ir3840 International Rectifier Corp., ir3840 Datasheet - Page 23

• Manufacturer Part Number: ir3840
• Description: Integrated 12a Synchronous Buck Regulator
• Manufacturer: International Rectifier Corp.

Part Reference
Cin
Lo
Co
R1
R2
R
R
R
C
R3
C3
C4
R8
R9
R10
C7
U1
02/09/09
t
OCSet
PG
ss
4.5 V <Vcc<5.5V
Application Diagram:
PGood
0.1 uF
Vin = 12 V
C
Fig. 16. Application circuit diagram for a 12V to 1.8 V, 12 A Point Of Load Converter
4.7 K
R
SS
PG
23.7 K
R
t
1 uF
C
Vcc
Suggested Bill of Materials for the application circuit:
Quantity
Vcc
PGood
Seq
Rt
SS/ SD
4.99 K
750
R
R
1
2
1 330uF
4 10uF
1 0.6uH
6 22uF
1 4.99K
1 750
1 23.7k
1 2.8k
1 4.7K
1 0.1uF
1 1.87k
1 220pF
1 10000pF
1 3.92K
1 2.49K
1 130
1 2200pF
1 IR3840
Value
Enable
Gnd
IR3840
Description
SMD Elecrolytic, Fsize, 25V, 20%
1206, 16V, X7R, 20%
11.5x10x4mm, 20%, 1.7mOhm
0805, 6.3V, X5R, 20%
Thick Film, 0603,1/10 W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10 W,1%
Thick Film, 0603,1/10W,1%
0603, 25V, X7R, 10%
Thick Film, 0603,1/10W,1%
50V, 0603, NPO, 5%
0603, 50V, X7R, 10%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
Thick Film, 0603,1/10W,1%
0603, 50V, X7R, 10%
SupIRBuck PQFN 5x6mm
Vin
PGnd
C
in
= 4 X 10 uF +
OCSet
Comp
330 uF
Boot
SW
Fb
10 nF
C4
0.1 uF
R
220 pF
2.8 K
OCSet
C6
C3
1.87 K
R3
0.6uH
Lo
Manufacturer
Panasonic
Panasonic - ECG
Delta
Panasonic- ECG
Rohm
Rohm
Rohm
Rohm
Rohm
Panasonic - ECG
Rohm
Panasonic- ECG
Panasonic - ECG
Rohm
Rohm
Panasonic - ECG
Panasonic - ECG
International Rectifier
3.92 K
R8
2.49 K
R9
IR3840MPbF
2.2nF
R10
130
C7
Part Number
EEV-FK1E331P
ECJ-3YX1C106K
MPL104-0R6
ECJ-2FB0J226ML
MCR03EZPFX4991
MCR03EZPFX7500
MCR03EZPFX2372
MCR03EZPFX2801
MCR03EZPFX4701
ECJ-1VB1E104K
MCR03EZPFX1871
ECJ-1VC1H221J
ECJ-1VB1H103K
MCR03EZPFX3921
MCR03EZPFX2491
ERJ-3EKF1300V
ECJ-1VB1H222K
IR3840MPbF
Co=6X22uF
Vo
23