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Analog Devices Inc. LTC3310SEV-1#PBF
- Part No.:
- LTC3310SEV-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV-1#PBF.pdf
- Description:
- IC REG BUCK 1V 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:449
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Product details
Overview
LTC3310SEV-1#PBF from Analog Devices is a monolithic, Silent Switcher 2 synchronous step-down DC/DC converter delivering up to 10A output current from 2.25V–5.5V input, with fixed 1.0V output, ±1% accuracy (with remote sense), and 35ns minimum on-time. It operates in pulse-skip or forced continuous mode, supports clock synchronization up to 2.25MHz, and targets FPGA/ASIC core supplies requiring low EMI and fast transient response.
For engineers reviewing the LTC3310SEV-1#PBF datasheet, LTC3310SEV-1#PBF pinout, LTC3310SEV-1#PBF application, or LTC3310SEV-1#PBF equivalent, key selection criteria include its AEC-Q100 qualification, 18-lead 3mm × 3mm LQFN thermally enhanced package, 1µA shutdown current, precision 400mV enable threshold, and integrated output short-circuit protection with valley-current limiting.
Technical Context
The LTC3310SEV-1#PBF employs constant-frequency peak current mode control with internal 500mV reference (adjusted to 1.0V via internal resistor divider) and Silent Switcher 2 architecture featuring integrated VIN-to-PGND and VIN-to-AGND bypass capacitors. Its 35ns minimum on-time enables high step-down ratios at up to 5MHz switching frequency, while programmable MODE/SYNC pin supports multiphase paralleling and external clock synchronization.
It integrates active voltage positioning (AVP) for load-dependent output regulation (1.7–3.1mV/A droop), die temperature monitoring via SSTT pin (4mV/°C slope), and dual overvoltage/undervoltage protection on PGOOD (97–99% rising threshold, 106–112.5% OV threshold). Thermal shutdown and 100% duty cycle dropout operation are built-in.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.0V output with ±1% accuracy over temperature and line/load - ensures stable core supply for digital ICs without external feedback resistors. |
| IOUT Max | 10A continuous output current - supports high-power FPGA, ASIC, and µP core rails in compact POL designs. |
| VIN Range | 2.25V to 5.5V input - compatible with single-cell Li-ion, 3.3V, and 5V intermediate bus architectures. |
| fSW Range | 0.5MHz to 5MHz programmable via RT pin - enables optimization of size (high fSW) vs. efficiency (lower fSW) and EMI filtering requirements. |
| Shutdown IQ | 1µA - minimizes battery drain in always-on systems during standby or deep sleep modes. |
| EN Threshold | Precision 400mV rising threshold with 60mV hysteresis - allows accurate power sequencing using simple resistor dividers from higher-voltage rails. |
| Min On-Time | 35ns - supports 1.0V output from as low as ~1.2V input at 2MHz, enabling ultra-high step-down ratio applications. |
| Package | 18-lead 3mm × 3mm LQFN with exposed PGND pad - provides low θJA = 42°C/W and robust thermal performance for 10A operation in space-constrained layouts. |
Pinout & Package
Package: 18-lead (3mm × 3mm) LQFN with exposed thermal pad (Pin 19 = PGND), rated for –40°C to +125°C junction temperature. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Logic-level enable with 400mV precision threshold; pulls device into 1µA shutdown when below hysteresis. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for feedback divider low-side; rejects up to ±100mV PCB ground offset for accurate VOUT regulation. |
| VIN (3,4,11,12) | Input power supply inputs | Four parallel pins reduce IR drop and inductance; require local low-ESR ceramic bypassing to PGND. |
| PGND (5,10,19) | Power ground return | Primary thermal path and bottom-switch return; Pin 19 is exposed pad - must be soldered to large PCB ground plane. |
| SW (6–9) | Switch node outputs | Four paralleled switch-node terminals connect directly to inductor; minimize loop area for EMI reduction. |
| MODE/SYNC (13) | Multi-phase sync & mode control | Configures pulse-skip/forced-continuous mode or accepts/sends sync clock (0.5–2.25MHz) for interleaved operation. |
| PGOOD (14) | Power-good open-drain output | Asserts high-Z when VOUT is within 97–99% of 1.0V; includes 100µs delay to reject transients. |
| RT (15) | Oscillator frequency set | Resistor-to-AGND sets fSW (0.5–5MHz); also used for phase offset in multi-phase configurations. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current source for soft-start capacitor; transitions to die temperature monitor (4mV/°C) post-startup. |
