LT4430 - Secondary-Side Optocoupler Driver
Features
- 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) ThinSOTTM Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LT®4430 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT4430ES6#PBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LT4430ES6#TRMPBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LT4430ES6#TRPBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LT4430HS6#PBF | SOT-23 | S6 | H | 05-08-1636 | Yes |
| LT4430HS6#TRMPBF | SOT-23 | S6 | H | 05-08-1636 | Yes |
| LT4430HS6#TRPBF | SOT-23 | S6 | H | 05-08-1636 | Yes |
| LT4430IS6#PBF | SOT-23 | S6 | I | 05-08-1636 | Yes |
| LT4430IS6#TRMPBF | SOT-23 | S6 | I | 05-08-1636 | Yes |
| LT4430IS6#TRPBF | SOT-23 | S6 | I | 05-08-1636 | Yes |
| LT4430MPS6#PBF | SOT-23 | S6 | MP | 05-08-1636 | Yes |
| LT4430MPS6#TRMPBF | SOT-23 | S6 | MP | 05-08-1636 | Yes |
| LT4430MPS6#TRPBF | SOT-23 | S6 | MP | 05-08-1636 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT4430ES6#PBF | SOT-23 | E | $2.14 | Yes | ||
| LT4430ES6#TRMPBF | SOT-23 | E | $2.14 | $1.83 | Yes | |
| LT4430ES6#TRPBF | SOT-23 | E | $2.14 | $1.81 | Yes | |
| LT4430HS6#PBF | SOT-23 | H | $3.13 | Yes | ||
| LT4430HS6#TRMPBF | SOT-23 | H | $3.13 | $2.24 | Yes | |
| LT4430HS6#TRPBF | SOT-23 | H | $3.13 | $2.19 | Yes | |
| LT4430IS6#PBF | SOT-23 | I | $2.70 | Yes | ||
| LT4430IS6#TRMPBF | SOT-23 | I | $2.70 | $1.94 | Yes | |
| LT4430IS6#TRPBF | SOT-23 | I | $2.70 | $1.89 | Yes | |
| LT4430MPS6#PBF | SOT-23 | MP | $7.31 | Yes | ||
| LT4430MPS6#TRMPBF | SOT-23 | MP | $7.31 | $5.17 | Yes | |
| LT4430MPS6#TRPBF | SOT-23 | MP | $7.31 | $5.12 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC968A-A | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=34V-75V Vout=3.3V @ 30A | $150.00 | |
| DC968A-B | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=18V-36V, Vout=5V @ 20A | $175.00 | |
| DC968A-C | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=36V-75V, Vout=12V @ 12A | $150.00 | |
| DC968A-D | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=36V-75V, Vout=28V @ 4A | $175.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT4430HS6#PBF | SOT-23 | H | $3.13 | Yes | ||
| LT4430HS6#TRMPBF | SOT-23 | H | $3.13 | $2.24 | Yes | |
| LT4430HS6#TRPBF | SOT-23 | H | $3.13 | $2.19 | Yes | |
| LT4430IS6#PBF | SOT-23 | I | $2.70 | Yes | ||
| LT4430IS6#TRMPBF | SOT-23 | I | $2.70 | $1.94 | Yes | |
| LT4430IS6#TRPBF | SOT-23 | I | $2.70 | $1.89 | Yes | |
| LT4430MPS6#PBF | SOT-23 | MP | $7.31 | Yes | ||
| LT4430MPS6#TRMPBF | SOT-23 | MP | $7.31 | $5.17 | Yes | |
| LT4430MPS6#TRPBF | SOT-23 | MP | $7.31 | $5.12 | Yes | |
| Buy Now • Request Samples | ||||||
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
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Design Tools
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LT4430
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
