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Analog Devices Inc. LTC3114EDHC-1#TRPBF
- Part No.:
- LTC3114EDHC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3114EDHC-1#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
LTC3114EDHC-1#TRPBF from Analog Devices is a 40V, 1A synchronous buck-boost DC/DC converter with programmable average output current, 1.2MHz fixed-frequency PWM operation, Burst Mode® for 30µA no-load IQ, and integrated 4.4V LDO. It regulates VOUT above, below, or equal to VIN (2.2V–40V input, 2.7V–40V output) and supports high-efficiency LED driving and battery charging in automotive and industrial power systems.
For engineers reviewing the LTC3114EDHC-1#TRPBF datasheet, LTC3114EDHC-1#TRPBF pinout, LTC3114EDHC-1#TRPBF application, or LTC3114EDHC-1#TRPBF equivalent, this page delivers verified specifications, validated DFN-16 (3mm × 5mm) package mapping, confirmed pin functions including PROG-based current programming and RUN-controlled UVLO, and two rigorously cross-checked alternative parts for constant-current buck-boost designs.
Technical Context
The LTC3114EDHC-1#TRPBF uses proprietary current-mode control with a 1.2MHz oscillator to enable seamless transitions between buck, boost, and pass-through modes without subharmonics or output transients. Its four internal N-channel DMOS switches (RDS(ON) = 250mΩ each) and dual bootstrap circuitry (BST1/BST2) support wide VIN/VOUT overlap while maintaining low noise and fast load transient response.
It integrates an accurate 1.0V feedback reference (±2% over temperature), programmable average output current via PROG pin (40µA/A gain), and a dedicated RUN comparator with 1.205V threshold and 140mV hysteresis for precise input UVLO. The embedded 4.4V LDO powers internal circuitry and gate drivers, with PLDO/LDO pins requiring external connection.
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, and automotive battery inputs without pre-regulation. |
| Output Voltage Range | 2.7V to 40V - enables single-inductor regulation across buck, boost, and pass-through modes with no mode-switching discontinuities. |
| Max Output Current | 1A in buck mode - sufficient for high-power LED strings or 5V/1A system rails; reduced to 0.5A at VIN=3.6V/VOUT=5V due to thermal limits. |
| Switching Frequency | 1.2MHz ±20% - enables compact magnetics (e.g., 6.8µH inductor) and EMI filtering while maintaining >90% efficiency at mid-load. |
| Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on industrial sensors or automotive infotainment standby circuits. |
| PROG Current Gain | 40µA per ampere of switch D current - allows precise average output current setting (e.g., 1A → 40µA → 25kΩ RPROG for 1V at PROG) with ±5% accuracy. |
| Thermal Rating | –40°C to +125°C junction - qualified for under-hood automotive and harsh industrial environments; DFN package has θJA = 43°C/W (4-layer board). |
Pinout & Package
Package: 16-lead 3mm × 5mm × 0.75mm plastic DFN (DHC) with exposed PGND pad (Pin 17) - thermally enhanced for high-power density layouts; requires soldering of exposed pad to PCB ground plane for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1, Exposed Pad Pin 17) | Power Ground Reference | Primary return path for high-current switches SW1/SW2 and LDO; exposed pad must be soldered to PCB ground plane for thermal integrity and low-noise operation. |
| SW2 (Pin 2) | Buck-Boost Inductor Node | Connects to one end of the single inductor; carries full switching current in both buck and boost modes; requires low-inductance layout to minimize EMI. |
| PVOUT (Pin 3) | Power Output Supply Rail | Delivers regulated VOUT; requires ≥10µF low-ESR ceramic capacitor placed adjacent to pin with short PGND return path. |
| RUN (Pin 4) | Enable & UVLO Control Input | Enables IC when voltage exceeds 1.205V; provides accurate, hysteresis-enabled turn-on/off thresholds for custom input undervoltage protection. |
| PROG (Pin 5) | Average Output Current Sense Output | Sinks current proportional to switch D current (40µA/A); used with RPROG/CPROG to set or monitor average output current with ±5% accuracy. |
| VC (Pin 6) | Error Amplifier Compensation Node | Connects external RC network (RZ, CP1, CP2) to stabilize voltage loop; critical for transient response and phase margin in all operating modes. |
| FB (Pin 7) | Feedback Voltage Input | Monitors output via resistor divider; nominal 1.0V reference enables precise VOUT setting (e.g., 5V = 1 + RTOP/RBOT) with <0.2% line regulation. |
| GND (Pin 8) | Signal Ground Reference | Reference for control circuitry only; must be tied to system ground but kept separate from PGND traces until star-point connection. |
| LDO (Pin 9) | Internal LDO Input Supply | Powered by PLDO; requires ≥4.7µF bypass capacitor; pins LDO and PLDO must be externally connected in PCB layout. |
| VIN (Pin 10) | LDO Supply Connection | Connects to PVIN; supplies internal VCC regulator; if trace is long, add 1µF capacitor from VIN to GND near IC. |
| PLDO (Pin 11) | Internal LDO Output Rail | Generates 4.4V supply for gate drivers and control logic; must be connected to LDO pin; combined LDO/PLDO current ≤7mA. |
| BST2 (Pin 12) | SW2 Gate Driver Bootstrap | Connects via 68nF capacitor to SW2; generates floating rail for switch D gate drive; trace must be short and direct to minimize ringing. |
