DC-DC Reference Designs

 

International Rectifier offers a wide range of reference designs for DC-DC applications. Each reference design kit includes a fully assembled and tested demo board along with applicable datasheets and application notes. A user guide contains the schematic and bill of materials for the evaluation board. The guide describes operation and use of the evaluation board itself.

International Rectifier now offers Simplis and IcePak models. The Simplis and IcePak models can be found under the Design Library tab below.

IRDC389 Series (Gen 3.0)

Advanced Integrated Point of Load DC-DC Voltage Regulator

  • Enhanced Line/Load Regulation with Feed-Forward
  • Programmable Switching Frequency up to 1.5MHz
  • Single Rail Operation, Tracking, Margining, OCP
Reference Design Featured Part Vin
(V)
Vout
(V)
Imax
(A)
kHz
Number Package
IRDC3847 IR3847 QFN 5x6 12V 1.2V 25 600kHz
IRDC3894 IR3894 QFN 5x6 12V 1.2V 12 600kHz
IRDC3895 IR3895 QFN 5x6 12V 1.2V 16 600kHz
IRDC3897 IR3897 QFN 4x5 12V 1.2V 4 600kHz
IRDC3898 IR3898 QFN 4x5 12V 1.2V 6 600kHz
IRDC3899 IR3899 QFN 4x5 12V 1.2V 9 600kHz
IRDC3823 IR3823 QFN 3.5x3.5 12V 1.2V 3 1000kHz

 


 

IRDC3891 and IRDC3892 Dual Output (Gen 3.0)

Advanced Integrated Point of Load DC-DC Voltage Regulator

  • Very small dual output solution size
  • Dual Output in 5x6mm PQFN
  • Out of phase operation to reduce Input Capacitors
  • Programmable Switching Frequency up to 1.5MHz (IRDC3891)
  • Programmable Switching Frequency up to 1.0MHz (IRDC3892)
Reference Design Featured Part Vin
(V)
Vout
(V)
Imax
(A)
kHz
Number Package
IRDC3891 IR3891 QFN 5x6 12V 1.2V 4 600kHz
IRDC3892 IR3892 QFN 5x6 12V 1.2V 6 600kHz

 


 

IRDC347 and IRDC386 Series

Constant On-Time Integrated Point of Load DC-DC Voltage Regulator Designed for Mobile Products that Require High Light Load Efficiency

  • Programmable Switching Frequency,
  • Thermally Compensated Over-Current Protection,
  • Soft Start, Pre-Bias Start Up, Enable Input, Power Good Output.
Reference Design Featured Part Vin
(V)
Vout
(V)
Imax
(A)
kHz
Number Package
IRDC3473 IR3473 QFN 5x6 12V 1.05V 6 300kHz
IRDC3475 IR3475 QFN 5x6 12V 1.05V 10 300kHz
IRDC3476 IR3476 QFN 5x6 12V 1.05V 12 300kHz
IRDC3477 IR3477 QFN 5x6 12V 1.05V 15 300kHz
IRDC3863 IR3863 QFN 4x5 12V 1.05V 6 300kHz
IRDC3865 IR3865 QFN 4x5 12V 1.05V 10 300kHz
   

 

 

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Voltage Regulator Reference Designs

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  • 1k Budgetary Pricing
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  • Technology
  • Part
  • Base Part Status
  • Input Voltage (V)
  • Output Current (A)
  • Output Voltage (V)
  • Switching Frequency (kHz)
  • Featured Part
Part
Output Voltage (V)
Switching Frequency (kHz)
Featured Part
Active
Active
Active
Active
12V
6
1.2V
600kHz
IR3892M
Active
12V
35
1.2V
600kHz
IR3846M
Active
12V
3
1.2V
1000kHz
IR3823M
Active
12V
25
1.2V
600kHz
IR3847M
Active
12V
4
1.2V
600kHz
IR3891M
Active
12V
4
1.2V
600kHz
IR3897M
Active
12V
9
1.2V
600kHz
IR3899M
Active
12V
16
1.2V
600kHz
IR3895M
Active
12V
12
1.2V
600kHz
IR3894M
Active
12V
6
1.2V
600kHz
IR3898M
Active
7V - 16V
12
1.05V
300kHz
IR3876M
Active
12V
15
1.05V
300kHz
IR3477M
Active
12V
6
1.05V
300kHz
IR3863M
Active
12V
6
1.05V
300kHz
IR3473M
Active
12V
10
1.05V
300kHz
IR3865M
Active
12V
12
1.05V
300kHz
IR3476M
Active
12V
10
1.05V
300kHz
IR3475M
Active
12V
6
1.8V
600kHz
IR3856M
Active
12V
9
1.8V
600kHz
IR3859M
Active
12V
8
1.05V
300kHz
IR3871M
Active
12V
4
1.8V
600kHz
IR3853M
Active
12V
14
1.8V
600kHz
IR3837M
Active
12V
10
1.8V
600kHz
IR3838M
Active
12V
6
1.8V
600kHz
IR3839M
Active
12V
8
1.8V
600kHz
IR3841WM
Active
12V
12
1.8V
600kHz
IR3840WM
Active
12V
4
1.8V
600kHz
IR3842WM

