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Analog Devices Inc. LTC3310SIV-1#WTRPBF
- Part No.:
- LTC3310SIV-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SIV-1#WTRPBF.pdf
- Description:
- IC REG BUCK 1V 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,369
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Product details
Overview
LTC3310SIV-1#WTRPBF from Analog Devices is a monolithic, AEC-Q100 qualified, 10A synchronous step-down DC/DC converter in Silent Switcher 2 architecture. It operates from 2.25V to 5.5V input, delivers fixed 1.0V output with ±1% accuracy (remote sense), supports up to 5MHz switching frequency, and integrates internal hot-loop bypass capacitors for ultralow EMI-designed for automotive core power in ADAS ECUs and infotainment SoC supplies.
For engineers reviewing the LTC3310SIV-1#WTRPBF datasheet, LTC3310SIV-1#WTRPBF pinout, LTC3310SIV-1#WTRPBF application, or LTC3310SIV-1#WTRPBF equivalent, key selection criteria include its fixed 1V output, 3mm × 3mm LQFN thermal performance (θJCbottom = 9°C/W), AEC-Q100 Grade I (–40°C to +125°C), integrated AVP for transient optimization, and PGOOD with 97–99% VOUT threshold hysteresis.
Technical Context
The LTC3310SIV-1#WTRPBF employs constant-frequency peak current mode control with a 500mV internal reference (adjusted to 1.0V via internal resistor divider) and 35ns minimum on-time for high VIN/VOUT ratios. Its Silent Switcher 2 architecture embeds VIN-to-PGND and VIN-to-AGND bypass capacitors, enabling clean 2MHz operation with <30dBµV/m CISPR25 Class 5 radiated emissions at 7.5A.
It features dual current limiting: top switch limit of 14.5–18.5A and bottom switch valley limit (IVALLEYMAX) of 10–14A, plus active voltage positioning (1.7–3.1mV/A droop) for FPGA/ASIC core rails. MODE/SYNC supports multiphase paralleling, external clock sync (0.5–2.25MHz), or forced continuous/pulse-skip mode selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, automotive 3.3V/5V rails, and intermediate bus architectures. |
| VOUT | Fixed 1.000V ±1% (remote sense) - eliminates external feedback resistors; enables precise core supply for 1V-tolerant processors. |
| Output Current | 10A continuous - sustains full load without derating at Tj ≤ 125°C in 3mm × 3mm LQFN with exposed PGND pad. |
| Switching Frequency | Programmable 0.5–5MHz (RT-pin) - allows optimization of size vs. efficiency; default 2MHz with RT=274kΩ. |
| Efficiency | Up to 95% at 3.3V→1.0V/10A - enabled by 4.5mΩ NMOS and 16mΩ PMOS RDS(ON) and Silent Switcher 2 low-loss layout. |
| PGOOD Threshold | 97–99% of regulated VOUT with 0.5–1.5% hysteresis - ensures reliable power sequencing and fault detection in automotive systems. |
| Shutdown Current | 1µA - meets automotive "always-on" low-power requirements during sleep modes. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJCbottom = 9°C/W, rated for –40°C to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control with precision threshold | 400mV rising threshold with 60mV hysteresis; direct VIN tie disables shutdown; critical for automotive wake-up sequencing. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; compensates up to ±100mV PCB ground offset for accurate 1V regulation. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce IR drop and inductance; must be shorted and bypassed locally to PGND for Silent Switcher 2 integrity. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal path; requires ≥6 thermal vias to inner ground plane. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins minimize loop inductance; connect directly to inductor with wide copper pour for EMI control. |
| MODE/SYNC (13) | Multi-phase sync or mode control | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock; selects pulse-skip vs. forced continuous mode. |
| PGOOD (14) | Open-drain power-good indicator | Active-low signal asserts when VOUT is within 97–99% of 1.0V; 100µs delay filters noise; pulls down during UVLO or fault. |
| RT (15) | Oscillator frequency programming | Resistor to AGND sets fSW from 0.5–5MHz; also configures phase offset in multi-phase setups. |
| SSTT (16) | Soft-start/track/temperature monitor | 10µA current charges external cap for controlled ramp; transitions to die temp monitor (4mV/°C) post-startup; initiates soft-restart on short-circuit recovery. |
