LTC3813
PRODUCTION100V Current Mode Synchronous Step-Up Controller
- Part Models
- 4
- 1ku List Price
- Starting From $5.67
Overview
- High Output Voltages: Up to 100V
- Large 1Ω Gate Drivers
- No Current Sense Resistor Required
- Dual N-Channel MOSFET Synchronous Drive
- ±0.5% 0.8V Voltage Reference
- Fast Transient Response
- Programmable Soft-Start
- Generates 10V Driver Supply from Input Supply
- Synchronizable to External Clock
- Power Good Output Voltage Monitor
- Adjustable Off-Time/Frequency: tOFF(MIN) < 100ns
- Adjustable Cycle-by-Cycle Current Limit
- Programmable Undervoltage Lockout
- Output Overvoltage Protection
- 28-Pin SSOP Package
The LTC3813 is a synchronous step-up switching regulator controller that can generate output voltages up to 100V. The LTC3813 uses a constant off-time peak current control architecture 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 LTC3813 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 LTC3813 to be turned off, reducing the supply current to 240µA.
Applications
- 24V Fan Supplies
- 48V Telecom and Base Station Power Supplies
- Networking Equipment, Servers
- Automotive and Industrial Control Systems
Documentation
Data Sheet 1
Technical Articles 1
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 |
|---|---|---|---|
| LTC3813EG#PBF | 28-Lead SSOP | ||
| LTC3813EG#TRPBF | 28-Lead SSOP | ||
| LTC3813IG#PBF | 28-Lead SSOP | ||
| LTC3813IG#TRPBF | 28-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC3813EG#PBF | PRODUCTION | |
| LTC3813EG#TRPBF | PRODUCTION | |
| LTC3813IG#PBF | PRODUCTION | |
| LTC3813IG#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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| LTC3784 | RECOMMENDED FOR NEW DESIGNS | 60V PolyPhase Synchronous Boost Controller with PassThru |
| LTC3862 | PRODUCTION | Multi-Phase Current Mode Step-Up DC/DC Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3813
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.