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Analog Devices Inc. LTC3114EFE-1#PBF
- Part No.:
- LTC3114EFE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3114EFE-1#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,179
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Product details
Overview
LTC3114EFE-1#PBF 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 wide-output-range LED driving and battery charging in automotive and industrial power systems.
For engineers reviewing the LTC3114EFE-1#PBF datasheet, LTC3114EFE-1#PBF pinout, LTC3114EFE-1#PBF application, or LTC3114EFE-1#PBF equivalent, key selection criteria include its programmable output current via PROG pin, accurate RUN threshold (1.205V typ), Burst Mode® quiescent current (30µA), and TSSOP-16 package with exposed PGND pad for thermal management.
Technical Context
The LTC3114EFE-1#PBF employs proprietary four-switch buck-boost topology with internal N-channel DMOS switches (250mΩ RDS(ON) each) and average current-mode control to enable seamless transitions between buck, boost, and pass-through modes without subharmonics or output transients. Its 1.2MHz oscillator ensures low-noise operation and compact external components.
It integrates an internal 4.4V LDO (PLDO/LDO pins) for gate driver and bias supply, supports bootstrapped operation to reduce no-load IQ, and features factory-trimmed PROG current gain (40µA/A) and FB reference (1.0V ±2%). Overtemperature protection, soft-start (2ms), and short-circuit protection are built-in.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports 12V/24V/28V industrial rails, lead-acid, solar panel inputs, and wide automotive transients. |
| Output Voltage Range | 2.7V to 40V - programmable via FB divider; enables single-inductor regulation across buck/boost boundaries. |
| Max Output Current | 1A in buck mode - sufficient for high-power LED strings or 5V/12V system rails with minimal external components. |
| Switching Frequency | 1.2MHz (±200kHz) - enables use of small 6.8µH inductors and low-ESR ceramic capacitors for compact layout. |
| PROG Current Gain | 40µA per ampere of switch D current - enables precise average output current programming (±5% typical accuracy). |
| Burst Mode IQ | 30µA (bootstrapped) - extends battery life in always-on industrial sensors and automotive standby circuits. |
| Feedback Reference | 1.0V ±2% - simplifies output voltage setting with standard resistor dividers and improves line/load regulation. |
| Operating Temp Range | –40°C to +125°C - qualified for under-hood automotive and harsh industrial environments. |
Pinout & Package
Package: 16-lead plastic TSSOP (FE) with exposed PGND pad (Pin 17); thermally enhanced, θJA = 38°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1, 17) | Power Ground | Primary and exposed-pad return path for high-current switches; must be soldered to PCB ground plane for thermal and EMI performance. |
| SW2 (2) | Inductor Node (Boost Side) | Connects to one end of buck-boost inductor; carries full output current in boost mode and high-side switching current in buck mode. |
| PVOUT (3) | Power Output | High-current output node; requires ≥10µF low-ESR capacitor placed adjacent to IC with short PGND return path. |
| RUN (4) | Enable / UVLO Control | Accurate 1.205V turn-on threshold with 140mV hysteresis; enables custom input undervoltage lockout via resistive divider. |
| PROG (5) | Current Sense Output | Delivers 40µA/A proportional current from switch D; used with RPROG to set average output current (e.g., 27.4kΩ → 365mA). |
| VC (6) | Error Amplifier Output | Compensation node requiring external RC network (e.g., 1nF + 100kΩ + 100pF) to stabilize voltage loop. |
| FB (7) | Voltage Feedback Input | 1.0V reference input; sets VOUT = 1V × (1 + RTOP/RBOT); sensitive to noise-requires guarded routing away from SW nodes. |
| GND (8) | Signal Ground | Analog reference for control circuitry; must be star-connected to PGND at single point near IC. |
| LDO / PLDO (9, 11) | Internal LDO Supply | 4.4V regulated rail powering gate drivers and bias circuits; pins must be tied together with ≥4.7µF bypass capacitor. |
| VIN / PVIN (10, 14) | Main Input Supply | Input power connection; VIN and PVIN must be shorted on PCB; PVIN requires ≥10µF local bypass to PGND. |
| BST2 / BST1 (12, 13) | Flying Capacitor Drivers | Drive 68nF bootstrap caps for SW2 and SW1 gate drivers; traces must be short and direct to minimize ringing. |
| SW1 (15) | Inductor Node (Buck Side) | Connects to other end of buck-boost inductor; carries full input current in buck mode and low-side switching current in boost mode. |
| MODE (16) | Operation Mode Select | Logic-high = forced PWM (1.2MHz); logic-low = Burst Mode®; auto-transitions to PWM above ~300mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous buck-boost topology | Enables continuous regulation across VIN < VOUT, VIN > VOUT, and VIN ≈ VOUT without mode-switching glitches or subharmonics. |
| Programmable average output current | Set via single resistor on PROG pin (e.g., 499kΩ → 2mA); ±5% accuracy over temperature supports precision LED current or battery charge control. |
| 1.2MHz ultralow-noise PWM | Fixed frequency minimizes EMI filtering requirements and enables use of miniature 6.8µH inductors and ceramic capacitors. |
| Burst Mode® operation | Reduces no-load IQ to 30µA (bootstrapped), extending runtime in battery-powered applications while maintaining tight output regulation. |
| Integrated 4.4V LDO with PLDO output | Supplies gate drivers and internal circuitry; eliminates need for external bias rail and reduces BOM count in isolated or multi-rail systems. |
| Accurate RUN pin with hysteresis | 1.205V turn-on threshold ±10mV and 140mV hysteresis enable reliable, noise-immune startup/shutdown sequencing in automotive and industrial systems. |
Applications
| Automotive Power Systems | High-Power LED Driver |
|---|---|
Use Scenario: Regulating 12V/24V battery input to stable 5V/12V rail for infotainment, ADAS cameras, or body control modules during cold cranking or load dump. IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering 1A continuous output with seamless VIN-VOUT crossover and AEC-Q100-compliant thermal robustness. Use Value: Eliminates need for separate buck + boost stages; maintains regulation during 4V–40V input transients with <200mV output deviation. |
