Function is Step-Up, Step-Up/Step-Down - PMIC - Voltage Regulators - DC DC Switching Controllers Distributor - LT1680CSW#TRPBF LT1950EGN#TRPBF LT1950IGN#PBF - CHIPSIC

Part Number	Manufacturer / Brand	Brife Description	Part Status	Output Type	Function	Output Configuration	Topology	Number of Outputs	Output Phases	Voltage - Supply (Vcc/Vdd)	Frequency - Switching	Duty Cycle (Max)	Synchronous Rectifier	Clock Sync	Serial Interfaces	Control Features	Operating Temperature	Package / Case	Supplier Device Package
LT1680CSW#TRPBF	Linear Technology/Analog Devices	IC Regulators CTLR BST/FWRD Converter 16SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Forward Converter	1	1	9 V ~ 60 V	-	90%	No	Yes	-	Enable, Soft Start	0°C ~ 70°C (TA)	16-SOIC (0.295", 7.50mm Width)	16-SOIC
LT1950EGN#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 16SSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, Forward Converter, SEPIC	1	1	3 V ~ 25 V	100kHz ~ 500kHz	95%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	16-SSOP (0.154", 3.90mm Width)	16-SSOP
LT1950IGN#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 16SSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, Forward Converter, SEPIC	1	1	3 V ~ 25 V	100kHz ~ 500kHz	95%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	16-SSOP (0.154", 3.90mm Width)	16-SSOP
LT3757AEMSE#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive and Negative	Boost, Flyback, SEPIC	1	1	2.9 V ~ 40 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad	10-MSOP-EP
LT3757EDD#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOPOLOGY 10DFN	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive and Negative	Boost, Flyback, SEPIC	1	1	2.9 V ~ 40 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-WFDFN Exposed Pad	10-DFN (3x3)
LT3758AEMSE#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad	10-MSOP-EP
LT3758AHMSE#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 150°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad	10-MSOP-EP
LT3758EDD#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOPOLOGY 10DFN	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-WFDFN Exposed Pad	10-DFN (3x3)
LT3758EMSE#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad	10-MSOP-EP
LT3758EMSE#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad	10-MSOP-EP
LT3758IDD#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOPOLOGY 10DFN	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-WFDFN Exposed Pad	10-DFN (3x3)
LT3758IMSE#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	5.5 V ~ 100 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad	10-MSOP-EP
LT3759EMSE#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 12MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	1.6 V ~ 42 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Power Good, Soft Start	-40°C ~ 125°C (TJ)	12-TSSOP (0.118", 3.00mm Width) Exposed Pad	12-MSOP-EP
LT3759EMSE#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 12MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	1.6 V ~ 42 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Power Good, Soft Start	-40°C ~ 125°C (TJ)	12-TSSOP (0.118", 3.00mm Width) Exposed Pad	12-MSOP-EP
LT3759HMSE#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 12MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative, Isolation Capable	Boost, Flyback, SEPIC	1	1	1.6 V ~ 42 V	100kHz ~ 1MHz	-	No	Yes	-	Enable, Frequency Control, Power Good, Soft Start	-40°C ~ 150°C (TJ)	12-TSSOP (0.118", 3.00mm Width) Exposed Pad	12-MSOP-EP
LTC1871EMS#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative	Boost, Flyback, SEPIC	1	1	2.5 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871EMS-1#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative	Boost, Flyback, SEPIC	1	1	2.5 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871EMS-7#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Flyback, SEPIC	1	1	6 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871HMS#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative	Boost, Flyback, SEPIC	1	1	2.5 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 150°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871IMS#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative	Boost, Flyback, SEPIC	1	1	2.5 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871IMS-1#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative	Boost, Flyback, SEPIC	1	1	2.5 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871IMS-1#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive or Negative	Boost, Flyback, SEPIC	1	1	2.5 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871IMS-7#PBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Flyback, SEPIC	1	1	6 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1871IMS-7#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller MULT TOP 10MSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Flyback, SEPIC	1	1	6 V ~ 36 V	50kHz ~ 1MHz	92%	No	Yes	-	Enable, Frequency Control	-40°C ~ 125°C (TJ)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
