LTC3115-1IDE#PBF - 40V, 2A Buck-Boost DC/DC Converter | Analog Devices
MPN： LTC3115-1IDE#PBF ✓ 啟用中LTC3115-1IDE#PBF 概覽
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 may vary above and below the desired rail. The LTC3115-1 is a synchronous 4-switch topology, which uses internal MOSFETs to achieve high efficiency across a wide load range.
Key features include a programmable output current limit, an internal phase-locked loop for synchronization to an external clock, and a shutdown mode that reduces quiescent current to near zero. The switching frequency is adjustable from 300kHz to 2MHz via an external resistor, allowing designers to optimize efficiency versus component size. The device also offers soft-start to limit inrush current during startup.
Technically, the LTC3115-1 uses a current-mode control architecture with a 4-switch buck-boost topology, enabling seamless transition between buck and boost modes. It achieves efficiencies up to 95% in typical applications. The wide input range and high output current make it suitable for automotive, industrial, and portable applications where input voltage can fluctuate significantly.
Typical applications include automotive power supplies for infotainment and ADAS, industrial sensors and actuators, and battery-powered equipment such as portable instruments and IoT devices. The device's ability to maintain a regulated output from a varying input makes it a versatile choice for power management.
When designing with the LTC3115-1, ensure proper PCB layout with low-inductance ground paths and adequate thermal vias for the exposed pad. The switching node should be kept short to minimize EMI. Also, select the inductor and capacitors according to the datasheet guidelines to achieve stable operation.
直接替換替代品，適用於 LTC3115-1IDE#PBF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
LTC3115IDHD-1#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3115EDHD-1#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3115-2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3115-1IDE#PBF 最大額定值與電氣特性
| 功能 | Buck-Boost |
| 輸出電壓 | 2.7V to 40V (Adjustable) |
| Output Current | 2A |
| 輸入電壓範圍 | 2.7V to 40V |
| 切換頻率 | 300kHz to 2MHz (Programmable) |
| 同步整流器 | Yes |
| 效率 | Up to 95% |
| 工作溫度範圍 | -40°C to 125°C |
| 封裝 | 16-Lead DFN (4mm x 3mm) |
| 安裝類型 | Surface Mount |
| Synchronization | Yes (via PWM/SYNC pin) |
| 軟啟動 | Yes |
| RoHS | Compliant |
LTC3115-1IDE#PBF 腳位配置
| 腳位 1 | SW1 — Switch node 1 |
| 腳位 2 | PVIN — Power input |
| 腳位 3 | VIN — Input voltage sense |
| 腳位 4 | RUN — Enable input |
| 腳位 5 | RT — Switching frequency set |
| 腳位 6 | PWM/SYNC — PWM mode select / sync input |
| 腳位 7 | ITH — Error amplifier output |
| 腳位 8 | FB — Feedback input |
| 腳位 9 | VOUT — Output voltage sense |
| 腳位 10 | PVOUT — Power output |
| 腳位 11 | SW2 — Switch node 2 |
| 腳位 12 | PGND — Power ground |
| 腳位 13 | PGND — Power ground |
| 腳位 14 | PGND — Power ground |
| 腳位 15 | PGND — Power ground |
| 腳位 16 | PGND — Power ground |
典型應用
LTC3115-1IDE#PBF 適用於 6 應用s: Automotive Power Supplies, Industrial Power Supplies, Battery-Powered Equipment, Portable Medical Devices, IoT and Smart Home Devices, Telecom and Networking Equipment.
Automotive Power Supplies
The LTC3115-1IDE#PBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range, which can handle load dumps and transients. It provides a regulated output for infotainment systems, ADAS, and sensors. Its high efficiency reduces heat dissipation in the vehicle's cabin, and its programmable switching frequency allows optimization for EMI compliance.
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Industrial Power Supplies
In industrial applications, the LTC3115-1IDE#PBF provides a stable output from fluctuating input sources such as 24V buses or battery backups. Its wide input range and 2A output current make it suitable for powering sensors, actuators, and microcontrollers. The device's synchronization feature allows it to be used in noise-sensitive environments by locking to an external clock.
推薦
Battery-Powered Equipment
The LTC3115-1IDE#PBF is perfect for battery-powered devices like portable instruments and IoT nodes. It maintains a regulated output even as the battery voltage drops below the output, maximizing usable battery capacity. Its high efficiency (up to 95%) extends battery life, and the shutdown mode reduces quiescent current to near zero for long standby times.
推薦
Portable Medical Devices
For portable medical devices, the LTC3115-1IDE#PBF provides a reliable power supply from batteries or USB sources. Its low noise operation and synchronization capability are beneficial for sensitive analog circuits. The wide input range ensures operation during battery discharge, and the small DFN package saves board space in compact designs.
推薦
IoT and Smart Home Devices
The LTC3115-1IDE#PBF is well-suited for IoT devices that need to operate from a variety of power sources, including batteries, solar panels, or USB. Its wide input range and high efficiency make it ideal for energy harvesting applications. The programmable switching frequency allows designers to avoid interference with wireless communication bands.
推薦
Telecom and Networking Equipment
In telecom and networking equipment, the LTC3115-1IDE#PBF provides a regulated output from a wide input range, such as 12V or 48V buses. Its 2A output current can power FPGAs, processors, and communication modules. The synchronization feature helps reduce EMI in systems with multiple converters.
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推薦產品摘要
工程參考資料，適用於 LTC3115-1IDE#PBF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LTC3115IDHD-1#PBF | LTC3115EDHD-1#PBF | LTC3115IFE-1#PBF | LTC3115EFE-1#PBF | LTC3115-2 | TPS63070RNMT |
|---|---|---|---|---|---|---|---|
| Package | 16-Lead DFN | 16-Lead DFN | 16-Lead DFN | 20-Lead TSSOP | 20-Lead TSSOP | 16-Lead DFN | VQFN-16 |
| Brand | Analog Devices | 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 | 2.7V to 40V | 2V to 16V |
| Output Current | 2A | 2A | 2A | 2A | 2A | 2A | 3A |
| Switching Frequency | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 2.4MHz |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | 0°C to 70°C | -40°C to 125°C | 0°C to 70°C | -40°C to 125°C | -40°C to 125°C |
| Synchronization | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Price (1pc) | $6.50 | $6.50 | $5.80 | $6.20 | $5.50 | $6.80 | $3.50 |
主要差異化特點
- Wide input voltage range (2.7V to 40V) (對比TPS63070RNMT)
- Synchronization capability (對比TPS63070RNMT)
- Industrial temperature grade (對比LTC3115EDHD-1#PBF)
設計說明
For optimal performance, place the input and output capacitors as close as possible to the PVIN and PVOUT pins. Use a low-ESR ceramic capacitor of at least 10uF on the input and output. The exposed pad should be soldered to a large copper area for thermal dissipation.
Keep the switching node (SW1, SW2) traces short and wide to minimize parasitic inductance and EMI. Route the feedback trace away from the switching node to avoid noise coupling. Use a ground plane to provide a low-impedance return path.
The LTC3115-1IDE#PBF can dissipate significant power at high output currents. Ensure adequate thermal vias under the exposed pad to conduct heat to the PCB. For continuous operation at 2A, consider a copper area of at least 1 square inch on the top and bottom layers.
合規資訊
RoHS compliant per 'PBF' suffix. AEC-Q100 qualification not specified in available data.
