INTERNATIONAL RECTIFIER - THE POWER MANAGEMENT LEADER
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.
Featured Kits
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
IRDC38 Series (Gen2.1)
Integrated Point of Load DC-DC Voltage Regulator
  • Programmable Soft Start
  • Programmable Over Current Protection
  • Pre-Bias Start Up
Reference Design Featured Part Vin
(V)		 Vout
(V)		 Imax
(A)		 kHz
IRDC3831W IR3831W 12V 0.75V 8 400kHz
IRDC3832W IR3832W 12V 0.75V 4 400kHz
IRDC3837 IR3837 12V 1.8V 14 600kHz
IRDC3838 IR3838 12V 1.8V 10 600kHz
IRDC3839 IR3839 12V 1.8V 6 600kHz
IRDC3840W IR3840W 12V 1.8V 12 600kHz
IRDC3841W IR3841W 12V 1.8V 8 600kHz
IRDC3842W IR3842W 12V 1.8V 4 600kHz
IRDC3843W IR3843W 12V 1.8V 2 600kHz
IRDC3853 IR3853 12V 1.8V 4 600kHz
IRDC3856W IR3856W 12V 1.8V 6 600kHz
IRDC3859 IR3859 12V 1.8V 9 600kHz
IRDC3871 IR3871 12V 1.1V 8 300kHz
IRDC38 Series (Gen2.0)
Integrated Point of Load DC-DC Voltage Regulator
  • Programmable Soft Start
  • Programmable Over Current Protection
  • Pre-Bias Start Up
Reference Design Featured Part Vin
(V)		 Vout
(V)		 Imax
(A)		 kHz
IRDC3831 IR3831 12V 0.75V 8 400kHz
IRDC3840 IR3840 12V 1.8V 12 600kHz
IRDC3840A IR3840A 12V 1.8V 14 600kHz
IRDC3841 IR3841 12V 1.8V 8 600kHz
IRDC3842 IR3842 12V 1.8V 4 600kHz
IRDC3842A IR3842A 12V 1.8V 6 600kHz
IRDC3843A IR3843A 12V 1.8V 3 600kHz
IRDC38 Series
Integrated Point of Load DC-DC Voltage Regulator
  • Programmable Soft Start
  • Programmable Over Current Protection
  • Pre-Bias Start Up
Reference Design Featured Part Feature Vin
(V)		 Vout
(V)		 Imax
(A)		 kHz
IRDC3820 IR3820MPbF Power Good 12 1.8 12 600
IRDC3820A IR3820AMPbF Power Good 12 1.8 14 300
IRDC3821 IR3821MPbF Power Good 12 1.8 7 600
IRDC3821A IR3821AMPbF Power Good 12 1.8 9 300
IRDC3822 IR3822MPbF Power Good 12 1.8 4 600
IRDC3822A IR3822AMPbF Power Good 12 1.8 6 300
IRDC3810 IR3810MPbF Tracking 12 0.75 12 600
IRDC3811 IR3811MPbF Tracking 12 0.75 7 600
IRDC3812 IR3812MPbF Tracking 12 0.75 4 600
IRDC3802 IR3802MPbF Tracking 12 3.3 4 600
IRDC3802A IR3802AMPbF Tracking 12 3.3 6 300
IRDCiP1827
  • 25A Single-Input Synchronous Buck Regulator
  • Featuring iP1827
  • VIN = 12V, VOUT = 1.8V,
  • IOUT max = 25A | FSw = 600kHz
IRDCiP1837
  • 35A Single-Input Synchronous Buck Regulator
  • Featuring iP1837
  • VIN = 12V, VOUT = 1.8V,
  • IOUT max = 35A | FSw = 600kHz
IRDC3651
Wide Input Synchronous Buck Regulator
  • Ideal for onboard DC to DC applications
  • 48 Vin, 3.3 Vout @ 10A Iout
  • 100 KHz switching frequency
  • Featuring IR3651SPBF controller
  • Foot print compatible with either DirectFETs or SO8 MOSFETs
IRDC3640
25A, 600kHz, Synchronous Buck Controller Reference Design
  • Featuring IR3640M PWM Controller
  • Programmable soft-start ramp
  • Power Good
  • Thermal protection
  • Over voltage and over current protection
  • Programmable switching frequency
  • Tracking input
  • Enable input
  • Input under-voltage lockout for proper start-up
  • Pre-bias start-up.
