-
LT1680: High Power DC/DC Step-Up Controller Data Sheet8/23/2007PDF222K
Overview
Features and Benefits
- High Voltage: Operation Up to 60V
- High Current: N-Channel Drive Handles Up to 10,000pF Gate Capacitance
- Programmable Average Current Limiting
- 5V Reference Output with 10mA External Loading Capability
- Fixed Frequency Current Mode Operation
- Oscillator Synchronizable Up to 200kHz
- Undervoltage Lockout with Hysteresis
- Programmable Start Inhibit for Power Supply Sequencing and Protection
- User Adjustable Slope Compensation
Product Details
The LT1680 is a high power, current mode switching power supply controller optimized for boost topologies. The IC drives an N-channel MOSFET switch for DC/DC converter applications up to 60V input. A high current gate drive output handles up to 10,000pF gate capacitance, enabling the construction of high power DC/DC converters. Current sense common mode range up to 60V allows current sensing to be referenced to the input supply, eliminating the need for sense blanking circuits.
The LT1680 incorporates programmable average current limiting allowing accurate limiting of DC current in the magnetics, independent of ripple current. User adjustable slope compensation provides stable operation at duty cycles up to 90%.
The LT1680 operating frequency is programmable and can be synchronized up to 200kHz. Minimum off-time operation provides switch protection. The IC also incorporates a soft start feature that is gated by both shutdown and undervoltage lockout conditions.
Applications
- High Power Single Board Systems
- Distributed Power Converters
- Industrial Control Systems
- Lead-Acid Battery Back-Up Systems
- Automotive and Heavy Equipment
Product Categories
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
-
R352 Reliability Data3/26/2018PDF20 K
-
AN73 - LT1339 Design Manual8/20/2007PDF633K
Tools & Simulations
LTspice
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:
Design Resources
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 |
---|---|---|---|---|
LT1680CN#PBF | Material Declaration | Reliability Data | 16-Lead PDIP (Narrow 0.30 Inch) | |
LT1680CSW#PBF | Material Declaration | Reliability Data | 16-Lead SOIC (Wide 0.3 Inch) | |
LT1680CSW#TRPBF | Material Declaration | Reliability Data | 16-Lead SOIC (Wide 0.3 Inch) | |
LT1680IN#PBF | Material Declaration | Reliability Data | 16-Lead PDIP (Narrow 0.30 Inch) | |
LT1680ISW#PBF | Material Declaration | Reliability Data | 16-Lead SOIC (Wide 0.3 Inch) | |
LT1680ISW#TRPBF | Material Declaration | Reliability Data | 16-Lead SOIC (Wide 0.3 Inch) | |
Wafer Fabrication Data | R352 Reliability Data |
PCN-PDN Information
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.