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Analog Devices Inc. LTC3114IDHC-1#PBF
- Part No.:
- LTC3114IDHC-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3114IDHC-1#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,207
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Product details
Overview
LTC3114IDHC-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 automotive-grade operation from –40°C to 125°C in a thermally enhanced 16-lead 3mm × 5mm DFN package. It is used in 12V/24V solar battery charging systems requiring wide-input, constant-current regulation.
For engineers reviewing the LTC3114IDHC-1#PBF datasheet, LTC3114IDHC-1#PBF pinout, LTC3114IDHC-1#PBF application, or LTC3114IDHC-1#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world application implementation guidance for industrial and automotive power systems.
Technical Context
The LTC3114IDHC-1#PBF employs proprietary four-switch synchronous buck-boost topology with internal N-channel DMOS switches (RDS(ON) = 250mΩ each) and seamless mode transitions-no subharmonics or output transients during buck-to-boost crossover. Its average current-mode control loop uses a 1V reference FB pin and VC-compensated error amplifier for fast line/load transient response and inherent input rejection.
Operation includes user-selectable Burst Mode® (30µA no-load IQ) or continuous 1.2MHz PWM via MODE pin, accurate RUN pin UVLO (1.205V threshold, 140mV hysteresis), and integrated soft-start (2ms). Programmable output current is set by external resistor on PROG pin with ±5% accuracy, independent of operating mode and functional down to ~2V VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports 12V lead-acid, 24V industrial rails, and 36V solar inputs without pre-regulation |
| Output Voltage Range | 2.7V to 40V - enables single-inductor regulation across buck, boost, and pass-through regions |
| Max Output Current | 1A in buck mode - sufficient for high-power LED drivers and battery charge circuits at VIN ≥ VOUT |
| Switching Frequency | 1.2MHz (±200kHz) - allows compact 6.8µH inductor and low-profile ceramic capacitors |
| Efficiency | Up to 96% - achieved via synchronous rectification and low RDS(ON) internal MOSFETs |
| Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on automotive modules |
| Operating Temp Range | –40°C to 125°C - qualified per AEC-Q100 for under-hood and industrial control applications |
Pinout & Package
Package: 16-lead 3mm × 5mm × 0.75mm plastic DFN (DHC) with exposed PGND pad (Pin 17) - requires soldering to PCB ground plane for thermal performance (θJA = 43°C/W, θJC = 4°C/W).
| 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 and EMI integrity |
| SW2 (2) | Buck-Boost Switch Node | Connects to one end of inductor; carries full switching current in both buck and boost modes |
| PVOUT (3) | Power Output | High-current output rail; requires ≥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) | Output Current Sense | Delivers 40µA/A proportional current; sets average output current via external resistor (e.g., 25kΩ for 1A) |
| VC (6) | Error Amplifier Output | Compensation node requiring external RC network (e.g., 1nF + 10kΩ + 220pF) for loop stability |
| FB (7) | Voltage Feedback Input | 1.0V reference point; output voltage set by resistive divider (VOUT = 1V × (1 + RTOP/RBOT)) |
| GND (8) | Signal Ground | Reference for control circuitry; must be star-connected to PGND near IC to avoid noise coupling |
| LDO / PLDO (9, 11) | Internal Regulator Rails | 4.4V LDO output powers gate drivers and bias circuits; pins must be tied together with ≥4.7µF bypass |
| VIN / PVIN (10, 14) | Main Input Supply | Input power connection; VIN and PVIN must be shorted on PCB with local 10µF bypass to PGND |
| BST1 / BST2 (12, 13) | Flying Capacitor Terminals | Drive gate drivers for SW1/SW2; require 68nF ceramic caps placed <1mm from IC with minimal trace inductance |
| SW1 (15) | Buck-Boost Switch Node | Second inductor connection point; shares same current path as SW2 but opposite phase in 4-switch operation |
| MODE (16) | Operation Mode Select | Logic-high = forced PWM (1.2MHz); logic-low = Burst Mode (30µA IQ) with auto-transition to PWM at high load |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous buck-boost topology | Enables seamless VIN-to-VOUT conversion without external diodes or mode-switching transients |
| Programmable average output current | ±5% accuracy over temperature via PROG pin; supports constant-current LED drive and battery charging |
| 1.2MHz fixed-frequency PWM with Burst Mode | Reduces EMI in noise-sensitive systems while maintaining 30µA no-load quiescent current |
| Integrated 4.4V LDO with PLDO supply | Powers internal gate drivers and bias circuits - eliminates need for external LDO in most designs |
| Accurate RUN pin UVLO with hysteresis | 1.205V ±20mV threshold and 140mV hysteresis enable reliable system power sequencing |
| AEC-Q100 qualified (Grade I) | Validated for automotive applications including infotainment, ADAS sensors, and body electronics |
Applications
| 12V/24V Solar Panel Battery Charging | Automotive Power Systems |
|---|---|
Use Scenario: Regulating variable solar panel output (18–40V) to charge 12V lead-acid or LiFePO4 batteries with precise current limiting. IC Role / Device Role / Timing Role: Primary buck-boost regulator with programmable average output current and wide-input tracking. Use Value: Eliminates need for separate MPPT controller and linear charger; achieves >94% efficiency across full solar irradiance range. |
Use Scenario: Powering infotainment head units from vehicle battery (6–16V) while maintaining stable 5V/12V rails during cold-crank transients. IC Role / Device Role / Timing Role: Wide-input DC/DC converter with UVLO hysteresis and AEC-Q100 qualification for under-hood reliability. Use Value: Sustains operation during 4.5V cranking dips; 125°C rating ensures functionality in engine bay environments. |
| High-Power LED Driver | 24V Industrial Power Supply |
