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Analog Devices Inc. LTC3310JV#TRPBF
- Part No.:
- LTC3310JV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310JV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,641
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Product details
Overview
LTC3310JV#TRPBF from Analog Devices is a monolithic, Silent Switcher 2 synchronous step-down DC/DC converter delivering up to 10A output current from a 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 junction temperature range (–40°C to +150°C) and targets high-density POL applications such as FPGA core supplies.
For engineers reviewing the LTC3310JV#TRPBF datasheet, LTC3310JV#TRPBF pinout, LTC3310JV#TRPBF application, or LTC3310JV#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification, integrated hot-loop bypass capacitors for ultralow EMI, programmable switching frequency up to 5MHz, and support for multiphase paralleling in high-power systems.
Technical Context
The LTC3310JV#TRPBF 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 2MHz–5MHz operation while maintaining <10mVpp output ripple under transient load steps.
It supports three operating modes via MODE/SYNC pin: pulse-skipping for light-load efficiency, forced continuous conduction for low-noise regulation, and external clock synchronization with 0.5–2.25MHz lock range. Thermal shutdown, output overvoltage protection (106–112.5% VOUT), and valley-current limiting (10–14A) ensure robust fault handling.
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 Accuracy | ±1% with remote sense - ensures stable core voltage under PCB trace IR drop up to ±100mV. |
| Max Output Current | 10A continuous - delivered via integrated 4.5mΩ NMOS and 16mΩ PMOS switches in thermally enhanced LQFN. |
| Switching Frequency | Programmable 0.5–5MHz via RT resistor - enables compact magnetics and avoids AM band interference. |
| Min On-Time | 35ns - supports high step-down ratios (e.g., 5V→0.5V at 2MHz) without pulse skipping. |
| Shutdown Current | 1µA - preserves battery life in always-on automotive modules during sleep states. |
| EN Threshold | Precision 400mV rising threshold with 60mV hysteresis - enables accurate power sequencing with external resistor dividers. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (θJCbottom = 9°C/W). Requires soldering of exposed pad to PCB thermal plane for reliable 150°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV threshold with hysteresis; pulls device into 1µA shutdown when below 375mV. |
| AGND (2) | Remote sense ground | Kelvin connection point for FB divider low-side; rejects up to ±100mV PCB ground offset. |
| VIN (3,4,11,12) | Main power input | Four parallel pins reduce IR drop and inductance; must be shorted and locally bypassed to PGND. |
| PGND (5,10,19) | Power ground return | Three dedicated pins + exposed pad form primary thermal path; connect to large copper area with ≥6 vias. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins minimize loop inductance; connect directly to inductor with wide, short traces. |
| MODE/SYNC (13) | Mode control / clock I/O | Configures pulse-skip vs. forced CCM or accepts/sends sync clock (0.5–2.25MHz) for multi-phase alignment. |
| PGOOD (14) | Power-good open-drain output | Asserts high after 100µs delay when VOUT reaches 97–99% of target; sinks 5mA max. |
| RT (15) | Oscillator frequency set | Resistor to AGND programs fSW from 0.5–5MHz; RT = 274kΩ yields 2MHz nominal. |
| SSTT (16) | Soft-start / track / temp monitor | 10µA current charges external cap for controlled ramp; transitions to 4mV/°C die temp readout post-startup. |
| ITH (17) | Current limit compensation | Loop compensation node referenced to AGND; sets peak current limit and transient response bandwidth. |
| FB/VOUT (18) | Feedback input / fixed-output sense | Regulates to 500mV (LTC3310J); for LTC3310J-1 variant, pin is VOUT and regulated to 1.000V ±10mV. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors reduce radiated EMI by >30dB vs. SS1, meeting CISPR 25 Class 5 limits without external filters. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VIN ≈ VOUT + (IL × 16mΩ), critical for battery-powered systems near end-of-discharge. |
| Configurable Multiphase Support | MODE/SYNC pin enables precise phase interleaving across multiple LTC3310J devices, reducing input/output ripple and thermal stress. |
| Dual Protection Scheme | Peak current limit (14.5–18.5A) + valley current limit (10–14A) prevents inductor saturation and MOSFET overstress during overload/short-circuit events. |
| Active Voltage Positioning (AVP) | Only on LTC3310J-1 variant: adjusts VOUT by –2.4mV/A load increase to improve transient response and cut bulk capacitance by 30%. |
Applications
| Automotive ADAS Domain Controller | Industrial PLC CPU Core Supply |
|---|---|
Use Scenario: Powering 1.2V/8A FPGA fabric in radar processing unit exposed to under-hood temperatures up to 125°C ambient. IC Role / Device Role / Timing Role: Primary POL regulator with remote sense, synchronized to system clock via MODE/SYNC pin for deterministic noise placement. Use Value: Silent Switcher 2 EMI performance eliminates need for ferrite beads; AEC-Q100 Grade J rating guarantees operation at 150°C junction. |
Use Scenario: Delivering 0.85V/6A to ARM Cortex-A53 processor in DIN-rail mounted controller with 24V DC input. IC Role / Device Role / Timing Role: High-efficiency buck converter with programmable 2.2MHz switching to avoid 2.4GHz ISM band interference in wireless comms modules. Use Value: 4.5mΩ NMOS + 16mΩ PMOS delivers >92% efficiency at full load; SSTT pin enables real-time die temperature monitoring for fan control. |
| 5G Small Cell Baseband ASIC | Medical Imaging FPGA Power Rail |
Use Scenario: Generating 0.95V/10A for 5G NR baseband ASIC requiring sub-20mVpp ripple and fast load transient response. IC Role / Device Role / Timing Role: Synchronous buck with forced CCM mode and 35ns min on-time to maintain regulation during 1A/µs load steps. Use Value: Peak current mode control achieves <10µs recovery from 2A→8A transients; PGOOD signal validates rail stability before ASIC boot. |
