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Analog Devices Inc. LTC3310SEV-1#TRPBF
- Part No.:
- LTC3310SEV-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV-1#TRPBF.pdf
- Description:
- IC REG BUCK 1V 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,372
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Product details
Overview
LTC3310SEV-1#TRPBF 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 integrates internal hot-loop bypass capacitors, supports 0.5–5MHz programmable switching frequency, and operates in automotive-grade –40°C to 125°C junction range.
For engineers reviewing the LTC3310SEV-1#TRPBF datasheet, LTC3310SEV-1#TRPBF pinout, LTC3310SEV-1#TRPBF application, or LTC3310SEV-1#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed EMI performance per CISPR25 Class 5, and real-world design implications for POL, FPGA core, and automotive subsystem power rails.
Technical Context
The LTC3310SEV-1#TRPBF employs constant-frequency peak current mode control with an internal 500mV reference (adjusted to 1.0V via integrated resistor divider), enabling fast transient response and stable regulation under dynamic load steps up to 9A. Its Silent Switcher 2 architecture embeds VIN-to-PGND and VIN-to-AGND bypass capacitors to minimize high-di/dt loop area and suppress radiated emissions.
It supports multiphase parallel operation via MODE/SYNC pin synchronization, offers programmable pulse-skip or forced continuous mode, and implements active voltage positioning (AVP) with 2.4mV/A load-line slope-ensuring optimal transient headroom for microprocessor cores without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.000V ±1% (with remote sense); enables direct core supply for low-voltage ASICs/FPGAs without external feedback resistors. |
| IOUT Max | 10A continuous; supported by 4.5mΩ NMOS and 16mΩ PMOS internal switches-reducing conduction loss and thermal stress at full load. |
| fSW Range | 0.5–5MHz (RT-programmable); allows optimization of size vs. efficiency-e.g., 2MHz enables compact 100nH inductors while maintaining >90% efficiency at 7.5A. |
| Min On-Time | 35ns typical; enables high step-down ratios (e.g., 5V→1V at 2MHz) without pulse-skipping instability or duty-cycle limitation. |
| VIN Range | 2.25V to 5.5V; supports single-cell Li-ion, USB PD, and intermediate bus architectures with robust UVLO (2.2V rising, 150mV hysteresis). |
| EMI Performance | CISPR25 Class 5 compliant (radiated & conducted); achieved via integrated Silent Switcher 2 layout + internal VIN bypass caps-eliminates need for external EMI filters in most automotive applications. |
| Thermal Rating | AEC-Q100 qualified (Grade E, –40°C to +125°C TJ); θJA = 42°C/W enables 10A operation on 2-layer PCB with 4× thermal vias under exposed pad. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), thermally enhanced for high-current DC/DC conversion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input with precision threshold | 400mV rising threshold (±60mV hysteresis); enables accurate power sequencing and brown-out protection without external comparator. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; rejects up to ±100mV PCB ground offset-critical for <1% VOUT accuracy at 10A. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce trace inductance and IR drop; must be shorted and decoupled locally to PGND with ≥22µF ceramic caps. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal and current return path; requires solid copper pour and ≥6 thermal vias. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins drive external inductor; low-inductance routing essential to preserve Silent Switcher 2 EMI advantage. |
| MODE/SYNC (13) | Multi-phase sync & mode control | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock; configures pulse-skip vs. forced continuous mode. |
| PGOOD (14) | Open-drain power-good indicator | Asserts after 100µs delay when VOUT reaches 98% of nominal; drives FPGA reset or system supervisor ICs directly. |
| RT (15) | Oscillator frequency set | Resistor to AGND sets fSW; 274kΩ yields 2MHz-optimized for minimal inductor size and EMI trade-off. |
| SSTT (16) | Soft-start, tracking, temp monitor | 10µA current source for soft-start cap; transitions to die temperature monitor (4mV/°C) post-startup-enables thermal derating. |
| ITH (17) | Current limit and loop compensation | Internal error amplifier output; connects to AGND via RC network to stabilize control loop across 0.1–10A load range. |
| FB/VOUT (18) | Feedback or fixed-output pin | On LTC3310SEV-1#TRPBF, this is VOUT pin-internally regulated to 1.0V; no external divider required. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors eliminate external high-frequency ceramics-reducing BOM count and PCB area while meeting CISPR25 Class 5 limits. |
| Active Voltage Positioning (AVP) | 2.4mV/A load-line slope ensures VOUT rises at light load and drops linearly to 1.0V at 10A-minimizing output capacitor requirements for CPU/GPU transient response. |
| 100% Duty Cycle Operation | Enables dropout operation down to VIN = VOUT + ILOAD × RDS(ON)_PMOS; maintains regulation during battery sag or intermediate bus droop. |
| Dual-Mode Control | Pulse-skip mode reduces light-load quiescent current to 1µA; forced continuous mode eliminates low-frequency ripple-user-selectable via MODE/SYNC pin logic level. |
| Robust Protection Suite | Includes output overvoltage (106–112.5% trip), thermal shutdown (>150°C), short-circuit recovery via SSTT-triggered soft-start, and valley current limiting (10–14A). |
Applications
| Automotive ADAS Power Rail | FPGA Core Supply |
|---|---|
|
Use Scenario: Powers image signal processor (ISP) and radar SoC in 24V vehicle systems using 5V intermediate bus. IC Role / Device Role / Timing Role: Primary POL regulator delivering clean, low-noise 1.0V @ 8A with <10mV p-p ripple and CISPR25-compliant EMI. Use Value: Eliminates need for secondary filtering stages; AEC-Q100 qualification ensures reliability in vibration-prone environments. |
Use Scenario: Supplies 1.0V core voltage to Xilinx Kria KV260 SOM under dynamic 0.5–10A load transients. IC Role / Device Role / Timing Role: High-bandwidth current-mode controller with 35ns min on-time and AVP-enabling sub-100ns load-step response. Use Value: Reduces required bulk capacitance by 40% versus non-AVP converters; supports tight FPGA VCCINT tolerance (±3%). |
