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Analog Devices Inc. LTC3310HV#WPBF
- Part No.:
- LTC3310HV#WPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310HV#WPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:346
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Product details
Overview
LTC3310HV#WPBF from Analog Devices is a high-reliability, monolithic synchronous step-down DC/DC converter delivering up to 10A output current from a 2.25V–5.5V input. It employs Silent Switcher 2 architecture with internal VIN-to-PGND and VIN-to-AGND bypass capacitors, achieves ≤35ns minimum on-time, supports programmable switching frequency up to 5MHz, and operates across –40°C to 150°C junction temperature for automotive-grade power delivery in FPGA core supplies.
For engineers reviewing the LTC3310HV#WPBF datasheet, LTC3310HV#WPBF pinout, LTC3310HV#WPBF application, or LTC3310HV#WPBF equivalent, key selection criteria include its AEC-Q100 qualification, 16mΩ PMOS / 4.5mΩ NMOS RDS(ON), ±1% VFB accuracy with remote sense, 100% duty cycle dropout capability, and thermally enhanced 3mm × 3mm LQFN package with exposed PGND pad.
Technical Context
The LTC3310HV#WPBF implements constant-frequency peak current mode control with an internal 500mV reference (LTC3310S variant) and supports both pulse-skipping and forced continuous modes via MODE/SYNC pin configuration. Its Silent Switcher 2 architecture integrates hot-loop bypass capacitors to minimize EMI while enabling high-efficiency operation at 2MHz–5MHz switching frequencies.
It features dual overcurrent protection: top-switch current limit (14.5A–18.5A) and bottom-switch valley current limit (10A–14A), plus output overvoltage protection (106%–112.5% of VOUT), precision enable threshold (400mV ±25mV), and die temperature monitoring via SSTT pin (4mV/°C slope).
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 Accuracy | ±1% with remote sense - ensures stable core voltage under PCB trace resistance-induced ground offsets up to ±100mV. |
| Max Output Current | 10A - delivers full-rated load with thermal derating only above 125°C ambient in typical 4-layer PCB layout. |
| Switching Frequency | 0.5MHz to 5MHz (RT-programmable) - enables compact magnetics and low-profile inductors like XEL4030-101ME (100nH). |
| RDS(ON) Top/Bottom | 16mΩ PMOS / 4.5mΩ NMOS - minimizes conduction loss at 10A, yielding >90% efficiency at 3.3VIN/1.2VOUT. |
| Junction Temp Range | –40°C to 150°C - qualified per AEC-Q100 Grade H, suitable for under-hood automotive and industrial edge computing environments. |
| Shutdown Current | 1µA - enables ultra-low-power system sleep states without compromising fast wake-up response. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, θJCbottom = 9°C/W. Exposed pad must be soldered to PCB ground plane using ≥9 thermal vias for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | Precision 400mV threshold with 60mV hysteresis; direct tie to VIN enables always-on operation. |
| AGND (2) | Remote feedback ground | Kelvin connection point for FB divider low-side; rejects PCB IR drop between IC and load ground. |
| VIN (3,4,11,12) | Main power input | Four parallel pins reduce impedance; require local 22µF ceramic + 0.1µF bypass to PGND per pair. |
| PGND (5,10,19) | Power ground return | Three dedicated pins + exposed pad form primary thermal path; must connect directly to solid ground plane. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins drive external inductor; require short, wide copper traces to minimize ringing. |
| MODE/SYNC (13) | Frequency control interface | Configures pulse-skip/forced-CCM mode or synchronizes to external clock (0.5–2.25MHz input range). |
| PGOOD (14) | Output regulation monitor | Open-drain signal asserts low when VOUT deviates >3% from target or during fault conditions. |
| RT (15) | Oscillator timing | Resistor to AGND sets fSW; 274kΩ yields 2MHz nominal frequency with ±10% tolerance. |
| SSTT (16) | Soft-start/track/temp monitor | 10µA current charges external capacitor for controlled VOUT ramp; transitions to die temp readout (4mV/°C) post-startup. |
