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Analog Devices Inc. LTC3307AEV#TRMPBF
- Part No.:
- LTC3307AEV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307AEV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,505
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Product details
Overview
LTC3307AEV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output current with 2.25V–5.5V input range, 0.5V–VIN output range, ±1% VFB accuracy, and Silent Switcher® architecture for ultralow EMI - deployed in FPGA core supplies, optical networking POL rails, and battery-powered industrial systems.
For engineers reviewing the LTC3307AEV#TRMPBF datasheet, LTC3307AEV#TRMPBF pinout, LTC3307AEV#TRMPBF application, or LTC3307AEV#TRMPBF equivalent, key selection criteria include its 22ns minimum on-time, programmable 1MHz–3MHz switching frequency, forced continuous/pulse-skipping/Burst Mode operation, 8mΩ NMOS / 31mΩ PMOS RDS(ON), and thermal performance in the 2mm × 2mm LQFN package.
Technical Context
The LTC3307AEV#TRMPBF 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 integrates split power planes and differential SW routing to suppress common-mode EMI.
Mode selection is controlled via the MODE/SYNC pin: grounded for pulse-skipping, floating for forced continuous, tied to VIN for Burst Mode (40µA IQ). Clock synchronization (1MHz–3MHz) is supported via the same pin, with automatic slope compensation adaptation and seamless fallback to RT-programmed frequency upon clock loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and 3.3V/5V system rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables direct regulation for sub-1V FPGA/ASIC cores and wide-input POL applications. |
| Output Accuracy | ±1% over temperature - ensures stable voltage margining for precision analog and digital loads. |
| Switch RDS(ON) | 8mΩ (NMOS) / 31mΩ (PMOS) - minimizes conduction loss at 3A, enabling >90% efficiency at mid-load in 2MHz operation. |
| Min On-Time | 22ns - allows high-frequency, high-ratio conversion (e.g., 5.5V→0.5V @ 2MHz) with small inductors. |
| Quiescent Current | 40µA in Burst Mode sleep - extends battery runtime in always-on IoT and portable instrumentation. |
| Thermal Rating | –40°C to +125°C junction - qualified for automotive infotainment, industrial PLCs, and telecom base station edge nodes. |
Pinout & Package
The LTC3307AEV#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 resistance (θJA = 51°C/W).
| 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 at load 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 high-current paths for internal circuitry and top switch; requires low-ESR ceramic bypass to PGND/AGND. |
| PGND (Pins 4, 7, Exposed Pad 13) | Power ground return | Primary return for bottom switch; exposed pad must be connected with ≥6 vias to inner/outer ground planes for thermal and EMI control. |
| SW (Pins 5, 6) | Switch node output | High dv/dt node connecting internal FETs to external inductor; requires short, wide trace to minimize ringing and EMI. |
| MODE/SYNC (Pin 9) | Mode selection & sync input | Configures light-load behavior (pulse-skip/Burst/forced continuous) or accepts 1–3MHz external clock for system-wide timing alignment. |
| RT (Pin 10) | Frequency programming | Resistor-to-AGND sets switching frequency (1–3MHz); ignored when external clock applied to MODE/SYNC. |
| PGOOD (Pin 11) | Power good indicator | Open-drain output asserting high when VOUT is within –2%/+10% of target; includes 120µs delay and hysteresis for noise immunity. |
| FB (Pin 12) | Feedback input | Senses regulated 0.5V reference; connects to resistor divider from VOUT to AGND to set output voltage precisely. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Integrated split power planes and balanced SW routing reduce radiated EMI by >30dB vs conventional buck converters, eliminating need for metal shielding in space-constrained designs. |
| Three Light-Load Operating Modes | Selectable via MODE/SYNC pin: Burst Mode (40µA IQ), pulse-skipping (low-noise), or forced continuous (fixed-frequency, minimal ripple) - enables optimization for efficiency, noise, or transient response per application. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VOUT ≈ VIN – ILOAD×RDS(ON), critical for maintaining output during brownout or battery sag conditions. |
| Robust Protection Suite | Includes output overvoltage lockout (110% VOUT), short-circuit protection, thermal shutdown (165°C), and inductor saturation tolerance - eliminates need for external fault management circuitry. |
| Internal Compensation | Eliminates external compensation network, reducing BOM count and layout sensitivity while maintaining stability across 0.5V–5.5V VOUT range and all load conditions. |
Applications
| Optical Networking Line Cards | FPGA Core Power Delivery |
|---|---|
Use Scenario: Regulating 1.2V/3A for FPGA transceiver banks in 100G coherent modules with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Primary POL regulator with Silent Switcher® EMI suppression and 22ns min-on-time enabling compact 2MHz design. Use Value: Meets EN55022 Class B radiated emissions without shielding, reduces board area by 40% vs legacy solutions, and maintains <±1% output accuracy across –40°C to +85°C ambient. | Use Scenario: Supplying adaptive voltage scaling (AVS) rails for Xilinx Versal ACAP cores requiring fast load transient response and low noise. IC Role / Device Role / Timing Role: Synchronous buck controller with forced continuous mode and internal compensation for sub-100ns load-step recovery. Use Value: Achieves <20mV undershoot on 1A/µs load step due to 22ns min-on-time and wide bandwidth error amplifier, eliminating need for external feedforward capacitors. |
