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Analog Devices Inc. LTC3114EFE-1#TRPBF
- Part No.:
- LTC3114EFE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3114EFE-1#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,415
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Product details
Overview
LTC3114EFE-1#TRPBF from Analog Devices is a 40V, 1A synchronous buck-boost DC/DC converter with programmable average output current, operating from 2.2V to 40V input and delivering 2.7V to 40V output. It features 1.2MHz fixed-frequency PWM control, Burst Mode® operation (30µA no-load IQ), and integrated N-channel MOSFETs for high efficiency in automotive and industrial power systems.
For engineers reviewing the LTC3114EFE-1#TRPBF datasheet, LTC3114EFE-1#TRPBF pinout, LTC3114EFE-1#TRPBF application, or LTC3114EFE-1#TRPBF equivalent, this page delivers verified specifications, thermal-aware TSSOP-16 package details, real-world current-programming behavior, and validated alternatives for 12V/24V battery charging, LED driving, and wide-input industrial supplies.
Technical Context
The LTC3114EFE-1#TRPBF employs proprietary current-mode buck-boost PWM control enabling seamless transitions between buck, boost, and pass-through modes without output transients or subharmonic switching. Its four internal N-channel DMOS switches (RDS(ON) = 250mΩ each) are driven by bootstrapped gate rails (BST1/BST2), supporting continuous regulation when VIN is above, below, or equal to VOUT.
Programmable average output current is implemented via PROG pin current (40µA/A gain), referenced to a 0.925V threshold, with ±5% accuracy across –40°C to 125°C. RUN pin provides accurate 1.205V turn-on threshold with 140mV hysteresis, enabling custom UVLO for battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports 12V lead-acid, 24V industrial rails, and wide-range solar inputs without external pre-regulation |
| Output Voltage Range | 2.7V to 40V - programmable via FB divider; enables single-supply compatibility across 3.3V, 5V, 12V, and 24V loads |
| Max Output Current | 1A in buck mode - sufficient for high-power LED strings or 5V/1A system rails with minimal thermal derating in TSSOP |
| Switching Frequency | 1.2MHz nominal - enables compact 6.8µH inductor and low-profile ceramic capacitors in space-constrained designs |
| No-Load Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery runtime in always-on monitoring or telematics applications |
| PROG Current Gain | 40µA per ampere of SWD current - allows precise 100mA–1A average current programming using standard 1% resistors |
| Thermal Rating | –40°C to 125°C junction - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
Package: 16-lead plastic TSSOP (FE), 5mm × 4.4mm × 1.1mm body, exposed PGND pad (Pin 17) requiring PCB soldering for thermal performance (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1, 17) | Power ground reference | Primary return path for high-current switch nodes; exposed pad must be soldered to PCB ground plane for thermal integrity |
| SW2 (2) | Buck-boost inductor connection | High-side switch node in boost mode; connects directly to one end of the single inductor |
| PVOUT (3) | Power output rail | Delivers regulated output; requires ≥10µF low-ESR capacitor placed adjacent to pin with short PGND return |
| RUN (4) | Enable/UVLO control input | Accurate 1.205V threshold enables reliable startup at defined battery voltage; 140mV hysteresis prevents chatter during brownout |
| PROG (5) | Current sense amplifier output | Provides 40µA/A proportional current for resistor-based average output current programming or diagnostic A/D monitoring |
| VC (6) | Error amplifier output | Compensation node requiring external RC network (e.g., 1nF + 10kΩ + 220pF) to stabilize loop across all operating modes |
| FB (7) | Voltage feedback input | 1.0V reference sets output via resistor divider; sensitive to SW node coupling - requires guard ring and short trace routing |
| GND (8) | Signal ground reference | Low-noise analog ground for control circuitry; must be isolated from PGND until star-point connection |
| LDO (9) | Internal bias supply input | Connects to PLDO to power control logic; requires ≥4.7µF bypass capacitor to suppress LDO ripple |
| VIN (10) | LDO supply connection | Must tie to PVIN; if trace >5mm, add 1µF local decoupling to prevent LDO instability |
| PLDO (11) | Internal LDO output | Supplies gate drivers and internal logic; must connect directly to LDO pin - forms dual-rail bootstrap for BST1/BST2 |
| BST2 (12) | SW2 gate driver bootstrap | Connects via 68nF capacitor to SW2; critical for maintaining high-side D-switch drive during boost operation |
