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Analog Devices Inc. LTC3307AIV#TRPBF
- Part No.:
- LTC3307AIV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307AIV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,428
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Product details
Overview
LTC3307AIV#TRPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output at 0.5V–VIN from a 2.25V–5.5V input, featuring Silent Switcher® architecture, 22ns minimum on-time, and ±1% VFB accuracy over temperature. It operates in forced continuous, pulse-skipping, or low-ripple Burst Mode® for battery-powered FPGA core supplies and POL applications.
For engineers reviewing the LTC3307AIV#TRPBF datasheet, LTC3307AIV#TRPBF pinout, LTC3307AIV#TRPBF application, or LTC3307AIV#TRPBF equivalent, key selection criteria include its 2mm × 2mm LQFN package with exposed PGND pad, programmable 1MHz–3MHz switching frequency via RT pin, and support for 40µA quiescent current in Burst Mode operation.
Technical Context
The LTC3307AIV#TRPBF uses peak current mode control with internal compensation, enabling fast transient response without external loop components. Its 22ns minimum on-time supports high step-down ratios (e.g., 5.5V→0.5V at 2MHz), while the Silent Switcher® architecture minimizes EMI through symmetrical layout and integrated hot-loop capacitors.
Three operating modes-forced continuous (fixed-frequency, reverse-inductor-current allowed), pulse-skipping (clock-aligned, zero-current switching), and Burst Mode® (40µA IQ, low-ripple)-are selected via MODE/SYNC pin voltage level. Clock synchronization (1MHz–3MHz) and internal overvoltage/overtemperature protection are fully integrated.
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 core supply for modern FPGAs and ASICs down to sub-1V logic. |
| Output Accuracy | ±1% over temperature - ensures stable voltage regulation across industrial −40°C to +125°C junction range. |
| Switching Frequency | 1MHz to 3MHz (RT-programmable) - allows optimization of inductor size vs. efficiency for compact POL designs. |
| Top/Bottom RDS(ON) | 31mΩ / 8mΩ - reduces conduction loss and thermal rise at 3A load, supporting >90% efficiency at 1.2V/3A. |
| IQ in Burst Mode | 40µA - extends battery life in always-on IoT sensors and wearable devices during light-load standby. |
| Min. On-Time | 22ns - enables high-frequency, high-ratio conversion (e.g., 5.5V→0.5V at 2MHz) with small inductors. |
Pinout & Package
The LTC3307AIV#TRPBF 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 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 sequencing via resistor divider from upstream rail. |
| VIN (Pins 3, 8) | Main input power supply | Dual VIN 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 for bottom switch; exposed pad must be soldered to large PCB ground plane with ≥6 vias. |
| SW (Pins 5, 6) | Switch node | Connects to inductor; requires short, wide copper pour to minimize ringing and EMI in Silent Switcher layout. |
| MODE/SYNC (Pin 9) | Mode selection & clock sync | GND = pulse-skipping; VIN = Burst Mode®; float = forced continuous; external square wave = sync (1–3MHz). |
| RT (Pin 10) | Frequency programming | Resistor to AGND sets fSW; open = default ~2MHz; tied to VIN = same; ignored during external sync. |
| PGOOD (Pin 11) | Power-good indicator | Open-drain output asserts low if VOUT < 97% or >110% nominal, with 120µs delay and hysteresis. |
| FB (Pin 12) | Feedback input | Regulates to 0.5V; connects to resistor divider from VOUT to AGND; phase-lead cap optional for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Reduces radiated EMI by >30dB vs. conventional buck converters, eliminating need for ferrite beads or shielding cans. |
| Low-Ripple Burst Mode® | Delivers 40µA IQ with <10mVPP output ripple at light loads-critical for noise-sensitive RF and sensor circuits. |
| 100% Duty Cycle Operation | Enables dropout operation down to VIN − VOUT ≈ 100mV, supporting ultra-low headroom applications like 1.8V→1.2V conversion. |
| Integrated Overvoltage Protection | Shuts off top switch if FB exceeds 110% VREF, preventing damage to downstream 1.2V or 0.8V logic during fault conditions. |
| Thermally Enhanced LQFN | Exposed PGND pad and θJB = 12°C/W enable 3A continuous operation on 2-layer PCBs without heatsinks. |
Applications
| FPGA Core Supply | Battery-Powered IoT Node |
|---|---|
|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V core rails requiring 1.0V/2A with tight transient response. IC Role / Device Role / Timing Role: Primary POL regulator delivering regulated VCCINT with soft-start, PGOOD monitoring, and fast load-step recovery. Use Value: 22ns min-on-time and peak current mode control achieve <50µs recovery from 0.5A→2A load steps, minimizing voltage droop. |
Use Scenario: Ultra-low-power sensor hub with BLE radio, operating from coin cell or energy harvester. IC Role / Device Role / Timing Role: Main system regulator enabling deep-sleep modes with 40µA quiescent current and fast wake-up. Use Value: Burst Mode® operation extends battery life >3× vs. forced continuous mode while maintaining <10mV ripple during active sensing. |
| Optical Transceiver Module | Automotive ADAS Camera Power |
|
Use Scenario: Generating 1.8V/1.2A for SFP+ DSP and laser driver ICs in telecom line cards. IC Role / Device Role / Timing Role: High-efficiency, low-noise POL converter synchronized to system clock to avoid beat frequencies. Use Value: MODE/SYNC pin accepts 2.5MHz external clock, eliminating switching noise interference with 10Gbps data lanes. |
