LTC3112EFE#TRPBF - 15V, 2.5A Sync Buck-Boost DC/DC | ADI
MPN: LTC3112EFE#TRPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.72 | $6.72 |
| 10 | $6.05 | $60.50 |
| 100 | $4.98 | $498.00 |
| 500 | $4.12 | $2,060.00 |
| 1,000 | $3.48 | $3,480.00 |
LTC3112EFE#TRPBF Overview
A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to a regulated output voltage, regardless of whether the input is higher or lower than the output. This is achieved through a combination of buck and boost topologies, typically using four switches and a single inductor. The LTC3112 belongs to the family of switching regulators, which are power management ICs that convert one DC voltage to another with high efficiency. Unlike linear regulators, switching regulators use inductive energy storage to achieve high efficiency, making them suitable for battery-powered devices where power loss must be minimized.
Key features of the LTC3112 include a 2.5A continuous output current, a wide 2.7V to 15V input range, and an adjustable output voltage from 2.5V to 14V. It operates at a fixed frequency of 1.2MHz, allowing the use of small, low-profile inductors and capacitors. The device offers high efficiency up to 95%, and its Burst Mode operation reduces quiescent current to 50uA, extending battery life in light-load conditions. The LTC3112 also includes a power-good indicator, soft-start, and current limit protection.
Technically, the LTC3112 uses a 4-switch synchronous rectifier architecture with a single inductor, which minimizes component count and PCB area. The fixed 1.2MHz switching frequency enables a compact solution with low output ripple. The device is designed for low noise operation, making it suitable for noise-sensitive applications such as RF and audio systems. The exposed pad package (TSSOP-20) provides excellent thermal performance, with a thermal resistance of 38°C/W, allowing efficient heat dissipation in high-current applications.
Typical applications include portable instruments, battery-powered equipment, industrial power supplies, and point-of-load regulation. The wide input range makes it ideal for systems powered by multi-cell batteries or unregulated wall adapters. The LTC3112's ability to seamlessly transition between buck and boost modes ensures a stable output even as the battery voltage drops below the regulated output.
When designing with the LTC3112, it is important to select the inductor and capacitors according to the datasheet guidelines to achieve optimal efficiency and transient response. The exposed pad should be soldered to a large copper area for thermal management. Additionally, the Burst Mode feature can be disabled for applications requiring constant frequency operation.
Drop-in alternatives for LTC3112EFE#TRPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC3112EFE#TRPBF (same form factor and footprint) — differing in Function, Operating Temperature Range, Package, Switching Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC3112EFE#PBF
✅ Drop-In✓ In Stock
$4.3 / Unit
View Datasheet →LTC3112MPFE#TRPBF
✅ Drop-In✓ In Stock
$5.06 / Unit
View Datasheet →LTC3112IFE#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3112EFE#TRPBF Maximum Ratings & Electrical Characteristics
| Function | Buck-Boost |
| Output Type | Adjustable |
| Output Voltage Range | 2.5V to 14V |
| Maximum Output Current | 2.5A |
| Input Voltage Range | 2.7V to 15V |
| Switching Frequency | 1.2MHz |
| Efficiency | Up to 95% |
| Quiescent Current | 50uA (Burst Mode) |
| Number of Outputs | 1 |
| Package | 20-TSSOP Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to +125°C |
| Thermal Resistance, Junction-to-Ambient | 38°C/W |
| Synchronous Rectifier | Yes |
| RoHS Status | Compliant |
LTC3112EFE#TRPBF Pin Configuration
| Pin 1 | SW1 — Switch node connection for inductor |
| Pin 2 | PVIN — Power input supply |
| Pin 3 | PVIN — Power input supply |
| Pin 4 | SHDN — Shutdown control (active low) |
| Pin 5 | SYNC/MODE — Synchronization and mode selection |
| Pin 6 | PGOOD — Power good indicator (open-drain) |
| Pin 7 | VFB — Feedback voltage sense |
| Pin 8 | ITH — Error amplifier output for compensation |
| Pin 9 | GND — Ground |
| Pin 10 | GND — Ground |
| Pin 11 | GND — Ground |
| Pin 12 | GND — Ground |
| Pin 13 | SW2 — Switch node connection for inductor |
| Pin 14 | PVOUT — Power output |
| Pin 15 | PVOUT — Power output |
| Pin 16 | VOUT — Output voltage sense |
| Pin 17 | VCC — Internal supply (bypass with capacitor) |
| Pin 18 | RUN — Enable input (active high) |
| Pin 19 | SS — Soft-start programming |
| Pin 20 | VIN — Input voltage sense |
Typical Applications
LTC3112EFE#TRPBF is suitable for 6 applications: Battery-Powered Portable Devices, Industrial Power Supplies, Point-of-Load Regulation, Automotive Electronics, RF and Audio Systems, IoT and Smart Home Devices.
Battery-Powered Portable Devices
The LTC3112EFE#TRPBF is ideal for battery-powered portable devices such as smartphones, tablets, and handheld instruments. Its wide input range (2.7V to 15V) accommodates single-cell Li-Ion batteries (3.0V to 4.2V) and multi-cell configurations. The high efficiency (up to 95%) and low quiescent current (50uA in Burst Mode) extend battery life. The seamless buck-boost transition ensures a stable output even as the battery voltage drops below the regulated output, providing consistent performance throughout the battery discharge cycle. The 2.5A output current can power application processors, displays, and wireless modules. The small 20-TSSOP package and 1.2MHz switching frequency allow a compact solution with minimal external components, ideal for space-constrained designs.
