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Analog Devices Inc. LTC3114IFE-1#PBF
- Part No.:
- LTC3114IFE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3114IFE-1#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
LTC3114IFE-1#PBF from Analog Devices is a 40V, 1A synchronous buck-boost DC/DC converter with programmable average output current, 1.2MHz fixed-frequency PWM control, Burst Mode® operation (30µA no-load IQ), and integrated 4.4V LDO regulator. It regulates VOUT above, below, or equal to VIN across 2.2V–40V input and 2.7V–40V output ranges, supporting high-power LED drivers and solar battery charging systems.
For engineers reviewing the LTC3114IFE-1#PBF datasheet, LTC3114IFE-1#PBF pinout, LTC3114IFE-1#PBF application, or LTC3114IFE-1#PBF equivalent, key selection criteria include programmable output current accuracy (±5%), thermal performance in TSSOP (θJA = 38°C/W), AEC-Q100 qualification for automotive use, and seamless buck/boost mode transitions without subharmonics or output transients.
Technical Context
The LTC3114IFE-1#PBF employs average current mode control with a proprietary four-switch buck-boost topology, enabling continuous regulation across VIN-to-VOUT crossover. Its internal 1.2MHz oscillator ensures ultralow-noise switching and small external component size, while integrated N-channel DMOS switches (250mΩ RDS(ON)) minimize conduction loss.
Programmable average output current is implemented via PROG pin current sensing (40µA/A gain) and resistor-based voltage threshold (0.925V typ), independent of operating mode. The RUN pin provides accurate UVLO with 1.205V turn-on threshold and 140mV hysteresis, and the MODE pin selects between Burst Mode (30µA IQ) and fixed-frequency PWM operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.2V to 40V - supports wide-input industrial, automotive, and solar applications without pre-regulation |
| VOUT Range | 2.7V to 40V - enables single-inductor regulation above, below, or equal to VIN |
| Max Output Current | 1A in buck mode - sufficient for high-brightness LED strings or 12V/24V system rails |
| Switching Frequency | 1.2MHz ±20% - balances efficiency, EMI, and compactness using ≤10µH inductors |
| Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on systems |
| PROG Gain Accuracy | 40µA/A ±5% - enables precise constant-current programming for LED or battery charging |
| Thermal Resistance | θJA = 38°C/W (TSSOP) - requires minimal copper area for 125°C junction operation at 1A load |
| AEC-Q100 Grade | Grade I (–40°C to +125°C) - qualified for under-hood automotive power systems |
Pinout & Package
Package: 16-lead plastic TSSOP (FE), 3mm × 4.4mm footprint, exposed PGND pad (Pin 17) soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1, 17) | Power Ground Reference | Primary return path for high-current switches; exposed pad must be soldered to PCB ground plane for rated θJA = 38°C/W |
| SW2 (2) | Buck-Boost Inductor Node | Connects to one end of single inductor; carries full switching current in both buck and boost modes |
| PVOUT (3) | Output Power Rail | High-current output node requiring ≥10µF low-ESR capacitor placed adjacent to IC with short PGND return |
| RUN (4) | Enable & UVLO Control | Accurate 1.205V turn-on threshold with 140mV hysteresis; enables custom input undervoltage lockout |
| PROG (5) | Current Sense Output | Delivers 40µA per ampere of switch D current; used to program average output current with resistor to GND |
| VC (6) | Error Amplifier Output | Requires external RC compensation network (CP1, CP2, RZ) to stabilize voltage loop across all operating conditions |
| FB (7) | Feedback Input | Sets VOUT via resistive divider; nominal 1.00V reference enables precise output voltage setting (e.g., 5V = 1 + 4kΩ/1kΩ) |
| GND (8) | Signal Ground | Reference for control circuitry; must be tied to system ground with low-impedance connection separate from PGND |
| LDO (9) | Internal Regulator Input | Supplies bias for control logic; must be connected directly to PLDO and bypassed with ≥4.7µF capacitor |
| VIN (10) | LDO Supply Input | Connects to PVIN; powers internal VCC regulator; requires local 1µF bypass if trace length >5mm |
| PLDO (11) | LDO Output / Gate Driver Supply | Provides 4.4V rail for gate drivers and internal logic; must be tied to LDO pin |
| BST2 (12) | SW2 Gate Driver Boost | Connects via 68nF capacitor to SW2; generates floating supply for switch D gate driver |
