LTC3115-2IDE#TRPBF - 40V, 2A Sync Buck-Boost | Analog Devices
MPN: LTC3115-2IDE#TRPBF ✓ Hoạt độngLTC3115-2IDE#TRPBF Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho LTC3115-2IDE#TRPBF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
LTC3115IDHD-2#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3115EDHD-1#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3115IDHD-1#PBF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC3115-2IDE#TRPBF Tỷ lệ tối đa & tính chất điện
| Chức năng | Buck-Boost |
| Kiểu đầu ra | Adjustable |
| Khoảng điện áp đầu ra | 2.7V to 40V |
| Phạm vi điện áp đầu vào | 2.7V to 40V |
| Điện áp tối đa đầu ra | 2A |
| Tần số chuyển đổi | 300kHz to 2MHz |
| Cân bằng đồng bộ | Yes |
| Hộp | 16-WFDFN Exposed Pad |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Kiểu lắp đặt | Surface Mount |
| Số lượng đầu ra | 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 |
| Cân bằng đồng bộ | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân LTC3115-2IDE#TRPBF
| Chân 1 | SW1 — Switch node connection for the buck-boost inductor |
| Chân 2 | PVIN — Power input supply |
| Chân 3 | PVIN — Power input supply |
| Chân 4 | GND — Ground |
| Chân 5 | GND — Ground |
| Chân 6 | SW2 — Switch node connection for the buck-boost inductor |
| Chân 7 | PVOUT — Power output |
| Chân 8 | PVOUT — Power output |
| Chân 9 | VOUT — Output voltage sense |
| Chân 10 | VFB — Feedback input for output voltage regulation |
| Chân 11 | ITH — Error amplifier output for compensation |
| Chân 12 | FREQ — Switching frequency programming |
| Chân 13 | SYNC — External clock synchronization input |
| Chân 14 | RUN — Enable input |
| Chân 15 | PGOOD — Power good output |
| Chân 16 | VIN — Input supply for internal circuitry |
Ứng dụng tiêu biểu
LTC3115-2IDE#TRPBF phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC3115-2IDE#TRPBF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Optimized for fast input transients (vsLTC3115EDHD-1#TRPBF)
- Wide input and output voltage range (vsLTC3115IFE-2#TRPBF)
- Synchronous buck-boost topology (vsLTC3115EDHD-1#TRPBF)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliance indicated in product documentation. AEC-Q100 qualification not specified for this part.
