LTC3114EFE#PBF - 40V, 1A Sync Buck-Boost DC/DC | Analog Devices
料号： LTC3114EFE#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.36 | $7.36 |
| 10 | $6.8 | $68.00 |
| 100 | $6.2 | $620.00 |
| 500 | $5.6 | $2,800.00 |
| 1,000 | $5.1 | $5,100.00 |
LTC3114EFE#PBF 概述
A buck-boost converter is a type of DC-DC switching regulator that can step up or step down an input voltage to produce a regulated output voltage, regardless of whether the input is higher or lower than the output. This makes it ideal for battery-powered applications where the battery voltage may vary above and below the desired rail. The LTC3114-1's proprietary buck-boost PWM control circuitry delivers low noise operation across the entire operating voltage range, ensuring clean power delivery.
Key features include a wide input voltage range of 2.2V to 40V, adjustable output from 2.7V to 40V, 1A continuous output current, and programmable average output current limit. The synchronous rectification provides high efficiency, and the low noise PWM control minimizes output ripple. The device also includes internal compensation, soft-start, and thermal shutdown protection.
Technically, the LTC3114-1 uses a current-mode, fixed-frequency PWM architecture that seamlessly transitions between buck and boost modes, maintaining regulation without output glitches. The programmable average output current feature allows designers to set a precise current limit, protecting the load and source. The exposed pad enhances thermal performance, allowing higher power dissipation in a small footprint.
Typical applications include automotive power supplies, industrial instrumentation, portable devices, and battery-powered systems where a stable rail is needed from a varying input source. The wide input range makes it suitable for 12V and 24V industrial buses, as well as multi-cell Li-ion battery stacks.
When designing with this device, ensure proper PCB layout with short, low-inductance paths for the switching nodes and adequate input/output capacitance to minimize voltage ripple. The exposed pad should be soldered to a large copper area for effective heat dissipation.
直接替换替代料： LTC3114EFE#PBF ——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：
LTC3114EFE-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3114HFE-1#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3114IFE-1#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3114MPFE-1#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3114EFE#PBF 最大额定值与电气特性
| 功能 | Buck-Boost |
| 输出类型 | Adjustable |
| 输出电压范围 | 2.7 V to 40 V |
| 输入电压范围 | 2.2 V to 40 V |
| 最大输出电流 | 1 A |
| 输出数量 | 1 |
| 同步整流器 | Yes |
| Control Architecture | Current Mode PWM |
| 封装 | 16-TSSOP Exposed Pad |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +125C |
| RoHS 状态 | Compliant |
| Lead Free | Yes |
LTC3114EFE#PBF 引脚配置
| 引脚 1 | SW — Switch node connection |
| 引脚 2 | PVIN — Power input supply |
| 引脚 3 | VIN — Input supply sense |
| 引脚 4 | RUN — Enable input |
| 引脚 5 | ITHR — Current threshold adjust |
| 引脚 6 | VOUT — Output voltage sense |
| 引脚 7 | FB — Feedback input |
| 引脚 8 | VC — Compensation node |
| 引脚 9 | GND — Ground |
| 引脚 10 | PGND — Power ground |
| 引脚 11 | SW — Switch node connection |
| 引脚 12 | PVOUT — Power output |
| 引脚 13 | VOUT — Output voltage |
| 引脚 14 | SS — Soft-start |
| 引脚 15 | MODE — Mode select |
| 引脚 16 | PG — Power good output |
典型应用
LTC3114EFE#PBF 适用于 6 应用s: Battery-Powered Portable Devices, Industrial Power Supplies, Automotive Electronics, RF and Analog Power Supplies, Medical Devices, IoT and Smart Home Devices.
Battery-Powered Portable Devices
The LTC3114EFE#PBF is ideal for battery-powered devices where the battery voltage varies above and below the required rail. Its wide 2.2V to 40V input range and 1A output ensure a stable supply for microcontrollers, sensors, and wireless modules. The low-noise PWM control minimizes interference with sensitive analog circuits, and the high efficiency extends battery life. For example, in a 2-cell Li-ion application (5.4V to 8.4V), the converter can maintain a 5V rail efficiently. The programmable output current limit protects the battery from overcurrent conditions.
