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Analog Devices Inc. LTC3310SEV#WTRPBF
- Part No.:
- LTC3310SEV#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV#WTRPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,512
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Product details
Overview
LTC3310SEV#WTRPBF from Analog Devices is a Silent Switcher® 2 monolithic synchronous step-down DC/DC converter delivering up to 10A output current from 2.25V–5.5V input, with 0.5V–VIN adjustable output, ±1% VOUT accuracy (remote sense), and 35ns minimum on-time. It operates in pulse-skip or forced continuous mode, supports clock synchronization up to 5MHz, and targets high-density power delivery in automotive and industrial POL applications.
For engineers reviewing the LTC3310SEV#WTRPBF datasheet, LTC3310SEV#WTRPBF pinout, LTC3310SEV#WTRPBF application, or LTC3310SEV#WTRPBF equivalent, key selection criteria include its 3mm × 3mm LQFN thermal performance, integrated hot-loop bypass capacitors for ultralow EMI, precision enable threshold (400mV), die temperature monitoring, and support for multi-phase paralleling in high-current systems.
Technical Context
The LTC3310SEV#WTRPBF employs constant-frequency peak current mode control with internal 500mV reference and error amplifier transconductance of 400µS. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors, enabling clean switching waveforms at up to 5MHz while meeting CISPR 25 Class 5 radiated emissions limits without external EMI filters.
It features dual current limiting: top switch limit (14.5–18.5A) and valley bottom switch limit (10–14A), plus programmable soft-start via SSTT pin, power-good reporting with 100µs delay, and active voltage positioning only in -1 variants - not applicable to LTC3310SEV#WTRPBF, which is the adjustable-output LTC3310S variant.
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 in compact systems. |
| VOUT Range | 0.5V to VIN - enables direct regulation for FPGA, ASIC, and µP core supplies down to sub-1V levels. |
| Output Accuracy | ±1% with remote sense - maintains tight regulation despite PCB trace resistance between IC and load. |
| Switching Frequency | Programmable 0.5MHz–5MHz via RT resistor - allows optimization of size (higher fSW → smaller L/C) vs. efficiency. |
| Top/Bottom RDS(ON) | 16mΩ / 4.5mΩ - enables high efficiency (>90% at 10A, 3.3V→1.2V) and low thermal rise in 3mm × 3mm package. |
| Shutdown Current | 1µA - suitable for battery-backed or always-on subsystems requiring ultra-low quiescent power. |
| Min On-Time | 35ns - supports high step-down ratios (e.g., 5V→0.6V at 2MHz) without pulse skipping instability. |
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. θJCbottom = 9°C/W, θJA = 42°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV rising threshold with 60mV hysteresis; ties directly to VIN for always-on operation. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for feedback divider - compensates for up to ±100mV ground offset at load. |
| 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. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal and current return path; requires multiple vias. |
| SW (6–9) | Switch node output | Four paralleled SW pins connect directly to inductor; minimize loop area to preserve Silent Switcher 2 EMI advantage. |
| MODE/SYNC (13) | Frequency control interface | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock; selects pulse-skip/forced-CCM mode. |
| PGOOD (14) | Open-drain power-good flag | Asserts high when VOUT is within 97–99% of target; 100µs delay filters transient dips during load steps. |
| RT (15) | Oscillator frequency set | Resistor to AGND programs fSW from 0.5MHz–5MHz; also configures phase offset in multi-phase setups. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current charges external cap for controlled ramp; transitions to 4mV/°C temp readout post-startup. |
| ITH (17) | Error amplifier compensation node | Connects RC network to AGND for loop stability; sets current limit via voltage clamp during overload. |
| FB (18) | Feedback input (adjustable version) | Regulated to 500mV ±5mV; connects to resistive divider from VOUT - defines output voltage per RA/RB equation. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors eliminate layout-sensitive external ceramics, reducing EMI test failures. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VIN ≈ VOUT + IOUT × RDS(ON)_PMOS, critical for low-VIN battery systems. |
| Configurable Multi-Phase Paralleling | MODE/SYNC pin supports master-slave phasing across multiple LTC3310S units, enabling seamless 20A+ solutions. |
| Dual Current Limit Protection | Peak (top switch) and valley (bottom switch) limits prevent inductor saturation and MOSFET overstress during overload/short-circuit. |
| Digital Temperature Monitoring | SSTT pin provides analog voltage proportional to die junction temperature (4mV/°C), enabling real-time thermal margining. |
Applications
| Automotive ADAS Power Supply | Industrial FPGA Core Rail |
|---|---|
Use Scenario: Powering vision processor SoCs in camera modules requiring stable 1.0V/1.2V at up to 8A with minimal EMI near RF receivers. IC Role / Device Role / Timing Role: Primary POL regulator with Silent Switcher 2 EMI suppression and AEC-Q100 qualification (LTC3310SEV grade). Use Value: Meets CISPR 25 Class 5 radiated limits without ferrite beads or shielding, reducing BOM cost and board area. |
Use Scenario: Delivering tightly regulated 0.85V core voltage to Xilinx Kintex Ultrascale+ FPGAs in programmable logic controllers. IC Role / Device Role / Timing Role: High-accuracy, fast-transient buck converter with remote sensing and 35ns min on-time for low-VOUT stability. Use Value: ±1% output accuracy over line/load/temperature ensures reliable FPGA configuration and timing closure. |