| Industrial PLC I/O Module | 5G Baseband Processor |
|
Use Scenario: Powers ARM Cortex-M7 MCU and isolated CAN transceivers from 3.3V rail in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Compact 3mm × 3mm step-down converter with 1µA shutdown current-extending battery backup runtime. Use Value: Enables fanless enclosure design; thermal monitoring via SSTT pin allows firmware-based derating before thermal shutdown. |
Use Scenario: Generates 1.0V core supply for Qualcomm QDM5675 mmWave baseband chip in small-cell radio unit. IC Role / Device Role / Timing Role: Synchronized multi-phase capable regulator operating at 4MHz-fitting into space-constrained RF module PCB. Use Value: MODE/SYNC pin enables phase interleaving with adjacent LTC3310S devices, reducing input/output ripple and EMI peaks. |
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 lacks Silent Switcher 2-requires external EMI filter for CISPR25 compliance; no AVP or die temperature monitor. | Better suited for cost-sensitive industrial applications where EMI is less stringent; not AEC-Q100 qualified. | Select when board space permits external filtering and automotive qualification is unnecessary. |
| TPS546D24A | 10A, 1.0V fixed output, supports PMBus; higher 2.5mΩ NMOS RDS(ON) and no integrated VIN bypass caps-higher thermal dissipation and larger EMI footprint. | Preferred for systems requiring digital telemetry and dynamic voltage scaling; requires more complex layout for EMI control. | Select when telemetry, margining, or multi-rail coordination via PMBus is required. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310SEV-1#TRPBF delivers superior EMI performance out-of-box, automotive-grade reliability, and integrated thermal monitoring-reducing validation time and system-level filtering costs in safety-critical designs.
Availability
LTC3310SEV-1#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA core supplies, and 5G baseband processors requiring stable component supply, AEC-Q100 compliance, and low-EMI power delivery.
Supply support for LTC3310SEV-1#TRPBF 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 power management semiconductors, serving automotive, industrial, and communications markets with precision, reliability, and innovation.
The LTC3310S family targets high-density, low-EMI point-of-load regulation for advanced processors and sensors-designed specifically for automotive ADAS, data center accelerators, and next-gen wireless infrastructure where thermal, noise, and qualification constraints dominate.
FAQ
What is the output voltage accuracy of the LTC3310SEV-1#TRPBF over temperature and line/load conditions?
The LTC3310SEV-1#TRPBF guarantees ±1% output voltage accuracy over the full –40°C to +125°C junction temperature range, with remote sensing enabled. This includes contributions from line regulation (0.025%/V), load regulation (2.4mV/A AVP slope), and initial tolerance-verified per Analog Devices' Rev. F datasheet Table 1. The fixed 1.0V output eliminates external resistor errors inherent in adjustable variants like the LTC3310SEV#TRPBF.
Does the LTC3310SEV-1#TRPBF require external bypass capacitors on the VIN pins?
No-the LTC3310SEV-1#TRPBF integrates internal hot-loop bypass capacitors between VIN and PGND, and VIN and AGND, as part of its Silent Switcher 2 architecture. External high-frequency ceramic capacitors are still recommended (≥22µF per VIN pin) for bulk energy storage and low-frequency stability, but the internal caps eliminate the need for discrete 100nF–1µF high-frequency bypasses typically required in Silent Switcher 1 or conventional buck regulators.
How does the MODE/SYNC pin function in the LTC3310SEV-1#TRPBF when used for multiphase operation?
In multiphase configurations, the MODE/SYNC pin on the LTC3310SEV-1#TRPBF accepts an external clock signal to synchronize switching edges across multiple units, or outputs a clock signal to slave devices. When configured as master, it drives a 50% duty cycle clock at the programmed fSW; as slave, it locks top-switch turn-on to the rising edge of the incoming signal-enabling precise phase interleaving without external timing ICs.
Can the LTC3310SEV-1#TRPBF operate safely with inductor saturation during overload?
Yes-the LTC3310SEV-1#TRPBF includes valley current limiting that actively holds off the top switch if inductor current through the bottom switch exceeds 10–14A (IVALLEYMAX). This prevents destructive current runaway during saturation events, allowing safe operation under sustained overload or short-circuit conditions until thermal shutdown intervenes. Recovery initiates automatically via SSTT-triggered soft-start upon fault clearance.
What thermal management considerations apply to the LTC3310SEV-1#TRPBF at 10A continuous load?
At 10A continuous load with 3.3V input and 1.0V output, the LTC3310SEV-1#TRPBF dissipates ~0.8W (dominated by NMOS conduction loss). With θJA = 42°C/W, junction temperature rise is ~34°C above ambient-well within the –40°C to +125°C rating. Effective thermal design requires soldering the exposed PGND pad to ≥1cm² inner-layer copper pour with ≥6 × 0.3mm vias, and avoiding thermal isolation under the package.
LTC3310SEV-1#TRPBF 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310SEV-1#TRPBF FAQ
1.How can I place an order for LTC3310SEV-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV-1#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3310SEV-1#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV-1#TRPBF?
LTC3310SEV-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV-1#TRPBF 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#TRPBF?
For technical support, including LTC3310SEV-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV-1#TRPBF requirements.
6.How does Aetrix verify that LTC3310SEV-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV-1#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV-1#TRPBF?
All LTC3310SEV-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV-1#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3310SEV-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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