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Analog Devices Inc. LTC3310HV#WTRPBF
- Part No.:
- LTC3310HV#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310HV#WTRPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,680
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Product details
Overview
LTC3310HV#WTRPBF from Analog Devices is a monolithic, Silent Switcher 2 synchronous step-down DC/DC converter delivering up to 10A output current from 2.25V–5.5V input, featuring 4.5mΩ NMOS and 16mΩ PMOS switches, ±1% VOUT accuracy with remote sense, and 35ns minimum on-time. It operates in automotive-grade –40°C to 150°C junction temperature range and supports programmable switching frequency up to 5MHz for high-density POL applications.
For engineers reviewing the LTC3310HV#WTRPBF datasheet, LTC3310HV#WTRPBF pinout, LTC3310HV#WTRPBF application, or LTC3310HV#WTRPBF equivalent, this page delivers verified technical context, validated pin functions, real-world EMI performance data (CISPR25 Class 5 compliant), and precise selection guidance for automotive power systems requiring low-noise, high-efficiency 10A core supplies.
Technical Context
The LTC3310HV#WTRPBF employs constant-frequency peak current mode control with internal hot-loop bypass capacitors for ultralow EMI and fast transient response. Its Silent Switcher 2 architecture integrates VIN-to-AGND and VIN-to-PGND ceramic bypass caps, eliminating external high-frequency decoupling requirements.
It supports three operational modes via MODE/SYNC: pulse-skipping for light-load efficiency, forced continuous conduction for low-noise output, and external clock synchronization. The device includes active voltage positioning (AVP) only in -1 variants, but LTC3310HV#WTRPBF is the adjustable-output version without AVP-confirmed by part marking "HV" and absence of fixed-VOUT specification in its electrical characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports wide-input battery-supplied systems including 3.3V and 5V rails with margin for droop. |
| VOUT Range | 0.5V to VIN - enables direct regulation down to sub-1V FPGA/ASIC core supplies without external LDO post-regulation. |
| Output Accuracy | ±1% with remote sense - maintains tight regulation despite PCB trace resistance between IC and load. |
| Switch RDS(ON) | 4.5mΩ (NMOS), 16mΩ (PMOS) - minimizes conduction loss at 10A, enabling >90% efficiency at 3.3V→1.2V conversion. |
| Min On-Time | 35ns - allows stable operation at high switching frequencies (up to 5MHz) and high VIN/VOUT ratios (e.g., 5V→1.2V). |
| Shutdown Current | 1µA - ensures ultra-low system standby power in always-on automotive modules. |
| Junction Temp Range | –40°C to +150°C - qualified per AEC-Q100 Grade H, suitable for under-hood and engine-control unit deployments. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed thermal pad (Pin 19 = PGND). Thermally enhanced design achieves θJCbottom = 9°C/W for high-power density operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control with precision threshold | 400mV rising threshold with 60mV hysteresis - enables accurate power sequencing and brown-out protection using resistor divider from VIN. |
| 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, ensuring ±1% regulation accuracy. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce IR drop and inductance - must be shorted together and bypassed locally to PGND with low-ESR ceramics. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal and current return path - requires large copper area and multiple vias to PCB ground plane. |
| SW (6–9) | Switch node output | Four paralleled SW pins drive external inductor - minimize switching loop inductance critical for Silent Switcher 2 EMI performance. |
| MODE/SYNC (13) | Mode selection & clock interface | Configures pulse-skip/forced-CCM or accepts/synchronizes to external clock (0.5–2.25MHz); also sets multiphase phase offset. |
| PGOOD (14) | Power-good open-drain output | Asserts high when VOUT is within 97–99% of target - provides system-level power sequencing and fault indication with 100µs delay. |
| RT (15) | Oscillator frequency programming | Resistor to AGND sets fSW from 0.5MHz to 5MHz - RT = 274kΩ yields 2MHz typical, enabling optimal trade-off between size and efficiency. |
| SSTT (16) | Soft-start, tracking, temp monitor | 10µA current source for soft-start capacitor; tracks FB during startup; settles to ~4mV/°C voltage post-startup for die temperature monitoring. |
| ITH (17) | Current limit and loop compensation | Error amplifier output node - connects to AGND via RC network to set bandwidth, phase margin, and peak current limit slope. |
| FB (18) | Feedback input (adjustable version) | Regulated to 500mV - used with external resistor divider to set VOUT; internal error amp transconductance = 400µS. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 Architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors eliminate external high-frequency ceramic placement constraints and reduce radiated EMI to CISPR25 Class 5 limits. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VIN ≈ VOUT - critical for automotive cold-crank scenarios where input may dip to 2.25V while powering 1.2V loads. |
| Configurable Multiphase Support | MODE/SYNC pin enables precise phase alignment across parallel LTC3310HV#WTRPBF units - scales output current beyond 10A without increasing ripple or thermal density. |
| Dual-Ground Sensing (AGND + PGND) | Separate analog ground (AGND) and power ground (PGND) paths prevent noise coupling into feedback loop - preserves ±1% regulation under high di/dt load transients. |
| Robust Fault Protection | Includes output overvoltage (106–112.5% VOUT), thermal shutdown, output short-circuit recovery via SSTT-initiated soft-start, and valley-current limiting to prevent inductor saturation. |
Applications
| Automotive ADAS Camera Module | Industrial PLC CPU Core Supply |
|---|---|
|
Use Scenario: Powering 1.2V core rail of SoC in rear-view camera ECU operating in under-hood environment with ambient up to 105°C and input voltage varying from 4.5V (run) to 2.8V (cold crank). IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated 1.2V/10A with remote sensing and thermal derating capability. Use Value: Silent Switcher 2 EMI performance avoids interference with image sensor analog front-end; 150°C junction rating ensures reliability without forced air cooling. |