Use Scenario: Driving 3–5 series white LEDs (9–18V) from 12V or 24V bus with dimming via PROG pin voltage modulation. IC Role / Device Role / Timing Role: Constant-current source with analog/digital current programming and thermal foldback. Use Value: Delivers 1A LED current with <±2% regulation; PROG-based dimming avoids PWM-induced EMI in sensitive RF modules. |
Use Scenario: Generating regulated 5V/3.3V rails from unregulated 24V factory automation bus subject to ripple and surges. IC Role / Device Role / Timing Role: Primary isolated-capable buck-boost stage with low-noise 1.2MHz PWM and robust input protection. Use Value: Maintains regulation during 200ms brownouts; 40V abs max rating withstands 30V transients per IEC 61000-4-5. |
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, 3.5A output; requires external MOSFETs; 2MHz switching; no integrated LDO | Better suited for >2A loads and higher-voltage industrial systems; lacks PROG-based current programming | Select when >1A output or >40V input is required; expect larger BOM and layout complexity |
| TPS63020DSJR | Lower 5.5V max input; 2.5A output; 2.5MHz switching; no programmable current limit; smaller 2mm × 2mm QFN | Ideal for portable 3.3V/5V systems with tight space constraints; not rated for automotive temp or >12V input | Choose for cost-sensitive consumer devices with ≤5.5V input; avoid for solar, automotive, or constant-current use cases |
Compared with LT8390AEMSE#PBF and TPS63020DSJR, the LTC3114IDHC-1#PBF uniquely combines 40V input, 1A programmable current, integrated LDO, AEC-Q100 qualification, and seamless buck-boost operation in a single monolithic DFN - making it optimal for mid-power automotive and industrial power conversion where precision, reliability, and integration are prioritized over raw current or voltage headroom.
Availability
LTC3114IDHC-1#PBF is available at Aetrix Electronics and suitable for 12V/24V solar battery charging systems, automotive infotainment power supplies, and high-power LED driver designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3114IDHC-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., following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3114-1 belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters, designed specifically for wide-input, high-efficiency, and automotive-qualified power conversion in noise-sensitive and thermally constrained environments.
FAQ
What is the maximum input voltage rating for the LTC3114IDHC-1#PBF?
The LTC3114IDHC-1#PBF has an absolute maximum input voltage rating of 45V on VIN, PVIN, and PVOUT pins. Its specified operating input voltage range is 2.2V to 40V, enabling direct interface with 24V industrial buses, 36V solar arrays, and automotive 12V/24V systems including cold-crank and load-dump conditions. Operation beyond 40V is not guaranteed and may trigger overvoltage protection or damage the device.
How is output current programmed on the LTC3114IDHC-1#PBF?
Output current is programmed on the LTC3114IDHC-1#PBF using an external resistor (RPROG) from the PROG pin to GND. The PROG pin delivers a current proportional to switch D current (ISWD/25000), so RPROG = 1V × 25000 / IOUT. For example, a 25kΩ resistor sets 1A average output current. The LTC3114IDHC-1#PBF maintains ±5% accuracy across temperature and line conditions without requiring external sense resistors.
Does the LTC3114IDHC-1#PBF support both buck and boost operation in the same design?
Yes, the LTC3114IDHC-1#PBF supports true buck-boost operation - regulating VOUT whether VIN is above, below, or equal to VOUT - using its integrated four-NMOS switch topology. Unlike two-switch buck-boost ICs, it transitions seamlessly between modes with no output glitches, subharmonics, or need for external mode-control circuitry. This capability is intrinsic to the LTC3114IDHC-1#PBF's architecture and requires no configuration.
What package and thermal characteristics apply to the LTC3114IDHC-1#PBF?
The LTC3114IDHC-1#PBF uses a 16-lead 3mm × 5mm × 0.75mm plastic DFN (DHC) package with an exposed PGND pad (Pin 17). Its thermal resistance is θJA = 43°C/W (4-layer board) and θJC = 4°C/W. To achieve rated performance, the exposed pad must be soldered to a PCB ground plane; failure to do so degrades thermal dissipation and may cause premature thermal shutdown under 1A load.
Is the LTC3114IDHC-1#PBF qualified for automotive applications?
Yes, the LTC3114IDHC-1#PBF is AEC-Q100 qualified for Grade I (–40°C to +125°C ambient), meeting stress test requirements for automotive power systems. It is explicitly listed in Analog Devices' automotive product documentation and supports applications including body control modules, ADAS sensors, and infotainment power supplies. The "I" in the part number denotes Industrial/Automotive temperature grade.
LTC3114IDHC-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN 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-DFN (5x3)
LTC3114IDHC-1#PBF FAQ
1.How can I place an order for LTC3114IDHC-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114IDHC-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 LTC3114IDHC-1#PBF reliable?
The price and inventory of LTC3114IDHC-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 LTC3114IDHC-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3114IDHC-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114IDHC-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114IDHC-1#PBF?
LTC3114IDHC-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114IDHC-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 LTC3114IDHC-1#PBF?
For technical support, including LTC3114IDHC-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114IDHC-1#PBF requirements.
6.How does Aetrix verify that LTC3114IDHC-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3114IDHC-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 LTC3114IDHC-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3114IDHC-1#PBF?
All LTC3114IDHC-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114IDHC-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 LTC3114IDHC-1#PBF part is unused and in its original packaging.
Return procedure for LTC3114IDHC-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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