LTC3115-1EFE#PBF - 40V, 2A Sync Buck-Boost DC/DC | Analog Devices
MPN: LTC3115-1EFE#PBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
Drop-in alternatives for LTC3115-1EFE#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#TRPBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115EFE#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115-1EFE#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 | 300kHz to 2MHz (programmable) |
| Synchronous Rectification | Yes |
| Number of Outputs | 1 |
| Package | 20-TSSOP Exposed Pad (FE16) |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Mounting Type | Surface Mount |
| Control Architecture | Current Mode |
| Low Noise Algorithm | Yes |
| Burst Mode Operation | Yes |
| Power Good Output | Yes |
| RoHS Status | Compliant |
LTC3115-1EFE#PBF Pin Configuration
| Pin 1 | SW1 β Switch node connection for inductor |
| Pin 2 | PVIN1 β Power input supply |
| Pin 3 | PVIN2 β Power input supply |
| Pin 4 | SHDN β Shutdown control (active low) |
| Pin 5 | SYNC β External clock synchronization input |
| Pin 6 | MODE β Mode selection (Burst Mode or PWM) |
| Pin 7 | PGOOD β Power good output (open-drain) |
| Pin 8 | VFB β Feedback voltage input |
| Pin 9 | ITH β Error amplifier output for compensation |
| Pin 10 | SS β Soft-start programming |
| Pin 11 | RT β Switching frequency programming |
| Pin 12 | VCC β Internal supply voltage |
| Pin 13 | GND β Ground |
| Pin 14 | GND β Ground |
| Pin 15 | SW2 β Switch node connection for inductor |
| Pin 16 | PVOUT1 β Power output supply |
| Pin 17 | PVOUT2 β Power output supply |
| Pin 18 | VOUT β Output voltage sense |
| Pin 19 | VOUT β Output voltage sense |
| Pin 20 | GND β Ground |
| Pin 21 | Exposed Pad β Thermal pad, connect to GND |
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
LTC3115-1EFE#PBF is suitable for 6 applications: Automotive Power Supplies, Industrial Power Systems, Battery-Powered Equipment, Portable Medical Devices, Telecom and Networking Equipment, Renewable Energy Systems.
Automotive Power Supplies
The LTC3115-1EFE#PBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range, which accommodates load dumps and cold-crank conditions. It provides a regulated output for sensors, microcontrollers, and infotainment systems. Its high efficiency reduces heat dissipation in the vehicle's confined spaces. The device's low noise operation is critical for sensitive automotive electronics, ensuring reliable performance. With a 2A output capability, it can power multiple loads, and its programmable frequency allows synchronization to avoid interference with other vehicle systems.
Recommended
Industrial Power Systems
In industrial settings, the LTC3115-1EFE#PBF handles wide input voltage variations from 24V buses and provides a stable output for control electronics. Its 2A output current can drive actuators and sensors, while the wide temperature range (-40Β°C to +125Β°C) ensures operation in harsh environments. The device's high efficiency reduces energy costs and thermal management requirements. The power good output enables system monitoring and sequencing, and the programmable frequency allows optimization for EMI compliance. Its robust design makes it suitable for factory automation and process control.
Recommended
Battery-Powered Equipment
The LTC3115-1EFE#PBF is perfect for battery-powered equipment because it can step up or step down the battery voltage to maintain a regulated output as the battery discharges. Its Burst Mode operation reduces quiescent current, extending battery life. The wide input range (2.7V to 40V) supports various battery chemistries, including Li-Ion and lead-acid. The 2A output can power motors, displays, and wireless modules. The low noise output is essential for RF and audio circuits, and the small TSSOP package saves board space in portable devices.
Recommended
Portable Medical Devices
The LTC3115-1EFE#PBF is suitable for portable medical devices that require a stable power supply from batteries. Its low noise output is critical for sensitive analog front-ends in patient monitoring equipment. The wide input range accommodates battery voltage variations, and the high efficiency extends battery life. The device's small footprint is ideal for compact designs. The power good output can be used for system status indication. The operating temperature range covers clinical environments, and the device's reliability meets medical standards.
Recommended
Telecom and Networking Equipment
In telecom and networking equipment, the LTC3115-1EFE#PBF provides a regulated supply from a wide input range, such as 12V or 24V buses. Its 2A output can power line cards, processors, and communication modules. The low noise operation is essential for maintaining signal integrity in high-speed data transmission. The device's high efficiency reduces heat in densely packed racks. The programmable frequency allows synchronization to system clocks, minimizing EMI. The power good output enables fault monitoring, and the wide temperature range ensures reliable operation in central offices.
Recommended
Renewable Energy Systems
The LTC3115-1EFE#PBF is used in renewable energy systems, such as solar-powered devices, where input voltage varies with sunlight intensity. Its buck-boost capability ensures a stable output even when the solar panel voltage drops below the required level. The wide input range (2.7V to 40V) accommodates different panel configurations. The high efficiency maximizes energy harvest, and the low quiescent current in Burst Mode is beneficial for energy storage systems. The device's robust design handles the variable conditions of outdoor environments.
Recommended
Engineering reference data for LTC3115-1EFE#PBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3115EFE-1#TRPBF | LTC3115EDHD-1#PBF | LTC3115EFE#PBF | LTC3115EDHD#PBF | TPS63070RNMT |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP Exposed Pad | 20-TSSOP Exposed Pad | 16-DFN Exposed Pad | 20-TSSOP Exposed Pad | 16-DFN Exposed Pad | VQFN-15 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2V to 18V |
| Output Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 1.2V to 15V |
| Output Current | 2A | 2A | 2A | 2A | 2A | 3A |
| Switching Frequency | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 2.4MHz |
| Synchronous Rectification | Yes | Yes | Yes | Yes | Yes | Yes |
| Power Good Output | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide input voltage range up to 40V (vs TPS63070RNMT)
- Proprietary low noise switching algorithm (vs TPS63070RNMT)
- Programmable switching frequency up to 2MHz (vs TPS63070RNMT)
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 with adequate voltage rating. The inductor should be placed near the SW pins to minimize parasitic inductance. Ensure a solid ground plane under the device and connect the exposed pad to the ground plane with multiple vias for thermal relief.
The LTC3115-1EFE#PBF can dissipate significant power at high output currents. The exposed pad must be soldered to a large copper area on the PCB to act as a heat sink. For 2A output, ensure the PCB copper area is sufficient to keep the junction temperature below 125Β°C. Refer to the datasheet thermal impedance values for guidance.
Do not exceed the absolute maximum input voltage of 40V. Ensure the feedback resistor divider is connected correctly to set the desired output voltage. The SYNC pin should be tied to ground or a clock source; leaving it floating may cause erratic operation. Use the soft-start pin to limit inrush current during startup.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, verify with manufacturer.
