The LT3469ETS8 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 LT3469ETS8 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 LT3469ETS8 is available in a low profile ThinSOT™ package.
Feature
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
Applications
Piezo Speakers
Piezo Microactuators
Varactor Bias
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