Use Scenario: Supplying 1.0V/5A to Xilinx Ultrascale+ FPGA in portable ultrasound scanner with strict EMI limits. IC Role / Device Role / Timing Role: Fixed-output (LTC3310J-1) regulator with AVP to tighten DC load regulation and reduce required ceramic capacitance. Use Value: AVP slope of –2.4mV/A lowers peak capacitor stress during dynamic imaging workloads; meets IEC 60601-1 conducted emissions limits. |
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 | 10A rated, but only 2.7–6V VIN range; no integrated hot-loop caps; 12µA quiescent current vs. 1µA. | Not AEC-Q100 qualified; lacks remote sense AGND pin and PGOOD accuracy spec. | Choose for cost-sensitive industrial apps where EMI filtering is acceptable and automotive qualification is unnecessary. |
| TPS546D24 | 10A, 2.95–18V VIN, PMBus interface; higher 3.5mΩ/12mΩ RDS(ON); no Silent Switcher EMI mitigation. | Supports digital telemetry and margining; requires external compensation and sequencing ICs. | Prefer when system-level telemetry, adaptive voltage scaling, or wide-input flexibility outweighs EMI and layout simplicity needs. |
Compared with MPM3695-100 and TPS546D24, the LTC3310JV#TRPBF uniquely combines AEC-Q100 Grade J qualification, integrated Silent Switcher 2 EMI suppression, and true 2.25V minimum input-enabling direct Li-ion and USB-C PD integration without input pre-regulation or external EMI filters.
Availability
LTC3310JV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS systems, industrial PLCs, 5G small cell infrastructure, and medical imaging equipment requiring stable component supply across extended temperature and long lifecycle commitments.
Supply support for LTC3310JV#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and automotive markets since 1965.
The LTC3310JV#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, low-EMI DC/DC converters designed specifically for demanding automotive, industrial, and communications applications where reliability, thermal performance, and electromagnetic compatibility are critical.
FAQ
What is the maximum junction temperature rating for the LTC3310JV#TRPBF?
The LTC3310JV#TRPBF is rated for operation from –40°C to +150°C junction temperature and is qualified per AEC-Q100 Grade J. This allows deployment in under-hood automotive environments without derating. The device includes thermal shutdown that activates above 150°C, and the exposed PGND pad must be soldered to a thermal plane to maintain safe operation at full 10A load.
Does the LTC3310JV#TRPBF support remote voltage sensing, and how is it implemented?
Yes, the LTC3310JV#TRPBF supports true remote voltage sensing via its dedicated AGND pin (Pin 2). AGND must be connected directly to the negative terminal of the output capacitor at the load, and the bottom resistor of the FB divider must tie to AGND-not local PGND. This Kelvin connection compensates for up to ±100mV ground offset between IC and load, ensuring ±1% VOUT accuracy is maintained across the PCB.
Can the LTC3310JV#TRPBF be synchronized to an external clock, and what is the supported frequency range?
Yes, the LTC3310JV#TRPBF uses its MODE/SYNC pin (Pin 13) to accept an external square-wave clock for synchronization. It locks to frequencies from 0.5MHz to 2.25MHz using an internal PLL. During sync, the device operates in pulse-skip mode, and slope compensation automatically adapts. If the external clock is removed, the device detects loss within ~20µs and smoothly returns to its default RT-set frequency.
How does the LTC3310JV#TRPBF handle output short-circuit conditions?
Under output short-circuit, the LTC3310JV#TRPBF employs dual current limiting: peak switch current (14.5–18.5A) and valley inductor current (10–14A). When valley current exceeds the limit, the top switch is held off and cycles are skipped until current decays. Recovery initiates a soft-start cycle-SSTT is pulled low to ~140mV above FB, forcing controlled VOUT ramp-up once the short is cleared.
Is the LTC3310JV#TRPBF pin-compatible with other members of the LTC3310 family, such as the LTC3310S?
No, the LTC3310JV#TRPBF is not pin-compatible with the LTC3310S. While both use the same 18-lead 3mm × 3mm LQFN package, the LTC3310S features different internal architecture (Silent Switcher 2 with integrated VIN–AGND cap), different EN threshold (400mV vs. 400mV but different hysteresis), and distinct thermal grade (125°C vs. 150°C). Layout reuse requires verification of all pin functions and absolute maximum ratings per datasheet Rev. F.
LTC3310JV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- 500kHz ~ 5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310JV#TRPBF FAQ
1.How can I place an order for LTC3310JV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310JV#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 LTC3310JV#TRPBF reliable?
The price and inventory of LTC3310JV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310JV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310JV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310JV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310JV#TRPBF?
LTC3310JV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310JV#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 LTC3310JV#TRPBF?
For technical support, including LTC3310JV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310JV#TRPBF requirements.
6.How does Aetrix verify that LTC3310JV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310JV#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 LTC3310JV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310JV#TRPBF?
All LTC3310JV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310JV#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 LTC3310JV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3310JV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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