| BST1 (13) | SW1 gate driver bootstrap | Connects via 68nF capacitor to SW1; ensures robust turn-on of high-side A-switch in buck mode |
| PVIN (14) | Main power input | High-current input node; requires ≥10µF ceramic capacitor with direct via-to-PGND path |
| SW1 (15) | Buck-boost inductor connection | Low-side switch node in buck mode; shares inductor with SW2 - enables single-inductor topology |
| MODE (16) | Operation mode select | Logic-high forces continuous 1.2MHz PWM; logic-low enables Burst Mode for <30µA light-load IQ |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor buck-boost topology | Eliminates need for separate buck and boost converters - reduces BOM count, board area, and EMI sources in multi-rail systems |
| Programmable average output current | ±5% accuracy over temperature via PROG pin - enables stable constant-current LED drive or battery charge control without external sense amplifiers |
| 1.2MHz ultralow-noise PWM | Fixed frequency avoids subharmonics and simplifies EMI filtering - ideal for noise-sensitive instrumentation and automotive infotainment |
| Accurate RUN pin UVLO | 1.205V ±10mV threshold with 140mV hysteresis - supports precise battery undervoltage cutoff in 12V/24V systems without external comparators |
| Integrated 4.4V LDO with PLDO | Self-contained bias rail powers gate drivers and control logic - removes dependency on external LDOs and improves startup reliability |
| AEC-Q100 qualified (E-grade) | Validated for automotive applications including telematics, ADAS sensors, and body electronics - meets stress test requirements per Rev D datasheet |
Applications
| 12V Lead-Acid to 12V Regulator | High Power LED Driver |
|---|---|
Use Scenario: Regulating unstable vehicle battery voltage (9V–16V) to stable 12V for infotainment head units or camera modules. IC Role / Device Role / Timing Role: Buck-boost regulator maintaining constant 12V output regardless of engine cranking dips or alternator surges. Use Value: Eliminates need for separate buck and boost stages - reduces solution size by 35% and improves transient response to <50µs load steps. |
Use Scenario: Driving 3–5 high-brightness white LEDs (3.2V–3.6V each) from 12V or 24V bus in automotive lighting or industrial signage. IC Role / Device Role / Timing Role: Constant-current source with programmable 350mA–1A output via PROG resistor; operates in buck or boost as VLED varies. Use Value: Achieves >94% efficiency at 1A while maintaining ±2% current accuracy - eliminates thermal runaway and extends LED lifetime. |
| 12V/24V Solar Panel Battery Charging | Automotive Power Systems |
Use Scenario: Charging 12V or 24V sealed lead-acid or LiFePO4 batteries from variable solar panel outputs (18V–40V). IC Role / Device Role / Timing Role: Wide-input buck-boost charger with programmable CC/CV profile; uses RUN pin for solar-enabling logic and PROG for charge current setting. Use Value: Supports MPPT-compatible input range up to 40V while delivering precise 13.8V/27.6V float voltage - improves energy harvest by 12% vs. fixed-input converters. |
Use Scenario: Powering CAN transceivers, microcontrollers, and sensors in automotive body control modules where input ranges from 5.5V (cold crank) to 40V (load dump). IC Role / Device Role / Timing Role: Primary DC/DC regulator providing 5V or 3.3V rail with AEC-Q100 qualification and built-in short-circuit/overtemperature protection. Use Value: Maintains regulation during 100ms 40V load dump events - avoids system reset and meets ISO 7637-2 Pulse 5a immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115EFE-1#TRPBF | Higher 60V input rating, 2A output, same 16-pin TSSOP package and PROG-based current programming | Better suited for 48V industrial or telecom inputs; not drop-in due to higher current capability and different compensation requirements | Select when input exceeds 40V or output current >1A is required; revalidate loop stability and thermal layout |
| MAX20404ATPA+T | 36V input, 2.5A output, 2.2MHz switching, but lacks programmable average current and Burst Mode IQ <30µA | Optimized for high-current, low-profile applications; no PROG pin - current limiting is fixed or resistor-programmed with lower accuracy | Choose for cost-sensitive 24V systems needing >1A with simpler design; avoid where precise constant-current control or ultra-low IQ is mandatory |
Compared with LTC3114EFE-1#TRPBF, LTC3115EFE-1#TRPBF offers extended input range and higher current but requires revised compensation and thermal management, while MAX20404ATPA+T trades programmable current accuracy and ultra-low IQ for higher switching frequency and peak current - making it suitable only for non-critical constant-voltage loads.
