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Analog Devices Inc. LTC3114HDHC-1#PBF
- Part No.:
- LTC3114HDHC-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3114HDHC-1#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,383
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Product details
Overview
LTC3114HDHC-1#PBF 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 ultralow-noise PWM, Burst Mode® operation (30µA no-load IQ), and AEC-Q100 qualification for automotive power systems.
For engineers reviewing the LTC3114HDHC-1#PBF datasheet, LTC3114HDHC-1#PBF pinout, LTC3114HDHC-1#PBF application, or LTC3114HDHC-1#PBF equivalent, key selection criteria include wide VIN/VOUT overlap capability, accurate RUN pin threshold (1.205V typ), integrated 4-switch topology, thermal robustness (–40°C to 150°C junction), and programmable current limit via PROG pin.
Technical Context
The LTC3114HDHC-1#PBF employs proprietary current-mode buck-boost PWM control with seamless mode transitions-no subharmonics or output transients when VIN crosses VOUT. Its four internal N-channel DMOS switches (250mΩ RDS(ON)) enable single-inductor operation across buck, boost, and pass-through regions.
Operation includes pin-selectable Burst Mode® (30µA no-load IQ) or fixed-frequency PWM (1.2MHz typ), with soft-start, overtemperature protection, short-circuit protection, and accurate RUN pin UVLO (1.205V threshold, 140mV hysteresis). The integrated LDO (4.4V, ±0.2V) powers internal circuitry and gate drivers via PLDO/LDO pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports 12V/24V/28V industrial and automotive battery inputs without pre-regulation |
| Output Voltage Range | 2.7V to 40V - regulates VOUT above, below, or equal to VIN using single inductor |
| Max Output Current | 1A in buck mode - sufficient for high-power LED drivers and 12V-to-12V regulators |
| Switching Frequency | 1.2MHz typical - enables compact 6.8µH inductor and low-profile ceramic capacitors |
| Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on automotive modules |
| Junction Temp Range | –40°C to 150°C - qualified per AEC-Q100 Grade H for under-hood automotive applications |
| PROG Current Gain | 40µA/A - enables precise average output current programming (±5% accuracy) with standard resistor |
Pinout & Package
Package: 16-lead 3mm × 5mm × 0.75mm plastic DFN (DHC) with exposed PGND pad (Pin 17) - thermally enhanced for 150°C operation; θJA = 43°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1, 17) | Power Ground | Primary and exposed-pad return path for high-current switch nodes; must be soldered to PCB ground plane for thermal and EMI performance |
| SW1 (15), SW2 (2) | Power Switch Terminals | Connect to opposite ends of single buck-boost inductor; carry full load current and switching ripple |
| PVIN (14), PVOUT (3) | Power Input/Output Rails | High-current paths for input capacitance (≥10µF) and output capacitance (≥10µF); require low-ESR ceramics and short traces |
| RUN (4) | Enable & UVLO Control | Accurate 1.205V threshold with 140mV hysteresis - enables custom input undervoltage lockout for battery monitoring |
| PROG (5) | Current Sense Output | Delivers 40µA per ampere of switch D current - used to program average output current or monitor load via external RC network |
| FB (7) | Voltage Feedback Input | 1.0V nominal reference - sets output voltage via resistive divider (VOUT = 1V × (1 + RTOP/RBOT)) |
| MODE (16) | Operating Mode Select | Logic-high = forced PWM (1.2MHz); logic-low = Burst Mode® - auto-transitions to PWM at higher loads |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous topology | Eliminates need for external MOSFETs or diodes; enables bidirectional VIN/VOUT regulation with >96% peak efficiency |
| Programmable average output current | Set via single resistor on PROG pin (±5% accuracy); supports constant-current LED driving and battery charging without sense resistor loss |
| 1.2MHz ultralow-noise PWM | Fixed frequency minimizes EMI filtering burden; proprietary control ensures seamless buck/boost transitions without output glitches |
| AEC-Q100 Grade H qualification | Validated for –40°C to 150°C junction operation - suitable for engine control units, ADAS cameras, and infotainment power rails |
| Integrated 4.4V LDO with PLDO supply | Powers internal logic and gate drivers; eliminates need for external bias rail - simplifies layout and reduces BOM count |
Applications
| Automotive Power Systems | High-Power LED Driver |
|---|---|
Use Scenario: Regulating 12V lead-acid or 24V truck battery to stable 12V for infotainment head units during cold cranking (VIN dips to 3.6V) or load dump (VIN surges to 40V). IC Role / Device Role / Timing Role: Buck-boost regulator maintaining regulated output despite wide input transients; operates continuously across buck, pass-through, and boost regions. Use Value: Eliminates need for separate buck + boost stages; AEC-Q100 H-grade ensures reliability at 150°C under hood. |
Use Scenario: Driving high-brightness LED arrays (e.g., headlights, DRLs) requiring constant current up to 1A with dimming via analog or PWM control. IC Role / Device Role / Timing Role: Constant-current source with programmable average output; PROG pin enables precision current setting independent of VOUT. Use Value: Replaces discrete current-source circuits; achieves ±5% current accuracy without external sense resistor power loss. |
| 12V/24V Solar Panel Battery Charging | 24V Industrial Power Supply |
