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Analog Devices Inc. LTC3310SEV#TRMPBF
- Part No.:
- LTC3310SEV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310SEV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:544
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Product details
Overview
LTC3310SEV#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 supports clock synchronization for multi-phase designs in high-density power systems.
For engineers reviewing the LTC3310SEV#TRMPBF datasheet, LTC3310SEV#TRMPBF pinout, LTC3310SEV#TRMPBF application, or LTC3310SEV#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 compliance per CISPR25 Class 5.
Technical Context
The LTC3310SEV#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 to minimize high-di/dt loop area and suppress radiated emissions.
It supports multiphase parallel operation via MODE/SYNC pin, offers configurable soft-start with voltage tracking, and implements dual overcurrent protection: top-switch peak limit (14.5–18.5A) and bottom-switch valley limit (10–14A), ensuring safe operation during inductor saturation or short-circuit events.
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 regulators. |
| VOUT Range | 0.5V to VIN - enables low-voltage core supplies for FPGAs, ASICs, and microprocessors down to sub-1V. |
| Output Accuracy | ±1% with remote sense - maintains tight regulation despite PCB trace resistance between IC and load. |
| Switching Frequency | Programmable 0.5–5MHz - allows optimization of size (higher fSW → smaller inductors/caps) vs. efficiency (lower fSW → reduced switching loss). |
| Top/Bottom RDS(ON) | 4.5mΩ NMOS / 16mΩ PMOS - delivers >90% efficiency at 10A/1.2V out with 3.3V input in forced CCM mode. |
| Shutdown Current | 1µA - enables ultra-low-power standby in battery-backed or always-on systems. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade E for under-hood automotive applications. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, requiring soldered thermal connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV threshold with hysteresis; direct tie to VIN enables operation, pull below 375mV disables regulator with 1µA shutdown current. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for FB divider low-side; compensates for up to ±100mV ground offset between IC and load. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce IR drop and inductance; must be short-traced and locally bypassed to PGND with low-ESR ceramics. |
| PGND (5,10,19) | Power ground return | Primary thermal path; exposed pad (Pin 19) must be soldered to large PCB ground plane with multiple vias for θJCbottom = 9°C/W. |
| SW (6–9) | Switch node output | Four paralleled pins drive external inductor; low-inductance routing minimizes ringing and EMI in Silent Switcher 2 layout. |
| MODE/SYNC (13) | Multi-phase sync & mode control | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock; selects pulse-skip vs. forced CCM operation. |
| PGOOD (14) | Power-good status indicator | Open-drain output pulled low if VOUT deviates >3% from setpoint or during fault; 100µs delay filters transient glitches. |
| RT (15) | Oscillator frequency programming | Resistor to AGND sets fSW from 0.5–5MHz; RT = 274kΩ yields nominal 2MHz operation. |
| SSTT (16) | Soft-start, tracking, temp monitor | 10µA current charges external cap for controlled VOUT ramp; post-startup voltage reflects die temperature (4mV/°C). |
| ITH (17) | Current limit compensation node | Connects external RC network to AGND; sets loop stability and peak current limit response dynamics. |
| FB (18) | Feedback voltage input | Regulated to 500mV; connects to resistor divider from VOUT; internal error amp compares against 0.5V reference referenced to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors eliminate need for external high-frequency ceramic caps and reduce radiated EMI by >20dB vs. SS1. |
| 100% duty cycle operation | Enables dropout operation down to VIN ≈ VOUT + IOUT × RDS(ON)_PMOS, critical for battery-powered systems near end-of-discharge. |
| Configurable soft-start with tracking | External capacitor on SSTT pin controls VOUT ramp rate and enables precise power sequencing with other rails in multi-rail systems. |
| Dual overcurrent protection | Peak current limit (14.5–18.5A) prevents MOSFET failure during overload; valley current limit (10–14A) protects against inductor saturation and short-circuit latch-up. |
| AEC-Q100 Grade E qualification | Validated for automotive under-hood operation at –40°C to +125°C junction temperature, including HTOL, TC, and ESD testing per stress requirements. |
Applications
| Automotive ADAS Power Supply | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Powering radar SoCs and camera ISPs in advanced driver-assistance systems where EMI must meet CISPR25 Class 5 limits. IC Role / Device Role / Timing Role: Primary 1.2V/10A POL regulator with synchronized multi-phase capability for noise-sensitive RF and imaging subsystems. Use Value: Silent Switcher 2 architecture achieves <40dBµV/m radiated emissions at 100MHz without external EMI filters, reducing BOM cost and board area. | Use Scenario: Delivering tightly regulated 0.85V core voltage to Xilinx Kintex Ultrascale+ FPGAs with dynamic current demands up to 8A. IC Role / Device Role / Timing Role: High-bandwidth current-mode buck controller with 35ns min-on-time supporting rapid load transients during configuration bursts. Use Value: ±1% remote-sense accuracy and active voltage positioning (AVP) minimize required bulk capacitance while maintaining <±25mV droop during 6A/µs load steps. |
| Industrial PLC I/O Module | 5G Baseband Processor Rail |