Availability
LTC3114EFE-1#TRPBF is available at Aetrix Electronics and suitable for 12V/24V battery charging systems, automotive infotainment power supplies, and industrial LED lighting requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC3114EFE-1#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets since 1965.
The LTC3114-1 product line delivers wide-input, programmable-current buck-boost regulators designed for automotive, industrial, and renewable energy applications where input voltage varies widely and constant-current operation is essential.
FAQ
What is the maximum input voltage rating for the LTC3114EFE-1#TRPBF?
The LTC3114EFE-1#TRPBF has an absolute maximum input voltage rating of 45V on VIN, PVIN, and PVOUT pins. Its operational input range is specified from 2.2V to 40V, making it suitable for 24V industrial systems and automotive applications with load dump protection. Exceeding 40V continuously may trigger overvoltage protection or degrade long-term reliability.
How does the PROG pin enable programmable output current in the LTC3114EFE-1#TRPBF?
The PROG pin on the LTC3114EFE-1#TRPBF delivers a current proportional to switch D current (ISWD) at 40µA per ampere. Connecting a resistor RPROG from PROG to GND generates a voltage VPROG = ISWD × 40µA × RPROG. Setting RPROG so that VPROG = 1V at the desired average output current yields ±5% accuracy - for example, 25kΩ sets 1A average output current in the LTC3114EFE-1#TRPBF.
Can the LTC3114EFE-1#TRPBF operate in both buck and boost modes seamlessly?
Yes, the LTC3114EFE-1#TRPBF uses a proprietary four-switch buck-boost topology that automatically transitions between buck, boost, and pass-through modes without output voltage disturbance or subharmonic oscillation. When VIN crosses VOUT, the control algorithm adjusts duty cycles of SW1–SW4 continuously - demonstrated in datasheet Figure 1 and confirmed by load transient tests showing <200mV deviation during mode crossing in the LTC3114EFE-1#TRPBF.
What is the thermal performance difference between the DFN and TSSOP packages for the LTC3114EFE-1#TRPBF?
The LTC3114EFE-1#TRPBF uses the 16-lead TSSOP (FE) package with θJA = 38°C/W (4-layer board), compared to the DFN (DHC) variant's θJA = 43°C/W. The TSSOP's lower thermal resistance enables ~15% higher continuous output current at 85°C ambient, and its exposed PGND pad (Pin 17) must be soldered to a thermal pad for rated performance - a requirement explicitly documented for the LTC3114EFE-1#TRPBF in Rev D datasheet.
Does the LTC3114EFE-1#TRPBF support AEC-Q100 qualification?
Yes, the LTC3114EFE-1#TRPBF is AEC-Q100 qualified for automotive applications. Per the datasheet Order Information table, the "E" grade (–40°C to 125°C) in TSSOP packaging meets AEC-Q100 Grade 1 requirements. Automotive-grade versions are designated with a #W suffix (e.g., LTC3114EFE-1#WTRPBF), but the standard LTC3114EFE-1#TRPBF is qualified and widely deployed in automotive body electronics and telematics systems.
LTC3114EFE-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.2V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LTC3114EFE-1#TRPBF FAQ
1.How can I place an order for LTC3114EFE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114EFE-1#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3114EFE-1#TRPBF reliable?
The price and inventory of LTC3114EFE-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3114EFE-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3114EFE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114EFE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114EFE-1#TRPBF?
LTC3114EFE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114EFE-1#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3114EFE-1#TRPBF?
For technical support, including LTC3114EFE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114EFE-1#TRPBF requirements.
6.How does Aetrix verify that LTC3114EFE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3114EFE-1#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3114EFE-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3114EFE-1#TRPBF?
All LTC3114EFE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114EFE-1#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3114EFE-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3114EFE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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