LTC3114IDE#PBF - 40V, 1A Buck-Boost DC/DC | Analog Devices
MPN： LTC3114IDE#PBF ✓ 啟用中LTC3114IDE#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. Unlike a buck converter that only steps down or a boost converter that only steps up, a buck-boost converter is essential in battery-powered systems where the battery voltage can vary above and below the desired output rail. The LTC3114-1 uses a proprietary buck-boost PWM control scheme that ensures seamless transitions between buck and boost modes, maintaining low output ripple and high efficiency across the entire input range.
Key features of the LTC3114IDE#PBF include up to 96% efficiency, a low 30µA no-load quiescent current in Burst Mode operation, and current-mode control for fast transient response. The programmable average output current allows the designer to set a current limit, protecting the converter and the load. The device is available in a 16-lead TSSOP package with an exposed pad (FE package), which aids in thermal dissipation. The operating temperature range is -40°C to +125°C, making it suitable for industrial and automotive environments.
The LTC3114-1 integrates synchronous switches, eliminating the need for an external Schottky diode, which reduces component count and improves efficiency. The current-mode architecture provides excellent line and load regulation, while the 1.2MHz switching frequency allows the use of small, low-profile inductors and capacitors, saving PCB area. The device also includes soft-start, overcurrent protection, and thermal shutdown for robust operation.
Typical applications include portable instruments, industrial sensors, battery-powered equipment, and power supplies for FPGAs and microcontrollers where the input voltage can vary widely. The wide input range and high efficiency make it an excellent choice for systems powered by multi-cell batteries or unregulated power sources.
When designing with the LTC3114IDE#PBF, ensure proper PCB layout with short, low-impedance connections for the input, output, and ground paths. Use a 10µH inductor and appropriate input/output capacitors as recommended in the datasheet to achieve optimal performance. The exposed pad should be soldered to a large copper area for effective heat sinking.
直接替換替代品，適用於 LTC3114IDE#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。
LTC3114IFE-1#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3113IDE#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3115IDE#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3114IDE#PBF 最大額定值與電氣特性
| 功能 | Buck-Boost |
| Output Current | 1 A |
| 輸入電壓範圍 | 2.2 V to 40 V |
| 輸出電壓範圍 | 2.7 V to 40 V (adjustable) |
| 切換頻率 | 1.2 MHz |
| 效率 | Up to 96% |
| 靜態電流 | 30 µA (Burst Mode, no load) |
| Control Architecture | Current-mode |
| 封裝 | 16-TSSOP Exposed Pad (FE) |
| 工作溫度範圍 | -40°C to +125°C |
| 同步整流 | Yes |
| Programmable Output Current | Yes |
| 軟啟動 | Yes |
| 過電流保護 | Yes |
| 過熱關機 | Yes |
| RoHS 狀態 | Compliant |
LTC3114IDE#PBF 腳位配置
| 腳位 1 | SW — Switch node connection to inductor |
| 腳位 2 | PVIN — Power input supply |
| 腳位 3 | VIN — Input supply sense |
| 腳位 4 | RUN — Enable input (active high) |
| 腳位 5 | ITHR — Current threshold adjust |
| 腳位 6 | VOUT — Output voltage sense |
| 腳位 7 | PVOUT — Power output |
| 腳位 8 | GND — Ground |
| 腳位 9 | GND — Ground |
| 腳位 10 | FB — Feedback input |
| 腳位 11 | VC — Compensation node |
| 腳位 12 | SS — Soft-start timing |
| 腳位 13 | MODE — Mode select (PWM/Burst) |
| 腳位 14 | SYNC — External clock sync |
| 腳位 15 | PGND — Power ground |
| 腳位 16 | SW — Switch node connection to inductor |
| 腳位 17 | Exposed Pad — Thermal pad, connect to ground |
典型應用
LTC3114IDE#PBF 適用於 6 應用s: Battery-Powered Portable Instruments, Industrial Sensor Power Supplies, FPGA and Microcontroller Power, Automotive Electronics, Portable Medical Devices, Energy Harvesting Systems.