International Rectifier has designed and validated many common DC-DC applications. To save you time and ensure reliable operation, we have compiled this library of commonly used designs, including schematics and layout, for you to use, without modification, directly in your systems. The accompanying User Guide contains start up instructions, operating waveforms, schematic and bill of materials.

 

Select your Output Voltage
Single Output Dual Output
0.6V
0.75V
0.9V-1.05
1.2V
1.5V
1.8V
2.5V
3.3V
5.0V
1.2V-5.0V

 

Single Output 0.6V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A  
4A 400kHz IR3897  User Guide     Simplis Model Thermal Model TM Notes
6A 400kHz IR3898 User Guide Schematic   Simplis Model  
7A-9A  
10A-16A  
17A-35A  

 

Single Output 0.75V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A  
4A-6A 4A, 600kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
7A-9A  
10A-16A  
17A-35A  

 

Single Output 0.9V - 1.05V * 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A 1.5A, 1.05V, 600kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
4A-6A 6A, 1.05V, 600kHz IR3898 User Guide Schematic   Simplis Model  
7A-9A 9.5A, 0.9V, 450kHz IR3894 User Guide Schematic     Thermal Model TM Notes
8A, 1.05V, 500kHz IR3899 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
9A, 0.95V, 400kHz IR3894 User Guide Schematic Layout   Thermal Model TM Notes
9A, 0.90V, 1MHz IR3899 User Guide   Layout Simplis Model Thermal Model TM Notes
10A-16A 10A, 1.0V, 600kHz IR3448 User Guide     Simplis Model Thermal Model  
16A, 0.9V, 1MHz IR3448 User Guide     Simplis Model Thermal Model  
16A, 0.9V, 1MHz IR3847 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
16A, 0.9V, 1MHz IR3895 User Guide   Layout Simplis Model      
17A-35A 21A, 0.9V, 400kHz IR3847 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
20A, 0.9V, 750kHz IR3447 User Guide   Layout Simplis Model    
25A, 0.9V, 400kHz IR3846 User Guide   Layout   Thermal Model TM Notes
20A, 0.925V, 1.2MHz IR3847 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
25A, 1.0V, 300kHz, 5Vin IR3847 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
* Note -
The design can be used for any voltage in the range 0.9V - 1.05V by modifying the feedback resistor values. All other components remain unchanged.

 

Single Output 1.2V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A 3A, 1MHz IR3823 User Guide Schematic Layout Simplis Model  
4A-6A 4A, 600kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
4A, 400kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
6A, 600kHz IR3898 User Guide Schematic   Simplis Model  
6A, 400kHz IR3898 User Guide Schematic   Simplis Model  
6A, 607kHz,PMBus IR38060 User Guide Schematic/
Config File
Layout    
7A-9A 9A, 600kHz IR3899 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
9A, 400kHz IR3899 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
10A-16A 12A, 600kHz IR3894 User Guide Schematic     Thermal Model TM Notes
12A, 400kHz IR3894 User Guide Schematic     Thermal Model TM Notes
15A, 607kHz, PMBus IR38062 User Guide Schematic/
Config File
Layout    
16A, 600kHz IR3895 User Guide Schematic Layout Simplis Model  
16A, 400kHz IR3895 User Guide Schematic Layout Simplis Model  
17A-35A 25A, 600kHz IR3846 User Guide   Layout   Thermal Model TM Notes
25A, 600kHz IR3847 User Guide Schematic Layout Simplis Model Thermal Model TM Notes
25A, 607kHz, PMBus IR38063 User Guide Schematic/
Config File
Layout    
25A, 1MHz IR3847 User Guide   Layout Simplis Model Thermal Model TM Notes

