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Analog Devices Inc. LTC3310SEV#WTRMPBF
- Part No.:
- LTC3310SEV#WTRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV#WTRMPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:760
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Product details
Overview
LTC3310SEV#WTRMPBF 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 temperature range (–40°C to 125°C) and targets FPGA, ASIC, and µP core supplies requiring low EMI and fast transient response.
For engineers reviewing the LTC3310SEV#WTRMPBF datasheet, LTC3310SEV#WTRMPBF pinout, LTC3310SEV#WTRMPBF application, or LTC3310SEV#WTRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and EMI performance data, and real-world design implications for high-current POL systems.
Technical Context
The LTC3310SEV#WTRMPBF employs constant-frequency peak current mode control with internal hot-loop bypass capacitors for ultralow EMI emissions per CISPR25 Class 5. Its dual MOSFET power stage integrates a 4.5mΩ NMOS and 16mΩ PMOS switch, enabling high efficiency at up to 5MHz switching frequency.
It supports programmable frequency via RT pin, clock synchronization through MODE/SYNC, and configurable operation modes (pulse-skip or forced continuous). The device includes die temperature monitoring via SSTT pin, precision enable threshold (400mV), and active voltage positioning only in -1 variants - not applicable to LTC3310SEV#WTRMPBF (standard adjustable version).
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 external LDO pre-regulation. |
| VOUT Range | 0.5V to VIN - enables direct regulation of sub-1V FPGA/ASIC cores with remote sense compensation. |
| Output Accuracy | ±1% with remote sense - ensures stable core voltage under PCB trace resistance-induced ground offsets up to ±100mV. |
| Switching Frequency | Programmable 0.5MHz–5MHz - allows optimization of inductor size vs. efficiency; default 2MHz with RT = 274kΩ. |
| Top/Bottom RDS(ON) | 16mΩ PMOS / 4.5mΩ NMOS - reduces conduction loss at 10A load, enabling >90% efficiency at 3.3V→1.2V conversion. |
| Min On-Time | 35ns - supports high step-down ratios (e.g., 5V→0.5V) at 5MHz without pulse skipping instability. |
| Shutdown Current | 1µA - enables ultra-low-power system standby states without external disconnect switches. |
Pinout & Package
Thermally enhanced 18-lead 3mm × 3mm LQFN package with exposed PGND pad (Pin 19) requiring solder connection to PCB ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV rising threshold with hysteresis; direct tie-to-VIN enables always-on operation. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; compensates for PCB IR drop between IC and load. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce impedance; must be bypassed locally to PGND with low-ESR ceramic capacitors. |
| PGND (5,10,19) | Power ground return path | Exposed pad (Pin 19) is PGND - requires multiple thermal vias to inner ground plane for θJCbottom = 9°C/W. |
| SW (6–9) | Switch node output | Four paralleled SW pins minimize loop inductance; connect directly to inductor with short, wide copper traces. |
| MODE/SYNC (13) | Frequency control interface | Accepts external clock for synchronization or outputs clock signal; selects pulse-skip/forced continuous mode. |
| PGOOD (14) | Power-good status indicator | Open-drain output asserting low when VOUT deviates >3% from regulation or during fault conditions. |
| RT (15) | Oscillator frequency programming | Resistor to AGND sets switching frequency; 274kΩ yields 2MHz nominal operation. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current source for soft-start capacitor; transitions to die temperature monitor (4mV/°C) post-startup. |
| ITH (17) | Error amplifier compensation node | Connect Type II/III compensation network referenced to AGND for loop stability across load transients. |
| FB (18) | Feedback voltage input | Regulated to 500mV; connects to resistor divider from VOUT to set output voltage (e.g., 1.2V = RA/RB = 1.4). |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors reduce radiated EMI by >30dB vs. SS1, meeting CISPR25 Class 5 limits without external filters. |
| 100% duty cycle operation | Enables dropout regulation down to VIN ≈ VOUT + ILOAD × RDS(ON)_PMOS, critical for battery-powered systems near end-of-discharge. |
| Configurable multi-phase support | MODE/SYNC pin enables precise phase alignment across paralleled LTC3310SEV#WTRMPBF units for >10A scalable power delivery. |
| Robust overload protection | Independent top-switch current limit (16A typ) and bottom-switch valley limit (12A typ) prevent inductor saturation during sustained overloads. |
| Thermal monitoring & shutdown | Dedicated SSTT pin provides real-time junction temperature readout (4mV/°C); thermal shutdown activates above 150°C junction temperature. |
Applications
| High-Performance FPGA Core Supply | Automotive ADAS Domain Controller |
|---|---|
|
Use Scenario: Powering Xilinx Versal or Intel Agilex FPGA core rails requiring 0.8V @ 8A with <15mV ripple and strict sequencing. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with remote sense, soft-start tracking, and PGOOD signaling for system power management unit (PMU). Use Value: ±1% output accuracy and 35ns min-on-time ensure stable core voltage across process/voltage/temperature corners; Silent Switcher 2 eliminates need for EMI shielding cans. |
Use Scenario: Generating 1.0V/1.8V rails for NVIDIA Orin-based ADAS domain controllers in ISO 26262-compliant vehicle platforms. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified POL converter providing isolated, monitored, and synchronized power for safety-critical SoCs. Use Value: –40°C to 125°C operating range, integrated thermal monitoring, and robust short-circuit recovery meet ASIL-B functional safety requirements without external supervision. |
| 5G Baseband Radio Unit (RU) | Industrial Edge AI Accelerator |
|
