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Analog Devices Inc. LTC3309BJV#TRMPBF
- Part No.:
- LTC3309BJV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3309BJV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 6A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:496
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Product details
Overview
LTC3309BJV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 6A output current, operating from 2.25V–5.5V input and regulating down to 0.5V with ±1% accuracy. It features Silent Switcher architecture, 22ns minimum on-time, 6.6MHz default switching frequency, and AEC-Q100 qualification for automotive-grade operation at –40°C to +150°C junction temperature.
For engineers reviewing the LTC3309BJV#TRMPBF datasheet, LTC3309BJV#TRMPBF pinout, LTC3309BJV#TRMPBF application, or LTC3309BJV#TRMPBF equivalent, key selection considerations include its 2mm × 2mm LQFN package with exposed PGND pad, programmable 3–10MHz frequency via RT resistor, forced continuous/pulse-skip/Burst Mode operation, and integrated overvoltage, short-circuit, and thermal protection.
Technical Context
The LTC3309BJV#TRMPBF employs constant-frequency peak current mode control with internal compensation, enabling fast transient response and stable regulation without external loop components. Its dual MOSFET power stage integrates an 8mΩ NMOS bottom switch and 31mΩ PMOS top switch, supporting up to 100% duty cycle for low-dropout operation.
Silent Switcher architecture minimizes EMI through symmetrical layout and differential SW node routing, while MODE/SYNC pin configuration enables three distinct light-load modes: Burst Mode (40µA IQ), pulse skip, or forced continuous-each with defined noise, efficiency, and ripple trade-offs.
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 |
| IOUT Max | 6A continuous - sufficient for FPGA core, ASIC, or microprocessor point-of-load supplies |
| VOUT Accuracy | ±1% over temperature - ensures tight regulation for sensitive digital loads |
| Switching Frequency | Programmable 3MHz–10MHz - enables compact 110nH inductor and 4.7µF ceramic capacitors |
| Min On-Time | 22ns - allows high VIN/VOUT ratios (e.g., 5V→1.8V at 6.6MHz) without pulse skipping |
| Thermal Rating | Junction temp –40°C to +150°C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive use |
| Quiescent Current | 40µA in Burst Mode sleep - extends battery life in always-on systems |
Pinout & Package
The LTC3309BJV#TRMPBF is housed in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed PGND pad (Pin 13) requiring solder connection to PCB ground plane for optimal thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (1) | Analog ground reference | Remote output voltage sense return; connects to load-side capacitor negative terminal and FB divider ground |
| EN (2) | Enable control input | 400mV precision threshold with hysteresis; enables power-up sequencing with external resistor divider |
| VIN (3,8) | Main power input | Dual pins for low-inductance connection to input capacitors; must be tied together with wide copper |
| PGND (4,7,13) | Power ground return | Return path for bottom switch and primary thermal conduction path via exposed pad |
| SW (5,6) | Switch node | Internal high-side/low-side MOSFET connection point; drives external inductor with minimal trace inductance |
| MODE/SYNC (9) | Mode selection & clock sync | Configures light-load behavior (Burst/Pulse Skip/Forced Continuous) or accepts 3–10MHz external clock |
| RT (10) | Frequency programming | Resistor-to-AGND sets switching frequency from 3–10MHz; open or tied to VIN selects default 6.6MHz |
| PGOOD (11) | Power good indicator | Open-drain output asserting high when VOUT is within –2%/+10% of target; includes 120µs delay and OV/UV fault detection |
| FB (12) | Feedback input | Regulates internal 500mV reference; connects to resistor divider between VOUT and AGND to set output voltage |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher architecture | Reduces radiated EMI by >20dB vs conventional buck converters, eliminating need for metal shielding cans |
| Low-ripple Burst Mode® | Delivers 40µA quiescent current with <10mVpp output ripple-ideal for noise-sensitive RF or sensor subsystems |
| 22ns minimum on-time | Enables direct 5V-to-1.8V conversion at 6.6MHz without frequency foldback or mode transition artifacts |
| Integrated 8mΩ/31mΩ MOSFETs | Eliminates external power switches and reduces solution size to <25mm² including inductor and capacitors |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with guaranteed operation from –40°C to +150°C junction temperature |
| 100% duty cycle capability | Supports ultra-low dropout operation (e.g., 2.5V→2.3V) with only RDS(ON) and inductor DCR losses |
Applications
| Automotive ADAS Power Supply | Optical Networking POL |
|---|---|
Use Scenario: Powering image signal processors and radar SoCs in front-camera modules requiring clean, compact, and high-temp-stable 1.2V/3A rails. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 5V domain to sub-1.8V core voltage with fast transient response to burst-mode processing loads. Use Value: Silent Switcher EMI reduction avoids interference with millimeter-wave radar receivers; 150°C rating enables placement near heat-generating sensors. |
Use Scenario: Generating 3.3V/6A bias for SFP+ transceivers and laser drivers in telecom line cards where board space and thermal density are constrained. IC Role / Device Role / Timing Role: High-efficiency synchronous buck supplying stable voltage during high-speed data bursts with minimal thermal rise. Use Value: 6.6MHz operation allows use of tiny 110nH inductors and 0201/0402 MLCCs, reducing footprint by >40% vs 1MHz solutions. |
| FPGA Core Voltage Regulator | Industrial IoT Edge Processor Supply |
Use Scenario: Delivering dynamically scaled 0.85V–1.2V at up to 6A to Xilinx Artix-7 or Intel Cyclone V FPGA cores with rapid load steps. IC Role / Device Role / Timing Role: Digitally transparent, internally compensated buck regulator providing precise voltage control without external compensation network. Use Value: 22ns min on-time and peak current mode control achieve <5µs recovery from 0→6A load transients, preventing logic errors. |
