LTC3114IDE#TRPBF - 40V, 1A Buck-Boost DC/DC | Analog Devices
MPN: LTC3114IDE#TRPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.76 | $7.76 |
| 10 | $7.1 | $71.00 |
| 100 | $6.2 | $620.00 |
| 500 | $5.5 | $2,750.00 |
| 1,000 | $4.9 | $4,900.00 |
LTC3114IDE#TRPBF Overview
A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to produce a regulated output voltage, regardless of whether the input is higher or lower than the output. This is achieved through a combination of buck (step-down) and boost (step-up) topologies, typically using an inductor, switches, and control circuitry. The LTC3114-1 belongs to the family of switching regulators, which are essential in power management systems for efficiently converting and regulating voltage levels in portable, industrial, and automotive electronics.
Key features of the LTC3114IDE#TRPBF include a wide 2.7V to 40V input voltage range, an adjustable output voltage from 2.2V to 40V, and a programmable average output current limit. The proprietary buck-boost PWM control circuitry delivers low noise operation across the entire operating range, ensuring stable and clean power delivery. The device also features a low quiescent current, making it suitable for battery-powered applications where efficiency is critical.
Technically, the LTC3114-1 uses a synchronous rectification architecture with internal power switches, eliminating the need for external diodes and improving efficiency. The programmable output current feature allows designers to set the maximum output current via an external resistor, providing flexibility for various load requirements. The device also includes soft-start, overcurrent protection, and thermal shutdown to ensure reliable operation under fault conditions.
Typical applications include battery-powered systems, industrial sensors, portable instruments, and power supply designs where the input voltage can vary above or below the output. The wide input range and high efficiency make it an excellent choice for energy harvesting and automotive applications.
When designing with this device, it is important to select the appropriate inductor and output capacitors based on the desired output ripple and transient response. The exposed pad should be soldered to a large copper area for optimal thermal dissipation.
Drop-in alternatives for LTC3114IDE#TRPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC3114IFE-1#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3114HFE-1#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3114MPFE-1#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3114IDE#TRPBF Maximum Ratings & Electrical Characteristics
| Function | Buck-Boost |
| Output Type | Adjustable |
| Output Voltage Range | 2.2V to 40V |
| Output Current | 1A |
| Input Voltage Range | 2.7V to 40V |
| Number of Outputs | 1 |
| Synchronous Rectifier | Yes |
| Package | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| RoHS Status | Compliant |
| Control Architecture | Proprietary Buck-Boost PWM |
LTC3114IDE#TRPBF Pin Configuration
| Pin 1 | SW — Switch node connection to inductor |
| Pin 2 | PVIN — Power input supply |
| Pin 3 | VIN — Input supply for control circuitry |
| Pin 4 | RUN — Enable pin (active high) |
| Pin 5 | ITHR — Current limit threshold setting |
| Pin 6 | VOUT — Output voltage sense |
| Pin 7 | FB — Feedback pin for output voltage regulation |
| Pin 8 | VC — Compensation pin |
| Pin 9 | GND — Ground |
| Pin 10 | PGND — Power ground |
| Pin 11 | SW — Switch node connection to inductor |
| Pin 12 | BST — Bootstrap pin for high-side driver |
| Pin 13 | PVOUT — Power output |
| Pin 14 | VOUT — Output voltage sense |
| Pin 15 | SS — Soft-start pin |
| Pin 16 | MODE — Mode selection pin |
| Pin 17 | Exposed Pad — Thermal pad, connect to ground |
Typical Applications
LTC3114IDE#TRPBF is suitable for 6 applications: Battery-Powered Devices, Industrial Sensors, Portable Instruments, Energy Harvesting, Automotive Electronics, Power Supply Design.
Battery-Powered Devices
The LTC3114IDE#TRPBF is ideal for battery-powered devices due to its wide input voltage range (2.7V to 40V) and ability to maintain a regulated output as the battery discharges. Its high efficiency extends battery life, and the programmable output current limit protects the battery from overcurrent conditions. The device can step up or down the battery voltage to provide a stable supply rail for microcontrollers, sensors, and wireless modules, ensuring reliable operation across the battery's discharge curve.
