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Analog Devices Inc. LTC3307AJV#TRPBF
- Part No.:
- LTC3307AJV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307AJV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,493
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Product details
Overview
LTC3307AJV#TRPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output current, operating from 2.25V to 5.5V input, regulating down to 0.5V with ±1% feedback accuracy, and featuring Silent Switcher® architecture for ultralow EMI in automotive-grade 2mm × 2mm LQFN package.
For engineers reviewing the LTC3307AJV#TRPBF datasheet, LTC3307AJV#TRPBF pinout, LTC3307AJV#TRPBF application, or LTC3307AJV#TRPBF equivalent, key selection criteria include its –40°C to +150°C junction temperature rating, 22ns minimum on-time, programmable 1MHz–3MHz switching frequency, and support for forced continuous, pulse-skipping, or Burst Mode® operation.
Technical Context
The LTC3307AJV#TRPBF uses constant-frequency peak current mode control with internal compensation and supports three operating modes-forced continuous, pulse-skipping, and low-ripple Burst Mode-selected via the MODE/SYNC pin. Its Silent Switcher® architecture employs symmetrical layout and integrated input capacitors to suppress common-mode EMI.
It integrates 31mΩ PMOS and 8mΩ NMOS power switches, delivers up to 100% duty cycle for low-dropout operation, and includes precision enable (400mV threshold), power good monitoring with 120µs delay, and overvoltage/overcurrent/thermal protection. The RT pin sets switching frequency via external resistor or accepts external clock synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables core supply for modern FPGAs, ASICs, and microprocessors requiring sub-1V rails. |
| Output Accuracy | ±1% over temperature - ensures stable voltage regulation across automotive thermal extremes (–40°C to +150°C). |
| Switching Frequency | 1MHz to 3MHz (programmable) - allows optimization of size vs. efficiency; 2MHz default enables compact 470nH inductor use. |
| Min On-Time | 22ns - enables high step-down ratios (e.g., 5.5V→0.5V at 2MHz) without pulse skipping at light loads. |
| Top/Bottom RDS(ON) | 31mΩ / 8mΩ - reduces conduction loss and improves full-load efficiency in thermally constrained LQFN package. |
| IQ in Burst Mode | 40µA - extends battery life in always-on systems while maintaining low output ripple. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed PGND pad (Pin 13) for low thermal resistance (θJA = 51°C/W). Designed for automotive AEC-Q100 compliance and high-power density PCB layouts.
| 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 to reject PCB IR drop. |
| EN (Pin 2) | Enable control input | 400mV precision threshold with hysteresis; supports power-up sequencing via resistor divider from upstream rail. |
| VIN (Pins 3, 8) | Main power input | Dual pins reduce trace inductance; require local 1µF 0201 ceramic bypass to AGND and PGND. |
| PGND (Pins 4, 7, Exposed Pad 13) | Power ground return | Main thermal and electrical path; exposed pad must be soldered to large PCB ground plane with ≥6 vias. |
| SW (Pins 5, 6) | Switch node | High dv/dt node connecting to inductor; requires short, wide copper pour to minimize EMI and ringing. |
| 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 (1–3MHz); open or tied to VIN selects default 2MHz oscillator. |
| PGOOD (Pin 11) | Power status indicator | Open-drain output pulled low if VOUT < 97% or > 110% of setpoint, or during EN low/VIN UVLO/thermal shutdown. |
| FB (Pin 12) | Feedback input | Regulates to 500mV; connects to resistor divider from VOUT; phase-lead cap between FB–VOUT improves transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Reduces radiated EMI by >20dB vs. conventional buck converters, eliminating need for metal shielding in space-constrained automotive modules. |
| Three Operating Modes | Selectable via single MODE/SYNC pin: Burst Mode (40µA IQ), pulse-skipping (low noise), or forced continuous (fixed-frequency, minimal ripple). |
| Automotive Temperature Grade | J-grade (–40°C to +150°C junction) qualified per AEC-Q100, enabling use in engine control units, ADAS cameras, and under-hood power supplies. |
| Robust Protection Suite | Includes output overvoltage lockout (>110%), valley current limit (3.9A), thermal shutdown (165°C), and safe handling of inductor saturation during overload. |
| Internal Compensation | Eliminates external compensation components, reducing BOM count and layout sensitivity while maintaining stability across 0.5V–5.5V VOUT range. |
Applications
| Automotive ADAS Camera Power Supply | FPGA Core Voltage Regulator |
|---|---|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view camera modules mounted near engine bay. IC Role / Device Role / Timing Role: Primary 1.2V/3A POL regulator with fast load transient response and EMI immunity in noisy automotive environment. Use Value: J-grade thermal rating ensures reliability at 150°C junction; Silent Switcher® meets CISPR-25 Class 5 radiated emissions limits without shielding. |
Use Scenario: Supplies configurable logic core voltage (e.g., 0.85V–1.2V) for Xilinx Zynq or Intel Cyclone FPGA in industrial PLC or edge AI gateway. IC Role / Device Role / Timing Role: High-accuracy, low-noise step-down converter with remote sensing to maintain tight voltage tolerance under dynamic logic switching. Use Value: ±1% VFB accuracy and 22ns min on-time enable stable sub-1V rail generation; forced continuous mode minimizes output ripple during bursty compute loads. |
| Optical Networking SFP+ Module | Portable Medical Imaging Sensor |
