LTC3115-2IDE#TRPBF - 40V, 2A Sync Buck-Boost | Analog Devices
料号： LTC3115-2IDE#TRPBF ✓ 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 |
LTC3115-2IDE#TRPBF 概述
A buck-boost DC/DC converter is a type of 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 vary above and below the desired rail. The LTC3115-2 belongs to the family of synchronous buck-boost converters, which use active switches instead of diodes to improve efficiency, and it is part of the broader category of power management ICs.
Key features include a proprietary low noise switching algorithm that minimizes output voltage ripple, a programmable switching frequency from 300kHz to 2MHz, and a SYNC pin for external clock synchronization. The device also offers a power good output, soft-start, and short-circuit protection. Its wide input voltage range and high efficiency make it suitable for automotive and industrial power supplies, where input transients are common.
The LTC3115-2 uses a current-mode control architecture with a 4-switch topology, enabling seamless transition between buck and boost modes. The device is designed to handle fast input voltage transients without output disruption, making it distinct from the LTC3115-1, which is recommended for general-purpose applications. The IC includes internal compensation and requires minimal external components.
Typical applications include automotive power supplies for infotainment and ADAS, industrial sensors and actuators, battery-powered equipment, and point-of-load regulation in systems with wide input voltage variations. Its ability to maintain regulation during cranking or load dumps makes it particularly valuable in automotive environments.
When designing with this device, ensure proper PCB layout with low-inductance paths for the switching nodes and adequate thermal vias for the exposed pad. The switching frequency should be chosen to balance efficiency and component size, and the inductor value must be selected according to the datasheet guidelines to maintain stability.
直接替换替代料： LTC3115-2IDE#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：
LTC3115IDHD-2#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115EDHD-1#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3115IDHD-1#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3115-2IDE#TRPBF 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 | 2.7V to 40V |
| 输入电压范围 | 2.7V to 40V |
| 最大输出电流 | 2A |
| 开关频率 | 300kHz to 2MHz |
| 同步整流器 | Yes |
| 封装 | 16-WFDFN Exposed Pad |
| 工作温度范围 | -40°C to +125°C |
| 安装类型 | Surface Mount |
| 输出数量 | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 2.7V |
| Voltage - Output (Max) | 40V |
| Current - Output | 2A |
| Frequency - Switching | 300kHz ~ 2MHz |
| 同步整流器 | Yes |
| RoHS 状态 | Compliant |
LTC3115-2IDE#TRPBF 引脚配置
| 引脚 1 | SW1 — Switch node connection for the buck-boost inductor |
| 引脚 2 | PVIN — Power input supply |
| 引脚 3 | PVIN — Power input supply |
| 引脚 4 | GND — Ground |
| 引脚 5 | GND — Ground |
| 引脚 6 | SW2 — Switch node connection for the buck-boost inductor |
| 引脚 7 | PVOUT — Power output |
| 引脚 8 | PVOUT — Power output |
| 引脚 9 | VOUT — Output voltage sense |
| 引脚 10 | VFB — Feedback input for output voltage regulation |
| 引脚 11 | ITH — Error amplifier output for compensation |
| 引脚 12 | FREQ — Switching frequency programming |
| 引脚 13 | SYNC — External clock synchronization input |
| 引脚 14 | RUN — Enable input |
| 引脚 15 | PGOOD — Power good output |
| 引脚 16 | VIN — Input supply for internal circuitry |
典型应用
LTC3115-2IDE#TRPBF 适用于 6 应用s: Automotive Power Supplies, Industrial Power Supplies, Battery-Powered Equipment, Point-of-Load Regulation, Telecom and Networking Equipment, Medical Devices.
Automotive Power Supplies
The LTC3115-2IDE#TRPBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range and ability to handle fast input transients. It maintains output regulation during cranking and load dump conditions, making it suitable for infotainment systems, ADAS, and body control modules. The synchronous buck-boost topology ensures high efficiency across the entire battery voltage range, reducing heat dissipation in the vehicle's confined spaces.
