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Analog Devices Inc. LTC3114HDHC-1#TRPBF
- Part No.:
- LTC3114HDHC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3114HDHC-1#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,047
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Product details
Overview
LTC3114HDHC-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 up to 150°C junction temperature in a thermally enhanced 16-lead 3mm × 5mm DFN package. It is used in 24V industrial power supplies and solar battery charging systems.
For engineers reviewing the LTC3114HDHC-1#TRPBF datasheet, LTC3114HDHC-1#TRPBF pinout, LTC3114HDHC-1#TRPBF application, or LTC3114HDHC-1#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world application mappings - all specific to the H-grade DFN variant with AEC-Q100 qualification.
Technical Context
The LTC3114HDHC-1#TRPBF implements a proprietary four-switch synchronous buck-boost topology with integrated N-channel DMOS power switches (250mΩ RDS(ON) each) and internal gate drivers powered by BST1/BST2 flying capacitors. Its current-mode PWM control loop ensures stable regulation across input voltages from 2.2V to 40V and output voltages from 2.7V to 40V, with seamless mode transitions and no subharmonic oscillation.
It features dual operating modes: Burst Mode® (30µA no-load IQ) for light-load efficiency and forced PWM mode (1.2MHz ±200kHz) for low-noise performance. The RUN pin provides accurate UVLO threshold (1.205V typ, 140mV hysteresis), while PROG enables precise average output current programming (±5% accuracy) via external resistor, independent of buck/boost mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports wide-range industrial, automotive, and solar 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/24V system rails |
| Switching Frequency | 1.2MHz nominal - enables compact magnetics and EMI filtering with minimal board area |
| Efficiency | Up to 96% - achieved via synchronous rectification and low-RDS(ON) internal MOSFETs |
| Junction Temperature Range | –40°C to +150°C - qualified per AEC-Q100 for under-hood automotive and harsh industrial environments |
| No-Load Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on systems |
Pinout & Package
Package: 16-lead 3mm × 5mm × 0.75mm plastic DFN (DHC) with exposed PGND pad (Pin 17), rated θJA = 43°C/W (4-layer board), θJC = 4°C/W. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1, Exposed Pad Pin 17) | Power Ground Reference | Main return path for high-current switch nodes SW1/SW2 and internal LDO; exposed pad is mandatory for thermal derating |
| 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 |
| PVOUT (Pin 3) | Power Output Supply Rail | High-current output node requiring ≥10µF low-ESR capacitor placed adjacent to IC with short PGND return |
| RUN (Pin 4) | Enable / UVLO Control Input | Accurate 1.205V threshold with 140mV hysteresis; enables custom turn-on/off voltage setpoints via resistive divider |
| PROG (Pin 5) | Average Output Current Sense Output | Delivers 40µA/A proportional current for external resistor-based programming of IOUT(AVG) with ±5% accuracy |
| VC (Pin 6) | Error Amplifier Compensation Node | Requires external RC network (RZ, CP1, CP2) to stabilize voltage loop; directly drives PWM comparator |
| FB (Pin 7) | Output Voltage Feedback Input | 1.0V nominal reference; sets VOUT via resistor divider (VOUT = 1V × (1 + RTOP/RBOT)) |
| GND (Pin 8) | Signal Ground Reference | Low-noise analog ground for control circuitry; must be isolated from PGND at single-point star connection |
| LDO / PLDO (Pins 9 & 11) | Internal LDO Input/Output | 4.4V internal LDO rail; pins must be tied together and bypassed with ≥4.7µF capacitor to GND |
| VIN / PVIN (Pins 10 & 14) | Input Power Supply Nodes | VIN powers internal bias; PVIN supplies power switches; both must be connected and bypassed with ≥10µF capacitor |
| BST1 / BST2 (Pins 12 & 13) | Flying Capacitor Driver Rails | Require 68nF ceramic capacitors to SW1/SW2 respectively; critical for gate drive voltage integrity |
| SW1 (Pin 15) | Buck-Boost Inductor Node | Second inductor connection point; complements SW2 to form 4-switch buck-boost power stage |
| MODE (Pin 16) | Operating Mode Select | Logic-high forces continuous PWM; logic-low enables Burst Mode; auto-transitions to PWM at high load |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous buck-boost topology | Enables single-inductor regulation across VIN > VOUT, VIN < VOUT, and VIN ≈ VOUT with zero-crossing continuity |
| Programmable average output current | Set via single resistor on PROG pin with ±5% accuracy over temperature and line/load conditions |
| 1.2MHz fixed-frequency PWM with Burst Mode | Reduces EMI in noise-sensitive applications while maintaining 30µA no-load IQ in Burst Mode |
| AEC-Q100 qualified H-grade operation | Guaranteed performance from –40°C to +150°C junction temperature for automotive and industrial reliability |
| Integrated 4.4V LDO with PLDO supply rail | Provides clean, regulated bias for gate drivers and control circuitry; eliminates need for external LDO |
| Accurate RUN pin UVLO with hysteresis | Enables precise system-level brown-in/brown-out protection without external comparators or hysteresis networks |
Applications
| 24V Industrial Power Supply | 12V Lead-Acid to 12V Regulator |
|---|---|
Use Scenario: Stable 12V rail generation from variable 18V–32V industrial bus with wide input tolerance and high efficiency. IC Role / Device Role / Timing Role: Primary buck-boost regulator managing dynamic input transients and load steps while maintaining tight VOUT regulation. Use Value: Eliminates need for separate pre-regulator stages; achieves >94% efficiency at 500mA load across full input range. |
Use Scenario: Regulating 12V battery output to stable 12V system rail despite battery voltage sagging to 10.5V during cranking. IC Role / Device Role / Timing Role: Seamless buck-boost controller that maintains regulation as battery voltage crosses VOUT threshold. Use Value: Prevents system reset during cold-cranking events; supports continuous operation down to 10.5V input. |
| High-Power LED Driver | 12V/24V Solar Panel Battery Charging |