| ITH (17) | Loop compensation node | Connects Type II/III compensation network to AGND; sets bandwidth and phase margin for fast transient response. |
| FB/VOUT (18) | Feedback input / fixed-output sense | On LTC3310SIV-1#WTRPBF: internal 1V divider replaces FB; pin functions as VOUT sense for remote monitoring and AVP calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors eliminate external high-frequency ceramic placement errors and reduce radiated EMI by >20dB vs. SS1. |
| AEC-Q100 Qualified (Grade I) | Validated for automotive use from –40°C to +125°C junction; includes production flow, HTOL, and ESD testing per AEC standards. |
| Active Voltage Positioning (AVP) | 1.7–3.1mV/A load-dependent droop on LTC3310S-1 variants improves transient response and reduces required bulk capacitance by up to 30%. |
| Configurable Multi-Phase Operation | MODE/SYNC pin enables seamless paralleling of up to 4 converters with interleaved clocks, reducing input/output ripple and thermal stress. |
| Dual Current Limit Protection | Peak (14.5–18.5A) and valley (10–14A) current limits prevent inductor saturation and MOSFET overstress during overload and short-circuit events. |
Applications
| Automotive ADAS Camera Module Power | Industrial FPGA Core Supply |
|---|---|
Use Scenario: Powers image sensor and ISP SoC in 77GHz radar or surround-view camera ECU under cold-crank (2.25V) and load dump (5.5V) conditions. IC Role / Device Role / Timing Role: Primary 1V core regulator with PGOOD sequencing, AVP for dynamic load steps, and thermal monitoring via SSTT pin. Use Value: Maintains ±1% 1V accuracy across –40°C to +125°C while meeting CISPR25 Class 5 EMI limits without external filters-reducing BOM cost and board area. | Use Scenario: Delivers 10A at 1.0V to Xilinx Zynq Ultrascale+ FPGA fabric under burst-mode logic switching (10A/µs di/dt). IC Role / Device Role / Timing Role: High-bandwidth current-mode controller with 35ns min-on-time and programmable 2MHz switching for optimal transient suppression. Use Value: Achieves <20mV undershoot/overshoot with 1A/µs load step due to fast current loop and AVP; eliminates need for additional polymer caps. |
| Telecom POL for Baseband Processor | Medical Imaging ASIC Supply |
Use Scenario: Point-of-load regulator in 5G small cell RU, powered from 3.3V intermediate bus, supplying 1V to baseband processor with strict EMI limits. IC Role / Device Role / Timing Role: Synchronized multi-phase buck with MODE/SYNC pin locked to system clock to avoid beat frequencies in dense RF environments. Use Value: Enables deterministic 2MHz operation across multiple converters, reducing conducted noise peaks by >15dB and simplifying EMC pre-compliance testing. | Use Scenario: Powers low-noise analog front-end ASIC in portable ultrasound device requiring ultra-stable 1V rail and zero audible noise. IC Role / Device Role / Timing Role: Forced continuous mode operation with Silent Switcher 2 minimizes switching frequency harmonics in sensitive analog bands. Use Value: Delivers <10µVRMS output ripple at 10A with no audible coil whine-critical for FDA Class II medical device certification. |
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 |
|---|---|---|---|
| MP2964GQ-Z | Fixed 1V output, 12A rating, 2.5–5.5V VIN, but lacks Silent Switcher EMI mitigation and AVP; uses external compensation. | Targeted at cost-sensitive industrial computing, not automotive-grade EMI or thermal environments. | Select MP2964GQ-Z only if AEC-Q100 qualification and CISPR25 compliance are unnecessary and higher current headroom is prioritized. |
| TPS546D24RQFT | PMBus-enabled, 10A, 2.95–16V VIN, programmable VOUT; larger 4mm × 4mm QFN, no integrated AVP or Silent Switcher. | Designed for data center VR13/VR14 compliance and telemetry-not for space-constrained automotive modules. | Choose TPS546D24RQFT when digital monitoring, margining, and wide-input flexibility outweigh EMI and footprint constraints. |
Compared with MP2964GQ-Z and TPS546D24RQFT, the LTC3310SIV-1#WTRPBF uniquely combines AEC-Q100 qualification, ultralow EMI via Silent Switcher 2, fixed 1V accuracy with AVP, and 3mm × 3mm footprint-making it the only option for safety-critical automotive 1V core supplies where board space, thermal density, and regulatory EMI margins are simultaneously constrained.