| BST1 (13) | SW1 Gate Driver Boost | Connects via 68nF capacitor to SW1; generates floating supply for switch A gate driver |
| PVIN (14) | Main Power Input | High-current input node requiring ≥10µF low-ESR capacitor placed adjacent to IC with direct PGND via |
| SW1 (15) | Buck-Boost Inductor Node | Connects to other end of single inductor; complements SW2 in four-switch topology |
| MODE (16) | Operation Mode Select | Logic-high forces PWM mode (1.2MHz); logic-low enables Burst Mode for light-load efficiency |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor buck-boost topology | Eliminates need for separate buck and boost converters; reduces BOM count and board space by >30% vs dual-stage solutions |
| Programmable average output current | Enables precision constant-current LED driving or battery charging without external sense amplifiers or DACs |
| 1.2MHz ultralow-noise PWM | Confines switching energy to high-frequency band, easing EMI filtering and reducing conducted noise on sensitive analog rails |
| Integrated 4.4V LDO with PLDO | Provides clean, regulated supply for internal logic and gate drivers-no external LDO required for biasing |
| AEC-Q100 qualified (Grade I) | Validated for automotive environments including temperature cycling, vibration, and long-term reliability testing |
| Seamless buck/boost mode transition | Zero-output-transient crossover prevents voltage droop or overshoot when VIN crosses VOUT-critical for stable MCU/SOC supplies |
Applications
| Automotive Power Systems | High-Power LED Driver |
|---|---|
Use Scenario: Regulating 12V or 24V battery rail to stable 5V/12V for infotainment, ADAS sensors, or body control modules under cold-crank (4.5V) and load-dump (40V) conditions. IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering up to 1A with programmable current limit and AEC-Q100 compliance. Use Value: Maintains regulation across full automotive voltage range without external TVS or pre-regulators, reducing system cost and failure points. | Use Scenario: Driving high-brightness LED arrays in headlamps or interior lighting where constant current and thermal stability are critical. IC Role / Device Role / Timing Role: Constant-current source with PROG-based current programming and thermal foldback protection. Use Value: Delivers ±5% current accuracy over temperature and line, eliminating need for external current-sense ICs or trimming. |
| 12V/24V Solar Panel Battery Charging | 24V/28V Industrial Power Supply |
Use Scenario: Charging sealed lead-acid or LiFePO₄ batteries from variable solar panel outputs (18V–40V) while maintaining constant-current/constant-voltage profiles. IC Role / Device Role / Timing Role: Wide-input buck-boost charger with programmable output current and accurate RUN-based start-up sequencing. Use Value: Supports MPPT-compatible input range and delivers up to 1A charge current with <30µA quiescent draw in night mode. | Use Scenario: Providing regulated 5V or 12V rails in factory automation controllers, PLCs, or motor drives powered from unregulated 24V/28V industrial supplies. IC Role / Device Role / Timing Role: Main DC/DC converter handling brownout, surge, and reverse-polarity events with integrated protection. Use Value: Withstands 40V transients and delivers 1A with 96% peak efficiency, reducing heatsink requirements in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115IFE-1#PBF | Higher 60V input rating, 2A output capability, and 2MHz switching frequency; same pinout and PROG interface | Better suited for 48V industrial or telecom systems requiring higher power and faster transient response | Select when input exceeds 40V or output current >1A is needed; retains layout compatibility |
| MAX20404ATPA/VY+ | 36V max input, 2.5A output, integrated MOSFETs, but lacks programmable average current and AEC-Q100 qualification | Targets cost-sensitive consumer or computing applications where constant-current precision is not required | Choose for higher output current at lower cost where automotive qualification and PROG-based current control are unnecessary |
Compared with LTC3115IFE-1#PBF, the LTC3114IFE-1#PBF offers tighter current-programming accuracy (±5% vs ±8%) and automotive qualification, while the MAX20404ATPA/VY+ provides higher output current but sacrifices programmable current control and automotive reliability assurance.
