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Analog Devices Inc. LTC3310SEV-1#WTRPBF
- Part No.:
- LTC3310SEV-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV-1#WTRPBF.pdf
- Description:
- IC REG BUCK 1V 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,192
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Product details
Overview
LTC3310SEV-1#WTRPBF 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 integrated hot-loop bypass capacitors for ultralow EMI. It operates at up to 5MHz switching frequency, supports multiphase paralleling, and is AEC-Q100 qualified for automotive power rails.
For engineers reviewing the LTC3310SEV-1#WTRPBF datasheet, LTC3310SEV-1#WTRPBF pinout, LTC3310SEV-1#WTRPBF application, or LTC3310SEV-1#WTRPBF equivalent, key selection criteria include its fixed 1V output with Active Voltage Positioning (AVP), 35ns minimum on-time, 4.5mΩ NMOS/16mΩ PMOS RDS(ON), thermal monitoring via SSTT pin, and compatibility with high-density POL designs requiring low EMI and fast transient response.
Technical Context
The LTC3310SEV-1#WTRPBF employs constant-frequency peak current mode control with internal 500mV reference (for adjustable variants) and fixed 1.0V regulation (for -1 variants), enabling precise load-line control via AVP. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors, eliminating external high-frequency ceramic caps required in first-gen Silent Switcher parts.
It features dual current limiting: top-switch peak limit (14.5–18.5A) and bottom-switch valley limit (10–14A), programmable frequency via RT pin (0.5–5MHz), and MODE/SYNC pin supporting synchronization, clock output, or pulse-skip/forced-continuous mode selection - all while maintaining 100% duty cycle capability for ultra-low dropout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.000V ±1% (with remote sense); enables direct core supply for 1V logic without external feedback divider. |
| IOUT Max | 10A continuous output current; supports high-current FPGA/ASIC core rails with minimal thermal derating in 3mm × 3mm LQFN. |
| 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 resistor; allows optimization of size (high fSW) vs. efficiency (low fSW). |
| RDS(ON) | 4.5mΩ (NMOS) / 16mΩ (PMOS); reduces conduction loss and improves full-load efficiency (>90% at 10A, 3.3V→1V). |
| Min On-Time | 35ns typical; enables high step-down ratios (e.g., 5V→1V at 2MHz) without pulse skipping at light loads. |
| Shutdown IQ | 1µA max; critical for battery-backed systems requiring ultra-low quiescent current during sleep modes. |
| Temp Range | –40°C to +125°C junction; validated for automotive under-hood and industrial edge computing applications. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, thermally enhanced for high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input with precision threshold | 400mV rising threshold with 60mV hysteresis; supports accurate input UVLO programming or direct VIN tie. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; rejects up to ±100mV PCB ground offset for ±1% VOUT accuracy. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce trace resistance/inductance; must be shorted and bypassed locally to PGND. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad; primary thermal path; requires large copper pour and multiple vias to internal ground plane. |
| SW (6–9) | Switch node output | Four parallel SW pins minimize loop inductance; connect directly to inductor with wide, low-inductance traces. |
| MODE/SYNC (13) | Multi-phase sync & mode control | Configures pulse-skip/forced-continuous mode or synchronizes to external clock (0.5–2.25MHz input range). |
| PGOOD (14) | Open-drain power-good indicator | Asserts high when VOUT is within 97–99% of nominal; includes 100µs delay to reject transient glitches. |
| RT (15) | Oscillator frequency set | Resistor to AGND sets fSW; 274kΩ yields ~2MHz default; enables precise timing control across temperature. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current source for soft-start capacitor; transitions to die temperature monitor (4mV/°C) after startup. |
| ITH (17) | Current limit and loop compensation | Compensation node for error amplifier; connects to AGND via RC network to stabilize voltage loop. |
| FB/VOUT (18) | Feedback input / fixed-output sense | For LTC3310SEV-1#WTRPBF: internally connected to 1.0V regulator; no external divider needed. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors eliminate need for external high-frequency ceramics, reducing EMI by >30dB vs. SS1 and simplifying layout. |
| Active Voltage Positioning (AVP) | Output voltage varies linearly with load current (1.7–3.1mV/A slope); lowers light-load VOUT to improve transient headroom and reduce bulk capacitance requirements. |
| Thermally Enhanced LQFN | 3mm × 3mm package with exposed PGND pad achieves θJCbottom = 9°C/W; enables 10A operation without heatsink in 1-layer thermal pads. |
| Robust Protection Suite | Includes output overvoltage (106–112.5% VOUT trip), thermal shutdown, short-circuit recovery via SSTT-triggered soft-start, and valley-current limiting to prevent inductor saturation. |
| AEC-Q100 Qualified | Automotive-grade reliability (Grade 1: –40°C to +125°C), with controlled manufacturing, stress testing, and failure analysis reports available per ADI automotive program. |
| Multiphase Paralleling Support | MODE/SYNC pin enables seamless n-phase interleaving with <10ns phase skew; scales output current beyond 10A while reducing input/output ripple. |
Applications
| Automotive ADAS Power Rail | Industrial FPGA Core Supply |
|---|---|
|
Use Scenario: Powering vision processor SoCs (e.g., NVIDIA DRIVE Orin) in camera modules requiring stable 1V @ 8A with low EMI to avoid image sensor interference. IC Role / Device Role / Timing Role: Primary POL regulator delivering regulated 1.0V with AVP for dynamic load-line control during AI inference bursts. Use Value: Silent Switcher 2 ensures CISPR-25 Class 5 compliance without shielding; 35ns min on-time maintains regulation during rapid 0→8A transients. |
Use Scenario: Supplying Xilinx Kria KV260 adaptive compute SOM with tight 1V ±1% tolerance and fast load-step response. IC Role / Device Role / Timing Role: High-efficiency buck converter operating at 3MHz to minimize inductor size while maintaining <20mV output deviation. Use Value: Integrated hot-loop caps reduce BOM count; PGOOD and die temp monitor enable system-level health reporting and thermal throttling. |