Use Scenario: Charging sealed lead-acid or LiFePO₄ batteries from variable solar panel output (VIN = 18V–40V) while maintaining constant-current/constant-voltage profile. IC Role / Device Role / Timing Role: Programmable current source with adaptive output voltage; PROG pin sets charge current; FB pin configures CV stage. Use Value: Single-chip solution replaces multi-stage charger ICs; wide input range accommodates MPPT output fluctuations. |
Use Scenario: Generating stable 5V or 12V from unregulated 24V industrial bus subject to ripple, noise, and brownouts. IC Role / Device Role / Timing Role: Wide-input buck-boost regulator with Burst Mode® for low standby power and PWM mode for low-noise operation during active load. Use Value: Maintains regulation during 24V bus sag to 3.6V; 30µA quiescent current extends uptime in energy-sensitive PLC modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115EDHC-1#PBF | Same 4-switch architecture but 60V max input; lower 0.5A max output current; 2MHz switching frequency | Better suited for 48V telecom or PoE++ systems; less ideal for 1A automotive loads | Select when input exceeds 40V or higher switching frequency is required for smaller magnetics |
| MAX20404ATPA+T | 36V max input; 2.5A output; integrated FETs but no programmable current limit; no AEC-Q100 qualification | Higher current capacity but lacks PROG-based current programming and automotive temperature grade | Select for non-automotive 2.5A applications where current monitoring is not required |
Compared with LTC3115EDHC-1#PBF and MAX20404ATPA+T, the LTC3114HDHC-1#PBF uniquely combines 1A output, AEC-Q100 H-grade, and precise programmable current limiting in a 3mm × 5mm DFN - making it optimal for space-constrained, safety-critical automotive and industrial buck-boost designs.
Availability
LTC3114HDHC-1#PBF 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 across extended temperature ranges.
Supply support for LTC3114HDHC-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 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 robust, wide-input buck-boost regulation for harsh environments - designed specifically for automotive under-hood power conversion, battery-powered industrial equipment, and high-reliability LED lighting systems.
FAQ
What is the maximum junction temperature rating for the LTC3114HDHC-1#PBF?
The LTC3114HDHC-1#PBF is rated for operation from –40°C to 150°C junction temperature and is AEC-Q100 qualified for Grade H automotive applications. This rating is confirmed in the Absolute Maximum Ratings table and applies specifically to the HDHC package variant with exposed PGND pad soldered to the PCB ground plane.
How is average output current programmed on the LTC3114HDHC-1#PBF?
Average output current on the LTC3114HDHC-1#PBF is programmed using a resistor from the PROG pin to GND. With a PROG current gain of 40µA/A, the resistor value is calculated as RPROG = 1V × 25000 / IOUT(A). For example, a 25kΩ resistor sets 1A average output current. Factory trimming ensures ±5% accuracy across temperature.
Does the LTC3114HDHC-1#PBF support both Burst Mode® and PWM operation?
Yes, the LTC3114HDHC-1#PBF supports both modes via the MODE pin: logic high forces continuous 1.2MHz PWM operation for low-noise applications, while logic low enables Burst Mode® for ultra-low quiescent current (30µA no-load with bootstrapped LDO). The device automatically transitions to PWM under heavy load regardless of MODE pin state.
What package type and thermal characteristics does the LTC3114HDHC-1#PBF use?
The LTC3114HDHC-1#PBF uses a 16-lead 3mm × 5mm plastic DFN (DHC) package with an exposed PGND pad (Pin 17). Its thermal resistance is θJA = 43°C/W on a 4-layer board and θJC = 4°C/W, enabling reliable 150°C junction operation when the exposed pad is properly soldered to the PCB ground plane.
Can the LTC3114HDHC-1#PBF regulate output voltage when input voltage equals output voltage?
Yes, the LTC3114HDHC-1#PBF regulates VOUT across all conditions - including when VIN = VOUT - using its proprietary four-switch buck-boost topology. Unlike traditional SEPIC or flyback converters, it provides seamless, transient-free pass-through operation without mode switching artifacts or subharmonic instability.
LTC3114HDHC-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3114HDHC-1#PBF FAQ
1.How can I place an order for LTC3114HDHC-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114HDHC-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 LTC3114HDHC-1#PBF reliable?
The price and inventory of LTC3114HDHC-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 LTC3114HDHC-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3114HDHC-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114HDHC-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114HDHC-1#PBF?
LTC3114HDHC-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114HDHC-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 LTC3114HDHC-1#PBF?
For technical support, including LTC3114HDHC-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114HDHC-1#PBF requirements.
6.How does Aetrix verify that LTC3114HDHC-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3114HDHC-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 LTC3114HDHC-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3114HDHC-1#PBF?
All LTC3114HDHC-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114HDHC-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 LTC3114HDHC-1#PBF part is unused and in its original packaging.
Return procedure for LTC3114HDHC-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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