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Analog Devices Inc. LTC3310SIV#TRMPBF
- Part No.:
- LTC3310SIV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SIV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,055
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Product details
Overview
LTC3310SIV#TRMPBF 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 pulse-skip or forced continuous mode and is used in FPGA/ASIC core supplies requiring low-noise, high-efficiency POL regulation.
For engineers reviewing the LTC3310SIV#TRMPBF datasheet, LTC3310SIV#TRMPBF pinout, LTC3310SIV#TRMPBF application, or LTC3310SIV#TRMPBF equivalent, key selection criteria include its 3mm × 3mm LQFN thermal performance, AEC-Q100 qualification for automotive use, programmable 0.5–5MHz switching frequency, and integrated hot-loop bypass capacitors enabling ultralow EMI without external layout constraints.
Technical Context
The LTC3310SIV#TRMPBF employs constant-frequency peak current mode control with internal 400µS error amplifier transconductance and 18A/V ITH-to-peak-current gain, enabling fast transient response. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors, eliminating external high-frequency ceramic placement sensitivity.
It supports multiphase parallel operation via MODE/SYNC pin synchronization, configurable soft-start with voltage tracking, and die temperature monitoring via SSTT pin (4mV/°C slope). Output overvoltage protection triggers at 106–112.5% of regulated VOUT with 1–3.5% hysteresis, and power good signaling includes 100µs delay filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, 3.3V/5V intermediate bus, and low-dropout operation down to 0.5V above VOUT. |
| VOUT Range | 0.5V to VIN - adjustable output with ±1% accuracy using external resistor divider; fixed 1V version available as LTC3310S-1. |
| Max Output Current | 10A - sustained delivery enabled by 4.5mΩ NMOS and 16mΩ PMOS switches, thermally enhanced 3mm × 3mm LQFN package. |
| Switching Frequency | Programmable 0.5MHz to 5MHz via RT pin - allows optimization of size vs. efficiency; default 2MHz with 274kΩ resistor. |
| Min On-Time | 35ns - enables high step-down ratios (e.g., 5V→0.5V at 2MHz) without pulse skipping at light loads. |
| Shutdown Current | 1µA - ultra-low quiescent draw during disable, critical for battery-backed systems and always-on domains. |
| EN Threshold | Precision 400mV rising threshold with 60mV hysteresis - enables accurate input UVLO programming via external resistor divider. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, rated for –40°C to 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV threshold with hysteresis; direct tie to VIN for always-on operation or resistor divider for programmable UVLO. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; compensates for PCB trace IR drop up to ±100mV between local and load ground. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce impedance; must be shorted and bypassed locally to PGND with low-ESR capacitors due to high di/dt. |
| PGND (5,10,19) | Power ground return path | Primary thermal conduction path; exposed pad (Pin 19) must be soldered to large PCB ground plane with multiple vias. |
| SW (6–9) | Switch node output | Four paralleled switch outputs connect directly to inductor; minimized loop area essential for EMI and efficiency. |
| MODE/SYNC (13) | Frequency control interface | Accepts external clock for synchronization or outputs clock for multiphase; also selects pulse-skip vs. forced continuous mode. |
| PGOOD (14) | Open-drain power-good indicator | Asserts low when VOUT deviates >3% from regulation; includes 100µs delay to reject transient glitches. |
| RT (15) | Oscillator frequency set | Resistor to AGND programs switching frequency from 0.5MHz to 5MHz; also sets phase offset in multiphase configurations. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current source for soft-start capacitor; tracks FB during startup; settles to 4mV/°C voltage proportional to die temperature. |
| ITH (17) | Current limit and loop compensation | Internal node controlling peak inductor current; external RC network referenced to AGND sets loop stability and transient response. |
| FB (18) | Feedback input (LTC3310S) | Regulated to 500mV; connects to resistor divider from VOUT; supports remote sensing via AGND connection for ±1% accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors eliminate external high-frequency ceramic placement dependency and reduce radiated EMI below CISPR 25 Class 5 limits. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VIN = VOUT + RDS(ON)_PMOS × IOUT, supporting applications like 3.3V→3.0V core rails with minimal voltage headroom. |
| Configurable Multiphase Support | MODE/SYNC pin enables seamless parallel operation of multiple LTC3310S units with phase interleaving to reduce input/output ripple and improve thermal distribution. |
| Output Short-Circuit Recovery | Automatic soft-start reinitiation triggered by PGOOD fault detection; SSTT pin pulled to ~140mV above VFB forces controlled ramp-up after short removal. |
| AEC-Q100 Qualified | Rated for automotive applications (Grade I: –40°C to +125°C), with validated reliability testing including HTOL, TC, and UHAST per AEC standards. |
Applications
| FPGA Core Supply | Automotive ADAS Domain Controller |
|---|---|
|
Use Scenario: Powering Xilinx Versal or Intel Agilex FPGA core logic requiring tightly regulated 0.8V @ 8A with <20mV ripple under dynamic load steps. IC Role / Device Role / Timing Role: Primary POL regulator with remote sense, active voltage positioning, and fast transient response to handle 5A/µs load steps. Use Value: 35ns min on-time and 400µS error amp transconductance enable sub-100ns recovery from 5A load transients while maintaining ±1% output accuracy. |
