LTC3810
PRODUCTION100V Current Mode Synchronous Switching Regulator Controller
- Part Models
- 4
- 1ku List Price
- Starting From $5.31
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 1
Video 1
Product Selector Card 2
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3810EG#PBF | 28-Lead SSOP | ||
| LTC3810EG#TRPBF | 28-Lead SSOP | ||
| LTC3810IG#PBF | 28-Lead SSOP | ||
| LTC3810IG#TRPBF | 28-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC3810EG#PBF | PRODUCTION | |
| LTC3810EG#TRPBF | PRODUCTION | |
| LTC3810IG#PBF | PRODUCTION | |
| LTC3810IG#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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|---|---|---|
| Circuit Monitors 1 | ||
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| Hot Swap Controllers 1 | ||
| LTC4364 | RECOMMENDED FOR NEW DESIGNS | Surge Stopper with Ideal Diode |
| Oscillators 1 | ||
| LTC6909 | PRODUCTION | 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice 2
- LTC3810 Demo Circuit - High Efficiency Switching Surge Stopper (36-75V to 57Vclamp @ 5A)
- LTC3810 Demo Circuit - 36V to 72V Input Voltage to 12V @ 10A Buck Regulator
Models for the following parts are available in LTspice:
- LTC3810
- LTC3810-5
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.
Evaluation Kits
LTC3810EG Demo Board | 13V ≤ VIN ≤ 80V; VOUT = 12V @ 6A