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Analog Devices Inc. LTC3114IFE-1#TRPBF
- Part No.:
- LTC3114IFE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3114IFE-1#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,672
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Product details
Overview
LTC3114IFE-1#TRPBF from Analog Devices is a 40V, 1A synchronous buck-boost DC/DC converter with programmable average output current, current-mode control, and 1.2MHz fixed-frequency PWM operation. It regulates VOUT above, below, or equal to VIN (2.2V–40V), delivers up to 96% efficiency, and supports automotive-grade operation (–40°C to 125°C) in a 16-lead TSSOP package.
For engineers reviewing the LTC3114IFE-1#TRPBF datasheet, LTC3114IFE-1#TRPBF pinout, LTC3114IFE-1#TRPBF application, or LTC3114IFE-1#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed operating ranges, real-world application mappings, and two rigorously cross-checked alternative parts for industrial power, LED driver, and battery charging designs.
Technical Context
The LTC3114IFE-1#TRPBF uses proprietary four-switch synchronous buck-boost topology with internal N-channel DMOS switches (250mΩ RDS(ON) each) and average current-mode control. Its 1.2MHz oscillator enables compact magnetics while maintaining low noise across input voltages from 2.2V to 40V and output voltages from 2.7V to 40V.
Programmable average output current is implemented via PROG pin current sensing (40µA/A gain), with accurate RUN pin threshold (1.205V typ, ±140mV hysteresis) enabling custom UVLO. Burst Mode® operation achieves 30µA no-load IQ when bootstrapped, and integrated soft-start, overtemperature, and short-circuit protection ensure robust system-level operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports wide-source applications including 12V/24V lead-acid, solar panels, and automotive batteries. |
| Output Voltage Range | 2.7V to 40V - enables regulation above, below, or equal to input without mode switching artifacts. |
| Max Output Current | 1A in buck mode - sufficient for high-power LED drivers and industrial 5V/12V point-of-load supplies. |
| Switching Frequency | 1.2MHz (±200kHz) - allows use of small 6.8µH inductors and minimizes EMI in space-constrained layouts. |
| Efficiency | Up to 96% - achieved with synchronous rectification and low RDS(ON) internal MOSFETs, reducing thermal load. |
| Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on industrial sensors and telematics. |
| Operating Temp Range | –40°C to 125°C - qualified per AEC-Q100 for under-hood automotive and harsh-environment industrial use. |
Pinout & Package
Package: 16-lead plastic TSSOP (FE), 5mm × 4.4mm × 1.1mm body, exposed PGND pad (Pin 17) for thermal and electrical performance. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1, 17) | Power Ground | Primary return path for high-current switch nodes; exposed pad must be soldered to PCB ground plane for thermal integrity and low-noise operation. |
| SW2 (2) | Buck-Boost Switch Node | Connects to one end of inductor; carries full output current in boost mode and partial current in buck mode. |
| PVOUT (3) | Power Output | High-current output rail requiring ≥10µF low-ESR capacitor close to IC; Schottky clamp recommended for inductive short-circuit protection. |
| RUN (4) | Enable / UVLO Control | Accurate 1.205V turn-on threshold with 140mV hysteresis - enables precise input voltage sequencing and brownout recovery. |
| PROG (5) | Current Sense Output | Delivers 40µA/A proportional current for programming average output current or diagnostic monitoring via external resistor. |
| VC (6) | Error Amplifier Output | Requires external RC compensation network to stabilize loop; determines transient response and phase margin. |
| FB (7) | Voltage Feedback Input | 1.0V reference node - sets VOUT via resistive divider; sensitive to SW node coupling; requires careful layout. |
| GND (8) | Signal Ground | Reference for control circuitry only; must be star-connected to PGND at single point to avoid noise injection. |
| LDO (9) | Internal Bias Supply Input | Supplies core logic; must be tied to PLDO; requires ≥4.7µF bypass capacitor for stable gate drive. |
| VIN (10) | LDO Supply Connection | Connects to PVIN; powers internal VCC regulator; trace length >5mm requires local 1µF decoupling. |
| PLDO (11) | Internal LDO Output | Provides gate drive voltage for all internal switches; must be tied to LDO; supplies both logic and power domains. |
| BST2 (12) | Flying Capacitor for SW2 | Drives gate of switch D via 68nF capacitor; trace must be short and direct to minimize ringing and gate drive loss. |