推荐
Industrial Power Supplies
In industrial environments, input voltages can vary widely due to long cable runs and noisy machinery. The LTC3115-2IDE#TRPBF's 2.7V to 40V input range and fast transient response ensure stable output for sensors, actuators, and PLCs. Its programmable switching frequency allows optimization for EMI and efficiency, and the power good output simplifies sequencing in multi-rail systems. The device's robust design handles industrial temperature ranges and transient conditions.
推荐
Battery-Powered Equipment
For battery-powered devices, the LTC3115-2IDE#TRPBF efficiently regulates output as the battery voltage declines. Its buck-boost capability allows the full battery voltage range to be utilized, extending runtime. The low quiescent current and high efficiency at light loads are beneficial for portable instruments and wireless sensors. The small 16-WFDFN package saves board space, and the SYNC pin helps avoid interference in sensitive analog circuits.
推荐
Point-of-Load Regulation
The LTC3115-2IDE#TRPBF can be used as a point-of-load regulator in systems with a wide input voltage range, such as those powered by 12V or 24V buses. It provides a regulated output for FPGAs, microcontrollers, and analog circuits. Its fast transient response ensures minimal voltage deviation during load steps, and the programmable frequency allows synchronization to avoid beat frequencies. The device's integrated switches reduce external component count.
推荐
Telecom and Networking Equipment
In telecom and networking equipment, input voltages can range from 12V to 48V. The LTC3115-2IDE#TRPBF's wide input range and high efficiency make it suitable for powering line cards, switches, and routers. Its ability to handle fast transients ensures reliable operation during hot-swap events. The SYNC pin allows multiple converters to operate at the same frequency, reducing EMI and simplifying filtering.
推荐
Medical Devices
Medical devices often require reliable power from batteries or adapters with varying voltages. The LTC3115-2IDE#TRPBF provides a stable output for sensitive electronics, and its low noise operation is beneficial for diagnostic equipment. The wide input range accommodates different power sources, and the small package is suitable for portable devices. The device's robust design meets the reliability requirements of medical applications.
推荐
推荐产品汇总
工程参考数据： LTC3115-2IDE#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 | LTC3115IDHD-2#PBF | LTC3115IFE-2#TRPBF | LTC3115EDHD-1#TRPBF |
|---|---|---|---|---|
| Package | 16-WFDFN Exposed Pad | 16-WFDFN Exposed Pad | 20-TSSOP Exposed Pad | 16-WFDFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V |
| Output Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V |
| Maximum Output Current | 2A | 2A | 2A | 2A |
| Switching Frequency | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz |
| Optimized for Fast Transients | Yes | Yes | Yes | No |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
关键差异点
- Optimized for fast input transients （对比 LTC3115EDHD-1#TRPBF)
- Wide input and output voltage range （对比 LTC3115IFE-2#TRPBF)
- Synchronous buck-boost topology （对比 LTC3115EDHD-1#TRPBF)
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 SW1 and SW2 pins to minimize parasitic inductance. Ensure a solid ground plane and use thermal vias under the exposed pad for heat dissipation.
The LTC3115-2IDE#TRPBF can dissipate significant power at high input-output differentials and 2A load. The 16-WFDFN package has a thermal resistance of approximately 40°C/W (theta_JA) with proper PCB layout. Ensure adequate copper area and thermal vias to keep the junction temperature below 125°C. For high-power applications, consider using the 20-TSSOP package variant which may have better thermal performance.
Do not exceed the absolute maximum input voltage of 40V. The SYNC pin should be tied to ground or a logic level if not used. The RUN pin must be pulled high to enable the device. Ensure the feedback resistors are placed close to the VFB pin and use 1% tolerance or better. The compensation network on ITH should be selected according to the datasheet for stable operation across the operating range.
合规信息
RoHS compliance indicated in product documentation. AEC-Q100 qualification not specified for this part.
