LT3469
PRODUCTIONPiezo Microactuator Driver with Boost Regulator
- Part Models
- 2
- 1ku List Price
- Starting From $2.82
Overview
- Amplifier
- 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
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.
Applications
- Piezo Speakers
- Piezo Microactuators
- Varactor Bias
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LT3469ETS8#TRMPBF | 8-Lead SOT-23 | ||
| LT3469ETS8#TRPBF | 8-Lead SOT-23 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT3469
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
LT3469ETS8 | Piezoceramic Microactuator Driver with Boost Regulator, INPUT+, 0V to 3V, VIN = 5V or 12V, VOUT = 1V to 33V