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Analog Devices Inc. LTC3114MPFE-1#TRPBF
- Part No.:
- LTC3114MPFE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3114MPFE-1#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,833
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Product details
Overview
LTC3114MPFE-1#TRPBF 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 LTC3114MPFE-1#TRPBF datasheet, LTC3114MPFE-1#TRPBF pinout, LTC3114MPFE-1#TRPBF application, or LTC3114MPFE-1#TRPBF equivalent, this device supports seamless buck/boost transitions, accurate RUN-pin UVLO programming, integrated 4-switch topology, and wide-temperature operation (–55°C to 150°C) in TSSOP package - critical for industrial battery charging and high-reliability LED driver designs.
Technical Context
The LTC3114MPFE-1#TRPBF implements proprietary current-mode buck-boost control with four internal N-channel DMOS switches (RDS(ON) = 250mΩ each), enabling regulation when VIN is above, below, or equal to VOUT. Its 1.2MHz fixed-frequency oscillator ensures low EMI and compact magnetics.
It integrates an internal 4.4V LDO (PLDO/LDO pins) for gate driver supply and control circuitry, with programmable average output current via PROG pin (40µA/A gain, ±5% accuracy). Thermal shutdown, short-circuit protection, and soft-start are embedded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 40V - supports 12V/24V/28V industrial and automotive rails without external pre-regulation |
| Output Voltage Range | 2.7V to 40V - programmable via FB divider; enables single-inductor conversion across wide VIN/VOUT ratios |
| Max Output Current | 1A in buck mode - sufficient for high-power LED strings or 12V-to-5V/3.3V system rails |
| Switching Frequency | 1.2MHz nominal - allows use of small 6.8µH inductors and reduces solution footprint |
| Quiescent Current | 30µA in Burst Mode (bootstrapped) - extends battery life in always-on automotive modules |
| Operating Temp Range | –55°C to 150°C junction - qualified for under-hood automotive and harsh industrial environments |
| Efficiency | Up to 96% - minimizes thermal stress in enclosed enclosures and improves power density |
Pinout & Package
Package: 16-lead plastic TSSOP (FE), 5mm × 4.4mm × 1.2mm, exposed PGND pad (Pin 17) soldered to PCB ground plane for thermal performance (θJA = 38°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 for rated thermal performance |
| SW2 (2) | Buck-Boost Switch Node | Connects to one end of inductor; drives output-side switching in boost/buck modes |
| PVOUT (3) | Power Output | High-current output rail; requires ≥10µF low-ESR capacitor with short PGND return path |
| RUN (4) | Enable & UVLO Control | Accurate 1.205V turn-on threshold with 140mV hysteresis - enables custom input undervoltage lockout |
| PROG (5) | Current Sense Output | Delivers 40µA per amp of SWD current - used to program average output current with resistor to GND |
| VC (6) | Error Amplifier Output | Compensation node requiring external RC network (CP1/CP2/RZ) for loop stability |
| FB (7) | Voltage Feedback Input | 1.0V reference; sets VOUT via resistive divider (VOUT = 1V × (1 + RTOP/RBOT)) |
| GND (8) | Signal Ground | Reference for control circuitry; must be isolated from noisy power ground paths |
| LDO / PLDO (9, 11) | Internal LDO Supply | 4.4V regulated output powering gate drivers and analog core; pins must be tied together externally |
| VIN / PVIN (10, 14) | Input Power & Buck-Boost Rail | VIN powers internal LDO; PVIN supplies power switches - both must be connected and bypassed |
| BST2 / BST1 (12, 13) | Flying Capacitor Connections | Drive gate drivers for SW2/SW1 via 68nF capacitors; traces must be short and low-inductance |
| SW1 (15) | Buck-Boost Switch Node | Connects to other end of inductor; drives input-side switching in buck/boost modes |
| MODE (16) | Operation Mode Select | High = forced PWM (1.2MHz); Low = Burst Mode - auto-transitions to PWM at higher loads |
Key Features
| Feature | Design Value |
|---|---|
| Four-switch synchronous buck-boost topology | Eliminates need for external diodes or complex controller+MOSFET combinations; enables bidirectional voltage regulation |
| Programmable average output current | ±5% accuracy over temperature via PROG pin - replaces external current-sense ICs in LED drivers and battery chargers |
| AEC-Q100 qualified (MP grade) | Validated for automotive under-hood applications including start-stop systems and infotainment power supplies |
| 1.2MHz ultralow-noise PWM | Reduces EMI filter size and cost; avoids AM radio band while maintaining high efficiency |
| Integrated 4.4V LDO with PLDO/LDO tie | Self-powered gate drivers and analog core - removes need for external bias supply in isolated systems |
| Burst Mode® with 30µA no-load IQ | Extends runtime in battery-backed systems (e.g., telematics, ADAS sensors) without sacrificing transient response |
Applications
| Automotive Power Systems | 12V/24V Solar Panel Battery Charging |
|---|---|
Use Scenario: Regulating variable solar panel output (18–40V) to charge 12V lead-acid or LiFePO4 batteries in off-grid vehicles. IC Role / Device Role / Timing Role: Synchronous buck-boost regulator with programmable constant-current/constant-voltage charging profile. Use Value: Maintains >90% efficiency across full solar MPPT range; PROG pin enables precise CC/CV transition without microcontroller intervention. |
Use Scenario: Converting unregulated 12V vehicle battery to stable 5V/3.3V for infotainment head units during cold cranking (down to 3.6V). IC Role / Device Role / Timing Role: Wide-input buck-boost DC/DC converter with seamless mode transition and low-noise PWM. Use Value: Delivers regulated output even at 2.2V input; 1.2MHz switching avoids interference with CAN bus and audio subsystems. |
| High-Power LED Driver | 24V Industrial Power Supply |