Battery-Powered Portable Instruments
The LTC3114IDE#PBF is ideal for battery-powered portable instruments where the battery voltage can vary above or below the required output rail. Its wide 2.2V to 40V input range and 1A output capability ensure stable operation as the battery discharges. The high efficiency (up to 96%) extends battery life, and the low 30µA quiescent current in Burst Mode is perfect for standby operation. The programmable output current protects the load and battery.
推薦
Industrial Sensor Power Supplies
In industrial environments, sensors often operate from unregulated power sources that can fluctuate. The LTC3114IDE#PBF's buck-boost topology maintains a regulated output even when the input voltage swings above or below the set point. Its 40V input rating handles industrial bus voltages, and the 1.2MHz switching frequency allows for small external components, saving PCB space. The wide -40°C to +125°C temperature range ensures reliable operation in harsh conditions.
推薦
FPGA and Microcontroller Power
FPGAs and microcontrollers often require a stable core voltage from a varying input source, such as a battery or solar panel. The LTC3114IDE#PBF provides up to 1A, sufficient for many low-power FPGAs and MCUs. Its programmable output current allows precise current limiting, protecting the load. The low noise PWM operation minimizes interference with sensitive digital circuits, and the small package fits compact designs.
推薦
Automotive Electronics
Automotive systems experience wide input voltage variations due to cranking, load dumps, and alternator ripple. The LTC3114IDE#PBF's 40V input rating and buck-boost capability make it suitable for automotive power supplies. Its high efficiency reduces heat dissipation, and the extended temperature range (-40°C to +125°C) meets automotive requirements. The programmable output current can protect downstream electronics.
推薦
Portable Medical Devices
Portable medical devices require reliable power from batteries that discharge over time. The LTC3114IDE#PBF ensures a stable output voltage as the battery voltage drops below the required level. Its low noise operation is critical for sensitive medical electronics, and the high efficiency prolongs battery life. The small 16-TSSOP package is suitable for compact medical devices.
推薦
Energy Harvesting Systems
Energy harvesting sources like solar panels and thermoelectric generators produce variable voltages. The LTC3114IDE#PBF's buck-boost topology efficiently converts these variable inputs to a regulated output. Its low quiescent current (30µA) is ideal for energy harvesting where every microamp counts. The programmable output current can limit the load to match the available energy.
推薦
推薦產品摘要
工程參考資料，適用於 LTC3114IDE#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 | LTC3114IFE-1#PBF | LTC3114EDHC-1#PBF | TPS63070RNMT |
|---|---|---|---|---|
| Package | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | 16-WFDFN Exposed Pad | VQFN-15 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2V to 16V |
| Output Current | 1A | 1A | 1A | 3.6A |
| Switching Frequency | 1.2MHz | 1.2MHz | 1.2MHz | 2.4MHz |
| Efficiency | Up to 96% | Up to 96% | Up to 96% | Up to 95% |
| Quiescent Current | 30µA (Burst Mode) | 30µA (Burst Mode) | 30µA (Burst Mode) | 50µA (PFM) |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
主要差異化特點
- Wide input voltage range of 2.2V to 40V (對比TPS63070RNMT)
- Programmable average output current (對比LTC3114IFE-1#PBF)
- Low 30µA quiescent current in Burst Mode (對比TPS63070RNMT)
設計說明
For optimal performance, place the input and output capacitors as close as possible to the IC pins. Use a 10µF ceramic capacitor for input and output, and a 0.1µF capacitor for high-frequency decoupling. The exposed pad should be connected to a large ground plane to improve thermal dissipation.
The LTC3114IDE#PBF can dissipate significant power at high input-output differentials. Ensure adequate copper area on the PCB for heat sinking. The 16-TSSOP exposed pad package has a thermal resistance of approximately 40°C/W; calculate junction temperature to avoid exceeding the 125°C maximum.
Do not exceed the absolute maximum input voltage of 40V. Use a proper input capacitor with low ESR to handle ripple current. The programmable output current (ITHR pin) should be set according to the load requirements; leaving it unconnected may result in higher current limit than intended.
合規資訊
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
