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Analog Devices Inc. LTC3310SEV-1#WPBF
- Part No.:
- LTC3310SEV-1#WPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV-1#WPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,476
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Product details
Overview
LTC3310SEV-1#WPBF 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 over temperature, and 35ns minimum on-time. It integrates internal hot-loop bypass capacitors for ultralow EMI and operates in pulse-skip or forced continuous mode-used in FPGA core supplies requiring tight regulation and fast transient response.
For engineers reviewing the LTC3310SEV-1#WPBF datasheet, LTC3310SEV-1#WPBF pinout, LTC3310SEV-1#WPBF application, or LTC3310SEV-1#WPBF equivalent, key selection criteria include its AEC-Q100 qualification, 18-lead 3mm × 3mm LQFN package with exposed PGND pad, programmable switching frequency up to 5MHz, and integrated output short-circuit and thermal protection.
Technical Context
The LTC3310SEV-1#WPBF employs constant-frequency peak current mode control with a 500mV internal reference (adjusted to 1.0V via internal resistor divider), enabling precise regulation and fast load-step response. Its Silent Switcher 2 architecture embeds VIN-to-PGND and VIN-to-AGND bypass capacitors, minimizing high-di/dt loop area and achieving CISPR 25 Class 5 radiated EMI compliance without external filters.
It supports multiphase paralleling via MODE/SYNC pin, offers programmable soft-start with tracking, die temperature monitoring via SSTT pin, and active voltage positioning (AVP) with 2.4mV/A load-line slope-ensuring stable operation under dynamic FPGA/ASIC load transients while reducing output capacitance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.0V output with ±1% accuracy over –40°C to +125°C junction temperature-enables direct core supply for low-voltage processors without external feedback resistors. |
| IOUT Max | 10A continuous output current-supports high-current digital loads like FPGA I/O banks or GPU memory rails in compact PCB layouts. |
| VIN Range | 2.25V to 5.5V input-compatible with single-cell Li-ion, 3.3V intermediate bus, or 5V system rails without pre-regulation. |
| fSW Range | 0.5MHz to 5MHz programmable via RT pin-allows optimization of size (higher fSW) vs. efficiency (lower fSW) for POL applications. |
| RDS(ON) | 4.5mΩ NMOS / 16mΩ PMOS-minimizes conduction loss at 10A, enabling >90% efficiency at 3.3VIN/1.0VOUT in forced CCM. |
| Min On-Time | 35ns-supports high step-down ratios (e.g., 5V→1V at 2MHz) without pulse-skipping instability or duty-cycle limitation. |
| Shutdown IQ | 1µA-enables ultra-low power retention in battery-backed systems during deep sleep modes. |
Pinout & Package
Thermally enhanced 18-lead 3mm × 3mm LQFN package with exposed PGND pad (Pin 19), rated for –40°C to +125°C operating junction temperature. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control with precision threshold | 400mV rising threshold with 60mV hysteresis-enables accurate power sequencing and brown-out protection without external comparator. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for feedback divider-rejects up to ±100mV PCB ground offset, ensuring ±1% VOUT accuracy at load. |
| VIN (3,4,11,12) | Main power input | Four parallel pins reduce trace inductance and IR drop-critical for high di/dt stability and low EMI in Silent Switcher 2 architecture. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form low-inductance return for bottom switch-essential for thermal dissipation and noise containment. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins minimize switching loop inductance-reduces voltage spikes and EMI radiation in high-frequency operation. |
| MODE/SYNC (13) | Multi-phase sync & mode control | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock-enables interleaved operation for ripple cancellation in multi-rail systems. |
| PGOOD (14) | Power-good status indicator | Open-drain output with 97–99% VOUT rising threshold and 100µs delay-provides reliable system power sequencing and fault detection. |
| RT (15) | Oscillator frequency programming | Resistor-to-AGND sets fSW from 0.5–5MHz-allows layout-driven trade-off between inductor size and conduction loss. |
| SSTT (16) | Soft-start, tracking & temp monitor | 10µA current source for soft-start capacitor; transitions to 4mV/°C temp sensor post-startup-enables thermal derating and clean recovery from short circuits. |
