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Analog Devices Inc. LTC3310SIV-1#PBF
- Part No.:
- LTC3310SIV-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SIV-1#PBF.pdf
- Description:
- IC REG BUCK 1V 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:624
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Product details
Overview
LTC3310SIV-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 over temperature, and 35ns minimum on-time. It operates in pulse-skip or forced continuous mode and integrates internal hot-loop bypass capacitors for ultralow EMI in automotive power rail applications.
For engineers reviewing the LTC3310SIV-1#PBF datasheet, LTC3310SIV-1#PBF pinout, LTC3310SIV-1#PBF application, or LTC3310SIV-1#PBF equivalent, this page provides verified package mapping (18-lead 3mm × 3mm LQFN), thermal performance data (θJCbottom = 9°C/W), real-world efficiency curves at 2MHz, confirmed AVP behavior (1.7–3.1 mV/A load-line slope), and validated AEC-Q100 qualification for under-hood use.
Technical Context
The LTC3310SIV-1#PBF implements constant-frequency peak current mode control with an internal 500mV reference (adjusted to 1.0V via integrated resistor divider) and supports synchronization via MODE/SYNC pin with 0.5–2.25MHz external clock range. Its Silent Switcher 2 architecture embeds VIN-to-PGND and VIN-to-AGND bypass capacitors, eliminating need for external high-frequency ceramics.
It features dual current limiting: top-switch limit (14.5–18.5A) and valley-bottom limit (10–14A), plus active voltage positioning (AVP) with 2.4 mV/A nominal slope, die temperature monitoring via SSTT pin (4 mV/°C), and precision enable threshold (400mV ±25mV) with 60mV hysteresis - all specified over –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.000 V ±1% with remote sense - enables precise core supply for FPGA/ASIC without external feedback resistors. |
| Output Current | 10 A continuous - supports high-current POL rails with thermal derating governed by θJCbottom = 9°C/W. |
| Input Range | 2.25 V to 5.5 V - compatible with single-cell Li-ion, 3.3V, and 5V intermediate bus systems. |
| Switching Frequency | Programmable 0.5–5 MHz (default 2 MHz with RT = 274kΩ) - allows optimization of size vs. efficiency in space-constrained designs. |
| Efficiency | Peak >95% at 3.3VIN/1.0VOUT/5A - achieved via 4.5mΩ NMOS and 16mΩ PMOS integrated power switches. |
| EMI Performance | CISPR 25 Class 5 compliant (radiated & conducted) - validated on DC2629A demo board with EMI filter, enabling automotive ECU deployment. |
| Shutdown Current | 1 µA - ensures ultra-low system standby power in always-on vehicle modules. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, θJCbottom = 9°C/W. Requires soldering exposed pad to PCB ground plane with ≥6 thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV threshold with 60mV hysteresis - enables accurate power sequencing and brown-out protection. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider - compensates for up to ±100mV PCB ground offset between IC and load. |
| VIN (3,4,11,12) | Main input power supply | Four parallel inputs reduce trace inductance and IR drop - must be shorted and bypassed locally to PGND. |
| PGND (5,10,19) | Power ground return path | Primary thermal conduction path - exposed pad (Pin 19) must be soldered to large copper area for thermal integrity. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins minimize switching loop inductance - connect directly to inductor with wide, low-inductance traces. |
| MODE/SYNC (13) | Frequency control & multiphase sync | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock - enables interleaved operation for lower ripple and higher current. |
| PGOOD (14) | Power-good open-drain output | Asserts after 100µs delay when VOUT reaches 97–99% of regulation - used for downstream power sequencing and fault reporting. |
| RT (15) | Oscillator frequency set | Resistor-to-AGND sets fSW (0.5–5MHz); open = default 2MHz - enables fine-tuning for EMI or efficiency trade-offs. |
| SSTT (16) | Soft-start / track / temp monitor | 10µA current source for soft-start capacitor; transitions to 4mV/°C temp sensor post-startup - enables thermal monitoring without extra IC. |
| ITH (17) | Loop compensation node | Connects external RC network to AGND - determines stability margin and transient response bandwidth. |
| FB/VOUT (18) | Feedback input / fixed-output sense | On LTC3310SIV-1#PBF: internally connected to 1.0V output - no external divider required; FB function disabled. |
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 and reduce radiated emissions below CISPR 25 Class 5 limits. |
| Active Voltage Positioning (AVP) | 2.4 mV/A load-line slope (LTC3310SIV-1#PBF) - lowers output voltage under full load to improve transient headroom and reduce bulk capacitance requirements. |
| Thermally enhanced LQFN | θJCbottom = 9°C/W enables 10A operation at 125°C junction with minimal heatsinking - validated for automotive under-hood environments. |
| AEC-Q100 Grade I qualification | Rated for –40°C to +125°C operating junction temperature - meets automotive reliability and stress test requirements for engine control and ADAS modules. |
| Robust protection suite | Includes output overvoltage (106–112.5% VOUT), short-circuit recovery via SSTT-triggered soft-start, thermal shutdown, and valley-current limiting to prevent inductor saturation damage. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial FPGA Core Supply |
|---|---|
Use Scenario: Powering 1.0V core rails in engine management systems exposed to under-hood temperatures up to 125°C ambient. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing stable 1.0V/10A with AEC-Q100 compliance and EMI robustness. Use Value: Eliminates need for external EMI filters and thermal derating margins due to θJCbottom = 9°C/W and integrated Silent Switcher 2 capacitors. |
Use Scenario: Delivering tightly regulated 1.0V core voltage to Xilinx Kintex or Intel Arria FPGAs in programmable logic controllers. IC Role / Device Role / Timing Role: High-bandwidth POL converter with <35ns min on-time and fast transient response for dynamic load steps. Use Value: AVP reduces required output capacitance by 30% versus fixed-VOUT regulators while maintaining <±1% regulation across 0–10A load range. |
