LTC3112MPFE#PBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
MPN: LTC3112MPFE#PBF ✓ פעילLTC3112MPFE#PBF סקירה
A buck-boost converter is a type of DC-DC converter that can produce an output voltage either higher or lower than the input voltage. It is essential in battery-powered systems where the battery voltage can drop below or rise above the required rail. The LTC3112 uses a unique 4-switch, single inductor architecture that provides low noise and seamless transitions between buck, boost, and buck-boost modes, ensuring a stable output regardless of input variations.
Key features include a switching frequency of 750kHz, which allows for small external components, and a high efficiency synchronous design that eliminates the need for an external Schottky diode. The device also includes a built-in soft-start, overcurrent protection, and thermal shutdown. The exposed pad on the TSSOP package aids in thermal dissipation, making it suitable for high-current applications.
The LTC3112MPFE#PBF is designed for a wide range of applications, including 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. Its wide input range and high output current make it a versatile choice for portable and industrial equipment.
When designing with this converter, pay attention to the inductor selection and PCB layout to minimize noise and ensure stability. The exposed pad should be soldered to a large copper area for effective heat sinking. The LTC3112MPFE#PBF is RoHS compliant and lead-free, making it suitable for environmentally conscious designs.
חלופות תחליף ישיר עבור LTC3112MPFE#PBF — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם LTC3112MPFE#PBF (אותו גורם צורה וטביעת רגל) — שונים ב Operating Temperature Range, Function, Switching Frequency.
LTC3112HFE#PBF
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LTC3112EFE#PBF
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC3112MPFE#TRPBF
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC3112MPFE#PBF דירוגים מרביים ומאפיינים חשמליים
| פונקציה | Buck-Boost |
| סוג פלט | Adjustable |
| טווח מתח פלט | 2.5V to 14V |
| Output Current | 2.5A |
| טווח מתח כניסה | 2.7V to 15V |
| תדר מיתוג | 750kHz |
| מספר יציאות | 1 |
| מיישר סינכרוני | Yes |
| מארז | 20-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| טווח טמפרטורת פעולה | -55°C to +150°C (TJ) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
| Lead-Free | Yes |
| Number of Terminals | 20 |
| Package Code | HTSSOP |
תצורת פינים של LTC3112MPFE#PBF
| פין 1 | SW1 — Switch node connection to inductor |
| פין 2 | PVIN — Power input supply |
| פין 3 | PVIN — Power input supply |
| פין 4 | GND — Ground |
| פין 5 | GND — Ground |
| פין 6 | SW2 — Switch node connection to inductor |
| פין 7 | SW2 — Switch node connection to inductor |
| פין 8 | PVOUT — Power output |
| פין 9 | PVOUT — Power output |
| פין 10 | VOUT — Output voltage sense |
| פין 11 | VOUT — Output voltage sense |
| פין 12 | VFB — Feedback input |
| פין 13 | RUN — Enable input |
| פין 14 | SYNC — External clock sync |
| פין 15 | MODE — Mode selection |
| פין 16 | SS — Soft-start programming |
| פין 17 | ITH — Error amplifier output |
| פין 18 | VIN — Input supply |
| פין 19 | VIN — Input supply |
| פין 20 | GND — Ground |
יישומים טיפוסיים
LTC3112MPFE#PBF מתאים עבור 6 יישוםs: Battery-Powered Handheld Devices, RF Transmitters, LED Lighting with Current Regulation, 12V Lead-Acid Battery to 12V Conversion, Backup Capacitor Stack, Multiple Power Input Systems.
Battery-Powered Handheld Devices
The LTC3112MPFE#PBF is ideal for handheld devices powered by 1-3 Li-Ion cells, providing a regulated 3.3V or 5V rail. Its wide input range (2.7V to 15V) ensures stable operation as the battery voltage drops, and the 2.5A output can power processors, displays, and wireless modules. The high switching frequency allows small external components, saving board space in compact designs.