Use Scenario: Powering 1.1V image sensor and ISP in automotive rear-view camera meeting AEC-Q100 Grade 1. IC Role / Device Role / Timing Role: Automotive-qualified DC/DC with overtemperature shutdown and robust EN threshold for cold-crank immunity. Use Value: −40°C to +125°C guaranteed operation and 150°C thermal shutdown protect against under-hood thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2143GQ-Z | 2.5V–5.5V input, 3A, fixed 2MHz, no SYNC, higher IQ (65µA in skip mode), no Silent Switcher | Lacks EMI suppression features and external frequency sync; suitable only for non-noise-critical consumer boards | Select when cost sensitivity outweighs EMI compliance requirements and board space permits larger filtering components. |
| TPS6286418RRLR | 2.0V–5.5V input, 4A, 1.8V fixed output, 2.2MHz, integrated inductor option, lower IQ (12µA) | Fixed-output variant with lower max current; lacks programmable VOUT and RT-based frequency tuning | Choose for simplified design where 1.8V output and integrated inductor reduce BOM count and layout risk. |
Compared with MP2143GQ-Z and TPS6286418RRLR, the LTC3307AIV#TRPBF offers superior EMI performance, full VOUT programmability, and precise mode control-making it optimal for high-density, noise-sensitive, and automotive-grade POL systems where layout area and regulatory compliance are critical.
Availability
LTC3307AIV#TRPBF is available at Aetrix Electronics and suitable for FPGA core supplies, battery-powered IoT nodes, optical transceiver modules, and automotive ADAS camera power requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LTC3307AIV#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 precision instrumentation, communications, and industrial markets since 1965.
The LTC3307AIV#TRPBF belongs to Analog Devices' Silent Switcher® DC/DC converter family, engineered specifically for ultra-low EMI, high-efficiency point-of-load regulation in space-constrained, noise-sensitive applications such as 5G infrastructure and autonomous vehicle subsystems.
FAQ
What is the maximum output current capability of the LTC3307AIV#TRPBF?
The LTC3307AIV#TRPBF delivers up to 3A continuous output current under typical thermal conditions using the 2mm × 2mm LQFN package with proper PCB copper area and airflow. Its peak current limit is 4.5A to 5.1A (typical), allowing brief overload tolerance. Derating applies above +85°C ambient or with insufficient thermal vias to the PGND pad.
How does the MODE/SYNC pin configure operating modes on the LTC3307AIV#TRPBF?
The LTC3307AIV#TRPBF uses MODE/SYNC pin voltage to select three distinct modes: grounded → pulse-skipping; tied to VIN → Burst Mode® (40µA IQ); floating → forced continuous (fixed-frequency, reverse current allowed). An external 1MHz–3MHz square wave synchronizes switching and forces forced continuous mode.
Can the LTC3307AIV#TRPBF operate with an input voltage below 2.25V?
No-the LTC3307AIV#TRPBF has a specified minimum input voltage of 2.25V per Absolute Maximum Ratings and Electrical Characteristics tables. Below this, undervoltage lockout engages, disabling switching. The device will not regulate or sustain output below 2.25V input, even at light loads or reduced duty cycle.
What is the purpose of the AGND pin on the LTC3307AIV#TRPBF, and how should it be routed?
The AGND pin on the LTC3307AIV#TRPBF serves as the remote output voltage sense return and analog ground reference for the feedback amplifier. It must be connected directly to the negative terminal of the output capacitor at the load-not to the PGND plane-to reject PCB trace resistance errors and ensure ±1% regulation accuracy across varying load currents.
Does the LTC3307AIV#TRPBF support output voltages lower than 0.5V?
No-the LTC3307AIV#TRPBF regulates to a fixed 0.5V feedback reference (VFB = 0.495V to 0.505V), limiting the minimum programmable output to 0.5V when using standard resistor dividers. Output voltages below 0.5V are not supported; for sub-0.5V rails, a different converter with adjustable reference or external error amplifier is required.
LTC3307AIV#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3307AIV#TRPBF FAQ
1.How can I place an order for LTC3307AIV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307AIV#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 LTC3307AIV#TRPBF reliable?
The price and inventory of LTC3307AIV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307AIV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3307AIV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307AIV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307AIV#TRPBF?
LTC3307AIV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307AIV#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 LTC3307AIV#TRPBF?
For technical support, including LTC3307AIV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307AIV#TRPBF requirements.
6.How does Aetrix verify that LTC3307AIV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307AIV#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 LTC3307AIV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3307AIV#TRPBF?
All LTC3307AIV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307AIV#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 LTC3307AIV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3307AIV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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