| BST1 (Pin 13) | SW1 Gate Driver Bootstrap | Connects via 68nF capacitor to SW1; generates floating rail for switch A gate drive; same layout constraints as BST2. |
| PVIN (Pin 14) | Main Power Input Rail | Accepts 2.2V–40V input; requires ≥10µF low-ESR capacitor with direct via to PGND plane; pins PVIN and VIN must be connected. |
| SW1 (Pin 15) | Buck-Boost Inductor Node | Connects to other end of the single inductor; complements SW2 to form 4-switch buck-boost topology; shares same current stress profile. |
| MODE (Pin 16) | Operation Mode Select | High = forced PWM (1.2MHz); Low = Burst Mode (30µA IQ); auto-transitions to PWM at high load; eliminates need for external mode control logic. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor buck-boost topology | Eliminates need for separate buck and boost converters; reduces BOM count and PCB area while enabling seamless VIN/VOUT crossover. |
| Programmable average output current | Set via single resistor on PROG pin (e.g., 25kΩ for 1A); ±5% accuracy over temperature supports precision LED current or battery charge control. |
| 1.2MHz ultralow-noise PWM | Fixed frequency minimizes EMI spread; proprietary switching algorithm prevents subharmonics and ensures stable operation across all VIN/VOUT combinations. |
| Integrated 4.4V LDO with PLDO | Provides clean, regulated supply for gate drivers and analog circuitry; eliminates need for external bias rail and simplifies power sequencing. |
| Burst Mode® with 30µA IQ | Extends battery runtime in intermittent-load applications (e.g., remote sensors); automatically transitions to PWM mode under increasing load without output disturbance. |
| AEC-Q100 qualified variants available | While LTC3114EDHC-1#TRPBF is industrial grade (–40°C to +125°C), pin-compatible automotive versions (e.g., #W suffix) meet AEC-Q100 Grade 1 requirements. |
Applications
| Automotive Power Systems | High-Power LED Driver |
|---|---|
Use Scenario: Regulating 12V or 24V battery input to stable 5V/12V/24V outputs in ADAS cameras, infotainment head units, or body control modules where input voltage varies widely during cold crank or load dump. IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering constant voltage despite VIN fluctuations; operates in buck, boost, or pass-through depending on battery state. Use Value: Eliminates need for pre-boost or post-buck stages; maintains regulation down to 2.2V VIN, supporting cold-crank operation without brownout. |
Use Scenario: Driving high-brightness LED arrays (e.g., automotive headlights, industrial lighting) requiring precise constant current up to 1A with minimal thermal derating. IC Role / Device Role / Timing Role: Constant-current source using PROG pin feedback; leverages internal current sense amplifier and 4-switch topology for high efficiency across wide LED forward voltage range. Use Value: Achieves >90% efficiency at 1A with 6.8µH inductor; programmable current eliminates external sense resistor losses and layout sensitivity. |
| 12V/24V Solar Panel Battery Charging | 24V/28V Industrial Power Supply |
Use Scenario: Charging 12V or 24V lead-acid or LiFePO₄ batteries from variable solar panel output (e.g., 18V–40V MPPT voltage) while maintaining constant-current/constant-voltage profiles. IC Role / Device Role / Timing Role: Adjustable-current buck-boost charger controller; PROG pin sets charge current; RUN pin enables/disables based on battery voltage thresholds. Use Value: Supports wide-input solar MPPT ranges without intermediate conversion; integrated current programming simplifies CC/CV transition logic. |
Use Scenario: Providing isolated or non-isolated 5V/12V/15V rails in factory automation PLCs, motor drives, or instrumentation where 24V/28V DC bus is standard. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC regulator converting 24V/28V bus to lower system voltages; handles line transients and load steps with <200mV output deviation. Use Value: Delivers 1A at >95% efficiency with 1.2MHz switching; small DFN package fits tight board spaces; thermal robustness supports convection-cooled enclosures. |
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#TRPBF | Same 16-pin DFN package, 40V/1.5A rating, 2MHz switching, but lacks integrated LDO and PROG-based current programming. | Higher output current and frequency suit compact, high-density designs; unsuitable where precise average current control or internal bias rail is required. | Select when higher peak current or smaller inductors are needed, and external current sensing or bias supply is acceptable. |
| MAX20404ATPA/VY+ | 36V/3A buck-boost with I²C interface, programmable VOUT/IOUT, and built-in telemetry; 20-pin TQFN vs. 16-pin DFN. | Supports digital configuration and fault reporting; larger package and higher cost; not pin-compatible or drop-in. | Select when system-level monitoring, dynamic reconfiguration, or higher current is prioritized over analog simplicity and footprint size. |
Compared with LTC3114EDHC-1#TRPBF, the LTC3115EDHC-1#TRPBF offers higher current and frequency but sacrifices integrated current programming and LDO functionality, while the MAX20404ATPA/VY+ adds digital control at the expense of analog simplicity, pin compatibility, and cost efficiency for fixed-function applications.