| ITH (17) | Loop compensation node | Connects RC network to AGND to stabilize error amplifier; critical for transient response tuning. |
| FB (18) | Feedback input | Regulates to 500mV; requires resistive divider from VOUT - RA/RB ratio sets output voltage per equation (1). |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN-to-PGND and VIN-to-AGND bypass capacitors reduce EMI emissions by >30dB vs. Silent Switcher 1, meeting CISPR 25 Class 5 radiated limits without external filters. |
| 100% Duty Cycle Operation | Enables dropout operation down to VIN = VOUT + ILOAD × RDS(ON)_PMOS, supporting brownout resilience in battery-powered systems. |
| Configurable Multi-Phase Support | MODE/SYNC pin enables seamless paralleling of up to 4 LTC3310HV#WPBF units with interleaved 90° phase shifts for ripple cancellation and thermal balancing. |
| Dual Overcurrent Protection | Peak current limit (14.5–18.5A) prevents switch destruction during overload; valley current limit (10–14A) safeguards against inductor saturation faults. |
| AEC-Q100 Grade H Qualification | Validated for –40°C to 150°C operation with HTOL, TC, and ESD testing - certified for automotive powertrain and ADAS domain controllers. |
Applications
| Automotive ADAS Power Supply | FPGA Core Voltage Regulator |
|---|---|
Use Scenario: Powers image signal processor (ISP) and radar SoC in front-camera module requiring clean 1.2V/10A rail with minimal conducted/radiated noise. IC Role / Device Role / Timing Role: Primary POL converter with integrated Silent Switcher 2 EMI suppression and PGOOD sequencing for ASIL-B subsystems. Use Value: Eliminates need for external EMI filters, reduces BOM count by 3 components, and meets ISO 11452-2/2015 immunity requirements. | Use Scenario: Supplies configurable logic core voltage for Xilinx Zynq UltraScale+ MPSoC in industrial gateway, dynamically scaling from 0.85V to 1.2V. IC Role / Device Role / Timing Role: High-bandwidth current-mode regulator with 35ns min-on-time enabling fast load transient response (<50µs recovery from 1A→9A step). Use Value: Maintains <±25mV output deviation during 1A/µs slew-rate transients, reducing required bulk capacitance by 40%. |
| Telecom Baseband Processor Rail | Industrial PLC CPU Power |
Use Scenario: Generates 0.95V/8A supply for 5G baseband ASIC in outdoor small cell unit operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Automotive-grade buck converter with remote sensing and active voltage positioning (AVP) for dynamic load-line optimization. Use Value: AVP reduces output capacitor count by 2× through intentional VOUT droop at full load, improving transient headroom. | Use Scenario: Delivers 1.1V/6A to ARM Cortex-A53 CPU in DIN-rail mounted PLC controller with extended temperature cycling. IC Role / Device Role / Timing Role: Thermally robust DC/DC with 150°C max junction rating and die temperature monitoring via SSTT pin. Use Value: Enables predictive thermal throttling and lifetime estimation via real-time junction temperature telemetry. |
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 |
|---|---|---|---|
| MP2451DT-LF-Z | Lower current rating (0.6A), no remote sense, no Silent Switcher EMI mitigation, 2.5V–36V input range. | Targeted at low-power industrial sensors, not high-current POL or automotive use. | Select only for cost-sensitive, non-automotive, sub-1A applications where EMI is unregulated. |
| TPS546D24RQFT | 60A multi-phase controller (not monolithic), requires external FETs, supports PMBus, 4.5V–18V input. | Used in server VR13/VR14 applications with digital power management requirements. | Choose when system-level digital control, higher current scalability (>10A), or PMBus telemetry is mandatory. |
Compared with MP2451DT-LF-Z and TPS546D24RQFT, the LTC3310HV#WPBF uniquely combines monolithic 10A integration, AEC-Q100 Grade H qualification, Silent Switcher 2 EMI performance, and 2.25V–5.5V input range - making it optimal for space-constrained, high-reliability automotive and industrial POL designs where board area and thermal margin are critical.
