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Analog Devices Inc. LTC3307AIV#TRMPBF
- Part No.:
- LTC3307AIV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307AIV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:518
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Product details
Overview
LTC3307AIV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output at 0.5V–VIN from 2.25V–5.5V input, featuring 22ns minimum on-time, 2MHz default switching frequency, and Silent Switcher® architecture for ultralow EMI. It operates in forced continuous, pulse-skipping, or low-ripple Burst Mode®-ideal for FPGA core supplies and battery-powered systems requiring high efficiency and fast transient response.
For engineers reviewing the LTC3307AIV#TRMPBF datasheet, LTC3307AIV#TRMPBF pinout, LTC3307AIV#TRMPBF application, or LTC3307AIV#TRMPBF equivalent, key selection factors include its 12-lead 2mm × 2mm LQFN package with exposed PGND pad, ±1% VFB accuracy over temperature, 40µA quiescent current in Burst Mode, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC3307AIV#TRMPBF uses constant-frequency peak current mode control with programmable 1MHz–3MHz switching via RT resistor or external SYNC clock. Its architecture supports up to 100% duty cycle for low-dropout operation and integrates forward/reverse inductor current limiting, output overvoltage protection, and thermal shutdown.
It features dual power switches (8mΩ NMOS / 31mΩ PMOS), internal compensation, precision 400mV EN threshold with hysteresis, and PGOOD with 97–99% rising threshold and 120µs delay. The AGND pin serves as remote output voltage sense and analog ground reference, enabling accurate regulation under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and intermediate bus rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables direct regulation of sub-1V FPGA/ASIC cores and I/O supplies. |
| Output Current | 3A continuous - sufficient for high-performance processor cores and SoC power domains. |
| Switching Frequency | 1MHz to 3MHz (programmable) - allows optimization of size vs. efficiency; default 2MHz balances inductor size and EMI. |
| Min On-Time | 22ns - enables high step-down ratios (e.g., 5V→0.6V at 2MHz) with stable operation. |
| VFB Accuracy | ±1% over –40°C to +125°C - ensures tight output regulation across automotive and industrial temperature ranges. |
| IQ (Burst Mode) | 40µA - extends battery life in always-on, low-duty-cycle applications like IoT sensors. |
Pinout & Package
The LTC3307AIV#TRMPBF is housed in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed PGND pad (Pin 13), optimized for low θJA = 51°C/W and efficient PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference & remote output sense | Must connect directly to output capacitor negative terminal at load to reject PCB IR drop and ensure ±1% regulation accuracy. |
| EN (Pin 2) | Enable control with precision threshold | 400mV rising threshold enables precise power-up sequencing; 1µA shutdown current minimizes system standby loss. |
| VIN (Pins 3, 8) | Main input power supply | Dual pins reduce trace inductance and resistive loss; require local 0201/0402 ceramic bypass to AGND and PGND. |
| PGND (Pins 4, 7, Exposed Pad 13) | Power ground return path | Exposed pad is primary thermal and electrical path-must be soldered to large PCB ground plane with ≥6 vias for <12°C/W θJB. |
| SW (Pins 5, 6) | Switch node connection | High dv/dt node; requires short, wide copper pour to inductor to minimize EMI and switching losses. |
| MODE/SYNC (Pin 9) | Operating mode selection & clock sync | Ground = pulse-skipping; float = forced continuous; VIN = Burst Mode; external clock = synchronized forced continuous. |
| RT (Pin 10) | Frequency programming | Resistor to AGND sets fSW from 1–3MHz; open or tied to VIN selects default 2MHz oscillator. |
| PGOOD (Pin 11) | Open-drain power-good indicator | Asserts high-Z when VOUT is within –2%/+10%; pulls low during UVLO, shutdown, or OV fault with 120µs delay. |
| FB (Pin 12) | Feedback voltage sensing | Regulates to 0.5V; connects to resistor divider from VOUT to AGND; phase-lead cap to VOUT improves transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30dB vs. conventional buck converters-enables compliance with CISPR 22 Class B without shielding. |
| Low-ripple Burst Mode® operation | Maintains <10mVPP output ripple at light loads while achieving 40µA IQ, critical for noise-sensitive RF and sensor circuits. |
| 22ns minimum on-time | Supports high step-down ratios (e.g., 5V→0.6V @ 2MHz) without pulse skipping, ensuring stable regulation in POL applications. |
| Integrated 8mΩ NMOS / 31mΩ PMOS switches | Enables >90% efficiency at 3A/1.2V with minimal external components-reduces BOM count and board area. |
| AEC-Q100 qualified (Grade I) | Rated for –40°C to +125°C junction temperature with full characterization and statistical process control-valid for automotive infotainment and ADAS power rails. |
Applications
| FPGA Core Supply | Automotive Infotainment |
|---|---|
Use Scenario: Powering 0.8V–1.2V core rails of Xilinx Artix-7 or Intel Cyclone V FPGAs in compact edge computing modules. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 3A with <1% line/load regulation and <50µs load transient recovery. Use Value: 22ns min on-time and 2MHz switching enable small 470nH inductors and 10µF ceramic output caps-reducing solution size by 40% vs. legacy 500kHz converters. |
Use Scenario: Supplying 1.1V DDR memory and 1.8V I/O rails in head-unit systems operating across –40°C to +105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 Grade I DC/DC converter providing robust, low-noise power with integrated thermal shutdown and PGOOD monitoring. Use Value: Silent Switcher® architecture eliminates need for metal shields, reducing EMI filter cost and enabling placement near RF receivers without interference. |
| Battery-Powered IoT Sensor Node | Distributed Telecom POL |