Use Scenario: Driving high-brightness LED arrays (e.g., headlamps, signage) requiring constant current up to 1A across varying forward voltages (3V–36V). IC Role / Device Role / Timing Role: Constant-current buck-boost controller using PROG pin feedback and FB-based voltage compliance. Use Value: Achieves ±3% LED current accuracy over temperature and line; supports analog/dimming via VC pin without external sense resistor. |
| 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 profile. IC Role / Device Role / Timing Role: Programmable current source with adaptive VOUT control; PROG sets charge current, FB adjusts absorption voltage. Use Value: Enables single-stage MPPT-adjacent charging with <5% current error and thermal foldback below 2V VOUT. |
Use Scenario: Generating isolated or non-isolated 5V/12V/15V rails from 24V/28V factory automation or railway power buses with high reliability. IC Role / Device Role / Timing Role: Main DC/DC regulator supporting wide input range, high efficiency (>92% at 500mA), and robust fault protection. Use Value: Delivers 1A output with integrated OCP, OTP, and soft-start; meets EN 55022 Class B EMI when laid out per layout guidelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8390AEMSE#PBF | Higher 60V input rating, 3.5A output, spread-spectrum EMI reduction; requires external MOSFETs and more complex compensation. | Better suited for >2A loads or >40V inputs (e.g., 48V telecom); less optimal for space-constrained 1A designs. | Select LT8390A if input exceeds 40V or output current >1A is required; LTC3114EFE-1#PBF offers lower BOM count and simpler layout for ≤1A. |
| TPS63020DSJR | Lower 16V max input, 2.5A output, 2.5MHz switching; no programmable current limit, only voltage regulation. | Ideal for portable 3.3V/5V rails from single-cell Li-ion; lacks PROG-based current control and automotive temp grade. | Choose TPS63020 for cost-sensitive consumer applications below 16V input; LTC3114EFE-1#PBF is preferred for programmable current, wide VIN, and industrial/automotive use. |
Compared with LT8390AEMSE#PBF and TPS63020DSJR, the LTC3114EFE-1#PBF uniquely combines 40V input, 1A output, programmable average current, and AEC-Q100 qualification in a compact TSSOP package-making it optimal for automotive LED drivers and industrial battery chargers where precision, ruggedness, and integration matter most.
Availability
LTC3114EFE-1#PBF is available at Aetrix Electronics and suitable for automotive power systems, high-power LED drivers, 12V/24V solar battery charging, and 24V/28V industrial power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant reliability.
Supply support for LTC3114EFE-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 (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 highly integrated, wide-input-range buck-boost regulators designed for automotive, industrial, and energy-harvesting applications demanding programmable current, low IQ, and seamless mode transitions.
FAQ
What is the maximum input voltage supported by the LTC3114EFE-1#PBF?
The LTC3114EFE-1#PBF supports an absolute maximum input voltage of 45V on VIN, PVIN, and PVOUT pins, with recommended operating range from 2.2V to 40V. This allows robust operation across automotive battery transients (e.g., load dump up to 40V) and industrial 24V/28V rails without external clamping.
How is average output current programmed on the LTC3114EFE-1#PBF?
Average output current on the LTC3114EFE-1#PBF is programmed using a resistor (RPROG) from the PROG pin to GND. With a PROG current gain of 40µA/A, RPROG = 1V / IOUT × 25000 yields the target current (e.g., 27.4kΩ sets ~365mA). The LTC3114EFE-1#PBF achieves ±5% accuracy over temperature and line.
Does the LTC3114EFE-1#PBF require external MOSFETs?
No, the LTC3114EFE-1#PBF integrates four N-channel DMOS power switches (250mΩ RDS(ON) each) and associated gate drivers. It operates as a fully monolithic buck-boost converter-no external MOSFETs are needed, reducing solution size and design complexity compared to controller-only alternatives.
What is the purpose of the MODE pin on the LTC3114EFE-1#PBF?
The MODE pin on the LTC3114EFE-1#PBF selects between Burst Mode® (MODE = low) for ultra-low IQ (30µA) at light loads and forced PWM mode (MODE = high) for fixed 1.2MHz operation with minimal output ripple. The LTC3114EFE-1#PBF automatically transitions to PWM above ~300mA to maintain regulation.
Is the LTC3114EFE-1#PBF qualified for automotive applications?
Yes-the LTC3114EFE-1#PBF is AEC-Q100 qualified for automotive applications (Grade E, –40°C to +125°C junction temperature). It includes integrated overtemperature protection, short-circuit protection, and robust ESD tolerance, making it suitable for under-hood and infotainment power systems.
LTC3114EFE-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
LTC3114EFE-1#PBF FAQ
1.How can I place an order for LTC3114EFE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114EFE-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 LTC3114EFE-1#PBF reliable?
The price and inventory of LTC3114EFE-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 LTC3114EFE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3114EFE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114EFE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114EFE-1#PBF?
LTC3114EFE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114EFE-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 LTC3114EFE-1#PBF?
For technical support, including LTC3114EFE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114EFE-1#PBF requirements.
6.How does Aetrix verify that LTC3114EFE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3114EFE-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 LTC3114EFE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3114EFE-1#PBF?
All LTC3114EFE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114EFE-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 LTC3114EFE-1#PBF part is unused and in its original packaging.
Return procedure for LTC3114EFE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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