LTC3114IDE#PBF - 40V, 1A Buck-Boost DC/DC | Analog Devices
MPN: LTC3114IDE#PBF ✓ نشطLTC3114IDE#PBF نظرة عامة
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.
بدائل مباشرة لـ LTC3114IDE#PBF — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
LTC3114IFE-1#PBF
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LTC3113IDE#PBF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LTC3115IDE#PBF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LTC3114IDE#PBF الحدود القصوى والخصائص الكهربائية
| الوظيفة | Buck-Boost |
| Output Current | 1 A |
| نطاق جهد الدخل | 2.2 V to 40 V |
| نطاق جهد الخرج | 2.7 V to 40 V (adjustable) |
| تردد التبديل | 1.2 MHz |
| الكفاءة | Up to 96% |
| تيار السكون | 30 µA (Burst Mode, no load) |
| Control Architecture | Current-mode |
| العلبة | 16-TSSOP Exposed Pad (FE) |
| نطاق درجة حرارة التشغيل | -40°C to +125°C |
| التقويم المتزامن | Yes |
| Programmable Output Current | Yes |
| بدء التشغيل الناعم | Yes |
| الحماية من فرط التيار | Yes |
| الإيقاف الحراري | Yes |
| حالة RoHS | Compliant |
تكوين أطراف LTC3114IDE#PBF
| دبوس 1 | SW — Switch node connection to inductor |
| دبوس 2 | PVIN — Power input supply |
| دبوس 3 | VIN — Input supply sense |
| دبوس 4 | RUN — Enable input (active high) |
| دبوس 5 | ITHR — Current threshold adjust |
| دبوس 6 | VOUT — Output voltage sense |
| دبوس 7 | PVOUT — Power output |
| دبوس 8 | GND — Ground |
| دبوس 9 | GND — Ground |
| دبوس 10 | FB — Feedback input |
| دبوس 11 | VC — Compensation node |
| دبوس 12 | SS — Soft-start timing |
| دبوس 13 | MODE — Mode select (PWM/Burst) |
| دبوس 14 | SYNC — External clock sync |
| دبوس 15 | PGND — Power ground |
| دبوس 16 | SW — Switch node connection to inductor |
| دبوس 17 | Exposed Pad — Thermal pad, connect to ground |
التطبيقات النموذجية
LTC3114IDE#PBF مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LTC3114IDE#PBF — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Wide input voltage range of 2.2V to 40V (مقابلTPS63070RNMT)
- Programmable average output current (مقابلLTC3114IFE-1#PBF)
- Low 30µA quiescent current in Burst Mode (مقابلTPS63070RNMT)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
