LTC3115-2EFE#PBF - 40V, 2A Sync Buck-Boost DC/DC | Analog Devices
料号： LTC3115-2EFE#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.99 | $9.99 |
| 10 | $8.95 | $89.50 |
| 100 | $7.85 | $785.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.25 | $6,250.00 |
LTC3115-2EFE#PBF 概述
A buck-boost converter is a type of DC-DC converter 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 vary above and below the desired rail. The LTC3115-2 belongs to the family of switching regulators, which are power management ICs that use inductive energy storage to achieve high efficiency, often exceeding 90%.
Key features of the LTC3115-2 include a 2A output current capability, a wide 2.7V to 40V input and output range, and a switching frequency programmable from 400kHz to 2MHz. It also features Burst Mode operation for high efficiency at light loads, a 3µA shutdown current, output disconnect in shutdown, short-circuit protection, and internal soft-start. The device is designed to handle fast input voltage transients, making it suitable for automotive and industrial applications where supply voltage can fluctuate rapidly.
The LTC3115-2 uses a current-mode control architecture with a 4-switch synchronous rectifier topology, which minimizes conduction losses and improves efficiency across a wide load range. The device integrates the power switches, reducing external component count and simplifying PCB layout. Its programmable switching frequency allows designers to optimize efficiency versus component size, and the SYNC pin enables synchronization to an external clock for noise-sensitive applications.
Typical applications include automotive power supplies, industrial instrumentation, portable devices, and battery-powered systems where a stable output voltage is required from a varying input source. The LTC3115-2 is particularly well-suited for systems that experience fast input voltage transients, such as those in automotive load-dump conditions or industrial power rails.
When designing with the LTC3115-2, it is important to select the inductor and output capacitors according to the datasheet guidelines to ensure stability and optimal transient response. The exposed pad should be soldered to a large copper area for effective heat dissipation, especially at high output currents.
直接替换替代料： LTC3115-2EFE#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#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115EFE-2#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115EFE-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115EFE-2#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115EFE-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115-2EFE#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 | 400kHz to 2MHz (Programmable) |
| 同步整流器 | Yes |
| Burst Mode Operation | Yes |
| 关断电流 | 3µA |
| Output Disconnect in Shutdown | Yes |
| Short-Circuit Protection | Yes |
| Internal Soft-Start | Yes |
| 封装 | 20-Lead TSSOP (FE16) with Exposed Pad |
| 工作温度范围 | -40°C to +125°C |
| RoHS Compliant | Yes |
| 安装类型 | Surface Mount |
LTC3115-2EFE#PBF 引脚配置
| 引脚 1 | SW1 — Switch node connection for the buck-boost converter |
| 引脚 2 | PVIN1 — Power input supply |
| 引脚 3 | PVIN2 — Power input supply |
| 引脚 4 | VIN — Input supply for internal circuitry |
| 引脚 5 | RUN — Enable pin (active high) |
| 引脚 6 | SYNC — External clock synchronization input |
| 引脚 7 | MODE — Mode selection (Burst Mode or PWM) |
| 引脚 8 | ITH — Error amplifier output for loop compensation |
| 引脚 9 | FB — Feedback input for output voltage regulation |
| 引脚 10 | VOUT — Output voltage sense |
| 引脚 11 | PVOUT1 — Power output |
| 引脚 12 | PVOUT2 — Power output |
| 引脚 13 | SW2 — Switch node connection for the buck-boost converter |
| 引脚 14 | PGND — Power ground |
| 引脚 15 | PGND — Power ground |
| 引脚 16 | SGND — Signal ground |
| 引脚 17 | SS — Soft-start programming pin |
| 引脚 18 | FREQ — Switching frequency programming pin |
| 引脚 19 | VCC — Internal regulated supply output |
| 引脚 20 | EXPOSED PAD — Exposed pad for thermal dissipation, connect to ground |
典型应用
LTC3115-2EFE#PBF 适用于 6 应用s: Automotive Power Supplies, Industrial Instrumentation, Portable Devices, Battery-Powered Systems, Telecom and Networking, Medical Devices.