Use Scenario: Regulating 3.3V battery input to 1.2V MCU core in long-life wireless sensor nodes with 10-year battery target. IC Role / Device Role / Timing Role: Ultra-low-IQ (40µA) Buck converter operating in Burst Mode® during sleep cycles, waking only on scheduled sensor reads. Use Value: 40µA quiescent current extends shelf life and runtime; precision 400mV EN threshold enables controlled wake-up from microcontroller GPIO. |
Use Scenario: Providing 0.95V @ 3A to ASICs in 48V intermediate bus telecom equipment with strict EMI limits. IC Role / Device Role / Timing Role: Synchronized POL regulator locked to system clock via MODE/SYNC pin to avoid beat frequencies and simplify EMI filtering. Use Value: External clock synchronization (1–3MHz) eliminates switching noise sidebands, easing compliance with FCC Part 15 Class A emissions requirements. |
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 |
|---|---|---|---|
| MP2164GQZ-P | 4A rating, 2.5V–5.5V input, fixed 1.2V output; no RT programming or SYNC capability; 12µA IQ in shutdown only. | Lacks Burst Mode® and remote AGND sensing-less suitable for precision low-noise or wide-VOUT applications. | Choose MP2164GQZ-P only for fixed-output, cost-sensitive designs where programmability and ultra-low-noise are not required. |
| TPS6286418RRLR | 3A, 2.7V–6V input, 1.8V fixed output; 1.8MHz switching; 17µA IQ; no Silent Switcher®; QFN-12 package same footprint but different pinout. | No AGND remote sense, no Burst Mode®, lower EMI performance-requires additional filtering in noise-critical systems. | Select TPS6286418RRLR for non-automotive, non-EMI-constrained applications needing simpler layout and TI ecosystem support. |
Compared with MP2164GQZ-P and TPS6286418RRLR, the LTC3307AIV#TRMPBF offers superior EMI performance via Silent Switcher®, true programmable VOUT down to 0.5V, and industry-leading light-load efficiency-making it optimal for automotive, FPGA, and battery-sensitive designs where noise, accuracy, and flexibility are critical.
Availability
LTC3307AIV#TRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive infotainment systems, and battery-powered IoT sensor nodes requiring stable component supply, AEC-Q100 qualification, and ultralow EMI performance.
Supply support for LTC3307AIV#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 LTC3307AIV#TRMPBF belongs to Analog Devices' Silent Switcher® DC/DC converter family, engineered for ultra-low EMI and high efficiency in space-constrained, noise-sensitive applications such as automotive ADAS and high-speed digital systems.
FAQ
What is the operating temperature range for the LTC3307AIV#TRMPBF?
The LTC3307AIV#TRMPBF is rated for an operating junction temperature range of –40°C to +125°C and is qualified to AEC-Q100 Grade I standards. This makes it suitable for automotive cabin and industrial environments where extended thermal stability is required. The device incorporates thermal shutdown that activates at ~165°C and releases at ~160°C to protect against sustained overtemperature conditions.
Does the LTC3307AIV#TRMPBF support external clock synchronization?
Yes, the LTC3307AIV#TRMPBF supports external clock synchronization via its MODE/SYNC pin. When driven with a 1MHz–3MHz square wave, the internal PLL locks the switching frequency and phase to the external source while operating in forced continuous mode. Slope compensation automatically adapts to the applied frequency, ensuring stable current-mode control without manual tuning.
How does the AGND pin function in the LTC3307AIV#TRMPBF?
The AGND pin on the LTC3307AIV#TRMPBF serves two critical roles: it is both the analog ground reference for internal circuitry and the remote output voltage sense point. To achieve ±1% regulation accuracy, AGND must be connected directly to the negative terminal of the output capacitor at the load-not to the IC's PGND plane-thereby rejecting PCB trace resistance errors in high-current paths.
What are the key differences between Burst Mode® and forced continuous mode in the LTC3307AIV#TRMPBF?
In Burst Mode®, the LTC3307AIV#TRMPBF pulses at light loads to maintain regulation while drawing only 40µA IQ, minimizing power loss-but introduces low-frequency ripple. In forced continuous mode, it switches at fixed frequency regardless of load, eliminating ripple and improving EMI predictability at the cost of higher light-load current (~1.2mA). Mode selection is set via the MODE/SYNC pin voltage level.
Can the LTC3307AIV#TRMPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3307AIV#TRMPBF supports up to 100% duty cycle operation, allowing it to maintain regulation as the input voltage approaches the output voltage (e.g., 1.2VOUT from 1.3VIN). This dropout capability is essential for battery-powered systems nearing end-of-discharge, where maintaining stable core voltage without brownout is critical for system reliability.
LTC3307AIV#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3307AIV#TRMPBF FAQ
1.How can I place an order for LTC3307AIV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307AIV#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 LTC3307AIV#TRMPBF reliable?
The price and inventory of LTC3307AIV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307AIV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3307AIV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307AIV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307AIV#TRMPBF?
LTC3307AIV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307AIV#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 LTC3307AIV#TRMPBF?
For technical support, including LTC3307AIV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307AIV#TRMPBF requirements.
6.How does Aetrix verify that LTC3307AIV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307AIV#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 LTC3307AIV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3307AIV#TRMPBF?
All LTC3307AIV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307AIV#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 LTC3307AIV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3307AIV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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