| ITH (17) | Loop compensation node | Connects external RC network to AGND for stability tuning; directly controls peak inductor current limit. |
| FB/VOUT (18) | Feedback input / fixed-output sense | On LTC3310SEV-1#PBF: internally connected to 1.0V divider - no external resistors needed; FB pin is unused. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors eliminate external high-frequency ceramics, reducing EMI emissions by >30dB vs. SS1 and enabling CISPR 25 Class 5 compliance. |
| Active Voltage Positioning (AVP) | Programmable 1.7–3.1mV/A output droop compensates for IR drop across PCB traces, improving transient response and reducing required output capacitance by up to 40%. |
| Valley Current Limit Protection | Bottom-switch current limit (10–14A) prevents inductor saturation during overload or short-circuit, enabling safe recovery via controlled soft-start reinitiation. |
| Thermally Enhanced LQFN | θJCbottom = 9°C/W and exposed PGND pad allow 10A operation at ≤125°C junction temperature with minimal copper area (≥4 cm² 2oz Cu). |
| Robust Power Sequencing Support | Independent EN threshold (400mV), PGOOD with hysteresis, and SSTT-based tracking enable precise coordination with multiple rails in complex SoC/FPGA systems. |
| AEC-Q100 Qualified | Rated for automotive-grade reliability (Grade E, –40°C to +125°C), including HTOL, TC, and UHAST testing - suitable for ADAS, infotainment, and body electronics. |
Applications
| FPGA Core Supply | Automotive ADAS Processor Rail |
|---|---|
Use Scenario: Powering Xilinx Versal or Intel Agilex FPGA core logic operating at 1.0V with dynamic current draw from 0.5A to 10A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated 1.0V with <10mV ripple and sub-10µs transient recovery. Use Value: AVP and 35ns min-on-time maintain regulation during rapid load steps; Silent Switcher 2 meets strict EMI limits in dense PCB layouts near RF receivers. | Use Scenario: Supplying NVIDIA Orin or TI Jacinto 7 processor cores in automotive camera ECU with ISO 26262 functional safety requirements. IC Role / Device Role / Timing Role: AEC-Q100 qualified POL converter delivering 1.0V/10A with PGOOD signaling and thermal monitoring for system health management. Use Value: Integrated temperature sensing (SSTT pin), 125°C operation, and robust short-circuit recovery ensure reliability in under-hood environments. |
| Industrial PLC CPU Module | 5G Baseband Radio Card |
Use Scenario: Powering ARM Cortex-A72-based controller in DIN-rail mounted PLC with wide ambient temperature range (–40°C to +70°C). IC Role / Device Role / Timing Role: High-efficiency (92% @ 10A, 3.3V→1.0V) DC/DC converter with forced continuous mode for low-noise operation in analog-sensitive modules. Use Value: 1µA shutdown current extends backup battery life; 400mV EN threshold enables clean sequencing from 3.3V auxiliary rail. | Use Scenario: Point-of-load conversion for 1.0V FPGA fabric in massive MIMO radio unit requiring low EMI to avoid interference with adjacent RF front-end. IC Role / Device Role / Timing Role: Synchronized multi-phase buck stage (via MODE/SYNC) operating at 2.25MHz to minimize filter size and meet spectral mask requirements. Use Value: External clock synchronization eliminates beat frequencies; LQFN package enables dense layout with minimal loop area for radiated emissions control. |
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 |
|---|---|---|---|
| TPS546D24A | 6V max VIN, 10A, fixed 1.0V, but uses D-CAP3 control (no RT pin), no AVP, larger 4mm × 4mm QFN package. | Optimized for server VR13/VR14 compliance; lacks Silent Switcher EMI performance and automotive qualification. | Select for cost-sensitive telecom infrastructure where EMI is managed externally and AEC-Q100 is not required. |
| MPM3695-100 | 5.5V max VIN, 10A, fixed 1.0V, integrated inductor, but only 2.2MHz max fSW, no PGOOD, no temperature monitor, non-AEC-Q100. | Ultra-compact module solution; trades off design flexibility, diagnostics, and automotive reliability for board area savings. | Select for space-constrained consumer or industrial IoT where full diagnostics and extended temperature range are secondary to footprint. |
Compared with TPS546D24A and MPM3695-100, the LTC3310SEV-1#PBF uniquely combines AEC-Q100 qualification, Silent Switcher 2 EMI suppression, AVP, and die temperature monitoring in a 3mm × 3mm LQFN - making it optimal for safety-critical, noise-sensitive, and thermally demanding automotive and industrial POL applications.
