Switching Controllers – Mouser Denmark

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Buck Converters for Power Over Ethernet

A buck converter is a power efficient voltage step-down converter that changes a higher voltage to a lower voltage. Whereas a linear regulator can achieve the same purpose, regulators can waste more energy via conversion of excess energy to heat. For this reason, a buck DC/DC converter is the preferred choice for power-efficient designs. A DC/DC boost converter, also known as a step-up converter, is a semiconductor device or electrical circuit that has an output DC voltage that is greater than the DC input voltage.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (DKK) Filter the results in the table by unit price based on your quantity.	Qty.	Topology	Number of Outputs	Switching Frequency	Duty Cycle - Max	Output Voltage	Output Current	Minimum Operating Temperature	Maximum Operating Temperature	Mounting Style	Package/Case	Packaging
Switching Controllers High Speed PWM Contr oller A 595-UC3823D A 595-UC3823DWTR UC3823DW Texas Instruments 1: 50,80 kr. 102In Stock	Mfr. Part No. UC3823DW Mouser Part No 595-UC3823DW	Texas Instruments	Switching Controllers High Speed PWM Contr oller A 595-UC3823D A 595-UC3823DWTR	Datasheet	102In Stock	50,80 kr. 39,17 kr. 36,33 kr. 33,05 kr. View 31,41 kr. 30,51 kr. 29,09 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	1 MHz	100 %	5.1 V	2 A	0 C	+ 70 C	SMD/SMT	SOIC-16	Tube
Switching Controllers High Speed PWM Contr oller UC3823N Texas Instruments 1: 54,16 kr. 112In Stock	Mfr. Part No. UC3823N Mouser Part No 595-UC3823N	Texas Instruments	Switching Controllers High Speed PWM Contr oller	Datasheet	112In Stock	54,16 kr. 41,93 kr. 37,15 kr. 34,24 kr. View 32,23 kr. 32,08 kr. 31,33 kr. Quote	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	1 MHz	100 %	5.1 V	2 A	0 C	+ 70 C	Through Hole	PDIP-16	Tube
Switching Controllers Current Mode UC3842AD Texas Instruments 1: 11,41 kr. 15In Stock 1.000Expected 23/11/2026	Mfr. Part No. UC3842AD Mouser Part No 595-UC3842AD	Texas Instruments	Switching Controllers Current Mode	Datasheet	15In Stock 1.000Expected 23/11/2026	11,41 kr. 8,36 kr. 7,31 kr. 6,67 kr. View 6,33 kr. 6,09 kr. 5,98 kr. 5,68 kr. 5,56 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842AD8 UC3842AD8TR Texas Instruments 1: 6,22 kr. 2.770In Stock	Mfr. Part No. UC3842AD8TR Mouser Part No 595-UC3842AD8TR	Texas Instruments	Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842AD8	Datasheet	2.770In Stock	Cut Tape 6,22 kr. 4,46 kr. 4,02 kr. 3,54 kr. Reel 2,93 kr. View 3,31 kr. 3,17 kr. 3,07 kr. 2,86 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-8	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode ALT 595 -UC3842AD ALT 595-U ALT 595-UC3842AD UC3842ADG4 Texas Instruments 1: 11,12 kr. 365In Stock	Mfr. Part No. UC3842ADG4 Mouser Part No 595-UC3842ADG4	Texas Instruments	Switching Controllers Current Mode ALT 595 -UC3842AD ALT 595-U ALT 595-UC3842AD	Datasheet	365In Stock	11,12 kr. 8,36 kr. 7,06 kr. 6,54 kr. View 6,16 kr. 5,01 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842AD UC3842ADTR Texas Instruments 1: 8,06 kr. 949In Stock 2.500Expected 08/02/2027	Mfr. Part No. UC3842ADTR Mouser Part No 595-UC3842ADTR	Texas Instruments	Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842AD	Datasheet	949In Stock 2.500Expected 08/02/2027	Cut Tape 8,06 kr. 5,87 kr. 5,31 kr. 4,70 kr. Reel 3,92 kr. View 4,41 kr. 4,24 kr. 4,06 kr. 3,77 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode UC3842D Texas Instruments 1: 11,49 kr. 611In Stock	Mfr. Part No. UC3842D Mouser Part No 595-UC3842D	Texas Instruments	Switching Controllers Current Mode	Datasheet	611In Stock	11,49 kr. 8,65 kr. 7,68 kr. 7,12 kr. View 6,80 kr. 6,42 kr. 6,15 kr. 6,03 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current Mode UC3842D8 Texas Instruments 1: 12,61 kr. 439In Stock	Mfr. Part No. UC3842D8 Mouser Part No 595-UC3842D8	Texas Instruments	Switching Controllers Current Mode	Datasheet	439In Stock	12,61 kr. 9,25 kr. 7,61 kr. 6,86 kr. View 6,54 kr. 6,37 kr. 6,35 kr. 6,30 kr. 6,24 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-8	Tube
Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842D8 UC3842D8TR Texas Instruments 1: 9,70 kr. 588In Stock	Mfr. Part No. UC3842D8TR Mouser Part No 595-UC3842D8TR	Texas Instruments	Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3842D8	Datasheet	588In Stock	Cut Tape 9,70 kr. 7,06 kr. 6,40 kr. 5,95 kr. Reel 5,95 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-8	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode UC3842N Texas Instruments 1: 13,95 kr. 163In Stock	Mfr. Part No. UC3842N Mouser Part No 595-UC3842N	Texas Instruments	Switching Controllers Current Mode	Datasheet	163In Stock	13,95 kr. 10,29 kr. 9,03 kr. 8,58 kr. View 8,13 kr. 7,25 kr. 7,12 kr. 6,99 kr. 6,80 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	Through Hole	PDIP-8	Tube
Switching Controllers Current Mode UC3843AD Texas Instruments 1: 15,96 kr. 1.085In Stock	Mfr. Part No. UC3843AD Mouser Part No 595-UC3843AD	Texas Instruments	Switching Controllers Current Mode	Datasheet	1.085In Stock	15,96 kr. 11,79 kr. 10,74 kr. 9,70 kr. View 9,10 kr. 8,80 kr. 8,50 kr. 8,36 kr. 8,06 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD8 UC3843AD8TR Texas Instruments 1: 6,22 kr. 2.772In Stock	Mfr. Part No. UC3843AD8TR Mouser Part No 595-UC3843AD8TR	Texas Instruments	Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD8	Datasheet	2.772In Stock	Cut Tape 6,22 kr. 4,46 kr. 4,02 kr. 3,54 kr. Reel 2,93 kr. View 3,31 kr. 3,17 kr. 3,07 kr. 2,78 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-8	Reel, Cut Tape, MouseReel
Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843AD UC3843ADG4 Texas Instruments 1: 15,96 kr. 106In Stock	Mfr. Part No. UC3843ADG4 Mouser Part No 595-UC3843ADG4	Texas Instruments	Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843AD	Datasheet	106In Stock	15,96 kr. 11,86 kr. 10,22 kr. 9,70 kr. View 9,10 kr. 8,95 kr. 8,50 kr. 8,36 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD UC3843ADTR Texas Instruments 1: 3,78 kr. 2.381In Stock	Mfr. Part No. UC3843ADTR Mouser Part No 595-UC3843ADTR	Texas Instruments	Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843AD	Datasheet	2.381In Stock	Cut Tape 3,78 kr. 2,68 kr. 2,61 kr. Reel 2,61 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode UC3843AN Texas Instruments 1: 11,49 kr. 536In Stock	Mfr. Part No. UC3843AN Mouser Part No 595-UC3843AN	Texas Instruments	Switching Controllers Current Mode	Datasheet	536In Stock	11,49 kr. 8,50 kr. 7,18 kr. 6,80 kr. View 6,37 kr. 6,16 kr. 6,14 kr. 5,75 kr. 5,63 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	Through Hole	PDIP-8	Tube
Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843AN UC3843ANG4 Texas Instruments 1: 11,56 kr. 356In Stock	Mfr. Part No. UC3843ANG4 Mouser Part No 595-UC3843ANG4	Texas Instruments	Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843AN	Datasheet	356In Stock	11,56 kr. 8,73 kr. 7,38 kr. 6,80 kr. View 6,42 kr. 5,21 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	Through Hole	PDIP-8	Tube