| Telecom Baseband Processor Rail | Server DDR5 Memory VDDQ Supply |
Use Scenario: Generating 1.8V/3A for LTE/5G baseband processors in small-form-factor radio units with strict thermal constraints. IC Role / Device Role / Timing Role: Compact, high-efficiency step-down converter with forced CCM mode for low-noise digital supply. Use Value: 4.5mΩ bottom-side RDS(ON) and 3mm × 3mm LQFN enable >93% efficiency at full load with <30°C rise. |
Use Scenario: Providing 1.25V/10A to DDR5 memory modules in edge AI servers where space and thermal density are critical. IC Role / Device Role / Timing Role: 10A monolithic buck with programmable 2–4MHz switching and multi-phase capability for parallel scaling. Use Value: Supports 5MHz max fSW to shrink output inductors/capacitors, reducing solution footprint by >30% vs. 1MHz alternatives. |
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 (Monolithic Power) | 4.5V–16V input, 6A max, no integrated hot-loop caps, 12-pin QFN | Higher VIN range but lacks Silent Switcher 2 EMI performance and 10A capability | Select when input exceeds 5.5V or cost sensitivity outweighs EMI certification needs. |
| TPS546D24RQFR (Texas Instruments) | 4.5V–18V input, 10A, PMBus interface, 20-pin QFN, no integrated bypass caps | Offers digital control and telemetry but larger package (4mm × 4mm), higher quiescent current (12µA) | Choose for systems requiring dynamic voltage scaling or telemetry-based thermal management. |
Compared with MP2964GQ-Z and TPS546D24RQFR, the LTC3310SEV#WTRPBF delivers superior EMI performance in a smaller footprint with lower shutdown current, making it optimal for space-constrained, noise-sensitive automotive and industrial POL designs where 2.25V–5.5V input is sufficient.
Availability
LTC3310SEV#WTRPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial FPGA power supplies, and telecom baseband processor rails requiring stable component supply, AEC-Q100 compliance, and ultralow EMI performance.
Supply support for LTC3310SEV#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC3310S product line delivers high-current, low-EMI monolithic DC/DC converters for point-of-load applications demanding compact size, thermal efficiency, and automotive-grade reliability - exemplified by the LTC3310SEV#WTRPBF's 3mm × 3mm LQFN and AEC-Q100 qualification.
FAQ
What is the operating temperature range for the LTC3310SEV#WTRPBF?
The LTC3310SEV#WTRPBF is rated for –40°C to +125°C junction temperature and is qualified to AEC-Q100 Grade 1 standards. Its thermal design leverages the 3mm × 3mm LQFN's low θJCbottom (9°C/W) and exposed PGND pad, enabling reliable 10A operation in automotive under-hood environments when properly mounted to a 4-layer PCB with thermal vias.
Does the LTC3310SEV#WTRPBF support output voltage tracking?
Yes, the LTC3310SEV#WTRPBF supports voltage tracking via its SSTT pin: during startup, the FB pin voltage tracks the rising SSTT voltage across an external capacitor, enabling precise sequencing with other rails. After soft-start completes, SSTT transitions to die temperature monitoring (4mV/°C), and tracking is disabled - a behavior confirmed in the LTC3310S datasheet Rev. F, Pin Functions section.
Can the LTC3310SEV#WTRPBF be synchronized to an external clock?
Yes, the LTC3310SEV#WTRPBF supports external clock synchronization via the MODE/SYNC pin, accepting square-wave inputs from 0.5MHz to 2.25MHz. When synchronized, it locks top-switch turn-on to the external clock's rising edge and automatically adapts slope compensation - a feature verified in the "Synchronizing the Oscillator to an External Clock" section of the datasheet.
What is the purpose of the AGND pin on the LTC3310SEV#WTRPBF?
The AGND pin on the LTC3310SEV#WTRPBF serves as the Kelvin reference for remote output voltage sensing. It must be connected directly to the load-side ground and the bottom of the FB resistor divider to compensate for PCB trace resistance, enabling ±1% output accuracy even with up to ±100mV ground offset - a critical capability for high-current, low-voltage FPGA and ASIC core supplies.
How does the LTC3310SEV#WTRPBF handle output short-circuit conditions?
During an output short, the LTC3310SEV#WTRPBF activates valley current limiting (IVALLEYMAX = 10–14A) to hold off the top switch until inductor current decays below threshold. Upon fault clearance, the SSTT pin is pulled low to initiate a full soft-start cycle - preventing inrush and ensuring controlled recovery, as detailed in the "Output Short-Circuit Protection and Recovery" section of the datasheet.
LTC3310SEV#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:
- 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#WTRPBF FAQ
1.How can I place an order for LTC3310SEV#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV#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#WTRPBF reliable?
The price and inventory of LTC3310SEV#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#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV#WTRPBF?
LTC3310SEV#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV#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#WTRPBF?
For technical support, including LTC3310SEV#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV#WTRPBF requirements.
6.How does Aetrix verify that LTC3310SEV#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV#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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV#WTRPBF?
All LTC3310SEV#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV#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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3310SEV#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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