Use Scenario: Delivering 1.2V @ 10A to massive MIMO RF transceiver ASICs with tight transient response demands (<50µs recovery from 1A→9A step). IC Role / Device Role / Timing Role: High-bandwidth current-mode controller with 2MHz switching and forced continuous mode for predictable ripple spectrum in RF-sensitive environments. Use Value: Peak current mode control + 500mV reference delivers <10mV undershoot/overshoot; synchronized operation avoids beat frequencies with adjacent clock domains. |
Use Scenario: Powering Google Edge TPU or Habana Gaudi AI accelerators in fanless industrial gateways requiring silent, convection-cooled operation. IC Role / Device Role / Timing Role: Low-noise, thermally efficient POL regulator with die temperature telemetry for predictive thermal throttling in sealed enclosures. Use Value: 3mm × 3mm LQFN package with θJA = 42°C/W enables 10A operation without heatsink; SSTT pin enables firmware-based thermal derating before shutdown. |
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 | Fixed 10A rating, 2.7V–16V VIN, no remote sense, lower EMI margin (no Silent Switcher) | Acceptable for non-automotive, non-RF applications where input voltage exceeds 5.5V and ±1% accuracy is not required | Select when wider input range is needed and EMI filtering can be added externally; verify thermal performance at 10A in same footprint. |
| TPS546D24A from Texas Instruments | 12A rating, 3.0V–18V VIN, PMBus interface, no integrated bypass caps, larger 4mm × 4mm QFN | Suitable for digitally controlled systems requiring telemetry, but lacks automotive qualification and Silent Switcher EMI performance | Choose for systems needing real-time telemetry and dynamic voltage scaling; avoid where board space or CISPR25 compliance is critical. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310SEV#WTRMPBF uniquely combines AEC-Q100 qualification, integrated Silent Switcher 2 EMI suppression, 3mm × 3mm footprint, and ±1% remote-sense accuracy - making it optimal for space-constrained, safety-critical, and RF-sensitive 10A POL designs.
Availability
LTC3310SEV#WTRMPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and 5G radio unit power delivery requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LTC3310SEV#WTRMPBF 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 industrial, automotive, communications, and healthcare markets since 1965.
The LTC3310SEV#WTRMPBF belongs to the Silent Switcher family of high-efficiency, low-EMI DC/DC converters designed specifically for noise-sensitive, high-current point-of-load applications in automotive, computing, and telecom infrastructure.
FAQ
What is the maximum output current capability of the LTC3310SEV#WTRMPBF?
The LTC3310SEV#WTRMPBF is rated for continuous 10A output current under typical thermal conditions (θJA = 42°C/W, 2-layer PCB, 2oz copper). At full load and 3.3V input, its 4.5mΩ NMOS and 16mΩ PMOS switches deliver >90% efficiency. Derating is required above 85°C ambient or with insufficient copper area; the device enters thermal shutdown above 150°C junction temperature.
Does the LTC3310SEV#WTRMPBF support remote voltage sensing?
Yes, the LTC3310SEV#WTRMPBF supports true remote sense via dedicated AGND and FB pins. Connect AGND directly to the load's ground return point and the FB divider's low-side resistor to AGND - this compensates for up to ±100mV IR drop between IC ground and load ground, ensuring ±1% output accuracy regardless of PCB layout resistance.
Can the LTC3310SEV#WTRMPBF be synchronized to an external clock?
Yes, the MODE/SYNC pin of the LTC3310SEV#WTRMPBF accepts an external square wave clock (0.5MHz–2.25MHz) to synchronize switching frequency. Upon detection, the internal PLL locks to the external source within microseconds; removal triggers automatic reversion to default frequency (e.g., 2MHz with RT = 274kΩ) within ~20µs.
What package type and thermal characteristics does the LTC3310SEV#WTRMPBF use?
The LTC3310SEV#WTRMPBF uses a 18-lead 3mm × 3mm LQFN package with exposed PGND pad (Pin 19). Its thermal metrics include θJA = 42°C/W (JEDEC standard), θJCbottom = 9°C/W, and ΨJT = 1.25°C/W. For optimal performance, solder the exposed pad to a solid inner ground plane using ≥9 thermal vias (0.3mm diameter).
How does the LTC3310SEV#WTRMPBF handle output short-circuit conditions?
Under output short, the LTC3310SEV#WTRMPBF clamps peak inductor current and activates valley current limiting (IVALLEYMAX = 12A typ) to hold off the top switch until inductor current decays. Recovery initiates a full soft-start cycle: SSTT is pulled low, forcing VOUT ramp-up with controlled slew rate - preventing inrush and ensuring reliable restart without manual reset.
LTC3310SEV#WTRMPBF 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#WTRMPBF FAQ
1.How can I place an order for LTC3310SEV#WTRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV#WTRMPBF 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#WTRMPBF reliable?
The price and inventory of LTC3310SEV#WTRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310SEV#WTRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV#WTRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV#WTRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV#WTRMPBF?
LTC3310SEV#WTRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV#WTRMPBF 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#WTRMPBF?
For technical support, including LTC3310SEV#WTRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV#WTRMPBF requirements.
6.How does Aetrix verify that LTC3310SEV#WTRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV#WTRMPBF 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#WTRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV#WTRMPBF?
All LTC3310SEV#WTRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV#WTRMPBF, 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#WTRMPBF part is unused and in its original packaging.
Return procedure for LTC3310SEV#WTRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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