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
IRDC3847 High Current (Gen3.0)
Advanced Integrated Point of Load DC-DC Voltage Regulator
  • Remote Differential Voltage Sense
  • Programmable Switching Frequency up to 1.5MHz
  • Single Rail Operation, Tracking, Margining, OCP
Reference Design Featured Part Vin
(V)		 Vout
(V)		 Imax
(A)		 kHz
IRDC3847 IR3847 12V 1.2V 25 600kHz
IRDC3891 Dual Output (Gen 3.0)
Advanced Integrated Point of Load DC-DC Voltage Regulator
  • Dual Output in 5x6mm PQFN
  • Out of phase operation to reduce Input Capacitors
  • Programmable Switching Frequency up to 1.5MHz
Reference Design Featured Part Vin
(V)		 Vout
(V)		 Imax
(A)		 kHz
Number Package
IRDC3891 IR3891 QFN 5x6 12V 1.2V 4 600kHz
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
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
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
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.

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
IRDC3640 IR3640 25A, 600kHz, Synchronous Buck Controller Reference Design
IRDC3651 IR3651PBF Reference design kit featuring Wide Input Synchronous Buck Regulator
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
IRDC3840W IR3840W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 12A 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
IRDC3842W IR3842W Integrated Point of Load DC-DC Voltage Regulator (Gen 2.1) with Vin 12V, Vout 1.8V Imax 4A 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
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
IRDC3894 IR3894 Advanced Integrated Point of Load DC-DC Voltage Regulator with Vin = 12V, Vout = 1.2V, Imax up to 12A, and Fs = 600kHz
IRDC3895 IR3895 Advanced Integrated Point of Load DC-DC Voltage Regulator with Vin = 12V, Vout = 1.2V, Imax up to 16A, and Fs = 600kHz
IRDC3897 IR3897 Advanced Integrated Point of Load DC-DC Voltage Regulator with Vin = 12V, Vout = 1.2V, Imax up to 4A, and Fs = 600kHz
IRDC3898 IR3898 Advanced Integrated Point of Load DC-DC Voltage Regulator with Vin = 12V, Vout = 1.2V, Imax up to 6A, and Fs = 600kHz
IRDC3899 IR3899 Advanced Integrated Point of Load DC-DC Voltage Regulator with Vin = 12V, Vout = 1.2V, Imax up to 9A, and Fs = 600kHz
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
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
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

 
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