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Analog Devices Inc. LTC3307AJV#TRMPBF
- Part No.:
- LTC3307AJV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307AJV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:336
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Product details
Overview
LTC3307AJV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output current, operating from 2.25V–5.5V input and regulating down to 0.5V with ±1% feedback accuracy. It features Silent Switcher® architecture for ultralow EMI, 22ns minimum on-time for fast transient response, and supports forced continuous, pulse-skipping, or Burst Mode® operation-ideal for automotive infotainment power rails and FPGA core supplies.
For engineers reviewing the LTC3307AJV#TRMPBF datasheet, LTC3307AJV#TRMPBF pinout, LTC3307AJV#TRMPBF application, or LTC3307AJV#TRMPBF equivalent, key selection criteria include its AEC-Q100 qualification for automotive use, –40°C to +150°C junction temperature rating, 12-lead 2mm × 2mm LQFN package with exposed PGND pad, and programmable 1MHz–3MHz switching frequency via RT resistor.
Technical Context
The LTC3307AJV#TRMPBF uses constant-frequency peak current mode control with internal compensation, enabling stable regulation without external loop components. Its dual NMOS/PMOS power stage delivers 8mΩ high-side and 31mΩ low-side RDS(ON), supporting high efficiency across load ranges while tolerating inductor saturation during overload events.
It integrates precision enable (400mV threshold), power-good monitoring with 120µs delay and ±1.2%/±2.2% hysteresis, overvoltage protection at 110% VOUT, thermal shutdown at 165°C, and supports clock synchronization to external 1MHz–3MHz sources via MODE/SYNC pin-enabling deterministic timing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and 3.3V/5V system rails without pre-regulation. |
| IOUT Max | 3A continuous - sufficient for FPGA core, microprocessor I/O, or ASIC auxiliary supplies. |
| VOUT Accuracy | ±1% over temperature - ensures tight regulation for voltage-sensitive digital loads. |
| Switching Frequency | Programmable 1MHz to 3MHz - enables compact magnetics and avoids AM band interference. |
| Min On-Time | 22ns - allows high step-down ratios (e.g., 5V→0.5V) at 2MHz without pulse skipping. |
| Thermal Rating | Junction temp up to +150°C - qualified for under-hood automotive applications per AEC-Q100. |
| Quiescent Current | 40µA in Burst Mode sleep - extends battery life in always-on vehicle modules. |
Pinout & Package
The LTC3307AJV#TRMPBF is housed in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed PGND pad (Pin 13), requiring soldering to PCB ground plane for optimal thermal performance (θJA = 51°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Remote sense return for FB; must connect directly to output capacitor negative terminal at load for accurate regulation. |
| EN (Pin 2) | Enable control input | 400mV precision threshold with hysteresis; enables event-driven sequencing with resistor dividers from upstream rails. |
| VIN (Pins 3, 8) | Main power input | Dual pins reduce IR drop and inductance; require local 0201/0402 ceramic bypass to AGND and PGND. |
| PGND (Pins 4, 7, Exposed Pad 13) | Power ground return | Main path for bottom switch current; exposed pad is primary thermal and electrical path-must be vias-connected to large PCB ground plane. |
| SW (Pins 5, 6) | Switch node | Connects to inductor; requires short, wide trace to minimize ringing and EMI in Silent Switcher layout. |
| MODE/SYNC (Pin 9) | Mode selection & sync input | Ground = pulse-skipping; float = forced continuous; VIN = Burst Mode; external clock = synchronized forced continuous. |
| RT (Pin 10) | Frequency programming | Resistor to AGND sets fSW; tied to VIN defaults to 2MHz; ignored when external clock applied to MODE/SYNC. |
| PGOOD (Pin 11) | Power status indicator | Open-drain output pulled low if VOUT < 98% or > 110% nominal, or during EN low/VIN UVLO/thermal fault. |
| FB (Pin 12) | Feedback input | Regulates to 0.5V; connects to resistor divider from VOUT to AGND; phase-lead cap optional for transient optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Minimizes EMI emissions through balanced SW node layout and integrated input capacitors-reduces need for shielding or filtering in automotive EMC-critical zones. |
| Burst Mode® operation | Delivers 40µA quiescent current at light loads while maintaining low output ripple-ideal for always-on telematics modules with strict standby power budgets. |
| 100% duty cycle capability | Enables dropout operation down to VIN ≈ VOUT, supporting brownout resilience in 12V automotive systems with wide input transients. |
| AEC-Q100 Grade J qualification | Guaranteed operation from –40°C to +150°C junction temperature-validated for engine control units, ADAS sensors, and infotainment head units. |
| Internal compensation | Eliminates external compensation network, reducing BOM count and layout sensitivity-accelerates design-in for space-constrained automotive PCBs. |
Applications
| Automotive Infotainment Power | FPGA Core Supply |
|---|---|
Use Scenario: Powering SoC and display interface ICs in head unit systems subject to cold crank (4.5V) and load dump (18V) transients. IC Role / Device Role / Timing Role: Primary 1.2V/3A buck regulator with fast transient response and AEC-Q100 qualification. Use Value: Maintains regulation during 10A/μs load steps with <50mV droop; Silent Switcher® meets CISPR 25 Class 5 radiated emissions limits without ferrite beads. | Use Scenario: Delivering tightly regulated 0.85V core voltage to Xilinx Zynq UltraScale+ MPSoC in autonomous driving compute modules. IC Role / Device Role / Timing Role: High-accuracy, low-noise POL converter with ±1% VOUT tolerance and 22ns min on-time. Use Value: Enables reliable startup and dynamic voltage scaling; internal compensation eliminates tuning effort for varying FPGA load profiles. |
| Optical Networking Line Card | Battery-Powered Industrial Sensor Node |
