DocumentationDatasheet
Reliability Data
Press Release
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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
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.
SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT4430ES6#PBF | SOT | 6 | E | $2.14 | |
| LT4430ES6#TRMPBF | SOT | 6 | E | $2.14 | $1.83 |
| LT4430ES6#TRPBF | SOT | 6 | E | $2.14 | $1.81 |
| LT4430HS6#PBF | SOT | 6 | H | $3.13 | |
| LT4430HS6#TRMPBF | SOT | 6 | H | $3.13 | $2.24 |
| LT4430HS6#TRPBF | SOT | 6 | H | $3.13 | $2.19 |
| LT4430IS6#PBF | SOT | 6 | I | $2.70 | |
| LT4430IS6#TRMPBF | SOT | 6 | I | $2.70 | $1.94 |
| LT4430IS6#TRPBF | SOT | 6 | I | $2.70 | $1.89 |
| LT4430MPS6#PBF | SOT | 6 | MP | $7.31 | |
| LT4430MPS6#TRMPBF | SOT | 6 | MP | $7.31 | $5.17 |
| LT4430MPS6#TRPBF | SOT | 6 | MP | $7.31 | $5.12 |
| LT4430ES6 | SOT | 6 | E | $4.28 | |
| LT4430ES6#TR | SOT | 6 | E | $4.28 | $3.62 |
| LT4430ES6#TRM | SOT | 6 | E | $4.28 | $3.66 |
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 |