IRDC3622D
Dual Output Reference Design using Dual Synchronous Buck Controller
  • Featuring IR3622MPbF with IRF6622 and IRF6629 DirectFET MOSFETs
  • 12 Vin, 2.5 Vout @ 20A Iout and 1.8 Vout @ 20A Iout
  • 350 KHz switching frequency per output
  • Current sharing reference design also available- see IRDC3622S

Reference Design Part Number Description
IRDC3473 IR3473 Constant On-Time Integrated Point of Load DC-DC Voltage Regulator with VIN = 12V, VOUT = 1.05V, FS = 300kHz, up to 6A
IRDC3475 IR3475 Constant On-Time Integrated Point of Load DC-DC Voltage Regulator with VIN = 12V, VOUT = 1.05V, FS = 300kHz, up to 10A
IRDC3476 IR3476 Constant On-Time Integrated Point of Load DC-DC Voltage Regulator with VIN = 12V, VOUT = 1.05V, FS = 300kHz, up to 12A
IRDC3477 IR3477 Constant On-Time Integrated Point of Load DC-DC Voltage Regulator with VIN = 12V, VOUT = 1.05V, FS = 300kHz, up to 15A
IRDC3622D IR3622MPBF Dual Output Reference Design using Dual Synchronous Buck Controller
IRDC3622S IR3622MPBF Current Sharing Reference Design using Dual Channel Synchronous Buck Controller
IRDC3637 IR3637 Reference design kit featuring High Performance Synchronous Buck Controller
IRDC3640 IR3640 25A, 600kHz, Synchronous Buck Controller Reference Design
IRDC3651 IR3651PBF Reference design kit featuring Wide Input Synchronous Buck Regulator
IRDC3802 IR3802 Integrated Point of Load DC-DC Voltage Regulator with Tracking with Vin 12V, Vout 3.3V and Imax 4A
IRDC3802A IR3802A Integrated Point of Load DC-DC Voltage Regulator with Tracking with Vin 12V, Vout 3.3V and Imax 6A
IRDC3810 IR3810 Integrated Point of Load DC-DC Voltage Regulator with Tracking with Vin 12V, Vout 0.75V and Imax 12A
IRDC3811 IR3811 Integrated Point of Load DC-DC Voltage Regulator with Tracking with Vin 12V, Vout 0.75V and Imax 7A
IRDC3812 IR3812 Integrated Point of Load DC-DC Voltage Regulator with Tracking with Vin 12V, Vout 0.75V and Imax 4A
IRDC3820 IR3820 Integrated Point of Load DC-DC Voltage Regulator with PowerGOOD with Vin 12V, Vout 1.8V and Imax 12A
IRDC3820A IR3820A Integrated Point of Load DC-DC Voltage Regulator with PowerGOOD with Vin 12V, Vout 1.8V and Imax 14A
IRDC3821 IR3821 Integrated Point of Load DC-DC Voltage Regulator with PowerGOOD with Vin 12V, Vout 1.8V and Imax 7A
IRDC3821A IR3821A Integrated Point of Load DC-DC Voltage Regulator with PowerGOOD with Vin 12V, Vout 1.8V and Imax 9A
IRDC3822 IR3822 Integrated Point of Load DC-DC Voltage Regulator with PowerGOOD with Vin 12V, Vout 1.8V and Imax 4A
IRDC3822A IR3822A Integrated Point of Load DC-DC Voltage Regulator with PowerGOOD with Vin 12V, Vout 1.8V and Imax 6A
IRDC3831 IR3831 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 0.75V Imax 8A and Fs 400kHz
IRDC3831W IR3831W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 0.75V Imax 8A and Fs 400kHz
IRDC3832W IR3832W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 0.75V Imax 4A and Fs 400kHz
IRDC3837 IR3837 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 14A and Fs 600kHz
IRDC3838 IR3838 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 10A and Fs 600kHz
IRDC3839 IR3839 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 6A and Fs 600kHz
IRDC3840 IR3840 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 1.8V Imax 12A and Fs 600kHz
IRDC3840A IR3840A Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 1.8V Imax 14A and Fs 600kHz
IRDC3840W IR3840W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 12A and Fs 600kHz
IRDC3841 IR3841 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 1.8V Imax 8A and Fs 600kHz
IRDC3841W IR3841W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 8A and Fs 600kHz
IRDC3842 IR3842 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 1.8V Imax 4A and Fs 600kHz
