LTC3115-2IDE#TRPBF - 40V, 2A Sync Buck-Boost | Analog Devices
MPN: LTC3115-2IDE#TRPBF 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 LTC3115-2IDE#TRPBF 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:
LTC3115IDHD-2#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115EDHD-1#TRPBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115IDHD-1#PBF
β Drop-Inπ Reference alternative (not in catalog)
LTC3115-2IDE#TRPBF Maximum Ratings & Electrical Characteristics
| Function | Buck-Boost |
| Output Type | Adjustable |
| Output Voltage Range | 2.7V to 40V |
| Input Voltage Range | 2.7V to 40V |
| Maximum Output Current | 2A |
| Switching Frequency | 300kHz to 2MHz |
| Synchronous Rectifier | Yes |
| Package | 16-WFDFN Exposed Pad |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 2.7V |
| Voltage - Output (Max) | 40V |
| Current - Output | 2A |
| Frequency - Switching | 300kHz ~ 2MHz |
| Synchronous Rectifier | Yes |
| RoHS Status | Compliant |
LTC3115-2IDE#TRPBF Pin Configuration
| Pin 1 | SW1 β Switch node connection for the buck-boost 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 for the buck-boost inductor |
| Pin 7 | PVOUT β Power output |
| Pin 8 | PVOUT β Power output |
| Pin 9 | VOUT β Output voltage sense |
| Pin 10 | VFB β Feedback input for output voltage regulation |
| Pin 11 | ITH β Error amplifier output for compensation |
| Pin 12 | FREQ β Switching frequency programming |
| Pin 13 | SYNC β External clock synchronization input |
| Pin 14 | RUN β Enable input |
| Pin 15 | PGOOD β Power good output |
| Pin 16 | VIN β Input supply for internal circuitry |
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
LTC3115-2IDE#TRPBF is suitable for 6 applications: Automotive Power Supplies, Industrial Power Supplies, Battery-Powered Equipment, Point-of-Load Regulation, Telecom and Networking Equipment, Medical Devices.
Automotive Power Supplies
The LTC3115-2IDE#TRPBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range and ability to handle fast input transients. It maintains output regulation during cranking and load dump conditions, making it suitable for infotainment systems, ADAS, and body control modules. The synchronous buck-boost topology ensures high efficiency across the entire battery voltage range, reducing heat dissipation in the vehicle's confined spaces.
Recommended
Industrial Power Supplies
In industrial environments, input voltages can vary widely due to long cable runs and noisy machinery. The LTC3115-2IDE#TRPBF's 2.7V to 40V input range and fast transient response ensure stable output for sensors, actuators, and PLCs. Its programmable switching frequency allows optimization for EMI and efficiency, and the power good output simplifies sequencing in multi-rail systems. The device's robust design handles industrial temperature ranges and transient conditions.
Recommended
Battery-Powered Equipment
For battery-powered devices, the LTC3115-2IDE#TRPBF efficiently regulates output as the battery voltage declines. Its buck-boost capability allows the full battery voltage range to be utilized, extending runtime. The low quiescent current and high efficiency at light loads are beneficial for portable instruments and wireless sensors. The small 16-WFDFN package saves board space, and the SYNC pin helps avoid interference in sensitive analog circuits.
Recommended
Point-of-Load Regulation
The LTC3115-2IDE#TRPBF can be used as a point-of-load regulator in systems with a wide input voltage range, such as those powered by 12V or 24V buses. It provides a regulated output for FPGAs, microcontrollers, and analog circuits. Its fast transient response ensures minimal voltage deviation during load steps, and the programmable frequency allows synchronization to avoid beat frequencies. The device's integrated switches reduce external component count.
Recommended
Telecom and Networking Equipment
In telecom and networking equipment, input voltages can range from 12V to 48V. The LTC3115-2IDE#TRPBF's wide input range and high efficiency make it suitable for powering line cards, switches, and routers. Its ability to handle fast transients ensures reliable operation during hot-swap events. The SYNC pin allows multiple converters to operate at the same frequency, reducing EMI and simplifying filtering.
Recommended
Medical Devices
Medical devices often require reliable power from batteries or adapters with varying voltages. The LTC3115-2IDE#TRPBF provides a stable output for sensitive electronics, and its low noise operation is beneficial for diagnostic equipment. The wide input range accommodates different power sources, and the small package is suitable for portable devices. The device's robust design meets the reliability requirements of medical applications.
Recommended
Recommended Products Summary
Engineering reference data for LTC3115-2IDE#TRPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3115IDHD-2#PBF | LTC3115IFE-2#TRPBF | LTC3115EDHD-1#TRPBF |
|---|---|---|---|---|
| Package | 16-WFDFN Exposed Pad | 16-WFDFN Exposed Pad | 20-TSSOP Exposed Pad | 16-WFDFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V |
| Output Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V |
| Maximum Output Current | 2A | 2A | 2A | 2A |
| Switching Frequency | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz | 300kHz to 2MHz |
| Optimized for Fast Transients | Yes | Yes | Yes | No |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
Key Differentiators
- Optimized for fast input transients (vs LTC3115EDHD-1#TRPBF)
- Wide input and output voltage range (vs LTC3115IFE-2#TRPBF)
- Synchronous buck-boost topology (vs LTC3115EDHD-1#TRPBF)
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 SW1 and SW2 pins to minimize parasitic inductance. Ensure a solid ground plane and use thermal vias under the exposed pad for heat dissipation.
The LTC3115-2IDE#TRPBF can dissipate significant power at high input-output differentials and 2A load. The 16-WFDFN package has a thermal resistance of approximately 40Β°C/W (theta_JA) with proper PCB layout. Ensure adequate copper area and thermal vias to keep the junction temperature below 125Β°C. For high-power applications, consider using the 20-TSSOP package variant which may have better thermal performance.
Do not exceed the absolute maximum input voltage of 40V. The SYNC pin should be tied to ground or a logic level if not used. The RUN pin must be pulled high to enable the device. Ensure the feedback resistors are placed close to the VFB pin and use 1% tolerance or better. The compensation network on ITH should be selected according to the datasheet for stable operation across the operating range.
Compliance Information
RoHS compliance indicated in product documentation. AEC-Q100 qualification not specified for this part.
