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Analog Devices Inc. LTC3304CRUCM#TRPBF
- Part No.:
- LTC3304CRUCM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-PowerWFQFN
- Datasheet:
-
LTC3304CRUCM#TRPBF.pdf
- Description:
- IC REG BUCK 6A
- Quantity:
- Payment:
- Shipping:
Inventory:4,965
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Product details
Overview
LTC3304CRUCM#TRPBF from Analog Devices is a monolithic synchronous 6A step-down DC/DC converter operating from 2.25V to 5.5V input, delivering factory-fixed output voltage with ±1% accuracy over temperature, 6MHz switching frequency, and 80µA quiescent current in Burst Mode. It serves as a high-density POL regulator for FPGA core supplies, automotive infotainment power rails, and telecom baseband modules.
For engineers reviewing the LTC3304CRUCM#TRPBF datasheet, LTC3304CRUCM#TRPBF pinout, LTC3304CRUCM#TRPBF application, or LTC3304CRUCM#TRPBF equivalent, key selection criteria include its 6MHz fixed-frequency operation, side-wettable-flank FCQFN-12 package, 27ns minimum on-time, forced continuous/pulse-skipping/Burst Mode flexibility, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3304CRUCM#TRPBF implements constant-frequency peak current mode control with internal compensation, enabling fast transient response using minimal external components. Its 6MHz nominal oscillator frequency (±5% tolerance) supports compact 100nH–220nH inductors and low-profile ceramic capacitors while maintaining stable regulation down to 0.5V output.
It integrates dual MOSFETs with 34mΩ PMOS and 12mΩ NMOS RDS(ON), supports up to 100% duty cycle for low-dropout operation, and features programmable MODE/SYNC pin logic for selecting forced continuous, pulse-skipping, or Burst Mode-each with distinct trade-offs in ripple, efficiency, and noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - enables direct regulation from single-cell Li-ion, USB PD, or 3.3V/5V system rails without pre-regulation. |
| Switching Frequency | 6MHz (typical), ±5% - allows use of sub-220nH inductors and reduces output capacitor ESR requirements for space-constrained designs. |
| Output Current | 6A continuous - delivers full rated load in forced continuous mode with thermal derating above 125°C junction temperature. |
| Output Voltage Accuracy | ±1% over –40°C to +125°C - ensures stable core voltage for FPGA/ASIC under wide ambient and self-heating conditions. |
| Quiescent Current | 80µA in Burst Mode - extends battery runtime in always-on automotive telematics or IoT edge nodes during light-load sleep states. |
| Minimum On-Time | 27ns - supports high step-down ratios (e.g., 5V→0.5V at 6MHz) without pulse skipping or loss of regulation. |
| Thermal Protection | 165°C shutdown / 160°C restart - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
The LTC3304CRUCM#TRPBF is housed in a thermally enhanced 12-pin Flip-Chip QFN (FCQFN) package measuring 2mm × 2mm × 0.75mm with exposed pad and side-wettable flanks for automated optical solder inspection (AOI) and improved thermal transfer to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Precision 400mV threshold with 50mV hysteresis enables reliable power-up sequencing from upstream regulators or microcontroller GPIO. |
| VIN (Pins 2,3) | Main power input | Dual pins reduce IR drop and thermal resistance; require parallel connection and local 10µF low-ESR ceramic bypass to PGND. |
| SW (Pins 4,5) | Switch node | High-current path connecting internal MOSFETs to external inductor; must be routed with short, wide copper to minimize ringing and EMI. |
| PGND (Pins 6,7) | Power ground return | Dual low-inductance paths for bottom switch current; connect directly to input capacitor negative terminal and thermal pad. |
| MODE/SYNC (Pin 8) | Mode selection & clock sync | Configures operation mode (Burst/Continuous/Pulse-Skip) or accepts external 4.8–7.2MHz clock for system-level timing alignment. |
| PGOOD (Pin 9) | Power good indicator | Open-drain output asserts low if VOUT falls below 98% or exceeds 110% of target, with 120µs delay and built-in hysteresis. |
