LTC3115-1EFE#PBF - 40V, 2A Sync Buck-Boost DC/DC | Analog Devices
料号： LTC3115-1EFE#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
LTC3115-1EFE#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 systems where the battery voltage can drop below the required rail voltage. The LTC3115-1 belongs to the family of switching regulators, which are more efficient than linear regulators for high-current applications, though they introduce switching noise that must be managed with proper filtering.
Key features of the LTC3115-1 include a proprietary low noise switching algorithm that optimizes efficiency while minimizing output ripple, four internal low resistance N-channel DMOS switches that reduce power losses, and a wide 2.7V to 40V input and output range. The device also offers Burst Mode operation for high efficiency at light loads, a programmable frequency from 300kHz to 2MHz, and a power good output for system monitoring.
The LTC3115-1 uses a current-mode control architecture with a proprietary switching scheme that allows seamless transition between buck, boost, and buck-boost modes. This ensures stable operation across the entire input/output voltage range. The internal DMOS switches have low on-resistance, which minimizes conduction losses and improves overall efficiency, especially at high output currents.
Typical applications include automotive power supplies, industrial power systems, battery-powered equipment, and portable devices where a wide input voltage range and high efficiency are required. The device is well suited for powering sensors, microcontrollers, and other loads that need a stable voltage from a varying input source.
When designing with the LTC3115-1, it is important to select the external inductor and capacitors according to the datasheet guidelines to achieve optimal performance. The switching frequency can be synchronized to an external clock to avoid interference in noise-sensitive applications. Proper PCB layout with short, wide traces for high-current paths is essential to minimize parasitic inductance and ensure stable operation.
直接替换替代料： LTC3115-1EFE#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：
LTC3115EFE-1#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115EFE#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3115-1EFE#PBF 最大额定值与电气特性
| 功能 | Buck-Boost |
| 输出电压 | 2.7V to 40V (Adjustable) |
| Output Current | 2A (max) |
| 输入电压范围 | 2.7V to 40V |
| 开关频率 | 300kHz to 2MHz (programmable) |
| 同步整流 | Yes |
| 输出数量 | 1 |
| 封装 | 20-TSSOP Exposed Pad (FE16) |
| 工作温度范围 | -40°C to +125°C |
| 安装类型 | Surface Mount |
| Control Architecture | Current Mode |
| Low Noise Algorithm | Yes |
| Burst Mode Operation | Yes |
| 电源正常输出 | Yes |
| RoHS 状态 | Compliant |
LTC3115-1EFE#PBF 引脚配置
| 引脚 1 | SW1 — Switch node connection for inductor |
| 引脚 2 | PVIN1 — Power input supply |
| 引脚 3 | PVIN2 — Power input supply |
| 引脚 4 | SHDN — Shutdown control (active low) |
| 引脚 5 | SYNC — External clock synchronization input |
| 引脚 6 | MODE — Mode selection (Burst Mode or PWM) |
| 引脚 7 | PGOOD — Power good output (open-drain) |
| 引脚 8 | VFB — Feedback voltage input |
| 引脚 9 | ITH — Error amplifier output for compensation |
| 引脚 10 | SS — Soft-start programming |
| 引脚 11 | RT — Switching frequency programming |
| 引脚 12 | VCC — Internal supply voltage |
| 引脚 13 | GND — Ground |
| 引脚 14 | GND — Ground |
| 引脚 15 | SW2 — Switch node connection for inductor |
| 引脚 16 | PVOUT1 — Power output supply |
| 引脚 17 | PVOUT2 — Power output supply |
| 引脚 18 | VOUT — Output voltage sense |
| 引脚 19 | VOUT — Output voltage sense |
| 引脚 20 | GND — Ground |
| 引脚 21 | Exposed Pad — Thermal pad, connect to GND |
典型应用
LTC3115-1EFE#PBF 适用于 6 应用s: Automotive Power Supplies, Industrial Power Systems, Battery-Powered Equipment, Portable Medical Devices, Telecom and Networking Equipment, Renewable Energy Systems.
Automotive Power Supplies
The LTC3115-1EFE#PBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range, which accommodates load dumps and cold-crank conditions. It provides a regulated output for sensors, microcontrollers, and infotainment systems. Its high efficiency reduces heat dissipation in the vehicle's confined spaces. The device's low noise operation is critical for sensitive automotive electronics, ensuring reliable performance. With a 2A output capability, it can power multiple loads, and its programmable frequency allows synchronization to avoid interference with other vehicle systems.