מומלץ
RF Transmitters
RF transmitters require clean, stable power rails to avoid noise coupling into the signal. The LTC3112MPFE#PBF's low-noise 4-switch architecture and 750kHz switching frequency minimize interference. It can deliver 2.5A to support high-power amplifiers, and its wide input range allows operation from various battery configurations. The exposed pad aids thermal management during continuous transmission.
מומלץ
LED Lighting with Current Regulation
The LTC3112MPFE#PBF can be configured as a constant-current source for LED lighting, maintaining a stable current as the input voltage varies. Its buck-boost capability ensures the LED string voltage can be above or below the input, and the 2.5A output can drive multiple high-power LEDs. The high switching frequency reduces inductor size, enabling slim lighting fixtures.
מומלץ
12V Lead-Acid Battery to 12V Conversion
In automotive and industrial systems, a 12V lead-acid battery can vary from 9V to 15V. The LTC3112MPFE#PBF regulates this to a stable 12V output, ensuring consistent performance for sensitive electronics. Its 2.5A output can power sensors, controllers, and communication modules. The wide temperature range (-55°C to +150°C) suits under-hood and outdoor installations.
מומלץ
Backup Capacitor Stack
For systems requiring ride-through during power interruptions, the LTC3112MPFE#PBF can boost a capacitor stack voltage to a regulated rail. Its buck-boost topology allows the capacitor voltage to discharge below the output while maintaining regulation. The 2.5A output supports critical loads like data loggers and alarm systems, and the low quiescent current extends backup duration.
מומלץ
Multiple Power Input Systems
Systems that can be powered from USB, battery, or an external adapter benefit from the LTC3112MPFE#PBF's wide input range. It seamlessly handles input voltages from 2.7V to 15V, providing a stable output regardless of the source. This simplifies power path management and reduces component count, making it ideal for portable instruments and IoT gateways.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור LTC3112MPFE#PBF — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | LTC3112HFE#PBF | LTC3112EFE#PBF | TPS63070RNMT |
|---|---|---|---|---|
| Package | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | VQFN-15 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.7V to 15V | 2.7V to 15V | 2.7V to 15V | 2V to 16V |
| Output Voltage Range | 2.5V to 14V | 2.5V to 14V | 2.5V to 14V | 2.5V to 12V |
| Output Current | 2.5A | 2.5A | 2.5A | 2A |
| Switching Frequency | 750kHz | 750kHz | 750kHz | 2.4MHz |
| Operating Temperature Range | -55°C to +150°C | -40°C to +150°C | -40°C to +125°C | -40°C to +125°C |
| Pin Compatibility | Reference | Yes | Yes | No |
מבדילים עיקריים
- Military temperature range (לעומתLTC3112EFE#PBF)
- Higher output current (לעומתTPS63070RNMT)
- Pin-compatible with other LTC3112 variants (לעומתTPS63070RNMT)
הערות תכנון
For optimal performance, place the input and output capacitors as close as possible to the PVIN and PVOUT pins. Use a 10µF ceramic capacitor for input and output. The inductor should be placed near the SW pins to minimize parasitic inductance. The exposed pad must be soldered to a large copper area for thermal dissipation.
The LTC3112MPFE#PBF can dissipate significant power at high output currents. With a typical efficiency of 90%, at 2.5A output and 5V, power loss is about 1.4W. The thermal resistance of the TSSOP-20 package is approximately 40°C/W, so the junction temperature rise is about 56°C. Ensure adequate copper area or airflow to keep the junction below 150°C.
Do not exceed the absolute maximum input voltage of 16V. Ensure the inductor saturation current is higher than the peak switch current. The RUN pin must be pulled high to enable the device; floating it may cause unpredictable behavior. Use a proper soft-start capacitor to limit inrush current during startup.
מידע על תאימות
RoHS compliant and lead-free per JLCPCB listing. Not AEC-Q100 qualified.