| VOUT (Pin 10) | Fixed-output voltage sense | Direct connection point for regulated output; ties to load-side AGND via remote sensing to compensate for PCB trace IR drop. |
| AGND (Pin 11) | Analog ground reference | Remote sense return for feedback loop; must connect to output capacitor cathode at load to maintain ±1% regulation accuracy. |
| AVIN (Pin 12) | Analog supply input | Decoupled via 10Ω resistor + 1µF ceramic to AGND; powers internal reference, error amp, and oscillator circuits independently of noisy power switches. |
Key Features
| Feature | Design Value |
|---|---|
| 6MHz Fixed-Frequency Operation | Enables <220nH inductors and <100µF total output capacitance for ultra-compact 2mm × 2mm footprint designs. |
| Burst Mode with 80µA IQ | Extends battery life in automotive ADAS cameras or portable test equipment by reducing no-load power dissipation by >90% vs PWM modes. |
| Side-Wettable Flank FCQFN | Supports automated AOI inspection of solder joints on production lines, improving yield and reliability in automotive-grade manufacturing. |
| 100% Duty Cycle Capability | Maintains regulation down to VIN = VOUT + (ILOAD × 34mΩ), critical for low-dropout operation in 3.3V-to-3.0V or 2.5V-to-2.2V applications. |
| AEC-Q100 Qualified | Rated for –40°C to +125°C ambient operation with validated HTOL, TC, and ESD performance per automotive stress test standards. |
Applications
| Automotive Infotainment Power | FPGA Core Supply |
|---|---|
Use Scenario: Powering SoC subsystems in head-unit displays requiring clean, sequenced 1.0V/1.2V rails with fast load transient response. IC Role / Device Role / Timing Role: Primary POL regulator delivering 6A peak current with <50mV undershoot during 4A load steps at 10µs edge rate. Use Value: 27ns minimum on-time and 6MHz switching enable tight regulation margin compliance for 16nm/7nm FPGA cores. | Use Scenario: Generating configurable core voltage for Xilinx Zynq or Intel Cyclone FPGA banks with dynamic voltage scaling. IC Role / Device Role / Timing Role: Adjustable-output buck controller supporting 0.5V–1.2V range via external resistors, synchronized to system clock via MODE/SYNC pin. Use Value: Internal compensation eliminates need for external type-II/III compensation networks, reducing BOM count and layout area. |
| Optical Networking Line Cards | Industrial PLC I/O Modules |
Use Scenario: Providing isolated 3.3V/2.5V bias for SFP+ transceivers and SerDes PHYs in compact line cards with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise synchronous buck operating in forced continuous mode to suppress switching harmonics near 10Gbps data lanes. Use Value: 34mΩ/12mΩ MOSFET pair achieves >92% efficiency at 3.3V/4A, minimizing thermal load in convection-cooled enclosures. | Use Scenario: Regulating 1.8V/1.2V rails for ARM Cortex-M7 microcontrollers and isolated CAN/FlexRay transceivers in harsh industrial environments. IC Role / Device Role / Timing Role: AEC-Q100 qualified DC/DC converter with overvoltage, short-circuit, and thermal protection for unattended 24/7 operation. Use Value: 165°C thermal shutdown and 1µA shutdown current ensure safe failure mode during brownout or cooling fan failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546C20ARVFT | 4.5V–18V input, 6A, 2.2MHz max, no Burst Mode, requires external compensation | Targeted at higher-input industrial systems; lacks low-IQ sleep mode for battery backup | Select when input exceeds 5.5V or when fixed 2.2MHz sync is required across multiple rails |
| MP28164GQVA-LF-Z | 2.7V–16V input, 6A, 500kHz–2.2MHz adjustable, 25µA IQ in skip mode, QFN-13 | Lower switching frequency increases inductor size; not AEC-Q100 qualified | Select for cost-sensitive non-automotive applications where 6MHz size advantage is unnecessary |
Compared with TPS546C20ARVFT and MP28164GQVA-LF-Z, the LTC3304CRUCM#TRPBF offers superior high-frequency density (6MHz), automotive qualification, and lowest light-load IQ-making it optimal for space- and reliability-critical 2.25V–5.5V POL applications.