推荐
Industrial Power Supplies
In industrial environments, input voltages can fluctuate widely due to long cable runs and noisy machinery. The LTC3114EFE#PBF's 40V input rating and buck-boost topology make it suitable for 12V and 24V industrial buses, providing a regulated output for control electronics. Its programmable average output current allows precise current limiting to protect downstream circuits. The synchronous rectification ensures high efficiency, reducing heat dissipation in sealed enclosures. The device's wide temperature range (-40C to +125C) ensures reliable operation in harsh conditions.
推荐
Automotive Electronics
Automotive systems require power converters that can handle cranking voltage dips and load dump spikes. The LTC3114EFE#PBF's 40V input tolerance and buck-boost operation make it suitable for automotive power rails, such as powering infotainment systems or sensors from a 12V battery that can drop to 6V during cranking. The low-noise output is critical for audio and RF systems. The device's thermal performance, with exposed pad, allows operation in high-temperature under-hood environments. The programmable current limit helps protect wiring and connectors.
推荐
RF and Analog Power Supplies
The LTC3114EFE#PBF's low-noise PWM control makes it suitable for powering RF transceivers, PLLs, and precision analog circuits. Its buck-boost capability ensures a clean, stable supply even when the input source varies, such as in battery-operated test equipment. The output voltage can be set to match the requirements of the analog load, and the programmable current limit provides protection. The synchronous rectification reduces switching noise, and the wide input range accommodates various power sources. This makes it ideal for portable RF instruments and communication devices.
推荐
Medical Devices
Medical devices often run on batteries and require reliable, low-noise power supplies. The LTC3114EFE#PBF's wide input range and buck-boost operation ensure a stable output as batteries discharge. Its low-noise characteristics are essential for sensitive measurement circuits, such as ECG or glucose monitors. The programmable output current limit adds a safety feature, preventing overcurrent conditions. The compact TSSOP package is suitable for space-constrained designs, and the device's reliability meets the demands of medical applications.
推荐
IoT and Smart Home Devices
IoT devices often use batteries or energy harvesting, where the input voltage can vary significantly. The LTC3114EFE#PBF's buck-boost topology allows it to maintain a regulated output from a wide range of input sources, such as solar cells or multi-cell batteries. Its low quiescent current and high efficiency extend battery life, crucial for wireless sensors. The programmable current limit protects the energy source. The small package and low external component count make it ideal for compact IoT modules.
推荐
推荐产品汇总
工程参考数据： LTC3114EFE#PBF ——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 | LTC3114EFE-1#PBF | LTC3114HFE-1#PBF | LTC3114IFE-1#PBF | LTC3114MPFE-1#PBF | TPS63070RNMT |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | VQFN-15 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.5V to 12V |
| Output Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.5V to 12V |
| Maximum Output Current | 1A | 1A | 1A | 1A | 1A | 2A |
| Operating Temperature Range | -40C to +125C | -40C to +125C | -40C to +150C | -40C to +125C | -55C to +150C | -40C to +125C |
| Synchronous Rectification | Yes | Yes | Yes | Yes | Yes | Yes |
| Programmable Output Current | Yes | Yes | Yes | Yes | Yes | No |
关键差异点
- Wide input voltage range up to 40V （对比 TPS63070RNMT)
- Programmable average output current （对比 TPS63070RNMT)
- Same-package drop-in variants for temperature grades （对比 LTC3114EFE-1#PBF)
设计说明
For optimal performance, place the input and output capacitors as close as possible to the PVIN and PVOUT pins. Use low-ESR ceramic capacitors (e.g., 10uF) to minimize voltage ripple. The switch node (SW) should have a short, wide trace to reduce parasitic inductance and EMI. The exposed pad must be soldered to a large copper area for heat dissipation.
The LTC3114EFE#PBF can dissipate significant power at high input-output differentials. For example, at VIN=5V, VOUT=12V, and 1A load, the power loss is approximately 7W (assuming 85% efficiency). The 16-TSSOP package with exposed pad has a thermal resistance of about 40C/W; ensure adequate copper area or airflow to keep the junction temperature below 125C.
Do not exceed the absolute maximum input voltage of 40V. Ensure the feedback resistors are 1% tolerance to maintain output accuracy. The RUN pin should be tied to VIN if not used. The ITHR pin sets the average output current limit; leave it floating or connect a resistor to ground to set the desired limit. Incorrect setting can cause premature current limiting or overcurrent damage.
合规信息
RoHS compliant and lead-free per #PBF suffix. Not AEC-Q100 qualified; for automotive, consider the LTC3114HFE-1#PBF or MPFE variants if available.