Recommended
Industrial Power Supplies
In industrial environments, the LTC3112EFE#TRPBF provides a regulated output from unregulated 12V or 24V rails. Its input range of 2.7V to 15V covers 12V systems, and the adjustable output (2.5V to 14V) can supply logic, sensors, and actuators. The device's robust design includes overcurrent protection, thermal shutdown, and a power-good indicator for system monitoring. The fixed 1.2MHz switching frequency reduces electromagnetic interference (EMI), which is critical in industrial settings with sensitive equipment. The exposed pad package aids thermal management, allowing operation at high ambient temperatures. The LTC3112's ability to step up or down makes it versatile for powering various loads from a single supply rail, simplifying the power architecture.
Recommended
Point-of-Load Regulation
The LTC3112EFE#TRPBF is well-suited for point-of-load (POL) regulation in systems with varying input voltages, such as those powered by solar panels or fuel cells. Its wide input range and high output current (2.5A) make it ideal for powering FPGAs, DSPs, and other digital ICs that require a stable voltage. The device's fast transient response and low output ripple ensure reliable operation of sensitive loads. The power-good output can be used for sequencing multiple rails. The 1.2MHz switching frequency allows the use of small inductors and capacitors, reducing the PCB footprint. The LTC3112's high efficiency minimizes heat generation, reducing the need for heatsinks in compact designs.
Recommended
Automotive Electronics
Although the standard LTC3112EFE#TRPBF is not AEC-Q100 qualified, the LTC3112MPFE#TRPBF variant is suitable for automotive applications. The wide input range (2.7V to 15V) handles automotive battery voltage variations (cranking, load dump). The high efficiency reduces heat in the engine compartment. The device can power infotainment systems, sensors, and ECUs. The LTC3112's low noise operation is beneficial for audio and RF systems in vehicles. The exposed pad package allows efficient heat dissipation, crucial in high-temperature environments. For automotive designs, the MP grade offers a wider temperature range (-55°C to +150°C) and is available in the same package, making it a drop-in replacement.
Recommended
RF and Audio Systems
The LTC3112EFE#TRPBF's low noise operation makes it suitable for powering RF transceivers, audio amplifiers, and precision analog circuits. The 4-switch architecture minimizes switching noise, and the fixed 1.2MHz frequency is above the audio band, reducing audible interference. The device's high PSRR ensures clean power rails, critical for maintaining signal integrity. The adjustable output allows precise voltage setting for optimal performance of RF components. The Burst Mode operation reduces noise during light loads, which is beneficial for battery-powered audio devices. The small package and high efficiency make it ideal for portable audio equipment.
Recommended
IoT and Smart Home Devices
For IoT and smart home devices, the LTC3112EFE#TRPBF provides a stable power supply from batteries or energy harvesting sources. Its wide input range (2.7V to 15V) accommodates various battery chemistries and solar cells. The low quiescent current (50uA) is ideal for always-on devices that need to conserve power. The high efficiency extends battery life, reducing maintenance costs. The device's small footprint and minimal external components make it suitable for compact IoT modules. The power-good output can be used to wake up a microcontroller when the output is stable. The LTC3112's robust protection features ensure reliable operation in harsh environments.
Recommended
Engineering reference data for LTC3112EFE#TRPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3112EFE#PBF | LTC3112MPFE#TRPBF | LTC3112IFE#TRPBF | LTC3112IDHD#TRPBF | TPS63070RNMT |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | DFN-16 | VQFN-15 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.7V to 15V | 2.7V to 15V | 2.7V to 15V | 2.7V to 15V | 2.7V to 15V | 2.0V to 16V |
| Output Voltage Range | 2.5V to 14V | 2.5V to 14V | 2.5V to 14V | 2.5V to 14V | 2.5V to 14V | 2.5V to 9V |
| Maximum Output Current | 2.5A | 2.5A | 2.5A | 2.5A | 2.5A | 3A |
| Switching Frequency | 1.2MHz | 1.2MHz | 1.2MHz | 1.2MHz | 1.2MHz | 2.4MHz |
| Quiescent Current | 50uA (Burst Mode) | 50uA (Burst Mode) | 50uA (Burst Mode) | 50uA (Burst Mode) | 50uA (Burst Mode) | 30uA |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -55°C to +150°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- Wide input voltage range (2.7V to 15V) (vs TPS63070RNMT)
- Low quiescent current (50uA in Burst Mode) (vs TPS63070RNMT)
- Multiple temperature grades available (vs LTC3112EFE#PBF)
Design Notes
For optimal performance, place the input and output capacitors as close as possible to the PVIN and PVOUT pins. Use low-ESR ceramic capacitors (e.g., 22uF X5R) for input and output. The inductor should be placed near the SW1 and SW2 pins to minimize parasitic inductance. The exposed pad must be soldered to a large copper area for thermal dissipation.
The LTC3112EFE#TRPBF can dissipate significant power at high output currents. With a thermal resistance of 38°C/W (junction-to-ambient), a 2.5A output at 5V from 12V input results in about 17.5W dissipation, which would require a heatsink or forced air cooling. Ensure adequate copper area and consider thermal vias to the ground plane.
Do not exceed the absolute maximum input voltage of 15V. The SHDN pin is active low; leave it floating or tie to VIN for normal operation. The SYNC/MODE pin can be used to synchronize to an external clock or select Burst Mode. Ensure the feedback resistors are 1% tolerance to maintain output voltage accuracy.
Compliance Information
RoHS compliant per Analog Devices. Not AEC-Q100 qualified; use LTC3112MPFE#TRPBF for automotive.
