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Analog Devices Inc. LTC3310HV-1#PBF
- Part No.:
- LTC3310HV-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310HV-1#PBF.pdf
- Description:
- IC REG BUCK 1V 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:624
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Product details
Overview
LTC3310HV-1#PBF 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, with fixed 1.0V output, ±1% accuracy over temperature, and AEC-Q100 qualification for automotive under-hood applications.
For engineers reviewing the LTC3310HV-1#PBF datasheet, LTC3310HV-1#PBF pinout, LTC3310HV-1#PBF application, or LTC3310HV-1#PBF equivalent, key selection considerations include its 18-lead 3mm × 3mm LQFN package, 35ns minimum on-time, 5MHz programmable switching frequency, integrated hot-loop bypass capacitors, and support for multiphase paralleling in high-current POL systems.
Technical Context
The LTC3310HV-1#PBF employs constant-frequency peak current mode control with internal 500mV reference (adjusted to 1.0V via internal resistor divider), enabling fast transient response and precise regulation. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors to minimize EMI without external ceramic placement constraints.
It supports pulse-skipping or forced continuous conduction mode via MODE/SYNC pin, offers 100% duty cycle dropout operation, and includes active voltage positioning (AVP) with 2.4mV/A load-line slope for optimized FPGA/ASIC core supply transient performance and reduced output capacitance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.0V output with ±1% accuracy over –40°C to +150°C junction temperature - ensures stable core voltage for automotive microcontrollers under thermal stress. |
| IOUT Max | 10A continuous output current - supports high-power SoC and ADAS domain controllers without external power stage augmentation. |
| VIN Range | 2.25V to 5.5V input - compatible with 3.3V and 5V intermediate bus architectures and tolerant of automotive battery transients down to cold-crank conditions. |
| fSW Range | 0.5MHz to 5MHz programmable via RT pin - enables optimization between efficiency (lower fSW) and size (higher fSW) in space-constrained modules. |
| Min On-Time | 35ns minimum on-time - allows high step-down ratios (e.g., 5V→1V at 2MHz) while maintaining stable regulation and avoiding subharmonic oscillation. |
| Thermal Rating | Junction temperature range –40°C to +150°C - qualified per AEC-Q100 Grade H, suitable for engine control units and transmission control modules. |
| EMI Performance | CISPR 25 Class 5 compliant radiated emissions with integrated Silent Switcher 2 layout - eliminates need for external EMI filters in automotive infotainment and ADAS camera power rails. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJA = 42°C/W, thermally enhanced for high-current automotive operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input with precision threshold | 400mV rising threshold with 60mV hysteresis - enables clean startup sequencing and brown-out protection without external bias resistors. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for feedback divider - compensates for PCB trace IR drop up to ±100mV, ensuring accurate 1.0V regulation at load. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce impedance and thermal rise - required for 10A input current delivery and low-noise hot-loop routing. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins plus exposed pad - forms primary thermal and current return path; must be soldered to large internal ground plane. |
| SW (6–9) | Switch node outputs | Four paralleled switch terminals - minimizes trace inductance and voltage overshoot during 10A switching transitions. |
| MODE/SYNC (13) | Mode control / clock I/O | Configures pulse-skip vs. forced CCM and enables synchronization to external clock or multiphase interleaving. |
| PGOOD (14) | Open-drain power-good indicator | Asserts after soft-start completion when VOUT reaches 97–99% of 1.0V - provides system-level power sequencing signal with 100µs delay filtering. |
| RT (15) | Oscillator frequency programming | Resistor-to-AGND sets fSW from 0.5MHz to 5MHz - enables EMI spread-spectrum tuning and layout-driven frequency selection. |
| SSTT (16) | Soft-start / tracking / temp monitor | 10µA current source for soft-start capacitor; tracks FB during ramp-up; settles to 4mV/°C temp voltage post-startup. |
| ITH (17) | Current limit and loop compensation | Error amplifier output node - connects external RC network to AGND for stability tuning and current limit setting. |
| VOUT (18) | Fixed-output voltage sense | Internally regulated to 1.0V - eliminates external feedback resistors; used only in LTC3310HV-1 variant (not FB pin). |
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 constraints and reduce radiated EMI by >20dB vs. legacy buck converters. |
| AEC-Q100 Grade H Qualification | Validated for –40°C to +150°C operation with full electrical characterization - meets automotive under-hood reliability requirements without derating. |
| Active Voltage Positioning (AVP) | 2.4mV/A load-line slope - lowers output voltage under full load to offset IR drop and improve transient headroom, reducing required bulk capacitance by up to 30%. |
| 100% Duty Cycle Operation | Enables dropout operation down to VIN = VOUT + IOUT × RDS(ON)_PMOS - maintains regulation during automotive cold-crank (e.g., 2.25V input → 1.0V output @ 5A). |
| Configurable Multiphase Support | MODE/SYNC pin enables seamless interleaving of up to 6 phases - scales output current beyond 10A while reducing input/output ripple and thermal density. |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers 32-bit automotive microcontroller (e.g., NXP S32K3) and CAN transceivers in engine bay with ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Primary 1.0V core regulator with AVP and AEC-Q100 Grade H qualification, providing stable voltage under wide input transients and thermal cycling. Use Value: Eliminates need for external AVP circuitry and reduces output capacitor count by 2× versus non-AVP solutions, saving board space in sealed ECU enclosures. |
Use Scenario: Supplies image sensor and ISP in front-facing ADAS camera module mounted behind windshield, subject to solar heating and EMI-sensitive analog video paths. IC Role / Device Role / Timing Role: Low-EMI 1.0V POL regulator with Silent Switcher 2 and 5MHz capability - enables compact 2-layer PCB design without shielding cans. Use Value: Meets CISPR 25 Class 5 radiated limits without ferrite beads or LC filters, reducing BOM cost and improving thermal reliability in confined camera housings. |
