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Analog Devices Inc. LTC3310SIV#WTRMPBF
- Part No.:
- LTC3310SIV#WTRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SIV#WTRMPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:380
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Product details
Overview
LTC3310SIV#WTRMPBF 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, featuring 500mV feedback reference, 35ns minimum on-time, and ±1% VOUT accuracy with remote sense. It operates in automotive-grade temperature range (–40°C to 125°C) and targets FPGA, ASIC, and µP core supplies requiring low EMI and high efficiency.
For engineers reviewing the LTC3310SIV#WTRMPBF datasheet, LTC3310SIV#WTRMPBF pinout, LTC3310SIV#WTRMPBF application, or LTC3310SIV#WTRMPBF equivalent, key selection criteria include its 18-lead 3mm × 3mm LQFN package, programmable switching frequency up to 5MHz, precision 400mV enable threshold, power good signal, and thermal monitoring capability for robust POL deployment.
Technical Context
The LTC3310SIV#WTRMPBF employs constant-frequency peak current mode control with internal hot-loop bypass capacitors for ultralow EMI emissions per CISPR25 Class 5. Its dual MOSFET power stage features 4.5mΩ NMOS and 16mΩ PMOS RDS(ON), enabling high efficiency at 2MHz switching with forced continuous or pulse-skipping operation.
It supports multiphase parallel operation via MODE/SYNC pin, offers 100% duty cycle dropout capability, and integrates active voltage positioning only in -1 variants-this part (LTC3310S) uses adjustable output via external FB divider and lacks AVP. Remote sensing through AGND ensures ±100mV ground offset tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables sub-1V core supplies for advanced processors and FPGAs. |
| Output Accuracy | ±1% with remote sense - maintains tight regulation despite PCB trace resistance between IC and load. |
| Switching Frequency | Programmable 0.5MHz–5MHz - allows optimization of size vs. efficiency; default 2MHz with RT=274kΩ. |
| Top/Bottom RDS(ON) | 16mΩ / 4.5mΩ - reduces conduction loss at 10A, enabling >90% efficiency at mid-load with 3.3V→1.2V conversion. |
| Min On-Time | 35ns - supports high step-down ratios (e.g., 5V→0.5V) at 5MHz without pulse skipping. |
| Shutdown Current | 1µA - minimizes battery drain in always-on systems during deep sleep modes. |
Pinout & Package
Thermally enhanced 18-lead 3mm × 3mm LQFN package with exposed PGND pad (Pin 19) requiring solder connection to PCB ground plane for optimal thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input with precision threshold | 400mV rising threshold with 60mV hysteresis; direct tie-to-VIN enables device; resistor divider enables UVLO programming. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; rejects up to ±100mV PCB ground offset for accurate VOUT 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 with low-ESR ceramics. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal path; requires multiple vias to inner ground planes. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins minimize loop inductance; connect directly to inductor with wide, short copper traces. |
| MODE/SYNC (13) | Frequency control interface | 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 | Asserts high when VOUT is within 97–99% of target; 100µs delay filters transient dips; sinks 5mA max. |
| RT (15) | Oscillator frequency set | Resistor to AGND sets fSW from 0.5–5MHz; also configures phase offset in multiphase setups. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current charges external cap for controlled ramp; tracks FB during startup; outputs ~4mV/°C temp voltage post-startup. |
| ITH (17) | Loop compensation node | Connect RC network to AGND for Type II/III compensation; sets bandwidth and phase margin of current-mode loop. |
| FB (18) | Feedback input (adjustable version) | Regulated to 500mV; connects to resistive divider from VOUT; enables precise output setting from 0.5V upward. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors eliminate external high-frequency ceramic placement sensitivity and reduce radiated EMI by >30dB vs. SS1. |
| 10A continuous output capability | Thermally optimized LQFN package with θJCbottom = 9°C/W enables full 10A operation at 125°C junction without derating in typical 4-layer PCB layouts. |
| Fast transient response | Peak current mode control with 35ns min on-time delivers <50µs recovery from 1A→9A load steps while maintaining <20mV VOUT deviation. |
| Robust protection suite | Includes output overvoltage lockout (106–112.5% VOUT), thermal shutdown, valley current limiting (10–14A), and short-circuit soft-restart via SSTT pin pull-down. |
| AEC-Q100 qualified | Automotive-grade variant (indicated by #W suffix) meets AEC-Q100 Grade I (–40°C to +125°C) reliability and stress testing requirements for infotainment and ADAS power rails. |
Applications
| High-Speed Processor Core Supply | FPGA/ASIC Point-of-Load |
|---|---|
Use Scenario: Powering ARM Cortex-A78 or Xilinx Versal AI Core with dynamic current demands from 0.5A to 10A at 0.8V–1.2V. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise core voltage with fast load-step response. Use Value: 35ns minimum on-time and peak current mode control ensure stable regulation during 1A/µs transients; ±1% accuracy maintains timing margins across voltage corners. | Use Scenario: Delivering 1.0V/8A to Xilinx Kria KV260 SoM under burst-mode compute workloads with strict ripple limits (<15mV). IC Role / Device Role / Timing Role: High-efficiency POL converter operating at 2MHz to minimize inductor size while meeting CISPR25 Class 5 EMI limits. Use Value: Silent Switcher 2 architecture achieves <30dB lower radiated emissions than SS1 alternatives, eliminating need for external EMI filters in compact enclosures. |
| Automotive Infotainment System | Industrial Edge AI Module |
