LT3469ETS8#TRPBF - 33V Piezo Driver with Boost Regulator
料号： LT3469ETS8#TRPBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.791 | $4.79 |
| 10 | $4.791 | $47.91 |
| 100 | $4.791 | $479.10 |
| 500 | $4.791 | $2,395.50 |
| 1,000 | $4.791 | $4,791.00 |
LT3469ETS8#TRPBF 概述
A transconductance amplifier is an amplifier category that converts an input voltage into an output current. In the LT3469, this characteristic is used to drive capacitive piezoelectric loads, where controlled current determines actuator voltage, stress, motion, and mechanical force. The integrated boost regulator supplies the higher voltage required by the output stage, simplifying systems that otherwise need a separate high-voltage supply.
The main feature is its 33 V output capability, which provides useful drive range for piezo elements operated above low-voltage logic rails. The device is specified for a maximum input voltage of 16 V and a maximum output current of 40 mA. Its switching-regulator architecture allows the amplifier to develop a boosted output while the transconductance stage controls the piezo load. Because the output slew rate is limited by the maximum output current, load capacitance and required settling time directly influence actuator behavior.
Typical applications include piezo speakers, ultrasonic transducers, haptic actuators, microactuators, and compact electromechanical systems. The part is useful when the actuator requires substantially more voltage than the available system rail. Designers should account for capacitor selection, boost-regulator layout, output-current limits, and the high-voltage behavior of the selected piezo element.
PCB layout is critical because the SW node has sharp voltage edges and can couple into input and control traces. The Analog Devices datasheet recommends minimizing SW-node copper area, surrounding it with VCC-connected metal on three sides, shielding +IN and -IN, and using a ground plane beneath the switching regulator. Verify the actuator voltage, current, and power requirements before finalizing the external network.
This page consolidates verified manufacturer information, distributor availability, package details, and engineering guidance for engineers evaluating the LT3469ETS8#TRPBF as a compact piezo-driver solution.
直接替换替代料： LT3469ETS8#TRPBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
LT3469ETS8#TRMPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT3469ETS8
✅ 直接替换📋 参考替代料（不在目录中）
LT3469ETS8#TR
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LT3469ETS8#TRPBF
✅ 直接替换✓ 有现货
$4.791 / 个
查看数据手册 →LT3469ETS8#TRMPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT3469ETS8#TRPBF 最大额定值与电气特性
| Product Type | Transconductance amplifier with integrated boost regulator |
| Maximum Output Voltage | 33 V |
| 最大输出电流 | 40 mA |
| Maximum Input Voltage | 16 V |
| Supported Supply Examples | 5 V or 12 V |
| Capacitive Load Range | 5 nF to 300 nF |
| 输出数量 | 1 |
| Number of Terminals | 8 |
| 封装 | TSOT-23-8 |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40°C to +85°C |
| Temperature Grade | Commercial Extended |
| Application | Piezo speakers and microactuators |
| Output Architecture | Boosted transconductance output |
| Slew Rate | Limited by maximum output current |
| Switching Node | SW |
| Manufacturer | Analog Devices |
| Compliance | RoHS-compliant status is listed by a distributor cross-reference result; REACH status is unknown |
LT3469ETS8#TRPBF tsot-23-8 引脚配置指南
LT3469ETS8#TRPBF（tsot-23-8 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： LT3469ETS8#TRPBF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LT3469ETS8#TRPBF 适用于 6 应用s: Piezo Speaker Drive, Ultrasonic Transducer Excitation, Piezo Haptic Actuator, Microactuator Control, Portable Electroacoustic Systems, Battery-Powered Measurement Systems.
Piezo Speaker Drive
The LT3469ETS8#TRPBF fits piezo speakers because it combines a transconductance amplifier with an internal boost regulator capable of outputs up to 33 V from a 5 V or 12 V supply. The amplifier controls current into the capacitive speaker, so the voltage waveform and mechanical response can be adjusted without relying on a low-voltage logic rail directly driving the element. The cited load range is 5 nF to 300 nF, making actuator capacitance an important design check. The 40 mA maximum output current limits fast charging of larger elements, and the drive frequency, voltage, and power must remain within the speaker’s ratings. Use the manufacturer’s recommended external components and protect against actuator breakdown if the design permits it.
推荐
Ultrasonic Transducer Excitation
The LT3469ETS8#TRPBF can be used to excite ultrasonic transducers whose impedance is primarily capacitive and whose required voltage exceeds the system supply. Its boosted 33 V output capability provides more drive headroom than a 5 V or 12 V rail, while the transconductance stage regulates output current into the transducer. The transducer should be checked for allowable voltage, capacitance, current, and frequency. Because the output slew rate is limited by maximum output current, large capacitive loads or fast waveforms can require more settling time. The internal switching regulator also requires careful SW-node layout to prevent coupling into the +IN and -IN control paths.