Use Scenario: Generating 0.85V/8A core supply for ARM Cortex-A series processor in DIN-rail mounted programmable logic controller with strict EMC compliance requirements. IC Role / Device Role / Timing Role: High-efficiency POL converter synchronized to system clock via MODE/SYNC to suppress beat frequencies in multi-rail systems. Use Value: 35ns min on-time enables stable 0.85V output from 3.3V input at 2MHz; programmable frequency avoids noise bands in sensitive analog I/O sections. |
| 5G Small Cell Baseband ASIC | Medical Imaging FPGA Power |
|
Use Scenario: Delivering 0.95V/10A to baseband ASIC in compact 5G small cell radio unit with limited board space and stringent thermal budget. IC Role / Device Role / Timing Role: Compact 3mm × 3mm LQFN step-down converter with integrated bypass caps reducing required BOM count by two 100nF ceramics. Use Value: 4.5mΩ NMOS RDS(ON) limits conduction loss to <350mW at full load, enabling natural convection cooling in sealed enclosure. |
Use Scenario: Supplying 1.0V/9A to Xilinx Kintex Ultrascale+ FPGA in portable ultrasound imaging device requiring low-noise, low-EMI power with fast transient response. IC Role / Device Role / Timing Role: Fast-transient current-mode regulator with 500mV reference and 10A capability supporting dynamic partial reconfiguration. Use Value: ±1% remote-sense accuracy ensures timing margin integrity across FPGA I/O banks; PGOOD signal enables safe configuration handshaking. |
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 | Fixed 10A current limit; no remote sense (AGND); 2.7V–16V VIN; 0.6V–5.5V VOUT; QFN-24 package (4mm × 4mm) | Broader input range but lacks Kelvin sensing - less accurate under high-current PCB trace IR drop. | Select when input exceeds 5.5V or board space allows larger 4mm package; avoid where ±1% remote-sense accuracy is mandatory. |
| TPS546D24A | Pin-compatible 10A buck with PMBus interface; 3.0V–18V VIN; 0.5V–5.5V VOUT; supports AVS and telemetry; 3.5mm × 4.5mm package | Digitally configurable via I²C - adds telemetry and dynamic voltage scaling not present in LTC3310HV#WTRPBF. | Choose when system requires closed-loop voltage margining, real-time temperature reporting, or firmware-based fault logging. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310HV#WTRPBF uniquely combines AEC-Q100 Grade H qualification, Silent Switcher 2 EMI performance, and true remote-sense accuracy in a 3mm × 3mm footprint - making it optimal for space-constrained, safety-critical automotive and industrial applications where analog precision and regulatory compliance are non-negotiable.
Availability
LTC3310HV#WTRPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial PLCs, and 5G baseband power systems requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LTC3310HV#WTRPBF 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#WTRPBF belongs to the Silent Switcher® 2 family of high-efficiency, low-EMI DC/DC converters designed specifically for demanding automotive and industrial applications where thermal density, electromagnetic compatibility, and functional safety are critical.
FAQ
What is the maximum output current capability of the LTC3310HV#WTRPBF?
The LTC3310HV#WTRPBF is rated for up to 10A continuous output current under proper thermal conditions - confirmed by datasheet Typical Application circuit (1.2V/10A), absolute maximum ratings, and efficiency curves showing stable operation at 10A load. Derating is required above 125°C junction temperature per thermal characteristics.
Does the LTC3310HV#WTRPBF support remote voltage sensing?
Yes, the LTC3310HV#WTRPBF supports true remote voltage sensing via its dedicated AGND pin (Pin 2), which serves as the Kelvin return for the FB resistor divider. This allows compensation for up to ±100mV ground potential difference between the IC and load, ensuring ±1% output voltage accuracy even with significant PCB trace resistance.
What package type and thermal characteristics does the LTC3310HV#WTRPBF use?
The LTC3310HV#WTRPBF uses an 18-lead 3mm × 3mm LQFN package with exposed thermal pad (Pin 19 = PGND). Its thermal metrics include θJCbottom = 9°C/W and θJA = 42°C/W - enabling high-power density designs when mounted on 2oz copper with ≥6 thermal vias to inner ground planes.
Can the LTC3310HV#WTRPBF be synchronized to an external clock?
Yes, the LTC3310HV#WTRPBF supports external clock synchronization via the MODE/SYNC pin (Pin 13). When driven with a square wave (0.5–2.25MHz), it locks its internal oscillator using a PLL - enabling deterministic switching alignment across multiple converters and elimination of beat frequencies in multi-rail systems.
Is the LTC3310HV#WTRPBF qualified for automotive applications?
Yes, the LTC3310HV#WTRPBF is AEC-Q100 qualified for automotive applications (Grade H, –40°C to +150°C junction temperature) and designated with the "W" suffix per Analog Devices' ordering nomenclature - confirming controlled manufacturing, extended temperature validation, and automotive reliability reporting availability.
LTC3310HV#WTRPBF 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)
LTC3310HV#WTRPBF FAQ
1.How can I place an order for LTC3310HV#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310HV#WTRPBF 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#WTRPBF reliable?
The price and inventory of LTC3310HV#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310HV#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310HV#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310HV#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310HV#WTRPBF?
LTC3310HV#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310HV#WTRPBF 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#WTRPBF?
For technical support, including LTC3310HV#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310HV#WTRPBF requirements.
6.How does Aetrix verify that LTC3310HV#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310HV#WTRPBF 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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310HV#WTRPBF?
All LTC3310HV#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310HV#WTRPBF, 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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3310HV#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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