| BST1 (13) | Flying Capacitor for SW1 | Drives gate of switch A via 68nF capacitor; same layout constraints as BST2 for reliable high-side switching. |
| PVIN (14) | Power Input | Main input rail requiring ≥10µF low-ESR capacitor; ground connection must via directly to PGND plane. |
| SW1 (15) | Buck-Boost Switch Node | Connects to other end of inductor; carries full input current in boost mode and partial current in buck mode. |
| MODE (16) | Operation Mode Select | Logic-high = forced PWM (1.2MHz); logic-low = Burst Mode; auto-transitions to PWM at ~300mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous buck-boost topology | Enables seamless VIN-to-VOUT regulation across all ratios without discontinuous conduction or subharmonic oscillation. |
| Programmable average output current (via PROG) | ±5% accuracy over temperature using standard resistor; supports constant-current LED driving and battery charging without external sense amp. |
| 1.2MHz fixed-frequency PWM with Burst Mode | Reduces output ripple in PWM mode and cuts no-load IQ to 30µA in Burst Mode - ideal for battery-backed systems. |
| Accurate RUN pin with hysteresis | 1.205V nominal threshold and 140mV hysteresis enable precise, glitch-immune input voltage sequencing and brownout recovery. |
| Integrated protection suite | Includes soft-start, overtemperature shutdown, short-circuit current limiting (2.6A), and IZERO detection (100mA) - eliminates need for external fault management. |
Applications
| Automotive Power Systems | High-Power LED Driver |
|---|---|
Use Scenario: Regulating 12V/24V vehicle battery to stable 5V/12V for infotainment, ADAS cameras, or lighting modules under cold-crank (4.5V) and load-dump (40V) conditions. IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering regulated output regardless of input transients; operates continuously across full automotive temperature range. Use Value: Eliminates need for pre-regulator + LDO cascade; withstands AEC-Q100 stress profiles; reduces BOM count by integrating current limit, UVLO, and thermal protection. |
Use Scenario: Driving high-brightness LEDs from variable-input sources such as solar panels or 12V/24V industrial rails, requiring constant current with tight regulation. IC Role / Device Role / Timing Role: Constant-current buck-boost controller using PROG pin feedback; maintains LED brightness independent of input or forward voltage drift. Use Value: Achieves ±5% current accuracy without external sense resistor or op-amp; supports dimming via VC or MODE pin; enables single-inductor design for compact form factor. |
| 12V/24V Solar Panel Battery Charging | 24V/28V Industrial Power Supply |
Use Scenario: Charging sealed lead-acid or LiFePO4 batteries from solar arrays with wide VIN variation (15V–40V) and precise constant-current/constant-voltage profiles. IC Role / Device Role / Timing Role: Programmable CC/CV charger controller; PROG sets charge current; FB sets float voltage; RUN enables/disable based on battery state. Use Value: Supports MPPT integration via external microcontroller; avoids external current-sense amplifier; maintains >90% efficiency across full solar irradiance range. |
Use Scenario: Providing isolated or non-isolated 5V/12V/15V rails in factory automation controllers, PLC I/O modules, or motor drives where input is 24V/28V industrial bus. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC regulator handling line transients and load steps; delivers up to 1A with <200mV load regulation. Use Value: Replaces discrete buck+boost solutions; sustains operation during 24V bus dips to 18V; meets EN 55022 Class B EMI with proper layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115IFE-1#TRPBF | Same 16-lead TSSOP package; wider 2.7V–60V input range; higher 2A output capability; 2MHz switching frequency. | Supports higher-power loads and ultra-wide input sources (e.g., 48V telecom, HV battery packs); less suitable for cost-sensitive 1A designs. | Select when >1A output or >40V input is required; verify layout compatibility due to higher switching frequency and thermal demands. |
| MAX20404ATPA/VY+ | 3.5V–36V input; 3.3V/5V/12V fixed-output options; 2.2MHz switching; integrated inductor option available. | Optimized for fixed-output, lower-current (600mA) applications; lacks programmable current limit and wide VOUT adjustability. | Choose for simplified fixed-output designs where PROG-based current programming is unnecessary and board space is critical. |
Compared with LTC3114IFE-1#TRPBF, LTC3115IFE-1#TRPBF offers higher voltage/current headroom at the cost of increased quiescent current and layout complexity, while MAX20404ATPA/VY+ trades programmability and flexibility for integration and ease-of-use in fixed-rail applications.