| 5G Base Station Radio Unit (RU) | Server ASIC Memory Interface |
Use Scenario: Point-of-load conversion for RF transceiver bias supplies in outdoor small cells requiring low EMI and high reliability. IC Role / Device Role / Timing Role: Synchronized multi-phase buck controller (via MODE/SYNC) enabling interleaved operation for lower ripple and thermal spreading. Use Value: 2MHz default switching frequency allows compact 100nH inductors and 22µF ceramic output caps - reducing board area by >40% vs. 500kHz solutions. |
Use Scenario: Supplying DDR5 memory interface voltage (1.0V) in AI accelerator servers with strict noise and transient response requirements. IC Role / Device Role / Timing Role: Low-noise, high-efficiency buck converter with remote sensing (AGND) and PGOOD sequencing for memory subsystem power-up. Use Value: ±1% VOUT accuracy with remote sense maintains signal integrity across long PCB traces; PGOOD delay prevents false resets during startup. |
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 |
|---|---|---|---|
| MPM3695-100 | Fixed 1.0V output, 10A rating, but uses MPS's proprietary packaging (QFN-24) and lacks AVP; max fSW = 1.5MHz. | No integrated temperature monitoring or AEC-Q100 qualification - limited to industrial/commercial use only. | Select when cost sensitivity outweighs automotive qualification and thermal monitoring needs. |
| TPS546D24A | Adjustable output (0.5–2.0V), 10A, supports PMBus; no integrated AVP or Silent Switcher EMI mitigation. | Requires external EMI filtering and feedback resistors; designed for datacenter PSU telemetry, not automotive ECU. | Choose when digital configuration and telemetry are required, and board-level EMI design resources are available. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310SIV-1#PBF uniquely combines AEC-Q100 qualification, integrated AVP, Silent Switcher 2 EMI reduction, and die temperature monitoring in a single 3mm × 3mm LQFN - making it optimal for space-constrained, thermally demanding automotive and industrial POL applications where reliability and regulatory compliance are non-negotiable.
Availability
LTC3310SIV-1#PBF is available at Aetrix Electronics and suitable for automotive ECU power supplies, industrial FPGA core rails, 5G radio unit POL stages, and server ASIC memory interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3310SIV-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets since 1965.
The LTC3310SIV-1#PBF belongs to the Silent Switcher 2 power management product line, engineered specifically for high-current, low-EMI point-of-load conversion in safety-critical automotive and ruggedized industrial systems.
FAQ
What is the operating temperature range for the LTC3310SIV-1#PBF?
The LTC3310SIV-1#PBF is rated for –40°C to +125°C junction temperature and is qualified to AEC-Q100 Grade I standards. Its thermal resistance (θJCbottom = 9°C/W) enables reliable 10A operation within this range when the exposed PGND pad is properly soldered to a thermal plane with ≥6 vias. Derating curves in the datasheet confirm full 10A capability at 125°C ambient with appropriate airflow.
Does the LTC3310SIV-1#PBF require external feedback resistors?
No. The LTC3310SIV-1#PBF has an internally trimmed resistor divider that fixes the output to 1.000 V ±1%, so no external FB resistors are needed. Pin 18 functions as VOUT (not FB) in this variant - unlike the adjustable LTC3310S, which requires RA/RB resistors. This simplifies layout and improves accuracy by eliminating resistor tolerance and thermal drift effects.
How does Active Voltage Positioning (AVP) work in the LTC3310SIV-1#PBF?
In the LTC3310SIV-1#PBF, AVP dynamically adjusts the output voltage based on load current: it regulates ~3 mV above 1.0V at light loads and ~3 mV below 1.0V at full 10A load. This 2.4 mV/A slope improves transient response headroom and reduces required output capacitance by shifting regulation point - a feature confirmed in the Electrical Characteristics table and Figure G03 of the datasheet.
Can the LTC3310SIV-1#PBF be synchronized to an external clock?
Yes. The MODE/SYNC pin (Pin 13) accepts external square-wave clocks from 0.5 MHz to 2.25 MHz, locking the internal oscillator's rising edge to the input signal. During synchronization, the LTC3310SIV-1#PBF operates in pulse-skip mode and automatically adapts slope compensation. Clock removal is detected within 20 µs, after which the device returns to its default 2 MHz frequency.
What protection features are built into the LTC3310SIV-1#PBF?
The LTC3310SIV-1#PBF includes output overvoltage protection (106–112.5% VOUT), output short-circuit recovery via SSTT-triggered soft-start, thermal shutdown, valley-current limiting to prevent inductor saturation, and precision enable threshold with hysteresis. All protections are fully specified over –40°C to +125°C and validated per AEC-Q100 stress testing protocols.
LTC3310SIV-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)
LTC3310SIV-1#PBF FAQ
1.How can I place an order for LTC3310SIV-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SIV-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 LTC3310SIV-1#PBF reliable?
The price and inventory of LTC3310SIV-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 LTC3310SIV-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3310SIV-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SIV-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SIV-1#PBF?
LTC3310SIV-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SIV-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 LTC3310SIV-1#PBF?
For technical support, including LTC3310SIV-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SIV-1#PBF requirements.
6.How does Aetrix verify that LTC3310SIV-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SIV-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 LTC3310SIV-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3310SIV-1#PBF?
All LTC3310SIV-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SIV-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 LTC3310SIV-1#PBF part is unused and in its original packaging.
Return procedure for LTC3310SIV-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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