| ITH (17) | Loop compensation node | Connects external RC network to AGND-sets crossover frequency and phase margin for stable regulation under wide load and line variations. |
| FB/VOUT (18) | Feedback input / fixed-output sense | On LTC3310SEV-1#WPBF, internally connected to 1.0V divider-eliminates external resistors and reduces BOM count for fixed-output designs. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors reduce high-frequency EMI by >20dB vs. Silent Switcher 1-meets CISPR 25 Class 5 without added filter components. |
| Active Voltage Positioning (AVP) | 2.4mV/A load-line slope-lowers VOUT under full load to improve transient headroom and reduce required bulk capacitance by up to 30%. |
| Configurable operation modes | Pulse-skip (light-load efficiency) or forced continuous (low-noise, predictable ripple)-selected via MODE/SYNC pin voltage, no external logic required. |
| Robust protection suite | Output overvoltage (106–112.5% VOUT), thermal shutdown, valley-current limiting (10–14A), and short-circuit recovery via SSTT-triggered soft-start-ensures safe operation under fault conditions. |
| AEC-Q100 qualified | Rated for automotive Grade E (–40°C to +125°C) with controlled manufacturing-validates reliability for ADAS, infotainment, and body electronics applications. |
Applications
| FPGA Core Supply | Automotive ADAS Power Rail |
|---|---|
Use Scenario: Powering Xilinx Kintex Ultrascale+ FPGA core logic with dynamic current demand from 0.5A to 9A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated 1.0V with <10mV load transient deviation and <20µs recovery. Use Value: AVP and 35ns min-on-time enable stable regulation across full load range without external compensation, reducing total solution size by 25% vs. legacy controllers. |
Use Scenario: Generating 1.0V rail for radar processor SoC in automotive front camera module operating at –40°C to +105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100-compliant point-of-load converter with PGOOD sequencing and thermal monitoring for functional safety compliance. Use Value: Integrated temperature sensing and 1µA shutdown current extend battery life in always-on vision systems while meeting ISO 26262 ASIL-B diagnostic coverage requirements. |
| Industrial PLC I/O Module | 5G Baseband Processor Supply |
Use Scenario: Delivering 10A at 1.0V to ARM-based PLC controller with strict EMC limits in factory floor environments. IC Role / Device Role / Timing Role: Low-EMI DC/DC converter synchronized to system clock via MODE/SYNC to avoid spectral interference with analog sensor interfaces. Use Value: CISPR 25 Class 5 compliance achieved without ferrite beads or shielding-reducing BOM cost and board area by eliminating EMI filter components. |
Use Scenario: Powering 5G NR baseband ASIC requiring 1.0V at up to 10A with <50ns load-step response and minimal voltage droop. IC Role / Device Role / Timing Role: High-bandwidth current-mode regulator with 5MHz max fSW and 18A peak switch limit-supporting aggressive dynamic voltage scaling. Use Value: 4.5mΩ NMOS RDS(ON) and forced CCM mode deliver >92% efficiency at 3.3VIN/1.0VOUT, cutting thermal load by 1.8W vs. discrete MOSFET solutions. |
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 |
|---|---|---|---|
| MP2964GQKT-Z | Fixed 1.0V output, 12A rating, 2.7–16V input, no integrated AVP or Silent Switcher EMI mitigation | Targets higher-input industrial systems; lacks automotive qualification and remote sense capability | Select when input exceeds 5.5V or >10A peak current is needed; verify EMI filtering for automotive use. |
| TPS546D24RQFT | Adjustable 0.5–2.0V output, 10A, 3–16V input, PMBus interface, no integrated AVP or Silent Switcher | Designed for digitally managed server POL; requires external feedback resistors and telemetry components | Choose for systems needing real-time telemetry, margining, or dynamic voltage scaling-adds complexity but enables closed-loop system control. |
Compared with MP2964GQKT-Z and TPS546D24RQFT, the LTC3310SEV-1#WPBF delivers superior EMI performance in compact 3mm × 3mm footprint, automotive-grade reliability out-of-box, and simplified fixed-output design-making it optimal for space-constrained, noise-sensitive, and safety-critical applications where minimal external components are prioritized.
