X7R
0603, 50V, NP0, 5%
0805, 6.3V, X5R, 20%
0603, 16V, X5R, 20%
0603, 25V, X7R, 10%
0603, 25V, X5R, 10%
Murata
Murata
TDK
TDK
Murata
Murata
Lo
R3
R5 R7
R6 R8
R4
Rt
R1 Rpg
R2
1
1.5H
SMD 7.05x6.6x4.8mm,6.7mΩ
Cyntec
1
3.01K
Thick Film, 0603,1/10W,1%
Panasonic
2
3.32K
Thick Film, 0603,1/10W,1%
Panasonic
2
2.37K
Thick Film, 0603,1/10W,1%
Panasonic
1
100
Thick Film, 0603,1/10W,1%
Panasonic
1
39.2K
Thick Film, 0603,1/10W,1%
Panasonic
2
49.9K
Thick Film, 0603,1/10W,1%
Panasonic
1
7.5K
Thick Film, 0603,1/10W,1%
Panasonic
U1
1
IR3897
PQFN 4x5mm
IR
Part Number
C3216X5R1E106M
GRM188R71E104KA01B
GRM1885C1H101JA01D
GRM188R71H222KA01B
GRM1885C1H121JA01D
C2012X5R0J226M
C1608X5R1C225M
GRM188R71E103KA01J
GRM188R61E105KA12D
PCMB065T-1R5MS
ERJ-3EKF3011V
ERJ-3EKF3321V
ERJ-3EKF2371V
ERJ-3EKF1000V
ERJ-3EKF3922V
ERJ-3EKF4992V
ERJ-3EKF7551V
IR3897MPBF
34 JANUARY 18, 2013 |DATA SHEET | Rev 3.5