Use Scenario: Driving multi-string high-brightness LEDs (e.g., headlights, signage) from 24V truck or rail systems. IC Role / Device Role / Timing Role: Constant-current source with programmable average output current and thermal foldback. Use Value: PROG-based current setting achieves ±5% LED brightness uniformity; integrated OVP/OCP protects against open/shorted strings. |
Use Scenario: Providing isolated 24V-to-12V/5V conversion for PLC I/O modules in factory automation cabinets. IC Role / Device Role / Timing Role: Primary non-isolated buck-boost regulator supporting wide input transients (e.g., 18–36V). Use Value: –55°C to 150°C operation ensures reliability in uncooled enclosures; 96% peak efficiency reduces heat sink requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3115EDHC-1#TRPBF | Same architecture but DFN package (3×5mm); lower θJA (43°C/W); –40°C to 125°C rating | Preferred for space-constrained PCBs where thermal mass is available; not rated for extended automotive temp range | Select if board area is critical and ambient temperature stays ≤125°C |
| MAX20404ATPA/VY+ | 3.5V–36V input; 4A output; 2.2MHz switching; no programmable current limit; different pinout | Higher current, faster switching - suited for high-density computing power rails, not precision current regulation | Select only when >1A output and smaller inductors are required; not drop-in compatible |
Compared with LTC3115EDHC-1#TRPBF and MAX20404ATPA/VY+, the LTC3114MPFE-1#TRPBF uniquely combines automotive-grade temperature range, accurate programmable current limiting, and seamless buck-boost operation in a through-hole-compatible TSSOP - making it optimal for safety-critical, thermally demanding, and current-regulated applications.
Availability
LTC3114MPFE-1#TRPBF is available at Aetrix Electronics and suitable for automotive power systems, 12V/24V solar battery charging, high-power LED drivers, and 24V industrial power supplies requiring stable component supply across extended temperature ranges.
Supply support for LTC3114MPFE-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, Inc. 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 converters with programmable current regulation and AEC-Q100 qualification - designed specifically for automotive and harsh-environment power management where reliability, precision, and thermal resilience are mandatory.
FAQ
What is the maximum junction temperature specification for LTC3114MPFE-1#TRPBF?
The LTC3114MPFE-1#TRPBF is specified for operation from –55°C to 150°C junction temperature. This MP-grade part meets AEC-Q100 requirements for automotive under-hood applications and includes integrated overtemperature protection that disables switching above rated TJ. The TSSOP package has θJA = 38°C/W on standard 4-layer boards, enabling reliable operation in sealed enclosures up to 105°C ambient with appropriate layout.
How is average output current programmed on LTC3114MPFE-1#TRPBF?
Average output current on the LTC3114MPFE-1#TRPBF is programmed using a resistor from PROG (Pin 5) to GND. The PROG pin delivers a current proportional to switch-D current at 40µA per amp (IPROG = ISWD/25,000), so RPROG = 1V / IOUT × 25,000 yields 1V at PROG for the desired IOUT. For example, 500mA output uses a 50kΩ resistor. Factory trimming ensures ±5% accuracy across temperature.
Does LTC3114MPFE-1#TRPBF support seamless transitions between buck and boost modes?
Yes, the LTC3114MPFE-1#TRPBF uses a proprietary four-switch buck-boost control algorithm that enables fully seamless transitions between buck, boost, and buck-boost modes - with no output voltage glitches, subharmonic switching, or discontinuities in inductor current. This is confirmed in typical performance graphs (Figures G28–G31) and block diagram analysis, making it ideal for noise-sensitive automotive and industrial applications.
What is the purpose of the LDO and PLDO pins on LTC3114MPFE-1#TRPBF?
The LDO (Pin 9) and PLDO (Pin 11) pins on the LTC3114MPFE-1#TRPBF form an integrated 4.4V linear regulator: PLDO is the output, LDO is the input reference. They must be tied together externally and bypassed with ≥4.7µF capacitance. This internal LDO powers the analog control circuitry and gate drivers, eliminating the need for an external bias supply and simplifying system architecture - especially in isolated or battery-fed designs.
Can LTC3114MPFE-1#TRPBF operate with input voltage below 2.7V?
Yes, the LTC3114MPFE-1#TRPBF operates down to 2.2V input voltage, as specified in Absolute Maximum Ratings and Electrical Characteristics. However, output voltage regulation below 2.7V requires disabling the accurate programmable current limit feature (per Note 5), since the PROG circuitry relies on minimum LDO headroom. For 1.0V–2.6V VOUT, the device remains functional but loses ±5% current accuracy.
LTC3114MPFE-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
LTC3114MPFE-1#TRPBF FAQ
1.How can I place an order for LTC3114MPFE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3114MPFE-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 LTC3114MPFE-1#TRPBF reliable?
The price and inventory of LTC3114MPFE-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 LTC3114MPFE-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3114MPFE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3114MPFE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3114MPFE-1#TRPBF?
LTC3114MPFE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3114MPFE-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 LTC3114MPFE-1#TRPBF?
For technical support, including LTC3114MPFE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3114MPFE-1#TRPBF requirements.
6.How does Aetrix verify that LTC3114MPFE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3114MPFE-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 LTC3114MPFE-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3114MPFE-1#TRPBF?
All LTC3114MPFE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3114MPFE-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 LTC3114MPFE-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3114MPFE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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