LT3469

PRODUCTION

Piezo Microactuator Driver with Boost Regulator

Data Sheet Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.23

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Overview

Amplifier

Current Limit: ±40mA Typical
Input Common Mode Range: 0V to 10V
Output Voltage Range: 1V to (V_CC – 1V)
Differential Gain Stage with High Impedance Output
(g_m Stage)
Quiescent Current (from V_CC): 2mA
Unloaded Gain: 30,000 Typical

Switching Regulator

Generates V_CC 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 (g_m) 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 g_m 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

Part Models: 2
1ku List Price: Starting From $2.23

Documentation

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	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3469ETS8#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

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.