Availability
LTC3114IFE-1#TRPBF is available at Aetrix Electronics and suitable for automotive power systems, high-power LED drivers, solar battery chargers, and 24V industrial power supplies requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LTC3114IFE-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 (now part of Analog Devices, Inc., a wholly owned subsidiary of Analog Devices, Inc.) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC3114-1 product line delivers wide-input, programmable-current buck-boost regulators designed for automotive, industrial, and energy-harvesting applications where input voltage varies widely and precise current control is essential.
FAQ
What is the maximum input voltage rating for the LTC3114IFE-1#TRPBF?
The LTC3114IFE-1#TRPBF 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. Exceeding 45V risks permanent damage; sustained operation above 40V violates guaranteed specifications and may degrade reliability. The device is rated for automotive load-dump events up to 40V with appropriate input filtering.
How is average output current programmed on the LTC3114IFE-1#TRPBF?
Average output current on the LTC3114IFE-1#TRPBF is programmed using a resistor (RPROG) from the PROG pin to GND. The PROG pin delivers a current proportional to switch D current at 40µA per ampere. To set a target IOUT, use RPROG = 1V / (IOUT × 40µA/A). For example, 500mA requires RPROG = 50kΩ. Accuracy is typically ±5% over temperature and line/load conditions.
Does the LTC3114IFE-1#TRPBF support both buck and boost modes simultaneously?
The LTC3114IFE-1#TRPBF does not operate in "simultaneous" buck and boost modes. Instead, it uses a four-switch synchronous topology that automatically and seamlessly transitions between buck, boost, or buck-boost (pass-through) operation based on instantaneous VIN/VOUT ratio. No external control or mode pin is needed - the internal control algorithm manages all transitions without output glitches or subharmonic instability.
What is the purpose of the MODE pin on the LTC3114IFE-1#TRPBF?
The MODE pin on the LTC3114IFE-1#TRPBF selects between Burst Mode® operation (MODE = low) and forced continuous PWM operation (MODE = high). In Burst Mode, the converter pulses only as needed to maintain regulation, achieving 30µA no-load IQ. In PWM mode, it runs continuously at 1.2MHz, minimizing output ripple and EMI. At light loads with MODE low, it auto-transitions to PWM if load exceeds ~300mA.
Is the LTC3114IFE-1#TRPBF pin-compatible with other LTC3114-x variants?
Yes, the LTC3114IFE-1#TRPBF is pin-compatible with all other LTC3114-1 variants in the same package type - specifically, all FE-package versions (e.g., LTC3114EFE-1#TRPBF, LTC3114HFE-1#TRPBF) share identical pinout, footprint, and electrical interface. Temperature grade differences (E/I/H/MP) affect only operating range and reliability testing - not pin function or layout.
LTC3114IFE-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
LTC3114IFE-1#TRPBF FAQ
1.How can I place an order for LTC3114IFE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114IFE-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 LTC3114IFE-1#TRPBF reliable?
The price and inventory of LTC3114IFE-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 LTC3114IFE-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3114IFE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114IFE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114IFE-1#TRPBF?
LTC3114IFE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114IFE-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 LTC3114IFE-1#TRPBF?
For technical support, including LTC3114IFE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114IFE-1#TRPBF requirements.
6.How does Aetrix verify that LTC3114IFE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3114IFE-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 LTC3114IFE-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3114IFE-1#TRPBF?
All LTC3114IFE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114IFE-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 LTC3114IFE-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3114IFE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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