Use Scenario: Generates 3.3V or 1.8V bias for laser driver and transimpedance amplifier in pluggable optical transceivers. IC Role / Device Role / Timing Role: Compact, low-EMI DC/DC converter sharing board space with high-speed serial interfaces (SFI, I2C). Use Value: 2mm × 2mm LQFN footprint saves critical real estate; programmable 1–3MHz switching avoids interference with 10Gbps data lanes. |
Use Scenario: Powers CMOS image sensor and analog front-end in handheld ultrasound or dermatology scanner with battery backup. IC Role / Device Role / Timing Role: Efficient, low-quiescent-current regulator supporting both active imaging (3A peak) and standby (40µA IQ) modes. Use Value: Burst Mode IQ of 40µA extends battery runtime; soft-start prevents inrush into sensitive analog circuitry during power-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62864DLCR | 3A, 2.5V–5.5V input, 0.6V–3.3V output, 1.8MHz fixed frequency, 11mΩ/15mΩ FETs, no Burst Mode, QFN-12 (2mm×2mm) | Lacks Burst Mode and Silent Switcher EMI suppression; lower RDS(ON) but no automotive temp grade | Prefer LTC3307AJV#TRPBF for automotive or EMI-sensitive designs; TPS62864DLCR suits cost-sensitive industrial apps needing only fixed-frequency operation. |
| MP2143GJ-Z | 3A, 2.5V–5.5V input, 0.6V–5.5V output, 1.5MHz–3.5MHz programmable, 25mΩ/50mΩ FETs, no integrated EMI reduction, QFN-10 (2mm×2mm) | Higher RDS(ON), no AEC-Q100 qualification, no Silent Switcher, smaller package but fewer pins (no RT, no AGND) | LTC3307AJV#TRPBF offers superior thermal performance, EMI control, and automotive reliability; MP2143GJ-Z may suit non-automotive consumer apps with tighter cost targets. |
Compared with TPS62864DLCR and MP2143GJ-Z, the LTC3307AJV#TRPBF uniquely combines AEC-Q100 J-grade operation, Silent Switcher® EMI suppression, and selectable operating modes - making it the only choice for high-reliability, noise-sensitive automotive and optical networking power rails.
Availability
LTC3307AJV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS, FPGA core supplies, optical transceiver modules, and portable medical imaging systems requiring stable component supply across extended temperature ranges.
Supply support for LTC3307AJV#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 LTC3307A product line delivers ultra-compact, low-EMI synchronous buck regulators for space- and noise-constrained applications including automotive camera modules, optical networking, and portable instrumentation.
FAQ
What is the maximum junction temperature rating for the LTC3307AJV#TRPBF?
The LTC3307AJV#TRPBF is rated for operation up to +150°C junction temperature and is guaranteed over the –40°C to +150°C range, meeting AEC-Q100 requirements for under-hood automotive applications. This J-grade rating distinguishes it from standard I-grade (–40°C to +125°C) variants like LTC3307AIV#TRPBF.
Does the LTC3307AJV#TRPBF support external frequency synchronization?
Yes, the LTC3307AJV#TRPBF supports external clock synchronization via the MODE/SYNC pin. When driven with a 1MHz–3MHz square wave, it locks its switching to the external source while operating in forced continuous mode. Slope compensation automatically adapts to the input frequency, ensuring stable operation without manual tuning.
How does the MODE/SYNC pin configure operating modes on the LTC3307AJV#TRPBF?
The MODE/SYNC pin configures three distinct modes: grounded → pulse-skipping; floated → forced continuous; tied to VIN → Burst Mode®. Each mode optimizes trade-offs among efficiency, noise, and ripple - e.g., Burst Mode delivers 40µA IQ for battery longevity, while forced continuous ensures fixed-frequency, low-ripple performance for sensitive analog circuits.
What is the purpose of the AGND pin on the LTC3307AJV#TRPBF?
The AGND pin on the LTC3307AJV#TRPBF serves as the remote voltage sense return and analog ground reference for the feedback loop. It must connect directly to the output capacitor's negative terminal at the load to reject PCB trace resistance errors, ensuring accurate regulation - especially critical for low-voltage, high-current rails like FPGA cores.
Can the LTC3307AJV#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3307AJV#TRPBF supports up to 100% duty cycle operation, allowing it to maintain regulation as VIN approaches VOUT (e.g., 3.3V input → 3.0V output). This capability eliminates the need for linear post-regulators in low-dropout scenarios, improving system efficiency and thermal performance in battery-powered or intermediate bus applications.
LTC3307AJV#TRPBF 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#TRPBF FAQ
1.How can I place an order for LTC3307AJV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307AJV#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 LTC3307AJV#TRPBF reliable?
The price and inventory of LTC3307AJV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307AJV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3307AJV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307AJV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307AJV#TRPBF?
LTC3307AJV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307AJV#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 LTC3307AJV#TRPBF?
For technical support, including LTC3307AJV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307AJV#TRPBF requirements.
6.How does Aetrix verify that LTC3307AJV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307AJV#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 LTC3307AJV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3307AJV#TRPBF?
All LTC3307AJV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307AJV#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 LTC3307AJV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3307AJV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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