LT4430
PRODUCTIONSecondary-Side Optocoupler Driver
- Part Models
- 8
- 1ku List Price
- Starting From $3.01
Overview
- 600mV Reference (1.25% Over Temperature)
- Wide Input Supply Range: 3V to 20V
- Overshoot Control Function Prevents Output Overshoot on Start-Up and Short-Circuit Recovery
- High Bandwidth Error Amplifier Permits Simple Loop Frequency Compensation
- Ground-Referenced Opto-Coupler Drive
- 10mA Opto-Coupler Drive with Current Limiting
- Low Profile (1mm) ThinSOT™ Package
The LT4430 drives the opto-coupler that crosses the galvanic barrier in an isolated power supply. The IC contains a precision-trimmed reference, a high bandwidth error amplifier, an inverting gain of 6 stage to drive the optocoupler and unique overshoot control circuitry.
The LT4430’s 600mV reference provides ±0.75% initial accuracy and ±1.25% tolerance over temperature. A high bandwidth 9MHz error amplifier permits simple frequency compensation and negligible phase shift at typical loop crossover frequencies. The opto-coupler driver provides 10mA of output current and is short-circuit protected. A unique overshoot control function prevents output overshoot on start-up and short-circuit recovery with a single capacitor.
The LT4430 is available in the low profile 6-lead TSOT-23 package.
Applications
- 48V Input Isolated DC/DC Converters
- Isolated Telecommunication Power Systems
- Distributed Power Step-Down Converters
- Offline Isolated Power Supplies
- Industrial Control Systems
- Automotive and Heavy Equipment
Documentation
Data Sheet 1
User Guide 4
Technical Articles 3
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 |
|---|---|---|---|
| LT4430ES6#TRMPBF | 6-Lead TSOT-23 | ||
| LT4430ES6#TRPBF | 6-Lead TSOT-23 | ||
| LT4430HS6#TRMPBF | 6-Lead TSOT-23 | ||
| LT4430HS6#TRPBF | 6-Lead TSOT-23 | ||
| LT4430IS6#TRMPBF | 6-Lead TSOT-23 | ||
| LT4430IS6#TRPBF | 6-Lead TSOT-23 | ||
| LT4430MPS6#TRMPBF | 6-Lead TSOT-23 | ||
| LT4430MPS6#TRPBF | 6-Lead TSOT-23 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Switching Regulators & Controllers 2 | ||
| LTM8047 | RECOMMENDED FOR NEW DESIGNS | 3.1VIN to 32VIN Isolated μModule (Power Module) DC/DC Converter |
| LTM8048 | RECOMMENDED FOR NEW DESIGNS | 3.1VIN to 32VIN Isolated μModule (Power Module) DC/DC Converter with LDO Post Regulator |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT4430
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
LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 34V-75V VOUT = 3.3V @ 30A
Resources
LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 18V-36V, VOUT = 5V @ 20A
Resources
OBSOLETE: LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 12V @ 12A
Resources
LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 28V @ 4A