推荐
Industrial Power Systems
In industrial settings, the LTC3115-1EFE#PBF handles wide input voltage variations from 24V buses and provides a stable output for control electronics. Its 2A output current can drive actuators and sensors, while the wide temperature range (-40°C to +125°C) ensures operation in harsh environments. The device's high efficiency reduces energy costs and thermal management requirements. The power good output enables system monitoring and sequencing, and the programmable frequency allows optimization for EMI compliance. Its robust design makes it suitable for factory automation and process control.
推荐
Battery-Powered Equipment
The LTC3115-1EFE#PBF is perfect for battery-powered equipment because it can step up or step down the battery voltage to maintain a regulated output as the battery discharges. Its Burst Mode operation reduces quiescent current, extending battery life. The wide input range (2.7V to 40V) supports various battery chemistries, including Li-Ion and lead-acid. The 2A output can power motors, displays, and wireless modules. The low noise output is essential for RF and audio circuits, and the small TSSOP package saves board space in portable devices.
推荐
Portable Medical Devices
The LTC3115-1EFE#PBF is suitable for portable medical devices that require a stable power supply from batteries. Its low noise output is critical for sensitive analog front-ends in patient monitoring equipment. The wide input range accommodates battery voltage variations, and the high efficiency extends battery life. The device's small footprint is ideal for compact designs. The power good output can be used for system status indication. The operating temperature range covers clinical environments, and the device's reliability meets medical standards.
推荐
Telecom and Networking Equipment
In telecom and networking equipment, the LTC3115-1EFE#PBF provides a regulated supply from a wide input range, such as 12V or 24V buses. Its 2A output can power line cards, processors, and communication modules. The low noise operation is essential for maintaining signal integrity in high-speed data transmission. The device's high efficiency reduces heat in densely packed racks. The programmable frequency allows synchronization to system clocks, minimizing EMI. The power good output enables fault monitoring, and the wide temperature range ensures reliable operation in central offices.
推荐
Renewable Energy Systems
The LTC3115-1EFE#PBF is used in renewable energy systems, such as solar-powered devices, where input voltage varies with sunlight intensity. Its buck-boost capability ensures a stable output even when the solar panel voltage drops below the required level. The wide input range (2.7V to 40V) accommodates different panel configurations. The high efficiency maximizes energy harvest, and the low quiescent current in Burst Mode is beneficial for energy storage systems. The device's robust design handles the variable conditions of outdoor environments.
推荐
工程参考数据： LTC3115-1EFE#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 | LTC3115EFE-1#TRPBF | LTC3115EDHD-1#PBF | LTC3115EFE#PBF | LTC3115EDHD#PBF | TPS63070RNMT |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | 16-DFN Exposed Pad | 20-TSSOP Exposed Pad | 16-DFN Exposed Pad | VQFN-15 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2V to 18V |
| Output Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 1.2V to 15V |
| Output Current | 2A | 2A | 2A | 2A | 2A | 3A |
| Switching Frequency | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 2.4MHz |
| Synchronous Rectification | Yes | Yes | Yes | Yes | Yes | Yes |
| Power Good Output | Yes | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Wide input voltage range up to 40V （对比 TPS63070RNMT)
- Proprietary low noise switching algorithm （对比 TPS63070RNMT)
- Programmable switching frequency up to 2MHz （对比 TPS63070RNMT)
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 with adequate voltage rating. The inductor should be placed near the SW pins to minimize parasitic inductance. Ensure a solid ground plane under the device and connect the exposed pad to the ground plane with multiple vias for thermal relief.
The LTC3115-1EFE#PBF can dissipate significant power at high output currents. The exposed pad must be soldered to a large copper area on the PCB to act as a heat sink. For 2A output, ensure the PCB copper area is sufficient to keep the junction temperature below 125°C. Refer to the datasheet thermal impedance values for guidance.
Do not exceed the absolute maximum input voltage of 40V. Ensure the feedback resistor divider is connected correctly to set the desired output voltage. The SYNC pin should be tied to ground or a clock source; leaving it floating may cause erratic operation. Use the soft-start pin to limit inrush current during startup.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, verify with manufacturer.