Availability
LTC3310HV#WPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial PLC CPU power, and 5G telecom baseband processors requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LTC3310HV#WPBF 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, industrial automation, communications, and automotive markets.
The LTC3310HV#WPBF belongs to Analog Devices' Silent Switcher 2 power management product line, engineered specifically for high-current, low-EMI point-of-load conversion in safety-critical automotive and harsh-environment industrial systems.
FAQ
What is the maximum output current capability of the LTC3310HV#WPBF under continuous operation?
The LTC3310HV#WPBF delivers up to 10A of continuous output current when mounted on a standard 4-layer PCB with adequate copper area and thermal vias. Derating begins above 125°C ambient due to its –40°C to 150°C junction temperature rating; actual sustained current depends on layout, airflow, and input/output voltage differentials. The device includes dual overcurrent protection (peak and valley limits) to safeguard operation during transient overloads.
Does the LTC3310HV#WPBF support remote voltage sensing, and how is it implemented?
Yes, the LTC3310HV#WPBF supports true remote voltage sensing via its dedicated AGND pin. The AGND pin serves as the Kelvin return for the FB resistor divider's low-side node and is internally referenced to the error amplifier. This configuration compensates for PCB trace resistance between the IC's local ground and the load's ground point, maintaining ±1% VOUT accuracy even with up to ±100mV ground offset - essential for high-current FPGA and ASIC core supplies.
How does the Silent Switcher 2 architecture in the LTC3310HV#WPBF reduce EMI compared to conventional buck converters?
The LTC3310HV#WPBF integrates internal bypass capacitors between VIN–PGND and VIN–AGND, minimizing high-di/dt loop area in the critical hot-switching path. Combined with symmetrical pin layout and differential SW node routing, this architecture suppresses common-mode EMI by >30dB versus Silent Switcher 1, enabling compliance with CISPR 25 Class 5 radiated emissions limits without external ferrite beads or LC filters - verified on the DC2629A demo board.
Can the LTC3310HV#WPBF be synchronized to an external clock, and what is the supported frequency range?
Yes, the LTC3310HV#WPBF can synchronize its internal oscillator to an external clock applied to the MODE/SYNC pin. It accepts square-wave inputs from 0.5MHz to 2.25MHz, locking switch turn-on to the rising edge of the external signal. During synchronization, the device automatically adapts slope compensation and operates in pulse-skip mode. Removal of the external clock is detected within 20µs, after which the oscillator returns to its default RT-set frequency.
What thermal management features does the LTC3310HV#WPBF provide for high-reliability automotive applications?
The LTC3310HV#WPBF includes die temperature monitoring via the SSTT pin (4mV/°C slope), overtemperature protection that activates above 150°C junction temperature, and a thermally enhanced 3mm × 3mm LQFN package with exposed PGND pad. Its AEC-Q100 Grade H qualification ensures reliability across –40°C to 150°C, and the θJCbottom = 9°C/W rating enables efficient heat transfer to the PCB ground plane when using ≥9 thermal vias - critical for under-hood deployment.
LTC3310HV#WPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®1
- Package/Case:
- 18-TFQFN Exposed Pad
- Packaging:
- Tray
- 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)
LTC3310HV#WPBF FAQ
1.How can I place an order for LTC3310HV#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310HV#WPBF 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 LTC3310HV#WPBF reliable?
The price and inventory of LTC3310HV#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310HV#WPBF is usually 5 days.
3.What payment methods are accepted for LTC3310HV#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310HV#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310HV#WPBF?
LTC3310HV#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310HV#WPBF 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 LTC3310HV#WPBF?
For technical support, including LTC3310HV#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310HV#WPBF requirements.
6.How does Aetrix verify that LTC3310HV#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310HV#WPBF 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 LTC3310HV#WPBF meets industry standards.
7.What is the process for return or replacement of LTC3310HV#WPBF?
All LTC3310HV#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310HV#WPBF, 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 LTC3310HV#WPBF part is unused and in its original packaging.
Return procedure for LTC3310HV#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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