Use Scenario: Generating 3.3V/2A supply for SFP+ transceivers and SerDes PHYs in telecom line cards with strict thermal constraints. IC Role / Device Role / Timing Role: Compact, high-efficiency step-down regulator with programmable 2MHz switching and forced continuous mode. Use Value: Achieves >92% efficiency at full load with 2mm × 2mm footprint; thermal resistance (θJB = 12°C/W) enables convection-only cooling in dense card layouts. | Use Scenario: Powering ARM Cortex-M7 MCU, LoRa transceiver, and analog front-end in remote condition-monitoring nodes powered by Li-SOCl₂ cells. IC Role / Device Role / Timing Role: Low-IQ buck converter supporting multi-year battery life via Burst Mode® sleep. Use Value: Draws only 40µA in sleep state while maintaining 0.5V output accuracy-extends 2.5Ah cell life to >10 years at 10µA average system load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6286418RTER | 4A output, 2.5V–5.5V input, 0.6V–3.3V output, 1.8MHz fixed fSW, no SYNC pin, smaller 1.5mm × 2.0mm QFN | Lacks AEC-Q100 qualification and Silent Switcher EMI performance; better suited for consumer portable devices than automotive. | Select when higher current (4A) and smaller footprint are prioritized over automotive qualification and ultra-low EMI. |
| MAX20404ATCA/VY+ | 3A output, 2.5V–5.5V input, 0.5V–3.8V output, 2.2MHz fixed fSW, integrated inductor option available | No programmable frequency or external SYNC; integrated inductor simplifies layout but increases height and cost. | Select when board space is constrained and inductor integration outweighs need for frequency tuning or EMI optimization. |
Compared with TPS6286418RTER and MAX20404ATCA/VY+, the LTC3307AJV#TRMPBF uniquely combines AEC-Q100 Grade J qualification, Silent Switcher® EMI reduction, and 1MHz–3MHz programmability-making it the only choice for automotive-grade, high-density, low-emission POL designs requiring long-term reliability at 150°C junction temperature.
Availability
LTC3307AJV#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment, FPGA core supplies, optical networking line cards, and battery-powered industrial sensor nodes requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for LTC3307AJV#TRMPBF 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 LTC3307A product line delivers ultra-compact, high-efficiency, low-EMI DC/DC converters for space- and noise-sensitive applications-including automotive ADAS, 5G infrastructure, and portable medical devices-where reliability across extreme temperatures is mandatory.
FAQ
What is the maximum junction temperature rating for the LTC3307AJV#TRMPBF?
The LTC3307AJV#TRMPBF is rated for operation up to +150°C junction temperature and is AEC-Q100 qualified for automotive applications. This Grade J rating ensures guaranteed performance and reliability in under-hood environments where ambient temperatures exceed 105°C, provided thermal design maintains TJ ≤ 150°C using the specified θJA = 51°C/W and proper PCB copper area/via count under the exposed PGND pad.
Does the LTC3307AJV#TRMPBF support external clock synchronization?
Yes, the LTC3307AJV#TRMPBF supports external clock synchronization via the MODE/SYNC pin. When driven with a 1MHz–3MHz square wave, the internal PLL locks to the external source and forces operation in continuous conduction mode. The slope compensation automatically adapts to the incoming frequency, ensuring stable current-mode control without manual recalibration.
How does the LTC3307AJV#TRMPBF achieve ultralow EMI emissions?
The LTC3307AJV#TRMPBF achieves ultralow EMI through its patented Silent Switcher® architecture, which employs symmetrical, opposite-phase SW node routing and integrated input capacitors to cancel magnetic fields. Layout guidelines require matching SW trace lengths and tight coupling to PGND-enabling compliance with CISPR 25 Class 5 radiated emissions limits without additional shielding or ferrite components.
What are the key differences between the LTC3307AJV#TRMPBF and the LTC3307AIV#TRMPBF?
The LTC3307AJV#TRMPBF and LTC3307AIV#TRMPBF share identical electrical specifications and pinout, but differ in temperature qualification: the "J" grade is rated for –40°C to +150°C junction temperature and AEC-Q100 qualified, while the "I" grade is rated for –40°C to +125°C and intended for industrial applications. Both use the same 2mm × 2mm LQFN package and support identical modes and features.
Can the LTC3307AJV#TRMPBF operate with 100% duty cycle?
Yes, the LTC3307AJV#TRMPBF supports up to 100% duty cycle operation, allowing it to maintain regulation as the input voltage approaches the output voltage-critical for automotive cold-crank scenarios where VIN may dip to 4.5V while powering a 3.3V rail. This dropout capability is enabled by the adaptive gate drive and low-RDS(ON) power switches (8mΩ high-side, 31mΩ low-side).
LTC3307AJV#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®1
- Package/Case:
- 12-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3307AJV#TRMPBF FAQ
1.How can I place an order for LTC3307AJV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307AJV#TRMPBF 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 LTC3307AJV#TRMPBF reliable?
The price and inventory of LTC3307AJV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307AJV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3307AJV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307AJV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307AJV#TRMPBF?
LTC3307AJV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307AJV#TRMPBF 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 LTC3307AJV#TRMPBF?
For technical support, including LTC3307AJV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307AJV#TRMPBF requirements.
6.How does Aetrix verify that LTC3307AJV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307AJV#TRMPBF 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 LTC3307AJV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3307AJV#TRMPBF?
All LTC3307AJV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307AJV#TRMPBF, 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 LTC3307AJV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3307AJV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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