LTC3112MPFE#PBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
MPN: LTC3112MPFE#PBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
Drop-in alternatives for LTC3112MPFE#PBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LTC3112HFE#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3112EFE#PBF
β Drop-Inβ In Stock
$4.3 / Unit
View Datasheet βLTC3112MPFE#TRPBF
β Drop-Inβ In Stock
$5.06 / Unit
View Datasheet βLTC3112MPFE#PBF Maximum Ratings & Electrical Characteristics
| Function | Buck-Boost |
| Output Type | Adjustable |
| Output Voltage Range | 2.5V to 14V |
| Output Current | 2.5A |
| Input Voltage Range | 2.7V to 15V |
| Switching Frequency | 750kHz |
| Number of Outputs | 1 |
| Synchronous Rectifier | Yes |
| Package | 20-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Operating Temperature Range | -55Β°C to +150Β°C (TJ) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Number of Terminals | 20 |
| Package Code | HTSSOP |
LTC3112MPFE#PBF Pin Configuration
| Pin 1 | SW1 β Switch node connection to inductor |
| Pin 2 | PVIN β Power input supply |
| Pin 3 | PVIN β Power input supply |
| Pin 4 | GND β Ground |
| Pin 5 | GND β Ground |
| Pin 6 | SW2 β Switch node connection to inductor |
| Pin 7 | SW2 β Switch node connection to inductor |
| Pin 8 | PVOUT β Power output |
| Pin 9 | PVOUT β Power output |
| Pin 10 | VOUT β Output voltage sense |
| Pin 11 | VOUT β Output voltage sense |
| Pin 12 | VFB β Feedback input |
| Pin 13 | RUN β Enable input |
| Pin 14 | SYNC β External clock sync |
| Pin 15 | MODE β Mode selection |
| Pin 16 | SS β Soft-start programming |
| Pin 17 | ITH β Error amplifier output |
| Pin 18 | VIN β Input supply |
| Pin 19 | VIN β Input supply |
| Pin 20 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LTC3112MPFE#PBF is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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 (-55Β°C to +150Β°C) suits under-hood and outdoor installations.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for LTC3112MPFE#PBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 | -55Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C |
| Pin Compatibility | Reference | Yes | Yes | No |
Key Differentiators
- Military temperature range (vs LTC3112EFE#PBF)
- Higher output current (vs TPS63070RNMT)
- Pin-compatible with other LTC3112 variants (vs TPS63070RNMT)
Design Notes
For optimal performance, place the input and output capacitors as close as possible to the PVIN and PVOUT pins. Use a 10Β΅F 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 40Β°C/W, so the junction temperature rise is about 56Β°C. Ensure adequate copper area or airflow to keep the junction below 150Β°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.
Compliance Information
RoHS compliant and lead-free per JLCPCB listing. Not AEC-Q100 qualified.