Recommended
Industrial Sensors
In industrial environments, input voltages can vary widely due to long cable runs and noisy power lines. The LTC3114IDE#TRPBF's 2.7V to 40V input range and adjustable output make it suitable for powering sensors and transmitters from 24V industrial buses. Its low noise operation ensures accurate sensor readings, and the programmable current limit provides protection against faults. The device's wide temperature range (-40C to +125C) allows operation in harsh industrial settings.
Recommended
Portable Instruments
Portable instruments often require multiple supply rails from a single battery. The LTC3114IDE#TRPBF can generate a regulated output from a battery that may be above or below the desired voltage, simplifying the power architecture. Its small TSSOP package and high efficiency make it suitable for space-constrained designs. The programmable output current limit allows designers to match the supply to the load requirements, optimizing power consumption.
Recommended
Energy Harvesting
Energy harvesting sources like solar panels and thermoelectric generators produce variable voltages that can be above or below the required output. The LTC3114IDE#TRPBF's buck-boost topology is ideal for such applications, as it can efficiently convert the harvested energy to a stable output. Its wide input range and low quiescent current help maximize energy extraction, and the programmable current limit prevents overloading the source.
Recommended
Automotive Electronics
Automotive systems experience wide input voltage variations due to cranking, load dumps, and alternator ripple. The LTC3114IDE#TRPBF's 2.7V to 40V input range covers these conditions, providing a regulated output for ECUs, sensors, and infotainment systems. Its industrial temperature range and robust protection features make it suitable for under-hood applications. The device's low noise operation is critical for sensitive automotive electronics.
Recommended
Power Supply Design
The LTC3114IDE#TRPBF is a versatile building block for custom power supply designs. Its adjustable output and programmable current limit allow designers to create a wide range of supply voltages from a single part. The device's synchronous rectification and proprietary PWM control ensure high efficiency and low noise, making it suitable for sensitive analog and RF circuits. The TSSOP package is easy to layout and solder, facilitating rapid prototyping.
Recommended
Recommended Products Summary
Engineering reference data for LTC3114IDE#TRPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3114IFE-1#TRPBF | LTC3114HFE-1#TRPBF | LTC3114MPFE-1#TRPBF | LTC3114IDHC-1#WTRPBF | TPS63070RNMT |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | 16-WFDFN 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 16V |
| Output Voltage Range | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.5V to 9V |
| Output Current | 1A | 1A | 1A | 1A | 1A | 2A |
| Operating Temperature Range | -40C to +125C | -40C to +125C | -40C to +150C | -55C to +150C | -40C to +125C | -40C to +125C |
| Synchronous Rectification | Yes | Yes | Yes | Yes | Yes | Yes |
| Programmable Output Current | Yes | Yes | Yes | Yes | Yes | No |
Key Differentiators
- Wide input voltage range (2.7V to 40V) (vs TPS63070RNMT)
- Programmable output current limit (vs TPS63070RNMT)
- Multiple temperature grade options (vs LTC3114IFE-1#TRPBF)
Design Notes
For optimal thermal performance, solder the exposed pad of the TSSOP-16 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 thickness for high current paths.
Keep the inductor and input/output capacitors close to the IC to minimize parasitic inductance and resistance. Use short, wide traces for high-current paths (SW, PVIN, PVOUT) and place the feedback resistor divider near the FB pin to avoid noise pickup. Refer to the LTC3114-1 datasheet layout guidelines for best practices.
Do not exceed the absolute maximum ratings for input voltage (40V) and output voltage (40V). Ensure the inductor saturation current rating is higher than the peak switch current to avoid saturation. Also, verify the programmable current limit resistor value to prevent overcurrent conditions that could damage the device.
Compliance Information
RoHS compliance confirmed by distributor listings. Other compliance data not specified in provided sources.