 

Single Output 1.5V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A  
4A-6A 4A, 400kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
7A-9A  
10A-16A 16A, 400kHz IR3895 User Guide Schematic Layout Simplis Model  
17A-35A  

 

Single Output 1.8V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A 2.75A, 700kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
3A 3A, 1MHz IR3823 User Guide   Layout Simplis Model      
4A-6A 4A, 400kHz, 3.3Vin IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
7A-9A 8.5A, 1.2MHz IR3899 User Guide   Layout Simplis Model Thermal Model TM Notes
10A-16A 15A, 300kHz, 0.9V - 1.8V IR3447 User Guide   Layout Simplis Model  
17A-35A  

 

Single Output 2.5V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A  
4A-6A 3.8A, 2.625V, 600kHz IR3897 User Guide Schematic   Simplis Model Thermal Model TM Notes
7A-9A  
10A-16A 14A, 600kHz IR3895 User Guide Schematic Layout Simplis Model  
17A-35A 20A, 2.625V, 600kHz IR3447 User Guide Schematic Layout Simplis Model  

 

Single Output 3.3V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A  
4A-6A 4A, 1MHz IR3897 User Guide     Simplis Model Thermal Model TM Notes
6A, 1MHz IR3898 User Guide     Simplis Model  
7A-9A 7A, 600kHz IR3899 User Guide Schematic Layout Simplis Model  
9A, 1MHz IR3899 User Guide   Layout Simplis Model Thermal Model TM Notes
10A-16A 10A, 600kHz IR3894 User Guide       Thermal Model TM Notes
12A, 1MHz IR3894 User Guide       Thermal Model TM Notes
16A, 400kHz IR3895 User Guide Schematic Layout Simplis Model  
16A, 1MHz IR3895 User Guide   Layout Simplis Model  
17A-35A 25A, 1MHz IR3847 User Guide   Layout Simplis Model Thermal Model TM Notes
35A, 300kHz IR3846 User Guide   Layout   Thermal Model TM Notes

 


Single Output 5.0V 
Current Design Parameters Part Number User Guide Schematic Layout Simplis Model
(version 7.2F)
Thermal Model
(.DSN) (.BRD) icepak Notes
<3A  
4A-6A 4A, 1MHz IR3898 User Guide Schematic   Simplis Model  
7A-9A  
10A-16A 10A, 700kHz IR3895 User Guide Schematic Layout Simplis Model  
10A, 600kHz IR3894 User Guide Schematic     Thermal Model TM Notes
16A, 400kHz IR3895 User Guide Schematic Layout Simplis Model  
17A-35A 25A, 600kHz IR3447 User Guide Schematic Layout Simplis Model  
35A, 300kHz IR3846 User Guide   Layout   Thermal Model TM Notes

 

IR3891 4A+4A Dual Output 
Design Parameters User Guide Schematic Layout Simplis Model
(version 7.2F)
Voltage-1 Current-1 Voltage-2 Current-2 Frequency (.DSN) (.BRD)
1.2V 3A 1.2V 3A 450kHz User Guide   Layout Simplis Model
1.2V 3A 3.3V 3A 600kHz User Guide   Layout
1.5V 2.6A 1.1V 0.3A 600kHz User Guide Schematic Layout
1.5V 4A 3.3V 4A 600kHz User Guide   Layout
1.8V 4A 1.2V 4A 600kHz User Guide   Layout
2.5V 4A 1.8V 4A 700kHz, 5Vin User Guide   Layout
2.85V 4A 3.3V 4A 600kHz User Guide   Layout
3.3V 0.9A 1.8V 0.3A 600kHz User Guide Schematic Layout
3.3V 1A 2.5V 1A 900kHz User Guide   Layout
5V 4A 4.3V 4A 600kHz User Guide Schematic Layout