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Analog Devices Inc. LTC3304ARUCM#TRPBF
- Part No.:
- LTC3304ARUCM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-PowerWFQFN
- Datasheet:
-
LTC3304ARUCM#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 6A 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,067
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Product details
Overview
LTC3304ARUCM#TRPBF from Analog Devices is a monolithic synchronous 6A step-down DC/DC converter operating from 2.25V to 5.5V input, delivering fixed 1.0V output with ±1% accuracy over temperature, 2MHz switching frequency, and 80µA quiescent current in Burst Mode. It serves as a high-efficiency, low-noise POL regulator for FPGA core supplies and battery-powered systems requiring fast transient response and thermal robustness.
For engineers reviewing the LTC3304ARUCM#TRPBF datasheet, LTC3304ARUCM#TRPBF pinout, LTC3304ARUCM#TRPBF application, or LTC3304ARUCM#TRPBF equivalent, key selection criteria include its 2mm × 2mm FCQFN package with side-wettable flanks, forced continuous/pulse-skipping/Burst Mode operation modes, 27ns minimum on-time, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3304ARUCM#TRPBF implements constant-frequency peak current mode control with internal compensation, enabling stable regulation using only external passive components. Its architecture integrates a 34mΩ PMOS high-side switch and 12mΩ NMOS low-side switch, supporting up to 100% duty cycle for low-dropout operation and tolerating inductor saturation during overload.
Mode selection is managed via the MODE/SYNC pin: floating enables pulse-skipping, AGND forces continuous conduction, and AVIN activates low-ripple Burst Mode with 80µA IQ. The device includes precision enable (400mV threshold), power good monitoring with 120µs delay, and overvoltage/overtemperature protection.
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. |
| Output Voltage | Fixed 1.0V - factory-programmed, eliminating external feedback resistors and reducing BOM count. |
| Max Output Current | 6A continuous - sufficient for modern FPGA, ASIC, and microprocessor core supplies. |
| Switching Frequency | 2MHz nominal - enables compact 220nH inductors and low-profile ceramic capacitors. |
| Quiescent Current | 80µA in Burst Mode - extends battery life in always-on IoT and portable applications. |
| Accuracy | ±1% over temperature - ensures reliable voltage margining for sensitive digital loads. |
| Min On-Time | 27ns - supports high step-down ratios (e.g., 5V→1V) at 2MHz without pulse skipping. |
Pinout & Package
The LTC3304ARUCM#TRPBF is housed in a thermally enhanced 12-pin 2mm × 2mm × 0.75mm Flip-Chip QFN (FCQFN) package with exposed pad and side-wettable flanks for automated optical inspection and improved solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Precision 400mV rising threshold enables accurate power sequencing with external resistor dividers. |
| VIN (Pins 2,3) | Main power input | Dual pins reduce trace resistance and inductance for high-current 6A input path. |
| SW (Pins 4,5) | Switch node | Dual-switch-node connection minimizes parasitic inductance for clean gate drive and EMI control. |
| PGND (Pins 6,7) | Power ground return | Dual PGND pins provide low-impedance return path for bottom FET and input capacitor. |
| MODE/SYNC (Pin 8) | Mode selection & clock sync | Configures Burst Mode (AVIN), forced continuous (AGND), or external clock sync (±20% range). |
| PGOOD (Pin 9) | Open-drain status output | Signals valid regulation (–2%/+10% window) with 120µs delay and fault pull-down during UVLO/shutdown. |
| VOUT (Pin 10) | Fixed output voltage sense | Direct connection to output capacitor; internally regulated to 1.0V ±1% - no external divider needed. |
| AGND (Pin 11) | Analog ground reference | Remote sense point for output voltage feedback; must connect to load-side capacitor negative terminal. |
| AVIN (Pin 12) | Analog supply input | Decoupled via 10Ω + 1µF to AGND; powers internal reference, error amp, and oscillator circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Ripple Burst Mode® | 80µA IQ with minimal output voltage ripple - ideal for noise-sensitive analog and RF subsystems. |
| Thermally Enhanced FCQFN | θJCBOTTOM = 6.4°C/W - enables 6A operation without heatsink in compact PCB layouts. |
| Side-Wettable Flanks | Enables AOI-compatible solder joint inspection - critical for automotive and industrial manufacturing yield. |
| AEC-Q100 Qualified | Rated for –40°C to +125°C ambient - validated for under-hood and infotainment applications. |
| Up to 100% Duty Cycle | Maintains regulation down to VIN ≈ VOUT + RDS(ON) × IOUT - supports ultra-low dropout in battery discharge scenarios. |
Applications
| FPGA Core Supply | Automotive Infotainment |
|---|---|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core logic requiring stable 1.0V at up to 6A with tight voltage tolerance. IC Role / Device Role / Timing Role: Primary POL regulator delivering low-noise, fast-transient 1.0V core voltage with soft-start and PGOOD sequencing. Use Value: 27ns min on-time and 2MHz switching enable compact 220nH inductor and <100µF total output capacitance. | Use Scenario: Supplying head unit SoC and display controller in ADAS dashboards where thermal and EMI constraints are stringent. IC Role / Device Role / Timing Role: AEC-Q100-compliant 1.0V POL regulator with Burst Mode for low-power standby and forced continuous for active processing. Use Value: Side-wettable flanks ensure solder joint reliability across thermal cycling; 150°C junction rating supports under-dash placement. |
| Optical Networking Line Card | Industrial PLC CPU Module |
Use Scenario: Generating 1.0V for SerDes PHYs and DSPs in 1RU optical transport equipment with strict airflow-limited cooling. IC Role / Device Role / Timing Role: High-efficiency, low-EMI buck converter operating in pulse-skipping mode during low-traffic periods. Use Value: 80µA Burst Mode IQ reduces idle power by >90% vs. linear regulators; 2MHz operation avoids AM radio band interference. | Use Scenario: Powering ARM Cortex-A9-based controller in DIN-rail mounted PLCs requiring long-term reliability and wide temperature operation. IC Role / Device Role / Timing Role: Robust 6A POL regulator with overvoltage, short-circuit, and thermal shutdown protection for harsh factory environments. Use Value: Integrated 34mΩ/12mΩ MOSFETs eliminate external power stage losses; FCQFN package withstands vibration and humidity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546B24RVFT | 6A, 2.7–16V input, adjustable 0.6–5.5V output; requires external compensation; 3.5mm × 3.5mm QFN. | Broad input range suits 12V intermediate bus; lacks AEC-Q100 rating and side-wettable flanks. | Select when wider VIN range or programmable VOUT is required; not drop-in for 1.0V fixed or automotive use. |
| MP2451DT-LF-Z | 0.6–6A, 3.3–36V input, fixed 1.0V option; 2MHz; 3mm × 3mm SOIC-8; no Burst Mode, 120µA IQ. | Higher VIN capability for industrial 24V systems; larger footprint and higher quiescent current limit battery life. | Choose for cost-sensitive 24V applications where 2mm × 2mm size and ultra-low IQ are non-critical. |
Compared with TPS546B24RVFT and MP2451DT-LF-Z, the LTC3304ARUCM#TRPBF delivers superior thermal performance in minimal area, AEC-Q100 compliance for automotive, and lowest IQ in Burst Mode - making it optimal for space-constrained, battery-aware, or safety-critical 1.0V POL designs.