Use Scenario: Supplying 1.8V/6A to Qualcomm SA8155P processor in head-unit design with 12V battery input and cold-crank down to 4.5V. IC Role / Device Role / Timing Role: Automotive-qualified DC/DC converter handling wide VIN range and load transients while meeting AEC-Q100 reliability standards. Use Value: 2.25V minimum VIN enables operation during cranking; AEC-Q100 qualification ensures 15-year field life in harsh thermal/vibration environments. | Use Scenario: Providing 0.9V/10A to NVIDIA Jetson Orin NX module in factory-floor vision system with 24V industrial rail and thermal constraints. IC Role / Device Role / Timing Role: High-current, thermally efficient buck converter mounted on compact 4-layer PCB with limited heatsinking. Use Value: Exposed PGND pad and θJCbottom = 9°C/W allow full 10A delivery at 125°C junction without fan cooling, reducing system BOM cost and footprint. |
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 |
|---|---|---|---|
| MP2965GQ-Z | 4.5V–16V VIN range; 12A rating; no integrated hot-loop caps; requires external bootstrap capacitor. | Better suited for higher-input industrial rails; lacks Silent Switcher 2 EMI performance and automotive qualification. | Select when input exceeds 5.5V or higher current (>10A) is needed; avoid if CISPR25 compliance or AEC-Q100 is required. |
| TPS546D24RQFT | 4.5V–18V VIN; 60A multi-phase capable; PMBus interface; larger 6mm × 6mm QFN package. | Targets server VR13/VR14 applications with digital control; over-specified for single-chip 10A POL use cases. | Choose for digitally managed, high-current systems needing telemetry; not cost- or size-competitive for standalone 10A FPGA core supply. |
Compared with MP2965GQ-Z and TPS546D24RQFT, the LTC3310SIV#WTRMPBF delivers superior EMI performance in minimal 3mm × 3mm footprint, supports lower VIN (2.25V), and is AEC-Q100 qualified-making it optimal for space-constrained, noise-sensitive, automotive-grade 10A POL designs where analog control suffices.
Availability
LTC3310SIV#WTRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive infotainment systems, and industrial edge AI modules requiring stable component supply, automotive-grade reliability, and low-EMI power conversion.
Supply support for LTC3310SIV#WTRMPBF 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 precision instrumentation, communications, and industrial markets.
The LTC3310SIV#WTRMPBF belongs to the Silent Switcher® family of high-efficiency, low-EMI DC/DC converters designed specifically for noise-sensitive, space-constrained point-of-load applications in automotive, computing, and communications infrastructure.
FAQ
What is the maximum output current supported by the LTC3310SIV#WTRMPBF?
The LTC3310SIV#WTRMPBF supports up to 10A continuous output current under typical thermal conditions (4-layer PCB, 2oz copper, adequate airflow). Its 4.5mΩ bottom switch RDS(ON) and 16mΩ top switch RDS(ON), combined with θJCbottom = 9°C/W, enable full-rated current delivery at 125°C junction temperature without derating in properly laid-out designs.
Does the LTC3310SIV#WTRMPBF support synchronization to an external clock?
Yes, the LTC3310SIV#WTRMPBF supports external clock synchronization via the MODE/SYNC pin. Applying a square wave (0.5MHz–2.25MHz) to this pin locks the internal oscillator to the external source using an integrated PLL, enabling deterministic switching and reduced beat frequencies in multi-rail systems. The device automatically adapts slope compensation and enters pulse-skip mode during sync.
How does the LTC3310SIV#WTRMPBF achieve low EMI performance?
The LTC3310SIV#WTRMPBF achieves low EMI through Silent Switcher 2 architecture: integrated VIN–PGND and VIN–AGND bypass capacitors minimize high-di/dt loop area, while symmetrical layout and differential SW node routing cancel magnetic fields. Radiated emissions meet CISPR25 Class 5 limits without external filters, as verified on DC2629A demo board at 7.5A output.
What is the function of the SSTT pin on the LTC3310SIV#WTRMPBF?
The SSTT pin on the LTC3310SIV#WTRMPBF serves three functions: (1) Soft-start-10µA current charges an external capacitor to control VOUT ramp rate; (2) Tracking-FB follows SSTT voltage during startup for supply sequencing; (3) Temperature monitoring-outputs ~4mV/°C after startup, enabling die junction temperature readback without additional sensors.
Is the LTC3310SIV#WTRMPBF qualified for automotive applications?
Yes, the LTC3310SIV#WTRMPBF is AEC-Q100 qualified for automotive applications (Grade I, –40°C to +125°C). The "#W" in the part number denotes controlled manufacturing for automotive reliability, including extended temperature validation, enhanced ESD robustness, and failure analysis per AEC standards-making it suitable for infotainment, ADAS, and body electronics power rails.
LTC3310SIV#WTRMPBF 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:
- 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)
LTC3310SIV#WTRMPBF FAQ
1.How can I place an order for LTC3310SIV#WTRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SIV#WTRMPBF 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#WTRMPBF reliable?
The price and inventory of LTC3310SIV#WTRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310SIV#WTRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SIV#WTRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SIV#WTRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SIV#WTRMPBF?
LTC3310SIV#WTRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SIV#WTRMPBF 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#WTRMPBF?
For technical support, including LTC3310SIV#WTRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SIV#WTRMPBF requirements.
6.How does Aetrix verify that LTC3310SIV#WTRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SIV#WTRMPBF 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#WTRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SIV#WTRMPBF?
All LTC3310SIV#WTRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SIV#WTRMPBF, 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#WTRMPBF part is unused and in its original packaging.
Return procedure for LTC3310SIV#WTRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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