| 5G Baseband Radio PSU | Server ASIC Memory Interface |
|
Use Scenario: Generating 1V supply for mmWave RF transceivers where switching noise must not degrade EVM or ACLR performance. IC Role / Device Role / Timing Role: Low-noise POL regulator synchronized to baseband clock via MODE/SYNC to avoid beat frequencies. Use Value: 5MHz max fSW places noise above sensitive IF bands; <10mVPP output ripple ensures clean analog biasing. |
Use Scenario: Powering DDR5 memory controller I/O banks requiring fast transient response and precise voltage positioning. IC Role / Device Role / Timing Role: AVP-enabled buck supplying 1.0V with load-dependent droop to counteract IR drop across package and interconnect. Use Value: 1.7–3.1mV/A AVP slope matches typical memory rail load-line specs; eliminates need for external DAC-based compensation. |
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 input, 10A, fixed 1V option; uses D-CAP3 control (no external compensation); no integrated hot-loop caps; 2.5mm × 2.5mm QFN. | Lacks Silent Switcher 2 EMI performance; requires external input filter for automotive CISPR-25; smaller footprint but higher thermal resistance. | Select if board space is constrained and EMI filtering can be added externally; avoid where radiated emissions must meet Class 5 without filters. |
| MPM3695-100 | 5.5V input, 10A, fixed 1V; integrated inductor; 4mm × 4mm module; no AVP; 1.2MHz fixed fSW. | Higher solution height (5.8mm); lower efficiency at 5MHz due to fixed frequency; no multiphase support or thermal monitoring pin. | Select for fastest time-to-market with minimal layout effort; avoid when thermal telemetry, EMI-sensitive environments, or multi-phase scaling are required. |
Compared with TPS546D24A and MPM3695-100, the LTC3310SEV-1#WTRPBF uniquely combines AEC-Q100 qualification, Silent Switcher 2 EMI suppression, AVP for memory rail compliance, and a thermally optimized 3mm × 3mm LQFN-making it optimal for space-constrained, high-reliability automotive and industrial POL applications where system-level noise and thermal management are critical.
Availability
LTC3310SEV-1#WTRPBF is available at Aetrix Electronics and suitable for automotive ADAS power rails, industrial FPGA core supplies, and 5G baseband radio PSUs requiring stable component supply, AEC-Q100 compliance, and ultralow EMI performance.
Supply support for LTC3310SEV-1#WTRPBF 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 (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC3310SEV-1#WTRPBF belongs to ADI's Power by Linear™ family of high-efficiency, low-EMI DC/DC converters designed specifically for demanding automotive, industrial, and infrastructure applications where reliability, thermal performance, and electromagnetic compatibility are non-negotiable.
FAQ
What is the output voltage accuracy of the LTC3310SEV-1#WTRPBF over temperature and line/load conditions?
The LTC3310SEV-1#WTRPBF delivers ±1% output voltage accuracy over the full –40°C to +125°C junction temperature range, with remote sensing enabled. This specification includes line regulation (0.025%/V), load regulation (±1.5mV at 10A), and initial tolerance - verified across production lots and guaranteed by design for automotive-grade operation.
Does the LTC3310SEV-1#WTRPBF require external feedback resistors to set the 1V output?
No. The LTC3310SEV-1#WTRPBF has an internally trimmed 1.000V reference and fixed feedback network; Pin 18 (FB/VOUT) connects directly to the output without external resistors. This eliminates resistor tolerance errors and saves PCB area versus adjustable variants like the LTC3310SEV#WTRPBF.
How does the Active Voltage Positioning (AVP) function work in the LTC3310SEV-1#WTRPBF?
In the LTC3310SEV-1#WTRPBF, AVP dynamically adjusts VOUT based on load current: VOUT = 1.0V – (1.7–3.1mV/A) × ILOAD. This intentional droop improves transient response headroom and reduces required output capacitance - especially valuable for DDR memory and high-speed logic rails.
Can the LTC3310SEV-1#WTRPBF be synchronized to an external clock, and what is the supported frequency range?
Yes. The MODE/SYNC pin accepts an external square wave clock from 0.5MHz to 2.25MHz to synchronize the LTC3310SEV-1#WTRPBF's internal oscillator. During sync, the device operates in pulse-skip mode, and slope compensation automatically adapts - ensuring stable operation across the full range without manual tuning.
What thermal management features does the LTC3310SEV-1#WTRPBF provide for high-current operation?
The LTC3310SEV-1#WTRPBF includes a die temperature monitor accessible via the SSTT pin (4mV/°C), overtemperature protection that disables switching above 150°C, and a thermally enhanced 3mm × 3mm LQFN with θJCbottom = 9°C/W. These features enable real-time thermal telemetry and safe 10A operation in compact, unventilated enclosures.
LTC3310SEV-1#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 18-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310SEV-1#WTRPBF FAQ
1.How can I place an order for LTC3310SEV-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV-1#WTRPBF 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#WTRPBF reliable?
The price and inventory of LTC3310SEV-1#WTRPBF 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#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV-1#WTRPBF?
LTC3310SEV-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV-1#WTRPBF 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#WTRPBF?
For technical support, including LTC3310SEV-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV-1#WTRPBF requirements.
6.How does Aetrix verify that LTC3310SEV-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV-1#WTRPBF 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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV-1#WTRPBF?
All LTC3310SEV-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV-1#WTRPBF, 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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3310SEV-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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