Availability
LTC3304CRUCM#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, FPGA core supplies, and optical networking equipment requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3304CRUCM#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 automotive markets since 1965.
The LTC3304CRUCM#TRPBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters, engineered specifically for high-efficiency, high-density point-of-load regulation in space-constrained and thermally demanding applications.
FAQ
What is the switching frequency of the LTC3304CRUCM#TRPBF and how is it set?
The LTC3304CRUCM#TRPBF operates at a factory-programmed 6MHz nominal switching frequency with ±5% tolerance. This frequency is fixed internally and cannot be adjusted via external components. It may be synchronized to an external clock applied to the MODE/SYNC pin within ±20% of 6MHz (i.e., 4.8MHz to 7.2MHz), during which the device operates in forced continuous mode. The 6MHz frequency enables use of very small inductors (e.g., 100nH) and minimizes output capacitor requirements in compact designs.
Does the LTC3304CRUCM#TRPBF support remote voltage sensing and why is it important?
Yes, the LTC3304CRUCM#TRPBF supports remote voltage sensing via its AGND pin, which serves as the remote ground reference for the feedback loop. Connecting AGND directly to the output capacitor's negative terminal at the load compensates for IR drop across PCB traces and connectors, ensuring ±1% output voltage accuracy at the point of load-even with 100mΩ trace resistance. This is essential for powering sensitive FPGA or ASIC cores where voltage margin violations cause functional failures.
How does the MODE/SYNC pin configure operating modes on the LTC3304CRUCM#TRPBF?
The MODE/SYNC pin on the LTC3304CRUCM#TRPBF selects between three operating modes: floating enables pulse-skipping mode; tying to AVIN enables low-ripple Burst Mode (80µA IQ); and connecting to AGND enables forced continuous mode for lowest output ripple and fastest transient response. When driven by an external square wave (4.8–7.2MHz), it synchronizes the internal oscillator while enforcing forced continuous operation. Each mode directly impacts efficiency, noise, and light-load behavior-no external resistors or configuration registers are needed.
What protection features are integrated into the LTC3304CRUCM#TRPBF?
The LTC3304CRUCM#TRPBF integrates output overvoltage protection (OVP), short-circuit protection, thermal shutdown (165°C trip, 160°C reset), input undervoltage lockout (UVLO), and valley current limiting to prevent inductor saturation during overload. Its PGOOD pin provides open-drain fault signaling for VOUT out-of-tolerance conditions, and the EN pin includes precise 400mV threshold with hysteresis for controlled power sequencing. These protections operate autonomously without external circuitry, ensuring robust operation in automotive and industrial environments.
Is the LTC3304CRUCM#TRPBF suitable for automotive applications and what qualifications does it hold?
Yes, the LTC3304CRUCM#TRPBF is qualified to AEC-Q100 Grade 1 (–40°C to +125°C ambient) and manufactured under automotive-grade process controls. It meets stringent requirements for HTOL, temperature cycling, and ESD robustness required for infotainment, ADAS, and body electronics. The FCQFN package with side-wettable flanks supports automated optical inspection, and its 1µA shutdown current and 165°C thermal shutdown enhance safety in unattended automotive systems. Full automotive reliability reports are available from Analog Devices upon request.
LTC3304CRUCM#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TQFN (2x2)
LTC3304CRUCM#TRPBF FAQ
1.How can I place an order for LTC3304CRUCM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3304CRUCM#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 LTC3304CRUCM#TRPBF reliable?
The price and inventory of LTC3304CRUCM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3304CRUCM#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3304CRUCM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3304CRUCM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3304CRUCM#TRPBF?
LTC3304CRUCM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3304CRUCM#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 LTC3304CRUCM#TRPBF?
For technical support, including LTC3304CRUCM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3304CRUCM#TRPBF requirements.
6.How does Aetrix verify that LTC3304CRUCM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3304CRUCM#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 LTC3304CRUCM#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3304CRUCM#TRPBF?
All LTC3304CRUCM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3304CRUCM#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 LTC3304CRUCM#TRPBF part is unused and in its original packaging.
Return procedure for LTC3304CRUCM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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