Availability
LTC3310SIV-1#WTRPBF is available at Aetrix Electronics and suitable for automotive ADAS systems, industrial FPGA power delivery, and telecom point-of-load applications requiring stable component supply, AEC-Q100 traceability, and long-term lifecycle support.
Supply support for LTC3310SIV-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC3310S/LTC3310S-1 product line was designed specifically for high-density, low-EMI, automotive-qualified DC/DC conversion-addressing the demand for compact, robust, and EMI-compliant core supplies in next-generation ADAS and infotainment systems.
FAQ
What is the operating temperature range for the LTC3310SIV-1#WTRPBF?
The LTC3310SIV-1#WTRPBF is rated for –40°C to +125°C junction temperature and is AEC-Q100 qualified for automotive Grade I applications. Its thermal design leverages the 3mm × 3mm LQFN's low θJCbottom (9°C/W) and exposed PGND pad to sustain 10A continuous output within this range when properly mounted on a 4-layer PCB with ≥6 thermal vias.
Does the LTC3310SIV-1#WTRPBF require external feedback resistors?
No. The LTC3310SIV-1#WTRPBF has an internal resistor divider that fixes the output to 1.000V ±1%, eliminating external FB resistors. Pin 18 functions as VOUT sense-not FB-enabling remote sensing and Active Voltage Positioning calibration without external components.
How does the Silent Switcher 2 architecture improve EMI performance in the LTC3310SIV-1#WTRPBF?
The LTC3310SIV-1#WTRPBF integrates internal hot-loop bypass capacitors between VIN–PGND and VIN–AGND, minimizing high-di/dt loop area and eliminating placement sensitivity. This achieves <30dBµV/m radiated emissions in CISPR25 Class 5 tests-enabling compliance without external EMI filters in most automotive layouts.
Can the LTC3310SIV-1#WTRPBF be synchronized to an external clock?
Yes. The MODE/SYNC pin on the LTC3310SIV-1#WTRPBF accepts an external square wave (0.5–2.25MHz) to synchronize switching frequency, enabling deterministic noise spectra and multi-phase interleaving. During sync, it automatically adapts slope compensation and operates in pulse-skip mode for optimal light-load efficiency.
What protection features are included in the LTC3310SIV-1#WTRPBF?
The LTC3310SIV-1#WTRPBF includes comprehensive protection: output overvoltage (106–112.5% VOUT), undervoltage lockout (2.0–2.2V), thermal shutdown, output short-circuit recovery with soft-start reinitiation, PGOOD fault reporting, and dual current limiting (peak and valley) to safeguard both IC and external magnetics under fault conditions.
LTC3310SIV-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)
LTC3310SIV-1#WTRPBF FAQ
1.How can I place an order for LTC3310SIV-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SIV-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 LTC3310SIV-1#WTRPBF reliable?
The price and inventory of LTC3310SIV-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 LTC3310SIV-1#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SIV-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SIV-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SIV-1#WTRPBF?
LTC3310SIV-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SIV-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 LTC3310SIV-1#WTRPBF?
For technical support, including LTC3310SIV-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SIV-1#WTRPBF requirements.
6.How does Aetrix verify that LTC3310SIV-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SIV-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 LTC3310SIV-1#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SIV-1#WTRPBF?
All LTC3310SIV-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SIV-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 LTC3310SIV-1#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3310SIV-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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