Availability
LTC3310SEV-1#PBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS processors, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3310SEV-1#PBF 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 LTC3310S family is designed for high-density, low-EMI point-of-load power conversion in FPGA, ASIC, and µP core applications - emphasizing ultralow noise, fast transient response, and robust thermal performance in miniature packages.
FAQ
What is the output voltage setting of the LTC3310SEV-1#PBF?
The LTC3310SEV-1#PBF has a factory-trimmed fixed output voltage of 1.0V with ±1% accuracy over temperature, line, and load conditions. Unlike the adjustable LTC3310S variant, it requires no external feedback resistors - the internal resistor divider connects directly to the VOUT pin (Pin 18), simplifying layout and reducing BOM count.
Does the LTC3310SEV-1#PBF support synchronization to an external clock?
Yes, the LTC3310SEV-1#PBF supports external clock synchronization via the MODE/SYNC pin (Pin 13). When driven with a square wave (0.5–2.25MHz), it locks its internal oscillator using a PLL, enabling deterministic phase alignment for multi-phase interleaving and EMI spreading. The device automatically adapts slope compensation and enters pulse-skip mode during sync.
How does the LTC3310SEV-1#PBF implement output short-circuit protection?
The LTC3310SEV-1#PBF uses dual-level current limiting: peak current control via the ITH pin and valley current limiting (IVALLEYMAX = 10–14A) on the bottom switch. During a short, valley detection holds off the top switch until inductor current falls below threshold. Recovery initiates a new soft-start cycle triggered by pulling the SSTT pin low relative to FB voltage.
Is the LTC3310SEV-1#PBF qualified for automotive applications?
Yes, the LTC3310SEV-1#PBF is AEC-Q100 qualified (Grade E, –40°C to +125°C junction temperature) and manufactured with controlled processes for automotive reliability. It includes features critical for automotive use: PGOOD with hysteresis, die temperature monitoring (SSTT pin), and robust EMI performance per CISPR 25 Class 5 - making it suitable for ADAS, infotainment, and body electronics.
What thermal design considerations apply to the LTC3310SEV-1#PBF at 10A load?
At 10A, the LTC3310SEV-1#PBF requires proper thermal management: the exposed PGND pad (Pin 19) must be soldered to ≥4 cm² of 2oz copper with ≥6 thermal vias to inner/ground planes. With θJA = 42°C/W, 10A operation at 3.3V→1.0V yields ~1.5W dissipation - resulting in ~63°C rise above ambient. Keep ambient ≤62°C to stay within 125°C junction limit.
LTC3310SEV-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 18-TFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 10A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310SEV-1#PBF FAQ
1.How can I place an order for LTC3310SEV-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV-1#PBF 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 LTC3310SEV-1#PBF reliable?
The price and inventory of LTC3310SEV-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310SEV-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV-1#PBF?
LTC3310SEV-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV-1#PBF 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 LTC3310SEV-1#PBF?
For technical support, including LTC3310SEV-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV-1#PBF requirements.
6.How does Aetrix verify that LTC3310SEV-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV-1#PBF 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 LTC3310SEV-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV-1#PBF?
All LTC3310SEV-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV-1#PBF, 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 LTC3310SEV-1#PBF part is unused and in its original packaging.
Return procedure for LTC3310SEV-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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