Use Scenario: Powering ARM Cortex-M7-based controllers in smart grid meters and factory HMIs operating continuously in uncooled enclosures. IC Role / Device Role / Timing Role: Primary system regulator converting 5V backplane to 1.8V I/O and 3.3V peripheral rails with robust fault handling. Use Value: Integrated OVP, SCP, and thermal shutdown eliminate need for discrete protection circuitry; 150°C rating ensures reliability in sealed industrial housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546B24A | 40V max VIN, 10A output, PMBus interface, larger 4mm × 4mm QFN | Targets higher-input industrial systems; lacks AEC-Q100 qualification and Silent Switcher EMI performance | Select when input exceeds 5.5V or digital telemetry is required; not drop-in for automotive or space-constrained designs |
| MP28164GQ | 5.5V max VIN, 6A, 2.5MHz fixed frequency, no MODE/SYNC pin, smaller 1.6mm × 1.6mm QFN | Lower cost alternative without Burst Mode or frequency programming; limited to 125°C operation | Choose for cost-sensitive consumer applications where 150°C rating and ultra-low IQ are not required |
Compared with TPS546B24A and MP28164GQ, the LTC3309BJV#TRMPBF uniquely combines AEC-Q100 Grade 1 qualification, 2mm × 2mm footprint, 40µA Burst Mode IQ, and certified low-EMI Silent Switcher operation-making it the only option meeting stringent automotive, optical networking, and high-density embedded requirements simultaneously.
Availability
LTC3309BJV#TRMPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, optical transceiver power supplies, FPGA core rails, industrial edge controllers, and telecom infrastructure requiring stable component supply across extended temperature ranges.
Supply support for LTC3309BJV#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3309BJV#TRMPBF belongs to Analog Devices' Silent Switcher µModule and monolithic DC/DC converter product line, engineered specifically for high-density, low-EMI power delivery in automotive, optical networking, and mission-critical embedded systems.
FAQ
What is the maximum junction temperature rating for the LTC3309BJV#TRMPBF?
The LTC3309BJV#TRMPBF is rated for operation up to +150°C junction temperature and is qualified per AEC-Q100 Grade 1. This specification is explicitly confirmed in the Absolute Maximum Ratings table and Temperature Range section of the official datasheet, distinguishing it from lower-grade variants like LTC3309BEV#TRMPBF (125°C). Thermal derating above 125°C is required per Analog Devices' lifetime guidelines.
Does the LTC3309BJV#TRMPBF support external clock synchronization?
Yes, the LTC3309BJV#TRMPBF supports external clock synchronization via its MODE/SYNC pin, accepting square wave inputs from 3MHz to 10MHz with ≥40ns high/low pulse widths and 0.4V/1.2V logic thresholds. During synchronization, the device operates exclusively in forced continuous mode with automatic slope compensation adaptation-confirmed in the "Synchronizing the Oscillator to an External Clock" section of the datasheet.
What is the typical quiescent current of the LTC3309BJV#TRMPBF in Burst Mode operation?
The LTC3309BJV#TRMPBF draws 40µA typical quiescent current in Burst Mode sleep state, as specified in the Electrical Characteristics table under "VIN Quiescent Current (Note 3)" for "Burst Mode Operation, Sleeping". This value is measured at TA = 25°C with VEN = VIN and is validated across the full –40°C to +150°C operating range per characterization data in Figure G14.
How is the output voltage programmed on the LTC3309BJV#TRMPBF?
The LTC3309BJV#TRMPBF output voltage is programmed using a resistor divider between VOUT and AGND, with the FB pin connected to the divider midpoint. The device regulates FB to 500mV (typical), so RA = RB × (VOUT/0.5V – 1). Recommended RB values are 10kΩ–100kΩ with 0.1% tolerance to maintain ±1% VOUT accuracy, as detailed in the "Output Voltage and Feedback Network" section of the datasheet.
What protection features are integrated into the LTC3309BJV#TRMPBF?
The LTC3309BJV#TRMPBF integrates output overvoltage protection (OVP), short-circuit protection (SCP), thermal shutdown, input undervoltage lockout (UVLO), and forward/reverse inductor current limiting. OVP triggers top-switch disable when FB exceeds 110% of nominal; SCP uses valley-current monitoring to skip cycles during overload; thermal shutdown activates at ~165°C junction temperature-each function verified in the Applications Information and Electrical Characteristics sections.
LTC3309BJV#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:
- 2
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3309BJV#TRMPBF FAQ
1.How can I place an order for LTC3309BJV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3309BJV#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 LTC3309BJV#TRMPBF reliable?
The price and inventory of LTC3309BJV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3309BJV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3309BJV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3309BJV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3309BJV#TRMPBF?
LTC3309BJV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3309BJV#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 LTC3309BJV#TRMPBF?
For technical support, including LTC3309BJV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3309BJV#TRMPBF requirements.
6.How does Aetrix verify that LTC3309BJV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3309BJV#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 LTC3309BJV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3309BJV#TRMPBF?
All LTC3309BJV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3309BJV#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 LTC3309BJV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3309BJV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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