IR3897 IRF [International Rectifier], IR3897 Datasheet - Page 34

• Manufacturer Part Number: IR3897
• Description: 4A HIGHLY INTEGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

Suggested bill of materials for the application circuit 5V to 1V
Part Reference
R5 R6 R7 R8
C1 C5 C6
CVcc
Cvin
Cref
Rpg
Cin
C4
C2
Co
C3
R3
R4
U1
Lo
Rt
PGood
34
Vin= 5 V
49.9K
R
Figure 29: Application Circuit for a 5V to 1V, 4A Point of Load Converter
PG
Qty
AUGUST 08, 2012 |DATA SHEET | Rev 3.3
3
3
1
1
1
4
1
1
1
1
1
4
1
1
2
1
39.2 . K
R
2.2uF
t
C
Vcc
2200pF
IR3897
100pF
Value
0.1uF
2.2uF
5.6nF
1.0uF
3.32K
39.2K
49.9K
3.01k
10uF
22uF
1uH
1nF
100
Vcc/LDO_out
Rt/Sync
PGood
S_Ctrl
Vp
Cref
1nF
Vref
Single‐Input Voltage, Synchronous Buck Regulator
Vin
SMD 6.86x6.47x5mm,4.7mΩ
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Enable
0805, 6.3V, X5R, 20%
1206, 25V, X5R, 20%
0603, 25V, X7R, 10%
0603, 16V, X5R, 20%
0603, 50V, X7R, 10%
0603, 25V, X5R, 10%
0603,50V,X7R, 10%
0603, 50V, NP0, 5%
Gnd
IR 3897
0603,50V,X7R
PQFN 4x5mm
Enable
Description
PVin
PGnd
C6
- 34 -
0.1uF
4A Highly Integrated SupIRBuck
U1
Comp
Vsns
C
Boot
in
SW
Fb
= 3 X 10uF
Manufacturer
0. 1 uF
5.6nF
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
C1
C3
Murata
Murata
Murata
Murata
Murata
Murata
3.32k
R8
TDK
TDK
TDK
TDK
IR
100pF
C2
3.01k
R3
1 uH
Lo
3.32k
R7
3.32k
R5
GRM188R71E104KA01B
GRM188R71H102KA01B
GRM188R71H222KA01B
GRM188R71H562KA01D
GRM188R61E105KA12D
GRM1885C1H101JA01D
C3216X5R1E106M
C1608X5R1C225M
C2012X5R0J226M
SPM6550T-1R0M
3.32k
ERJ-3EKF3011V
ERJ-3EKF3321V
ERJ-3EKF1000V
ERJ-3EKF3922V
ERJ-3EKF4992V
R6
IR3897MPBF
Part Number
2.2nF
100
C4
R4
TM
Co=4X22uF
Vo=1V
IR3897
0.1uF
C5
PD‐97663