Overview
Features and Benefits
- High Voltage Operation: Up to 100V
- Large 1Ω Gate Drivers
- No Current Sense Resistor Required
- Dual N-Channel MOSFET Synchronous Drive
- Extremely Fast Transient Response
- ±0.5% 0.8V Voltage Reference
- Programmable Output Voltage Tracking/Soft-Start
- Generates 10V Driver Supply from Input Supply
- Synchronizable to External Clock
- Selectable Pulse Skip Mode Operation
- Power Good Output Voltage Monitor
- Adjustable On-Time/Frequency: tON(MIN) < 100ns
- Adjustable Cycle-by-Cycle Current Limit
- Programmable Undervoltage Lockout
- Output Overvoltage Protection
- 28-Pin SSOP Package
Product Details
The LTC3810 is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The LTC3810 uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor.
A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3810 to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. A shutdown pin allows the LTC3810 to be turned off, reducing the supply current to 240μA.
Integrated bias control generates gate drive power from the input supply during start-up and when an output short-circuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher efficiency.
| Features | Adj UVLO, Sync & Tracking | Package | |
| LTC3810 | Vin 6.2V to 100V, 10V Driver Voltage | Yes | SSOP-28 |
| LTC3810-5 | Vin 4.35V to 60V, 5.5V Driver Voltage | Yes | QFN-32 |
| LTC3812-5 | Vin 4.35 to 60V, 5.5V Driver Voltage | No | TSSOP-16E |
Applications
- 48V Telecom and Base Station Power Supplies
- Networking Equipment, Servers
- Automotive and Industrial Control Systems
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.
Evaluation Kits (1)
Documentation & Resources
-
R533 Reliability Data3/26/2018PDF17 K
-
DC952A - Demo Manual9/24/2009PDF128K
-
80V to 150V Non-Isolated DC/DC2/6/2018PDF661K
-
High Voltage Non-Isolated Devices1/5/2018PDF661K
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LTC3810
LTC3810-5
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 |
|---|---|---|---|---|
| LTC3810EG#PBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC3810EG#TRPBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC3810IG#PBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| LTC3810IG#TRPBF | Material Declaration | Reliability Data | 28-Lead SSOP | |
| Wafer Fabrication Data | R533 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
LTC3810 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.