Switching Controllers Current Mode UC3843D Texas Instruments 1: 12,38 kr. 713In Stock	Mfr. Part No. UC3843D Mouser Part No 595-UC3843D	Texas Instruments	Switching Controllers Current Mode	Datasheet	713In Stock	12,38 kr. 9,18 kr. 7,76 kr. 7,38 kr. View 6,99 kr. 6,67 kr. 6,48 kr. 6,27 kr. 6,14 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current Mode A 595-U C3843D8TR A 595-UC3 A 595-UC3843D8TR UC3843D8 Texas Instruments 1: 12,38 kr. 883In Stock	Mfr. Part No. UC3843D8 Mouser Part No 595-UC3843D8	Texas Instruments	Switching Controllers Current Mode A 595-U C3843D8TR A 595-UC3 A 595-UC3843D8TR	Datasheet	883In Stock	12,38 kr. 9,18 kr. 7,53 kr. 7,06 kr. View 6,67 kr. 6,48 kr. 6,42 kr. 6,14 kr. 6,02 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-8	Tube
Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843D UC3843DG4 Texas Instruments 1: 10,74 kr. 198In Stock	Mfr. Part No. UC3843DG4 Mouser Part No 595-UC3843DG4	Texas Instruments	Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843D	Datasheet	198In Stock	10,74 kr. 8,06 kr. 6,80 kr. 6,27 kr. View 5,89 kr. 5,70 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Tube
Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843D UC3843DTR Texas Instruments 1: 6,74 kr. 931In Stock	Mfr. Part No. UC3843DTR Mouser Part No 595-UC3843DTR	Texas Instruments	Switching Controllers Current-Mode PWM Con troller A 595-UC384 A 595-UC3843D	Datasheet	931In Stock	Cut Tape 6,74 kr. 4,84 kr. 4,37 kr. 3,85 kr. Reel 2,86 kr. View 3,60 kr. 3,46 kr. 3,36 kr. 2,78 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	SMD/SMT	SOIC-14	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode UC3843N Texas Instruments 1: 26,04 kr. 89In Stock 1.450Expected 19/11/2026	Mfr. Part No. UC3843N Mouser Part No 595-UC3843N	Texas Instruments	Switching Controllers Current Mode	Datasheet	89In Stock 1.450Expected 19/11/2026	26,04 kr. 19,62 kr. 18,05 kr. 16,26 kr. View 15,44 kr. 15,37 kr. 14,40 kr. 14,02 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	Through Hole	PDIP-8	Tube
Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843N UC3843NG4 Texas Instruments 1: 26,04 kr. 482In Stock	Mfr. Part No. UC3843NG4 Mouser Part No 595-UC3843NG4	Texas Instruments	Switching Controllers Current-Mode PWM Con troller ALT 595-UC3 ALT 595-UC3843N	Datasheet	482In Stock	26,04 kr. 19,62 kr. 18,05 kr. 16,26 kr. View 15,44 kr. 15,37 kr. 14,40 kr. 14,02 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	500 kHz	100 %	5 V	200 mA	0 C	+ 70 C	Through Hole	PDIP-8	Tube
Switching Controllers CVCC Flyback Cntlr w / Primary-Side Reg A 595-UCC28722DBVR UCC28722DBVT Texas Instruments 1: 7,53 kr. 443In Stock	Mfr. Part No. UCC28722DBVT Mouser Part No 595-UCC28722DBVT	Texas Instruments	Switching Controllers CVCC Flyback Cntlr w / Primary-Side Reg A 595-UCC28722DBVR	Datasheet	443In Stock	Cut Tape 7,53 kr. 5,45 kr. 4,92 kr. 4,36 kr. Reel 4,07 kr. View 3,91 kr. 3,78 kr. 3,66 kr. 3,64 kr. MouseReel Available	Min.: 1 Mult.: 1 : 250	Buck, Flyback	1 Output	650 Hz to 80 kHz	99 %	21 V	37 mA	- 40 C	+ 125 C	SMD/SMT	SOT-23-6	Reel, Cut Tape, MouseReel
Switching Controllers High Speed Vltg Mode UCC35705DGK Texas Instruments 1: 22,31 kr. 2In Stock	Mfr. Part No. UCC35705DGK Mouser Part No 595-UCC35705DGK	Texas Instruments	Switching Controllers High Speed Vltg Mode	Datasheet	2In Stock	22,31 kr. 16,71 kr. 14,32 kr. 13,50 kr. View 12,83 kr. 12,61 kr. 12,09 kr. 11,71 kr. 11,49 kr.	Min.: 1 Mult.: 1	Boost, Buck, Flyback, Forward	1 Output	4 MHz	93 %	8.8 V	20 mA	0 C	+ 70 C	SMD/SMT	VSSOP-8	Tube
Switching Controllers Low-Power BiCMOS Cur rent-Mode PWM A 595 A 595-UCC3800D UCC3800DTR Texas Instruments 1: 16,19 kr. 908In Stock	Mfr. Part No. UCC3800DTR Mouser Part No 595-UCC3800DTR	Texas Instruments	Switching Controllers Low-Power BiCMOS Cur rent-Mode PWM A 595 A 595-UCC3800D	Datasheet	908In Stock	Cut Tape 16,19 kr. 12,01 kr. 10,97 kr. 9,85 kr. Reel 8,36 kr. View 9,33 kr. 9,03 kr. 8,06 kr. MouseReel Available	Min.: 1 Mult.: 1 : 2.500	Boost, Buck, Flyback, Forward	1 Output	1 MHz	100 %	5 V	1 A	0 C	+ 70 C	SMD/SMT	SOIC-8	Reel, Cut Tape, MouseReel