Specification	LT1172CQ#TRPBF

Current - Output	1.25 A
Frequency - Switching	100 kHz
Function	Step-Down, Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	100 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive or Negative
Output Type	Adjustable
Package / Case	D2PAK, TO-263-6, TO-263BA
Supplier Device Package	DDPAK-5
Synchronous Rectifier	False
Topology	Boost, Forward Converter, Flyback, Cuk, Buck
Voltage - Input (Min) [Min]	3 V
Voltage - Output (Max)	65 V
Voltage - Output (Min/Fixed)	1.244 V

LT1172 Series

100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators

Part	Topology	Voltage - Output (Max) [Max]	Function	Voltage - Input (Max) [Max]	Package / Case	Voltage - Output (Min/Fixed)	Output Type	Mounting Type	Voltage - Input (Min) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Number of Outputs	Frequency - Switching	Supplier Device Package	Current - Output	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated LT1172HVCQ#TRPBF	Boost Buck Cuk Flyback Forward Converter	75 V	Step-Down Step-Up Step-Up/Step-Down	60 V	D2PAK TO-263-6 TO-263BA	1.244 V	Adjustable	Surface Mount	3 V	100 °C	0 °C	Positive or Negative	1	100 kHz	DDPAK-5	1.25 A
Analog Devices Inc./Maxim Integrated LT1172CQ#PBF	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		D2PAK TO-263-6 TO-263BA	1.244 V	Adjustable	Surface Mount	3 V	100 °C	0 °C	Positive or Negative	1	100 kHz	DDPAK-5	1.25 A	65 V
Analog Devices Inc./Maxim Integrated LT1172CQ#TRPBF	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		D2PAK TO-263-6 TO-263BA	1.244 V	Adjustable	Surface Mount	3 V	100 °C	0 °C	Positive or Negative	1	100 kHz	DDPAK-5	1.25 A	65 V
Analog Devices Inc./Maxim Integrated LT1172CK					TO-3-4			Through Hole							TO-3
Analog Devices Inc./Maxim Integrated LT1172CT#06PBF	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		TO-220-5	1.244 V	Adjustable	Through Hole	3 V	100 °C	0 °C	Positive or Negative	1	100 kHz	TO-220-5 Flow 6	1.25 A	65 V
Analog Devices Inc./Maxim Integrated LT1172HVCT#06PBF	Boost Buck Cuk Flyback Forward Converter	75 V	Step-Down Step-Up Step-Up/Step-Down	60 V	TO-220-5	1.244 V	Adjustable	Through Hole	3 V	100 °C	0 °C	Positive or Negative	1	100 kHz	TO-220-5 Flow 6	1.25 A
Analog Devices Inc./Maxim Integrated LT1172IN8#PBF	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		8-DIP (0.300" 7.62mm)	1.244 V	Adjustable	Through Hole	3 V	100 °C	-40 °C	Positive or Negative	1	100 kHz	8-PDIP	1.25 A	65 V
Analog Devices Inc./Maxim Integrated LT1172MJ8	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		8-CDIP (0.300" 7.62mm)	1.244 V	Adjustable	Through Hole	3 V	125 °C	-55 ░C	Positive or Negative	1	100 kHz	8-CERDIP	1.25 A	65 V
Analog Devices Inc./Maxim Integrated LT1172CT#PBF	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		TO-220-5	1.244 V	Adjustable	Through Hole	3 V	100 °C	0 °C	Positive or Negative	1	100 kHz	TO-220-5	1.25 A	65 V
Analog Devices Inc./Maxim Integrated LT1172MJ8#PBF	Boost Buck Cuk Flyback Forward Converter		Step-Down Step-Up Step-Up/Step-Down		8-CDIP (0.300" 7.62mm)	1.244 V	Adjustable	Through Hole	3 V	125 °C	-55 ░C	Positive or Negative	1	100 kHz	8-CERDIP	1.25 A	65 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Cut Tape (CT)	1	$ 12.87	1m+
		10	$ 9.09
		25	$ 8.11
		100	$ 7.03
		250	$ 6.50
	Digi-Reel®	1	$ 12.87	1m+
		10	$ 9.09
		25	$ 8.11
		100	$ 7.03
		250	$ 6.50
	N/A	455	$ 12.18	1m+
	Tape & Reel (TR)	750	$ 6.02	1m+
		1500	$ 5.96

Description

General part information

LT1172 Series

TheLT1170/LT1171/LT1172are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and "Cuk." A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. Integration of all functions allows the LT1170/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides "bust proof" operation similar to that obtained with 3-pin linear regulators.The LT1170/LT1171/LT1172 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation.The LT1170/LT1171/LT1172 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50μA typically for standby operation.ApplicationsLogic Supply 5V at 10A5V Logic to ±15V Op Amp SupplyBattery UpconverterPower Inverter (+ to –) or (– to +)Fully Floating Multiple OutputsUser NoteThis data sheet is only intended to provide specifications, graphs, and a general functional description of the LT1170/LT1171/LT1172. Application circuits are included to show the capability of the LT1170/LT1171/LT1172. A complete design manual (AN19) should be obtained to assist in developing new designs. This manual contains a comprehensive discussion of both the LT1070 and the external components used with it, as well as complete formulas for calculating the values of these components. The manual can also be used for the LT1170/LT1171/LT1172 by factoring in the higher frequency. A CAD design program called SwitcherCAD®is also available.

LT1172CQ#TRPBF

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Technical Specifications

LT1172 Series

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Description

LT1172 Series

Documents

R012 Reliability Data

Tape and Reel Packaging

Datasheet