Automotive Power Supplies
The LTC3115-2EFE#PBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range and ability to handle fast input voltage transients, such as load-dump conditions. It provides a regulated output voltage for various automotive systems, including infotainment, ADAS, and body control modules. Its high efficiency and robust protection features ensure reliable operation in harsh automotive environments.
推荐
Industrial Instrumentation
In industrial instrumentation, the LTC3115-2EFE#PBF provides a stable output voltage from a varying input source, such as a 24V industrial bus. Its wide input range and programmable switching frequency allow designers to optimize efficiency and component size. The device's fast transient response ensures stable operation in systems with rapidly changing loads, making it suitable for sensors, actuators, and control systems.
推荐
Portable Devices
The LTC3115-2EFE#PBF is well-suited for portable devices that require a regulated output voltage from a battery that can vary above and below the desired rail. Its Burst Mode operation and low shutdown current (3µA) help extend battery life. The device's small 20-lead TSSOP package and high efficiency make it ideal for space-constrained applications such as handheld instruments and portable medical devices.
推荐
Battery-Powered Systems
For battery-powered systems, the LTC3115-2EFE#PBF provides a regulated output voltage from a battery whose voltage can drop below the required level. Its wide input range and high efficiency ensure maximum battery life. The device's low shutdown current and Burst Mode operation are particularly beneficial for standby and light-load conditions, making it ideal for IoT devices, remote sensors, and wireless modules.
推荐
Telecom and Networking
In telecom and networking equipment, the LTC3115-2EFE#PBF provides a stable output voltage from a wide input range, such as 12V or 24V backplane supplies. Its programmable switching frequency allows synchronization to external clocks to minimize noise interference. The device's high efficiency and thermal performance make it suitable for continuous operation in rack-mounted systems.
推荐
Medical Devices
The LTC3115-2EFE#PBF is suitable for medical devices that require a reliable and regulated power supply from a battery or DC source. Its wide input range and high efficiency ensure consistent performance, while its low shutdown current helps preserve battery life in portable medical equipment. The device's robust protection features, including short-circuit protection and thermal shutdown, enhance safety in critical applications.
推荐
推荐产品汇总
工程参考数据： LTC3115-2EFE#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#PBF |
|---|---|---|
| Package | 20-Lead TSSOP (FE16) | 20-Lead TSSOP (FE16) |
| Brand | Analog Devices | Analog Devices |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V |
| Output Current | 2A | 2A |
| Switching Frequency | 400kHz to 2MHz | 400kHz to 2MHz |
| Burst Mode | Yes | Yes |
| Shutdown Current | 3µA | 3µA |
| Optimized for Fast Transients | Yes | No |
关键差异点
- Optimized for fast input voltage transients （对比 LTC3115EFE-1#PBF)
- Wide input and output voltage range （对比 LTC3115EFE-1#PBF)
- High efficiency with Burst Mode （对比 LTC3115EFE-1#PBF)
设计说明
For optimal thermal performance, solder the exposed pad of the 20-lead TSSOP package to a large copper area on the PCB. Use multiple vias to connect the pad to the ground plane, which helps dissipate heat and reduce thermal resistance. Ensure adequate copper pour for high current paths, especially for the input and output power connections.
Keep the switching node (SW1, SW2) traces short and wide to minimize parasitic inductance and EMI. Place the input and output capacitors as close as possible to the IC pins. Use a ground plane to provide a low-impedance return path for high-frequency currents. Separate the power ground (PGND) from the signal ground (SGND) to avoid noise coupling.
Do not exceed the absolute maximum ratings for input voltage (40V) and output voltage (40V). Ensure the inductor is rated for the peak current and saturation current. Use appropriate compensation components on the ITH pin to ensure loop stability. Verify the soft-start capacitor value to control inrush current during startup.
合规信息
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