Use Scenario: Providing isolated 3.3V/5A auxiliary rail in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Robust DC/DC converter with thermal shutdown, output OVP, and die temperature monitoring for long-term reliability. Use Value: AEC-Q100 qualification ensures 15-year field life at 125°C junction; SSTT pin provides real-time die temperature telemetry for predictive maintenance. | Use Scenario: Generating 1.8V/6A supply for Intel Agilex FPGA-based 5G baseband processing units in compact fanless outdoor cabinets. IC Role / Device Role / Timing Role: High-efficiency, high-frequency buck converter synchronized across multiple phases to suppress beat frequencies in dense RF layouts. Use Value: 5MHz max switching frequency enables use of 0805-size 100nH inductors and 22µF ceramic output caps, achieving 92% efficiency in <100mm² footprint. |
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 from Monolithic Power Systems | 4.5V–16V input range; 8A max output; no integrated hot-loop caps; requires external bootstrap diode. | Targeted at higher-input industrial rails; lacks AEC-Q100 qualification and remote sense accuracy. | Select when input exceeds 5.5V or cost sensitivity outweighs EMI/thermal advantages of LTC3310SEV#TRMPBF. |
| TPS546D24RQFR from Texas Instruments | 4.5V–18V input; 60A scalable via PMBus; uses D-CAP3 control; no Silent Switcher EMI mitigation. | Designed for server VR13/IMVP9 compliance; requires external PMBus host and complex loop compensation. | Choose for digital power management in datacenter CPUs/GPUs where telemetry and dynamic voltage scaling are mandatory. |
Compared with MP2964GQ-Z and TPS546D24RQFR, the LTC3310SEV#TRMPBF delivers superior EMI performance in compact 3mm × 3mm footprint, supports lower VIN (2.25V), and guarantees ±1% accuracy with remote sensing-making it optimal for space-constrained, noise-sensitive, and automotive-grade applications where analog simplicity and robustness are prioritized over digital configurability.
Availability
LTC3310SEV#TRMPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA core supplies, industrial PLCs, and 5G baseband processors requiring stable component supply, AEC-Q100 compliance, and ultralow EMI performance.
Supply support for LTC3310SEV#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, communications, and industrial markets since 1965.
The LTC3310SEV#TRMPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, low-EMI DC/DC converters designed specifically for demanding automotive, computing, and telecom applications where thermal density and electromagnetic compatibility are critical.
FAQ
What is the maximum output current capability of the LTC3310SEV#TRMPBF?
The LTC3310SEV#TRMPBF delivers up to 10A continuous output current when properly thermally managed on a 4-layer PCB with ≥400mm² copper pour connected to the exposed PGND pad. Peak current capability reaches 18.5A before top-switch current limiting activates, but sustained operation above 10A requires derating based on ambient temperature and airflow.
Does the LTC3310SEV#TRMPBF require external bypass capacitors on the VIN pins?
No-the LTC3310SEV#TRMPBF integrates internal hot-loop bypass capacitors between VIN and PGND, and VIN and AGND, eliminating the need for external high-frequency ceramic capacitors typically required in Silent Switcher 1 designs. This reduces component count and improves EMI performance without compromising layout flexibility.
How does the LTC3310SEV#TRMPBF achieve AEC-Q100 qualification?
The LTC3310SEV#TRMPBF achieves AEC-Q100 Grade E qualification through rigorous stress testing-including 1000-hour high-temperature operating life (HTOL), 1000-cycle temperature cycling (TC), and human-body-model ESD up to ±2kV-performed on the exact wafer lot and package assembly used for automotive-grade shipments, ensuring reliability in under-hood environments up to +125°C junction temperature.
Can the LTC3310SEV#TRMPBF operate with an input voltage as low as 2.25V?
Yes-the LTC3310SEV#TRMPBF is fully specified to operate from 2.25V to 5.5V input. At 2.25V, the PMOS RDS(ON) increases, requiring careful thermal design; efficiency remains >85% at 1.2V/5A output. The 100% duty cycle capability allows regulation even when VIN approaches VOUT, making it ideal for single-cell Li-ion and supercapacitor backup systems.
What is the function of the SSTT pin on the LTC3310SEV#TRMPBF?
The SSTT pin on the LTC3310SEV#TRMPBF serves three functions: (1) soft-start timing via external capacitor charge; (2) voltage tracking during startup for power sequencing; and (3) die temperature monitoring (4mV/°C) after startup. During faults like output short-circuit, SSTT is pulled low to initiate automatic recovery with controlled soft-start re-ramp.
LTC3310SEV#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)
LTC3310SEV#TRMPBF FAQ
1.How can I place an order for LTC3310SEV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310SEV#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 LTC3310SEV#TRMPBF reliable?
The price and inventory of LTC3310SEV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310SEV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3310SEV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310SEV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310SEV#TRMPBF?
LTC3310SEV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310SEV#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 LTC3310SEV#TRMPBF?
For technical support, including LTC3310SEV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310SEV#TRMPBF requirements.
6.How does Aetrix verify that LTC3310SEV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310SEV#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 LTC3310SEV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3310SEV#TRMPBF?
All LTC3310SEV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310SEV#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 LTC3310SEV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3310SEV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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