Availability
LTC3304ARUCM#TRPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive infotainment systems, and optical networking line cards requiring stable component supply, long lifecycle support, and AEC-Q100 assurance.
Supply support for LTC3304ARUCM#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.
The LTC3304ARUCM#TRPBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters, designed specifically for high-current, low-voltage POL applications demanding minimal footprint, high efficiency, and automotive-grade reliability.
FAQ
What is the fixed output voltage of the LTC3304ARUCM#TRPBF?
The LTC3304ARUCM#TRPBF is factory-programmed for a fixed 1.0V output voltage with ±1% accuracy over the full operating temperature range (–40°C to +125°C). This eliminates the need for external feedback resistors and simplifies layout for high-density applications where consistent core voltage is critical. The LTC3304ARUCM#TRPBF uses an internal 500mV reference and precision trimming to achieve this accuracy without user adjustment.
Does the LTC3304ARUCM#TRPBF support external clock synchronization?
Yes, the LTC3304ARUCM#TRPBF supports external clock synchronization via its MODE/SYNC pin. When driven with a square wave signal within ±20% of its nominal 2MHz frequency, the internal oscillator locks to the external source and operates in forced continuous mode. This feature allows system-level timing alignment across multiple regulators and reduces beat frequencies in multi-rail power systems. The LTC3304ARUCM#TRPBF automatically reverts to its internal oscillator if the external clock is lost for more than 1.5 cycles.
What thermal protection features does the LTC3304ARUCM#TRPBF include?
The LTC3304ARUCM#TRPBF incorporates overtemperature protection that disables switching when the junction temperature reaches approximately 165°C, then resumes operation once the die cools to ~160°C. It also features thermal shutdown with automatic recovery and is rated for continuous operation up to 150°C junction temperature. The FCQFN package's low θJCBOTTOM (6.4°C/W) and exposed pad design allow sustained 6A output without external heatsinking in typical 2-layer PCB layouts. These protections ensure safe operation in enclosed or high-ambient environments.
How does the MODE/SYNC pin configure operating modes on the LTC3304ARUCM#TRPBF?
The MODE/SYNC pin on the LTC3304ARUCM#TRPBF selects between three distinct operating modes: floating enables pulse-skipping mode for balanced efficiency/noise; connecting to AGND forces continuous conduction for lowest output ripple and fastest transient response; tying to AVIN activates low-ripple Burst Mode with 80µA IQ for maximum light-load efficiency. Each mode preserves full 6A capability but optimizes trade-offs between EMI, thermal performance, and battery runtime. The LTC3304ARUCM#TRPBF does not require external components to set these modes.
Is the LTC3304ARUCM#TRPBF qualified for automotive applications?
Yes, the LTC3304ARUCM#TRPBF is AEC-Q100 qualified for automotive applications, rated for operation from –40°C to +125°C ambient temperature. It meets stringent automotive reliability standards including HTOL, TC, and UHAST testing. The FCQFN package with side-wettable flanks supports automated optical inspection for zero-defect manufacturing, and the integrated protections (OVP, SCP, OTP) align with functional safety requirements for infotainment and ADAS subsystems. The LTC3304ARUCM#TRPBF is approved for use in passenger compartment and under-dash locations.
LTC3304ARUCM#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-PowerWFQFN
- 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:
- 6A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TQFN (2x2)
LTC3304ARUCM#TRPBF FAQ
1.How can I place an order for LTC3304ARUCM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3304ARUCM#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 LTC3304ARUCM#TRPBF reliable?
The price and inventory of LTC3304ARUCM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3304ARUCM#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3304ARUCM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3304ARUCM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3304ARUCM#TRPBF?
LTC3304ARUCM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3304ARUCM#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 LTC3304ARUCM#TRPBF?
For technical support, including LTC3304ARUCM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3304ARUCM#TRPBF requirements.
6.How does Aetrix verify that LTC3304ARUCM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3304ARUCM#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 LTC3304ARUCM#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3304ARUCM#TRPBF?
All LTC3304ARUCM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3304ARUCM#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 LTC3304ARUCM#TRPBF part is unused and in its original packaging.
Return procedure for LTC3304ARUCM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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