| Automotive Infotainment SoC | Portable Medical Instrumentation |
Use Scenario: Powering ARM-based SoC in head-unit displays with AEC-Q100-compliant thermal and reliability requirements. IC Role / Device Role / Timing Role: High-efficiency 3A step-down converter operating from 3.3V/5V bus with Burst Mode for standby current reduction. Use Value: Delivers 40µA quiescent current in Burst Mode sleep, extending battery backup time to >72 hours; qualified to –40°C to +125°C junction per AEC-Q100 Grade 1. | Use Scenario: Generating ultra-low-noise 1.8V rail for ADC/DAC signal chains in handheld ultrasound devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-EMI, low-ripple power source using forced continuous mode and Silent Switcher® architecture. Use Value: Reduces switching noise floor by 25dB below 100MHz, preventing interference with 12-bit SAR ADC sampling and improving SNR by 3.5dB. |
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 |
|---|---|---|---|
| TPS62864DLCR | 4A rating, 1.8V–5.5V input, 500mV–3.3V output, 1.8MHz fixed freq, 12µA IQ in DCM | Better light-load efficiency but lacks Silent Switcher® EMI performance and 22ns min-on-time for high-ratio conversion | Preferred for cost-sensitive, low-EMI-budget applications where 3A output suffices and 0.5V output is not required |
| MP2174GQZ-P | 3A, 2.5V–5.5V input, 0.6V–5.5V output, 2MHz fixed freq, 25µA IQ, no SYNC or MODE pin | No mode selection or clock sync; simpler interface but less flexible for system-level timing control | Selected when fixed-frequency operation and minimal external components outweigh need for Burst Mode or EMI optimization |
Compared with TPS62864DLCR and MP2174GQZ-P, the LTC3307AEV#TRMPBF uniquely combines 3A capability, 0.5V output, 22ns min-on-time, Silent Switcher® EMI suppression, and three selectable light-load modes - making it optimal for space-constrained, noise-sensitive, and high-ratio POL applications where thermal and electromagnetic compliance are critical.
Availability
LTC3307AEV#TRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, optical networking line cards, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3307AEV#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 precision instrumentation, communications, and industrial markets.
The LTC3307A product line delivers ultra-small, high-efficiency, low-EMI synchronous buck converters for space-constrained, noise-sensitive point-of-load applications - designed specifically for FPGA, ASIC, and SoC core power in telecom, automotive, and medical equipment.
FAQ
What is the maximum output current capability of the LTC3307AEV#TRMPBF?
The LTC3307AEV#TRMPBF delivers up to 3A continuous output current under typical thermal conditions (TA = 25°C, 2-layer PCB, θJA = 51°C/W). Peak current limit is 4.5A to 5.1A depending on VOUT/VIN ratio, and bottom switch valley current limit is 3.9A. Derating applies above 85°C ambient or with reduced airflow.
Does the LTC3307AEV#TRMPBF require external compensation components?
No, the LTC3307AEV#TRMPBF features fully internal compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies layout, reduces BOM count, and ensures stable operation across its full 0.5V–VIN output range and all load conditions without tuning.
How does the MODE/SYNC pin configure operating modes on the LTC3307AEV#TRMPBF?
The MODE/SYNC pin configures three distinct behaviors: grounding selects pulse-skipping mode (low-noise, moderate efficiency), floating enables forced continuous mode (fixed frequency, lowest ripple), and tying to VIN activates Burst Mode (40µA IQ, highest light-load efficiency). It also accepts 1–3MHz external clocks for synchronization.
What package type and thermal characteristics apply to the LTC3307AEV#TRMPBF?
The LTC3307AEV#TRMPBF uses a 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed PGND pad (Pin 13). Its thermal resistance is θJA = 51°C/W (JEDEC 2S2P board), θJB = 12°C/W, and ΨJT = 0.6°C/W - requiring soldered exposed pad and ≥6 thermal vias to inner ground planes for optimal performance.
Is the LTC3307AEV#TRMPBF AEC-Q100 qualified?
Yes, the LTC3307AEV#TRMPBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C junction temperature). It meets stress test requirements for reliability, including HTOL, TC, UHAST, and ESD, and is approved for use in infotainment, ADAS domain controllers, and body electronics.
LTC3307AEV#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)
LTC3307AEV#TRMPBF FAQ
1.How can I place an order for LTC3307AEV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307AEV#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 LTC3307AEV#TRMPBF reliable?
The price and inventory of LTC3307AEV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307AEV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3307AEV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307AEV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307AEV#TRMPBF?
LTC3307AEV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307AEV#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 LTC3307AEV#TRMPBF?
For technical support, including LTC3307AEV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307AEV#TRMPBF requirements.
6.How does Aetrix verify that LTC3307AEV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307AEV#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 LTC3307AEV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3307AEV#TRMPBF?
All LTC3307AEV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307AEV#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 LTC3307AEV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3307AEV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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