Features and Benefits
- The H (Metal Can), J (Ceramic), and K (Metal Can) Packages Are Now Obsolete
- Wide Input Voltage Range: 3V to 60V
- Low Quiescent Current: 6mA
- Internal 5A Switch (2.5A for LT1071)
- Very Few External Parts Required
- Self-Protected Against Overloads
- Operates in Nearly All Switching Topologies
- Shutdown Mode Draws Only 50µA Supply Current
- Flyback Regulated Mode has Fully Floating Outputs
- Comes in Standard 5-Pin TO-220 Packages
- Can be Externally Synchronized (Consult Factory)
The LT1070/LT1071 are 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 LT1070/LT1071 to be built in a standard 5-pin T0-220 power package. This makes it extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear regulators.
The LT1070/LT1071 operate with supply voltages from 3Vto 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 LT1070/LT1071 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 typical for standby operation. Totally isolated and regulated outputs can be generated by using the optional “flyback regulation mode” built into the LT1070/LT1071, without the need for optocouplers or extra transformer windings.
- Logic Supply 5V at 10A
- 5V Logic to ± 15V Op Amp Supply
- Offline Converter up to 200W
- Battery Upconverter
- Power Inverter (+ to -) or (- to +)
- Fully Floating Multiple Outputs
- For Lower Current Applications, See the LT1072
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
R012 Reliability Data3/23/2018
AN29 - Some Thoughts on DC-DC Converters3/8/2013
AN44 - LT1074/LT1076 Design Manual2/5/2013
AN35 - Step Down Switching Regulators9/20/2010
AN39 - Parasitic Capacitance Effects in Step-Up Transformer Design7/22/2010
AN19 - LT1070 Design Manual8/14/2009
AN30 - Switching Regulator Circuit Collection10/31/2008
AN25 - Switching Regulators for Poets: A Gentle Guide for the Trepidatious10/15/2007
AN46 - Efficiency and Power Characteristics of Switching Regulator Circuits8/20/2007
AN31 - Linear Circuits for Digital Systems8/20/2007
DN18 - A Battery Powered Lap Top Computer Power Supply4/1/2014
DN11 - Achieving Microamp Quiescent Current in Switching Regulators3/21/2014
DN8 - Inductor Selection for LT 1070 Switching Regulators3/21/2014
Design Note 134: Telephone Ring-Tone Generation8/1/1996
Design Note 21: Floating Input Extends Regulator Capabilities3/1/1989
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT1070CT#06PBF||Material Declaration||Reliability Data||5-Lead TO-220 (Flow 06)|
|LT1070CT#30PBF||Material Declaration||Reliability Data||5-Lead TO-220 (Flow 30)|
|LT1070CT#PBF||Material Declaration||Reliability Data||5-Lead TO-220|
|LT1070HVCT#06PBF||Material Declaration||Reliability Data||5-Lead TO-220 (Flow 06)|
|LT1070HVCT#PBF||Material Declaration||Reliability Data||5-Lead TO-220|
|LT1070HVIT#06PBF||Material Declaration||Reliability Data||5-Lead TO-220 (Flow 06)|
|LT1070HVIT#PBF||Material Declaration||Reliability Data||5-Lead TO-220|
|LT1070IT#06PBF||Material Declaration||Reliability Data||5-Lead TO-220 (Flow 06)|
|LT1070IT#PBF||Material Declaration||Reliability Data||5-Lead TO-220|
|Wafer Fabrication Data||R012 Reliability Data|
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Sample & Buy
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Buy Now Pricing
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