LTC3115-2EFE#PBF - 40V, 2A Sync Buck-Boost DC/DC | Analog Devices
MPN: LTC3115-2EFE#PBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.99 | $9.99 |
| 10 | $8.95 | $89.50 |
| 100 | $7.85 | $785.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.25 | $6,250.00 |
Drop-in alternatives for LTC3115-2EFE#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:
LTC3115EFE-1#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115EFE-2#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115EFE-1#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115EFE-2#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115EFE-1#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115-2EFE#PBF Maximum Ratings & Electrical Characteristics
| Function | Buck-Boost |
| Output Voltage | 2.7V to 40V (Adjustable) |
| Output Current | 2A (Max) |
| Input Voltage Range | 2.7V to 40V |
| Switching Frequency | 400kHz to 2MHz (Programmable) |
| Synchronous Rectifier | Yes |
| Burst Mode Operation | Yes |
| Shutdown Current | 3Β΅A |
| Output Disconnect in Shutdown | Yes |
| Short-Circuit Protection | Yes |
| Internal Soft-Start | Yes |
| Package | 20-Lead TSSOP (FE16) with Exposed Pad |
| Operating Temperature Range | -40Β°C to +125Β°C |
| RoHS Compliant | Yes |
| Mounting Type | Surface Mount |
LTC3115-2EFE#PBF Pin Configuration
| Pin 1 | SW1 β Switch node connection for the buck-boost converter |
| Pin 2 | PVIN1 β Power input supply |
| Pin 3 | PVIN2 β Power input supply |
| Pin 4 | VIN β Input supply for internal circuitry |
| Pin 5 | RUN β Enable pin (active high) |
| Pin 6 | SYNC β External clock synchronization input |
| Pin 7 | MODE β Mode selection (Burst Mode or PWM) |
| Pin 8 | ITH β Error amplifier output for loop compensation |
| Pin 9 | FB β Feedback input for output voltage regulation |
| Pin 10 | VOUT β Output voltage sense |
| Pin 11 | PVOUT1 β Power output |
| Pin 12 | PVOUT2 β Power output |
| Pin 13 | SW2 β Switch node connection for the buck-boost converter |
| Pin 14 | PGND β Power ground |
| Pin 15 | PGND β Power ground |
| Pin 16 | SGND β Signal ground |
| Pin 17 | SS β Soft-start programming pin |
| Pin 18 | FREQ β Switching frequency programming pin |
| Pin 19 | VCC β Internal regulated supply output |
| Pin 20 | EXPOSED PAD β Exposed pad for thermal dissipation, connect to 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
LTC3115-2EFE#PBF is suitable for 6 applications: Automotive Power Supplies, Industrial Instrumentation, Portable Devices, Battery-Powered Systems, Telecom and Networking, Medical Devices.
Automotive Power Supplies
The LTC3115-2EFE#PBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range and ability to handle fast input voltage transients, such as load-dump conditions. It provides a regulated output voltage for various automotive systems, including infotainment, ADAS, and body control modules. Its high efficiency and robust protection features ensure reliable operation in harsh automotive environments.
Recommended
Industrial Instrumentation
In industrial instrumentation, the LTC3115-2EFE#PBF provides a stable output voltage from a varying input source, such as a 24V industrial bus. Its wide input range and programmable switching frequency allow designers to optimize efficiency and component size. The device's fast transient response ensures stable operation in systems with rapidly changing loads, making it suitable for sensors, actuators, and control systems.
Recommended
Portable Devices
The LTC3115-2EFE#PBF is well-suited for portable devices that require a regulated output voltage from a battery that can vary above and below the desired rail. Its Burst Mode operation and low shutdown current (3Β΅A) help extend battery life. The device's small 20-lead TSSOP package and high efficiency make it ideal for space-constrained applications such as handheld instruments and portable medical devices.
Recommended
Battery-Powered Systems
For battery-powered systems, the LTC3115-2EFE#PBF provides a regulated output voltage from a battery whose voltage can drop below the required level. Its wide input range and high efficiency ensure maximum battery life. The device's low shutdown current and Burst Mode operation are particularly beneficial for standby and light-load conditions, making it ideal for IoT devices, remote sensors, and wireless modules.
Recommended
Telecom and Networking
In telecom and networking equipment, the LTC3115-2EFE#PBF provides a stable output voltage from a wide input range, such as 12V or 24V backplane supplies. Its programmable switching frequency allows synchronization to external clocks to minimize noise interference. The device's high efficiency and thermal performance make it suitable for continuous operation in rack-mounted systems.
Recommended
Medical Devices
The LTC3115-2EFE#PBF is suitable for medical devices that require a reliable and regulated power supply from a battery or DC source. Its wide input range and high efficiency ensure consistent performance, while its low shutdown current helps preserve battery life in portable medical equipment. The device's robust protection features, including short-circuit protection and thermal shutdown, enhance safety in critical applications.
Recommended
Recommended Products Summary
Engineering reference data for LTC3115-2EFE#PBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3115EFE-1#PBF |
|---|---|---|
| Package | 20-Lead TSSOP (FE16) | 20-Lead TSSOP (FE16) |
| Brand | Analog Devices | Analog Devices |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V |
| Output Current | 2A | 2A |
| Switching Frequency | 400kHz to 2MHz | 400kHz to 2MHz |
| Burst Mode | Yes | Yes |
| Shutdown Current | 3Β΅A | 3Β΅A |
| Optimized for Fast Transients | Yes | No |
Key Differentiators
- Optimized for fast input voltage transients (vs LTC3115EFE-1#PBF)
- Wide input and output voltage range (vs LTC3115EFE-1#PBF)
- High efficiency with Burst Mode (vs LTC3115EFE-1#PBF)
Design Notes
For optimal thermal performance, solder the exposed pad of the 20-lead TSSOP package to a large copper area on the PCB. Use multiple vias to connect the pad to the ground plane, which helps dissipate heat and reduce thermal resistance. Ensure adequate copper pour for high current paths, especially for the input and output power connections.
Keep the switching node (SW1, SW2) traces short and wide to minimize parasitic inductance and EMI. Place the input and output capacitors as close as possible to the IC pins. Use a ground plane to provide a low-impedance return path for high-frequency currents. Separate the power ground (PGND) from the signal ground (SGND) to avoid noise coupling.
Do not exceed the absolute maximum ratings for input voltage (40V) and output voltage (40V). Ensure the inductor is rated for the peak current and saturation current. Use appropriate compensation components on the ITH pin to ensure loop stability. Verify the soft-start capacitor value to control inrush current during startup.
Compliance Information
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