IRDC3842A IR3842A Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 1.8V Imax 6A and Fs 600kHz
IRDC3842W IR3842W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 4A and Fs 600kHz
IRDC3843A IR3843A Integrated Point of Load DC-DC Voltage Regulator (Gen 2.0) with Vin 12V, Vout 1.8V Imax 3A and Fs 600kHz
IRDC3843W IR3843W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 2A and Fs 600kHz
IRDC3853 IR3853 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 4A and Fs 600kHz
IRDC3856W IR3856W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 6A and Fs 600kHz
IRDC3859 IR3859 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 9A and Fs 600kHz
IRDC3863 IR3863 Constant On-Time Integrated Point of Load DC-DC Voltage Regulator with VIN = 12V, VOUT = 1.05V, FS = 300kHz, up to 6A
IRDC3865 IR3865 Constant On-Time Integrated Point of Load DC-DC Voltage Regulator with VIN = 12V, VOUT = 1.05V, FS = 300kHz, up to 10A
IRDC3871 IR3871 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.1V Imax 8A and Fs 300kHz
IRDC3876 IR3876 High Efficiency Integrated Point of Load DC-DC Voltage Regulator with Vin = 7V to 16V, Vout = 1.05V, Imax up to 12A, and Fs = 300kHz
IRDCiP1827 iP1827 Reference Design kit for the iP1827 a 600kHz, 25A SupIRBuck Synchronous Buck Converter
IRDCiP1837 iP1837 Reference Design kit for the iP1837 a 600kHz, 35A SupIRBuck Synchronous Buck Converter

ARCHIVED KITS
A limited supply of these archived reference designs still may be available. To learn if quantities are available in your area, please click on the reference design part number listed below, then select your region and click on “Check Availability.”
Reference Design Part Number Description
IRDC3037 IRU3037 8-pin synchronous PWM controller, 200 KHz
IRDC3037A IRU3037A 8-pin synchronous PWM controller, 400 KHz
IRDC3065 IRU3065 Positive to Negative Voltage Converter
IRDC3146 IRU3146 Reference design kit featuring High Performance Dual Synchronous Buck Controller
IRDC3621 IR3621M Reference design kit featuring High Performance Dual Synchronous Buck Controller
IRDC3624 IR3624 Reference design kit featuring High Performance Synchronous Buck Controller
IRDC3870 IR3870 Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.1V Imax 10A and Fs 500kHz
IRDCiP1201-A iP1201 2-phase, 30A, 3.14-5.5VIN, 0.8-3.3VOUT sychronous buck converter reference design
IRDCiP1202-A iP1202 2-phase, 30A, 5.5-13.2VIN, 0.8-3.3VOUT sychronous buck converter reference design
IRDCiP1203-A iP1203 1-phase, 15A, 5.5-13.2VIN, 1.0-3.3VOUT sychronous buck converter reference design
IRDCiP1206-A iP1206 1-phase 300 kHz, 30A, 7.5-14.5V IN, 0.8-5.5VOUT sychronous buck converter reference design
IRDCiP1206-B iP1206 2-phase 300 kHz, 30A, 7.5-14.5V IN, 0.8-8.0VOUT sychronous buck converter reference design
IRDCiP2001-A iP2001 2-phase, 40A, 5-12VIN, 1-2VOUT multiphase buck converter reference design
IRDCiP2001-B iP2001 3-phase, 60A, 5-12VIN, 1-2VOUT multiphase buck converter reference design
IRDCiP2001-C iP2001 4-phase, 80A, 5-12VIN, 1-2VOUT multiphase buck converter reference design
IRDCiP2002-C iP2002 4-phase, 120A, 6.5-12VIN, 0.8-3.3VOUT multiphase buck converter reference design
IRDCiP2003A-C iP2003A 4-phase, 160A, 5-12VIN, 0.8-3.3VOUT 4MHz Switching Frequency multiphase buck converter reference design
IRDCiP2005A-A iP2005A 2-phase, 80A, 9.5-13.2VIN, 0.8-1.6VOUT synchronous buck converter
IRDCiP2021C-1 iP2021C and IR3623M 500kHz, 40A, Single Output, Dual Phase Synchronous Buck Converter
IRDCiP2021C-2 iP2021C and IR3623M 500kHz, 20A, Dual Output, 180° Out of Phase Synchronous Buck Converter
IRISMPS1 IRIS4007K DC-DC flyback power supply, IRIS4007(K), 48VIN, 5VOUT, 5A IOUT

 
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