Use Scenario: Providing 1.0V core rail to NVIDIA Orin SoC in autonomous driving ECUs operating in under-hood environments up to 125°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 qualified synchronous buck converter with die temperature monitoring and robust short-circuit recovery for safety-critical power domains. Use Value: Integrated thermal shutdown, PGOOD reporting, and SSTT-based junction temperature readback support ISO 26262 functional safety requirements. |
| Telecom Baseband Processor | Industrial PLC I/O Module |
|
Use Scenario: Generating 1.2V @ 10A for Qualcomm QDM4270 baseband processors in 5G small cell radios with strict EMI compliance (CISPR 25 Class 5). IC Role / Device Role / Timing Role: Low-EMI POL regulator synchronized across multiple rails using MODE/SYNC to avoid beat frequencies in dense RF environments. Use Value: Silent Switcher 2 architecture achieves >30dB reduction in peak radiated emissions versus legacy Silent Switcher 1, eliminating need for external EMI filters. |
Use Scenario: Delivering 3.3V @ 3A to isolated CAN/FlexRay transceivers and microcontrollers in factory automation controllers with wide input range (2.25–5.5V). IC Role / Device Role / Timing Role: Flexible-input buck converter supporting brownout resilience and seamless transition between 3.3V and 5V backplane supplies. Use Value: 1µA shutdown current and 2.25V minimum VIN enable operation from partially discharged backup batteries during AC mains failure. |
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 from Monolithic Power Systems | 10A rated, 2.7–16V input, 3mm × 4mm QFN, no integrated hot-loop caps, requires external compensation. | Lacks Silent Switcher 2 EMI performance and AEC-Q100 qualification; better suited for industrial non-automotive use. | Select when higher VIN range is needed and EMI filtering can be added externally; verify thermal derating above 85°C ambient. |
| TPS546D24A from Texas Instruments | 10A, 3–16V input, 4mm × 4mm QFN, PMBus interface, digital control loop, no integrated bypass caps. | Offers telemetry and programmability but larger footprint, higher BOM count, and no AEC-Q100 grade; not optimized for ultralow EMI. | Choose for systems requiring real-time telemetry, margining, or dynamic voltage scaling; avoid where board space and EMI are critical. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310SIV#TRMPBF delivers superior EMI performance in minimal area, automotive-grade reliability, and simpler analog design-making it optimal for space-constrained, noise-sensitive, and safety-critical POL applications.
Availability
LTC3310SIV#TRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and telecom baseband processors requiring stable component supply, AEC-Q100 compliance, and ultralow EMI performance.
Supply support for LTC3310SIV#TRMPBF 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, industrial automation, communications, and automotive markets.
The LTC3310S series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for high-efficiency, low-EMI point-of-load regulation in space-constrained and noise-sensitive applications such as datacenter ASICs and autonomous vehicle compute modules.
FAQ
What is the maximum output current capability of the LTC3310SIV#TRMPBF?
The LTC3310SIV#TRMPBF delivers up to 10A continuous output current under typical thermal conditions (TA = 25°C, 2-layer PCB with 2oz copper, 4cm² thermal pad). Derating applies above 85°C ambient; full 10A is maintained up to 125°C junction temperature with proper heatsinking via the exposed PGND pad.
Does the LTC3310SIV#TRMPBF support remote voltage sensing?
Yes, the LTC3310SIV#TRMPBF supports true Kelvin remote sensing via dedicated AGND and FB pins. Connecting AGND directly to the load's ground reference enables compensation for up to ±100mV PCB trace IR drop, ensuring ±1% output accuracy regardless of board layout parasitics.
How does the Silent Switcher 2 architecture in the LTC3310SIV#TRMPBF reduce EMI?
The LTC3310SIV#TRMPBF integrates internal bypass capacitors between VIN–PGND and VIN–AGND, minimizing high-di/dt loop area and eliminating sensitivity to external ceramic placement. This reduces both conducted and radiated EMI, enabling compliance with CISPR 25 Class 5 limits without additional filtering components.
Can the LTC3310SIV#TRMPBF be synchronized to an external clock?
Yes, the MODE/SYNC pin accepts an external square wave (0.5–2.25MHz) to synchronize switching frequency and phase. During sync, the device operates in pulse-skip mode, and the internal PLL locks within microseconds-enabling multi-rail coherence in telecom and server applications.
What thermal grade does the LTC3310SIV#TRMPBF support?
The LTC3310SIV#TRMPBF is specified for –40°C to +125°C operating junction temperature and is AEC-Q100 qualified for automotive Grade I applications. Its 3mm × 3mm LQFN package features θJCbottom = 9°C/W, enabling efficient heat transfer to the PCB ground plane.
LTC3310SIV#TRMPBF 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310SIV#TRMPBF FAQ
1.How can I place an order for LTC3310SIV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SIV#TRMPBF 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#TRMPBF reliable?
The price and inventory of LTC3310SIV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310SIV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SIV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SIV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SIV#TRMPBF?
LTC3310SIV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SIV#TRMPBF 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#TRMPBF?
For technical support, including LTC3310SIV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SIV#TRMPBF requirements.
6.How does Aetrix verify that LTC3310SIV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SIV#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SIV#TRMPBF?
All LTC3310SIV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SIV#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3310SIV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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