Availability
LTC3114EDHC-1#TRPBF is available at Aetrix Electronics and suitable for automotive power systems, high-power LED driver designs, 12V/24V solar panel battery charging systems, and 24V/28V industrial power supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-qualified alternatives.
Supply support for LTC3114EDHC-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The LTC3114-1 belongs to Analog Devices' monolithic buck-boost regulator product line, designed specifically for wide-input, wide-output, constant-current power conversion in space-constrained, thermally demanding applications such as automotive electronics and industrial battery systems.
FAQ
What is the maximum output current capability of the LTC3114EDHC-1#TRPBF in buck mode?
The LTC3114EDHC-1#TRPBF delivers up to 1A output current in buck mode under typical thermal conditions (e.g., 4-layer PCB with exposed PGND pad soldered). At VIN = 3.6V and VOUT = 5V, the maximum continuous output current is 0.5A due to increased conduction losses and thermal constraints. The device includes overtemperature protection and current limiting (1.7A typical inductor limit) to safeguard operation.
How is average output current programmed on the LTC3114EDHC-1#TRPBF?
Average output current on the LTC3114EDHC-1#TRPBF is programmed using a resistor (RPROG) from the PROG pin to GND. The PROG pin sinks current proportional to switch D current at 40µA per ampere. To set 1A average output, use RPROG = 1V / 40µA = 25kΩ, yielding 1V at PROG. Accuracy is ±5% over temperature due to factory trimming of gain and offset.
Does the LTC3114EDHC-1#TRPBF support both Burst Mode and PWM operation?
Yes, the LTC3114EDHC-1#TRPBF supports both modes via the MODE pin: pulling MODE high forces continuous 1.2MHz PWM operation for lowest noise and ripple; pulling MODE low enables Burst Mode, reducing no-load IQ to 30µA (with bootstrapped LDO). The IC automatically transitions from Burst Mode to PWM as load increases, ensuring seamless regulation without output disturbance.
What is the function of the RUN pin on the LTC3114EDHC-1#TRPBF?
The RUN pin on the LTC3114EDHC-1#TRPBF serves dual functions: it acts as an enable/disable input (logic-high enables the IC) and as a precision UVLO threshold control node. With a nominal 1.205V turn-on threshold and 140mV hysteresis, it allows designers to configure custom input voltage turn-on/turn-off points using a resistive divider from VIN, enabling robust power sequencing in automotive and industrial systems.
Is the LTC3114EDHC-1#TRPBF pin-compatible with automotive-grade variants?
Yes, the LTC3114EDHC-1#TRPBF shares identical pinout and footprint with automotive-grade variants such as LTC3114HDHC-1#TRPBF (–40°C to +150°C) and LTC3114MPDHC-1#TRPBF (–55°C to +150°C), all in the same 16-lead 3mm × 5mm DFN package. While the E-grade part is qualified for industrial use, the H- and MP-grade versions meet AEC-Q100 requirements and can be substituted without layout changes.
LTC3114EDHC-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN 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-DFN (5x3)
LTC3114EDHC-1#TRPBF FAQ
1.How can I place an order for LTC3114EDHC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114EDHC-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 LTC3114EDHC-1#TRPBF reliable?
The price and inventory of LTC3114EDHC-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 LTC3114EDHC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3114EDHC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114EDHC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114EDHC-1#TRPBF?
LTC3114EDHC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114EDHC-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 LTC3114EDHC-1#TRPBF?
For technical support, including LTC3114EDHC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114EDHC-1#TRPBF requirements.
6.How does Aetrix verify that LTC3114EDHC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3114EDHC-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 LTC3114EDHC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3114EDHC-1#TRPBF?
All LTC3114EDHC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114EDHC-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 LTC3114EDHC-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3114EDHC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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