LTC1872BES6#TRMPBF	Linear Technology/Analog Devices	IC Regulators Controller BOOST/SEPIC SOT23-6	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, SEPIC	1	1	2.5 V ~ 9.8 V	550kHz	-	No	No	-	Enable	-40°C ~ 85°C (TA)	SOT-23-6 Thin, TSOT-23-6	TSOT-23-6
LTC1872BES6#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller BOOST/SEPIC SOT23-6	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, SEPIC	1	1	2.5 V ~ 9.8 V	550kHz	-	No	No	-	Enable	-40°C ~ 85°C (TA)	SOT-23-6 Thin, TSOT-23-6	TSOT-23-6
LTC1872ES6#TRMPBF	Linear Technology/Analog Devices	IC Regulators Controller BOOST/SEPIC SOT23-6	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, SEPIC	1	1	2.5 V ~ 9.8 V	550kHz	-	No	No	-	Enable	-40°C ~ 85°C (TA)	SOT-23-6 Thin, TSOT-23-6	TSOT-23-6
LTC1872ES6#TRPBF	Linear Technology/Analog Devices	IC Regulators Controller BOOST/SEPIC SOT23-6	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, SEPIC	1	1	2.5 V ~ 9.8 V	550kHz	-	No	No	-	Enable	-40°C ~ 85°C (TA)	SOT-23-6 Thin, TSOT-23-6	TSOT-23-6
MAX15000AEUB+T	Maxim Integrated	IC Regulators Controller BOOST/FLYBK 10UMAX	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback	1	1	23.6 V ~ 30 V	25kHz ~ 625kHz	50%	No	No	-	Enable	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-uMAX
MAX15000BEUB+T	Maxim Integrated	IC Regulators Controller BOOST/FLYBK 10UMAX	Obsolete	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback	1	1	23.6 V ~ 30 V	12.5kHz ~ 625kHz	75%	No	No	-	Enable	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-uMAX
MAX15001AEUB+	Maxim Integrated	IC Regulators Controller BOOST/FLYBK 10UMAX	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback	1	1	9.5 V ~ 24 V	25kHz ~ 625kHz	50%	No	No	-	Enable	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-uMAX
MAX15001AEUB+T	Maxim Integrated	IC Regulators Controller BOOST/FLYBK 10UMAX	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback	1	1	9.5 V ~ 24 V	25kHz ~ 625kHz	50%	No	No	-	Enable	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-uMAX
MAX15004AAUE+T	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 500kHz	50%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	16-TSSOP-EP
MAX15004AAUE/V+T	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 500kHz	50%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	16-TSSOP-EP
MAX15005AAUE+T	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 1MHz	80%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	16-TSSOP-EP
MAX15005AAUE/V+T	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 1MHz	80%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	16-TSSOP-EP
MAX15005BAUE+T	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 1MHz	80%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width)	16-TSSOP
MAX15005BAUE/V+	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 1MHz	80%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width)	16-TSSOP
MAX15005BAUE/V+T	Maxim Integrated	IC Regulators Controller MULT TOP 16TSSOP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	4.5 V ~ 40 V	15kHz ~ 1MHz	80%	No	Yes	-	Enable, Frequency Control, Soft Start	-40°C ~ 125°C (TJ)	16-TSSOP (0.173", 4.40mm Width)	16-TSSOP
MAX1522EUT+T	Maxim Integrated	IC Regulators Controller MULT TOP SOT23-6	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Flyback, SEPIC	1	1	2.5 V ~ 5.5 V	-	85%	No	No	-	Enable	-40°C ~ 85°C (TA)	SOT-23-6	SOT-23-6
MAX1523EUT+T	Maxim Integrated	IC Regulators Controller MULT TOP SOT23-6	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Flyback, SEPIC	1	1	2.5 V ~ 5.5 V	-	85%	No	No	-	Enable	-40°C ~ 85°C (TA)	SOT-23-6	SOT-23-6
MAX1771CPA+	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8DIP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	0°C ~ 70°C (TA)	8-DIP (0.300", 7.62mm)	8-PDIP
MAX1771CSA	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	0°C ~ 70°C (TA)	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MAX1771CSA+	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	0°C ~ 70°C (TA)	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MAX1771CSA+T	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	0°C ~ 70°C (TA)	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MAX1771CSA-T	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	0°C ~ 70°C (TA)	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MAX1771EPA+	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8DIP	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	-40°C ~ 85°C (TA)	8-DIP (0.300", 7.62mm)	8-PDIP
MAX1771ESA	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	-40°C ~ 85°C (TA)	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MAX1771ESA+	Maxim Integrated	IC Regulators Controller BST/BUCK-BST 8SOIC	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive	Boost, Buck-Boost	1	1	3 V ~ 16.5 V	300kHz	92%	No	No	-	Enable	-40°C ~ 85°C (TA)	8-SOIC (0.154", 3.90mm Width)	8-SOIC
MAX668EUB	Maxim Integrated	IC Regulators Controller MULT TOP 10UMAX	Active	Transistor Driver	Step-Up, Step-Up/Step-Down	Positive, Isolation Capable	Boost, Flyback, SEPIC	1	1	3 V ~ 28 V	100kHz ~ 500kHz	90%	No	Yes	-	Enable, Frequency Control	-40°C ~ 85°C (TA)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-uMAX

Manufacturers for PMIC - Voltage Regulators - DC DC Switching Controllers