Availability
LTC3114IFE-1#PBF is available at Aetrix Electronics and suitable for automotive power systems, high-power LED drivers, solar battery charging systems, and 24V/28V industrial power supplies requiring stable component supply, long lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3114IFE-1#PBF 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3114-1 product line delivers wide-input, programmable-current buck-boost regulators designed for automotive, solar, and industrial power systems where seamless VIN/VOUT crossover, low quiescent current, and AEC-Q100 reliability are essential.
FAQ
What is the maximum input voltage rating for the LTC3114IFE-1#PBF?
The LTC3114IFE-1#PBF has an absolute maximum input voltage rating of 45V on VIN, PVIN, and PVOUT pins. Its operational input voltage range is specified from 2.2V to 40V, making it suitable for automotive battery systems experiencing load dump transients up to 40V. Operation beyond 40V is not guaranteed and may trigger overvoltage protection or cause permanent damage.
How does the PROG pin enable programmable output current in the LTC3114IFE-1#PBF?
The PROG pin on the LTC3114IFE-1#PBF delivers a current proportional to switch D current (40µA per ampere) with ±5% gain accuracy. By connecting a resistor from PROG to GND, users generate a voltage that sets the average output current threshold (e.g., 1V at PROG = 25kΩ yields 1A). This eliminates external current-sense amplifiers and enables precise constant-current operation for LED drivers or battery chargers.
Does the LTC3114IFE-1#PBF support seamless transition between buck and boost modes?
Yes, the LTC3114IFE-1#PBF uses a proprietary four-switch buck-boost architecture that ensures seamless, transient-free transitions when VIN crosses VOUT. Unlike conventional topologies, it maintains continuous regulation without output droop, overshoot, or subharmonic oscillation-verified in typical performance plots (Figures G28–G31) and confirmed in the OPERATION section of the datasheet.
What is the thermal performance difference between the DFN and TSSOP packages for the LTC3114IFE-1#PBF?
The LTC3114IFE-1#PBF in TSSOP (FE) package has θJA = 38°C/W on a standard 4-layer board, compared to 43°C/W for the DFN (DHC) variant. The TSSOP's lower thermal resistance results from its larger exposed pad area and optimized leadframe design, enabling higher sustained output current at elevated ambient temperatures without derating.
Is the LTC3114IFE-1#PBF qualified for automotive applications?
Yes, the LTC3114IFE-1#PBF is AEC-Q100 qualified for Grade I (–40°C to +125°C), with full reliability testing including temperature cycling, humidity bias HAST, and package robustness. Automotive-grade versions are marked with #WPBF suffix, but the standard #PBF variant meets the same qualification-confirmed in the ORDER INFORMATION table and Automotive Products footnote on page 3 of the datasheet.
LTC3114IFE-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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
LTC3114IFE-1#PBF FAQ
1.How can I place an order for LTC3114IFE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114IFE-1#PBF 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 LTC3114IFE-1#PBF reliable?
The price and inventory of LTC3114IFE-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3114IFE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3114IFE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114IFE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114IFE-1#PBF?
LTC3114IFE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114IFE-1#PBF 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 LTC3114IFE-1#PBF?
For technical support, including LTC3114IFE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114IFE-1#PBF requirements.
6.How does Aetrix verify that LTC3114IFE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3114IFE-1#PBF 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 LTC3114IFE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3114IFE-1#PBF?
All LTC3114IFE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114IFE-1#PBF, 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 LTC3114IFE-1#PBF part is unused and in its original packaging.
Return procedure for LTC3114IFE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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