LT3469 - Piezo Microactuator Driver with Boost Regulator
Features
- Current Limit: ±40mA Typical
- Input Common Mode Range: 0V to 10V
- Output Voltage Range: 1V to (VCC – 1V)
- Differential Gain Stage with High Impedance Output
- (gm Stage)
- Quiescent Current (from VCC): 2mA
- Unloaded Gain: 30,000 Typical
Switching Regulator - Generates VCC Up to 35V
- Wide Operating Supply Range: 2.5V to 16V
- High Switching Frequency: 1.3MHz
- Internal Schottky Diode
- Tiny External Components
- Current Mode Switcher with Internal Compensation
- Low Profile (1mm) SOT-23 Package
Typical Application
Description
The LT3469 is a transconductance (gm) amplifier that can drive outputs up to 33V from a 5V or 12V supply. An internal switching regulator generates a boosted supply voltage for the gm amplifier. The amplifier can drive capacitive loads in the range of 5nF to 300nF. Slew rate is limited only by the maximum output current. The 35V output voltage capability of the switching regulator, along with the high supply voltage of the amplifier, combine to allow the wide output voltage range needed to drive a piezoceramic microactuator.
The LT3469 switching regulator switches at 1.3MHz, allowing the use of tiny external components. The output capacitor can be as small as 0.22µF, saving space and cost versus alternative solutions.
The LT3469 is available in a low profile ThinSOT 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 |
|---|---|---|---|---|---|
| LT3469ETS8#PBF | SOT-23 | TS8 | E | 05-08-1637 | Yes |
| LT3469ETS8#TRMPBF | SOT-23 | TS8 | E | 05-08-1637 | Yes |
| LT3469ETS8#TRPBF | SOT-23 | TS8 | E | 05-08-1637 | 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 | |
|---|---|---|---|---|---|---|
| LT3469ETS8#PBF | SOT-23 | E | $2.45 | Yes | ||
| LT3469ETS8#TRMPBF | SOT-23 | E | $2.45 | $1.73 | Yes | |
| LT3469ETS8#TRPBF | SOT-23 | E | $2.45 | $1.71 | 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 |
|---|---|---|---|
| DC630A | LT3469ETS8 | Piezoceramic Microactuator Driver with Boost Regulator, Input+, 0V to 3V, Vin = 5V or 12V, Vout = 1V to 33V | $75.00 | |
| Buy Now | |||
Applications
- Piezo Speakers
- Piezo Microactuators
- Varactor Bias
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LT3469
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.