推荐
Piezo Haptic Actuator
For compact haptic systems, the LT3469ETS8#TRPBF provides a dedicated way to drive a piezo actuator from a lower-voltage system rail. The integrated boost stage can generate output levels up to 33 V, while the transconductance amplifier controls the current delivered to the capacitive element and therefore influences force response and settling behavior. A haptics design should compare actuator capacitance with the supported 5 nF to 300 nF range and calculate peak current for each waveform. The 40 mA output-current ceiling is especially important when producing sharp tactile transitions. Mechanical mounting, dielectric aging, and actuator voltage limits should be validated in the final mechanical and electrical test.
推荐
Microactuator Control
The LT3469ETS8#TRPBF is applicable to microactuators requiring higher drive voltage than the available control or logic supply. Its integrated boost regulator removes the need for a separate dedicated high-voltage rail, while the transconductance amplifier supplies controlled current to the actuator. This can simplify compact assemblies where the actuator is capacitive and the available board area is limited. The design must still respect the package’s switching-node layout recommendations and verify the actuator’s maximum voltage, current, and mechanical travel. Since a larger capacitance demands more charge and current, the 5 nF to 300 nF load range should be confirmed against the chosen element before final component values are frozen.
推荐
Portable Electroacoustic Systems
The LT3469ETS8#TRPBF can support portable electroacoustic products that use a piezo element while operating from a 5 V or 12 V system rail. The integrated boost function allows the transducer driver to reach up to 33 V without requiring a separate high-voltage supply stage. In a portable design, the switching regulator’s layout and the piezo load’s capacitive current demand are central concerns. Use short SW-node routing, maintain a ground plane beneath the switching section, and shield the input signal paths as directed by the Analog Devices datasheet. Validate audio quality, actuator heating, battery current, and startup behavior under the intended waveform rather than relying only on nominal output voltage.
推荐
Battery-Powered Measurement Systems
The LT3469ETS8#TRPBF is useful in battery-powered measurement equipment that must interrogate a capacitive piezo sensor or actuator from a compact supply. A 5 V or 12 V input can support boosted output operation, reducing the number of external power rails while retaining transconductance-based load control. The measurement engineer must define the required voltage step, settling time, and peak current before selecting the transducer and feedback network. The 40 mA maximum output current remains the primary dynamic limit, and the internal switching regulator can introduce noise if its high-current loop is not laid out carefully. The cited operating range spans -40°C to +85°C by design assurance, with guaranteed LT3469E specifications from 0°C to 85°C.
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工程参考数据： LT3469ETS8#TRPBF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LT3469ETS8#TRMPBF | LT3469ETS8 | LT3469ETS8#TR | LT3469ETS8#TRPBF | LT3469ETS8#TRMPBF |
|---|---|---|---|---|---|---|
| Product Type | Transconductance amplifier with integrated boost regulator | Transconductance amplifier with integrated boost regulator | Transconductance amplifier with integrated boost regulator | Transconductance amplifier with integrated boost regulator | Transconductance amplifier with integrated boost regulator | Transconductance amplifier with integrated boost regulator |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 |
| Number of Terminals | 8 | 8 | 8 | 8 | 8 | 8 |
关键差异点
- Integrated actuator-oriented control function （对比 TPS63060)
- High boosted output capability （对比 LTC3440)
- Purpose-built piezo-load range （对比 MAX8705)
设计说明
The Analog Devices datasheet specifically warns that the SW pin has sharp rise and fall edges. Keep SW copper small, surround the node with VCC-connected metal on three sides, shield the +IN and -IN paths, and maintain a ground plane beneath the switching regulator. These layout measures are especially important because the integrated boost stage can couple switching energy into the transconductance control loop.
Treat the piezo element as a capacitive load and verify that its capacitance falls within the verified 5 nF to 300 nF range. Check the current required for each voltage transition against the 40 mA maximum output current. The datasheet states that slew rate is limited only by maximum output current, so waveform frequency, capacitance, and settling time must be evaluated together rather than selected independently.
Do not assume that a generic boost converter is a direct replacement. The LT3469 includes a transconductance amplifier intended to control current into a piezo load, while converters such as the TPS63060 may regulate a voltage rail without reproducing the actuator interface. Confirm package pinout, signal function, output current, voltage limits, compensation, and actuator behavior before substituting any part.
合规信息
A distributor cross-reference result lists the LT3469 family as RoHS-compliant and halogen-free-compliant. REACH, lead-free status, and conflict-mineral status are not established by the supplied data. The LT3469E datasheet search result states that performance is guaranteed from 0°C to 85°C and assured by design over -40°C to 85°C.