Availability
LTC3310SEV-1#WPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS modules, and industrial PLC I/O requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LTC3310SEV-1#WPBF 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 industrial, automotive, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The LTC3310S family was designed specifically for high-efficiency, low-EMI point-of-load conversion in space-constrained digital systems-emphasizing silent operation, fast transient response, and robust protection for FPGA, ASIC, and microprocessor core supplies.
FAQ
What is the output voltage tolerance of the LTC3310SEV-1#WPBF over temperature and line?
The LTC3310SEV-1#WPBF guarantees ±1% output voltage accuracy over its full –40°C to +125°C junction temperature range and across 2.25V–5.5V input voltage, measured with remote sense (AGND) connection. This specification includes initial tolerance, line regulation (0.025%/V), and load regulation effects-ensuring stable 1.0V operation for sensitive digital loads without calibration.
Does the LTC3310SEV-1#WPBF require external feedback resistors?
No, the LTC3310SEV-1#WPBF does not require external feedback resistors because it integrates the resistor divider for its fixed 1.0V output. Pin 18 functions as VOUT-not FB-on this variant, connecting internally to the 1.0V tap. This eliminates two external components and associated layout sensitivity, simplifying design and improving accuracy versus adjustable variants like LTC3310SEV#WPBF.
How does the Silent Switcher 2 architecture in the LTC3310SEV-1#WPBF reduce EMI?
The LTC3310SEV-1#WPBF integrates internal bypass capacitors between VIN and PGND, and VIN and AGND, minimizing high-di/dt loop area. Combined with symmetrical SW pin layout and matched internal power paths, this reduces magnetic field coupling and common-mode noise-achieving CISPR 25 Class 5 radiated emissions compliance without external EMI filters, even at 5MHz switching frequency.
Can the LTC3310SEV-1#WPBF be synchronized to an external clock?
Yes, the LTC3310SEV-1#WPBF supports synchronization via its MODE/SYNC pin, accepting external square-wave clocks from 0.5MHz to 2.25MHz. When synchronized, it locks top-switch turn-on to the rising edge of the input clock, automatically adjusts slope compensation, and operates in pulse-skip mode-enabling deterministic timing and reduced beat frequencies in multi-rail systems.
What thermal management features does the LTC3310SEV-1#WPBF provide?
The LTC3310SEV-1#WPBF includes die temperature monitoring via the SSTT pin (4mV/°C), thermal shutdown protection, and a thermally enhanced 3mm × 3mm LQFN package with exposed PGND pad. The SSTT pin also enables automatic soft-start re-initiation during thermal fault recovery-ensuring safe restart after overheating without external circuitry.
LTC3310SEV-1#WPBF 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:
- 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:
- 10A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310SEV-1#WPBF FAQ
1.How can I place an order for LTC3310SEV-1#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV-1#WPBF 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#WPBF reliable?
The price and inventory of LTC3310SEV-1#WPBF 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#WPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV-1#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV-1#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV-1#WPBF?
LTC3310SEV-1#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV-1#WPBF 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#WPBF?
For technical support, including LTC3310SEV-1#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV-1#WPBF requirements.
6.How does Aetrix verify that LTC3310SEV-1#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV-1#WPBF 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#WPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV-1#WPBF?
All LTC3310SEV-1#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV-1#WPBF, 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#WPBF part is unused and in its original packaging.
Return procedure for LTC3310SEV-1#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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