Use Scenario: Constant-current driving of multi-string white LEDs in outdoor signage with 24V input and 36V LED string requirement. IC Role / Device Role / Timing Role: Programmable current source with precision average output current control via PROG pin. Use Value: Delivers ±5% current accuracy across temperature; enables single-resistor dimming and thermal foldback integration. |
Use Scenario: MPPT-compatible charging of 12V/24V lead-acid or LiFePO4 batteries from solar panels with open-circuit voltage up to 40V. IC Role / Device Role / Timing Role: Wide-input buck-boost charger with programmable constant-current/constant-voltage profile. Use Value: Maximizes energy harvest across varying irradiance; supports battery voltage ranges from 10V to 29V without topology change. |
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 4-switch architecture but 5V max VOUT; lower 36V VIN rating; no PROG current programming | Suitable only for fixed 5V output applications; lacks programmable current limit for LED/battery use cases | Select only when output is fixed ≤5V and current limiting is handled externally |
| MP2918GQ-Z | 3.5A peak current, 36V VIN, no integrated LDO, requires external gate drivers, no PROG pin | Higher current capability but no programmable average current or AEC-Q100 qualification | Prefer for cost-sensitive, non-automotive 3A applications where external sensing is acceptable |
Compared with LTC3115EDHC-1#TRPBF and MP2918GQ-Z, the LTC3114HDHC-1#TRPBF uniquely combines AEC-Q100 qualification, 40V input, 40V output, and precision programmable average current - making it the only option among the three for automotive battery charging and high-voltage LED driver designs requiring guaranteed 150°C operation.
Availability
LTC3114HDHC-1#TRPBF is available at Aetrix Electronics and suitable for 24V industrial power supplies, automotive battery charging systems, and high-power LED driver designs requiring stable component supply with long-term lifecycle support.
Supply support for LTC3114HDHC-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.
The LTC3114-1 product line delivers wide-input, programmable-current buck-boost regulators designed for automotive infotainment, ADAS power rails, and industrial equipment where input voltage varies widely and precise current control is required.
FAQ
What is the maximum junction temperature specification for the LTC3114HDHC-1#TRPBF?
The LTC3114HDHC-1#TRPBF is rated for operation from –40°C to +150°C junction temperature and is AEC-Q100 qualified for automotive applications. This H-grade rating is confirmed in the Absolute Maximum Ratings table and applies specifically to the DHC package variant with exposed PGND pad properly soldered to the PCB thermal plane. The LTC3114HDHC-1#TRPBF maintains full electrical specifications across this range.
Does the LTC3114HDHC-1#TRPBF support true buck-boost operation with seamless mode transition?
Yes, the LTC3114HDHC-1#TRPBF uses a proprietary four-switch synchronous buck-boost topology that regulates VOUT continuously as VIN crosses VOUT, with no discontinuity in inductor current or output voltage. This is confirmed in the Block Diagram, Operation section, and Typical Application schematic - distinguishing it from two-switch or SEPIC-based alternatives that exhibit voltage droop or instability at the crossover point.
How is average output current programmed on the LTC3114HDHC-1#TRPBF?
Average output current is programmed on the LTC3114HDHC-1#TRPBF using a single resistor from PROG (Pin 5) to GND. The PROG pin delivers 40µA per ampere of desired average output current, so RPROG = 1V / (IOUT(AVG) × 40µA/A). For example, 500mA requires 50kΩ. This method is specified in the Electrical Characteristics table and Applications Information section, with ±5% accuracy over temperature and line conditions.
What is the purpose of the BST1 and BST2 pins on the LTC3114HDHC-1#TRPBF?
BST1 and BST2 are flying capacitor driver rails for the internal gate drivers of switches A and D, respectively. Each requires a 68nF ceramic capacitor connected between the BST pin and its corresponding switch node (BST1→SW1, BST2→SW2). These capacitors generate boosted gate drive voltages to fully enhance the N-channel MOSFETs - a requirement explicitly stated in the Pin Functions section and confirmed in Figure 1's power stage schematic.
Is the LTC3114HDHC-1#TRPBF pin-compatible with other variants in the LTC3114-1 family?
Yes, the LTC3114HDHC-1#TRPBF shares identical pinout, footprint, and electrical interface with all DFN-package variants (E, I, H, MP grades) of the LTC3114-1 family, including LTC3114EDHC-1#TRPBF and LTC3114IDHC-1#TRPBF. This is confirmed in the Pin Configuration diagrams and Order Information tables, where all DHC variants list identical 16-lead DFN mechanical dimensions and pin numbering.
LTC3114HDHC-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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3114HDHC-1#TRPBF FAQ
1.How can I place an order for LTC3114HDHC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114HDHC-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 LTC3114HDHC-1#TRPBF reliable?
The price and inventory of LTC3114HDHC-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 LTC3114HDHC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3114HDHC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114HDHC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114HDHC-1#TRPBF?
LTC3114HDHC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114HDHC-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 LTC3114HDHC-1#TRPBF?
For technical support, including LTC3114HDHC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114HDHC-1#TRPBF requirements.
6.How does Aetrix verify that LTC3114HDHC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3114HDHC-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 LTC3114HDHC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3114HDHC-1#TRPBF?
All LTC3114HDHC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114HDHC-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 LTC3114HDHC-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3114HDHC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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