| Industrial PLC CPU Module | 5G Small Cell Baseband Processor |
Use Scenario: Delivers 1.0V/8A to ARM Cortex-A series processor in DIN-rail mounted PLC with extended temperature (-40°C to +85°C) and vibration requirements. IC Role / Device Role / Timing Role: High-reliability synchronous buck with 150°C junction rating and robust short-circuit recovery - sustains operation during factory line voltage sags and motor switching noise. Use Value: Integrated thermal shutdown and valley-current limiting prevent latch-up during sustained overload, enabling maintenance-free operation over 10-year industrial lifecycle. |
Use Scenario: Powers baseband SoC (e.g., Qualcomm QDM5675) in outdoor 5G small cell unit requiring high efficiency at partial load and strict EMI compliance near RF front-end. IC Role / Device Role / Timing Role: Programmable 2–4MHz switching regulator with pulse-skipping mode - achieves >92% efficiency at 1A load while minimizing conducted noise coupling into adjacent RF sections. Use Value: RT-programmable frequency avoids critical RF bands (e.g., 3.5GHz n78), and MODE/SYNC pin enables synchronization to system clock for deterministic noise spectrum placement. |
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 1.0V output, 10A, 2.7–16V input, 3mm × 4mm QFN, no AVP or Silent Switcher 2 | Broader input range but higher EMI; lacks automotive temp grade and AVP - suited for industrial/commercial 12V intermediate bus | Select when input exceeds 5.5V or board space allows larger package; avoid for AEC-Q100 or CISPR 25 systems. |
| TPS546D24A | Adjustable 0.5–2.0V output, 10A, 3–16V input, 4mm × 4mm QFN, PMBus interface, no integrated AVP | Digital control and telemetry support; requires external AVP circuitry and has higher quiescent current - targets server VR13/VR14 compliance | Choose for telemetry-enabled systems needing dynamic voltage scaling; not drop-in for fixed 1.0V automotive designs. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310HV-1#PBF uniquely combines AEC-Q100 Grade H qualification, Silent Switcher 2 EMI suppression, and integrated AVP in a 3mm × 3mm footprint - making it the only solution meeting stringent automotive core rail requirements without compromise on size, thermal margin, or EMC certification effort.
Availability
LTC3310HV-1#PBF is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera modules, and industrial PLC CPU supplies requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3310HV-1#PBF 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 automotive, industrial, communications, and healthcare markets since 1965.
The LTC3310HV-1#PBF belongs to Analog Devices' Silent Switcher® 2 power management portfolio, engineered specifically for automotive and high-reliability embedded systems demanding ultra-low EMI, AEC-Q100 compliance, and high-current density in minimal PCB area.
FAQ
What is the operating temperature range for the LTC3310HV-1#PBF?
The LTC3310HV-1#PBF is rated for a junction temperature range of –40°C to +150°C and is qualified per AEC-Q100 Grade H. This makes it suitable for under-hood automotive applications such as engine control units and transmission control modules where ambient temperatures exceed 125°C. The device includes die temperature monitoring via the SSTT pin and thermal shutdown protection that activates above 165°C.
Does the LTC3310HV-1#PBF require external feedback resistors?
No, the LTC3310HV-1#PBF does not require external feedback resistors because it features a fixed 1.0V output configuration with internal resistor divider. Pin 18 is labeled VOUT (not FB), and regulation occurs directly at that pin. In contrast, the adjustable LTC3310HV uses the FB pin with external RA/RB dividers. This simplifies layout and improves accuracy by eliminating resistor tolerance and thermal drift effects.
How does Active Voltage Positioning (AVP) work in the LTC3310HV-1#PBF?
The LTC3310HV-1#PBF implements AVP with a fixed 2.4mV/A load-line slope: output voltage decreases linearly with increasing load current (e.g., 1.024V at 0A → 1.000V at 10A). This pre-biases the output to improve transient response and reduce required output capacitance. AVP is enabled automatically in the -1 variants and requires no external components - a key differentiator from non-AVP competitors.
Can the LTC3310HV-1#PBF be synchronized to an external clock?
Yes, the LTC3310HV-1#PBF supports external clock synchronization via the MODE/SYNC pin. When driven with a square wave (0.5–2.25MHz), the internal PLL locks to the external frequency within ~20µs. During sync, the device operates in pulse-skip mode and adapts slope compensation automatically. This feature enables deterministic EMI placement and multi-phase interleaving in systems with centralized timing sources.
What is the purpose of the AGND pin on the LTC3310HV-1#PBF?
The AGND pin on the LTC3310HV-1#PBF serves as the remote Kelvin sense reference for the output voltage feedback path. It must be connected directly to the negative terminal of the output capacitor at the load, not to the local PGND plane. This enables accurate 1.0V regulation despite PCB trace resistance, supporting up to ±100mV ground offset - critical for maintaining voltage accuracy in high-current automotive and industrial applications.
LTC3310HV-1#PBF 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 10A
- Frequency - Switching:
- 500kHz ~ 5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310HV-1#PBF FAQ
1.How can I place an order for LTC3310HV-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310HV-1#PBF 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-1#PBF reliable?
The price and inventory of LTC3310HV-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310HV-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3310HV-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310HV-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310HV-1#PBF?
LTC3310HV-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310HV-1#PBF 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-1#PBF?
For technical support, including LTC3310HV-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310HV-1#PBF requirements.
6.How does Aetrix verify that LTC3310HV-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3310HV-1#PBF 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-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3310HV-1#PBF?
All LTC3310HV-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310HV-1#PBF, 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-1#PBF part is unused and in its original packaging.
Return procedure for LTC3310HV-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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