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Analog Devices Inc. LTC3310HV#PBF
- Part No.:
- LTC3310HV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310HV#PBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:603
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Product details
Overview
LTC3310HV#PBF from Analog Devices is a high-reliability, monolithic synchronous step-down DC/DC converter rated for 10A output current, operating from 2.25V to 5.5V input and delivering adjustable 0.5V–VIN output with ±1% accuracy using remote sense. It employs Silent Switcher 2 architecture with integrated hot-loop bypass capacitors, supports up to 5MHz switching frequency, and features 100% duty cycle operation for low-dropout performance in automotive power rail applications.
For engineers reviewing the LTC3310HV#PBF datasheet, LTC3310HV#PBF pinout, LTC3310HV#PBF application, or LTC3310HV#PBF equivalent, this page delivers verified technical context on its AEC-Q100 qualified 150°C junction temperature operation, peak current mode control, programmable soft-start, die temperature monitoring, and multi-phase paralleling capability - all critical for high-density POL designs in servers, telecom, and automotive ECUs.
Technical Context
The LTC3310HV#PBF implements constant-frequency peak current mode control with a 500mV internal reference and 35ns minimum on-time, enabling stable regulation at ultra-low output voltages (e.g., 0.5V) and fast transient response under dynamic load steps. Its error amplifier transconductance is 400µS (LTC3310S variant), and it supports active voltage positioning only in fixed-output variants (LTC3310-1/HV-1), not in the adjustable LTC3310HV#PBF.
Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors to minimize EMI without external ceramic placement constraints. The device tolerates inductor saturation during overload via valley-current limiting (IVALLEYMAX = 10–14A), and thermal shutdown activates above 150°C junction temperature - consistent with its H-grade –40°C to 150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports wide-input battery and intermediate bus systems including 3.3V and 5V rails. |
| VOUT Range | 0.5V to VIN - enables direct core supply for modern FPGAs, ASICs, and µPs requiring sub-1V operation. |
| Output Accuracy | ±1% with remote sense - ensures tight regulation despite PCB trace resistance between IC and load. |
| Switching Frequency | Programmable 0.5MHz to 5MHz via RT resistor - allows optimization of size (higher fSW) vs. efficiency (lower fSW). |
| Top/Bottom RDS(ON) | 16mΩ / 4.5mΩ - enables high efficiency (>90% at 10A, 3.3V→1.2V) and low thermal dissipation. |
| Junction Temp Range | –40°C to +150°C - qualified per AEC-Q100 Grade H for under-hood automotive and industrial environments. |
| Shutdown Current | 1µA - minimizes standby power loss in always-on systems such as telematics and ADAS modules. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJCbottom = 9°C/W, thermally enhanced for high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input with precision threshold | 400mV rising threshold with 60mV hysteresis - enables accurate power sequencing and brown-out protection. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for feedback divider - 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 improve thermal spreading; must be shorted and locally bypassed to PGND. |
| PGND (5,10,19) | Power ground return path | Exposed pad (Pin 19) is PGND - requires soldering to large PCB ground plane with multiple vias for thermal and EMI control. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins connect directly to inductor - minimize loop inductance and EMI in high-dI/dt paths. |
| MODE/SYNC (13) | Multi-phase sync or mode selection | Accepts external clock (0.5–2.25MHz) or configures pulse-skip/forced continuous mode - no external pull-up required. |
| PGOOD (14) | Open-drain power-good indicator | Asserts after 100µs delay when VOUT reaches 97–99% of target - enables safe system power sequencing. |
| RT (15) | Oscillator frequency programming | Resistor to AGND sets fSW; RT = 274kΩ yields 2MHz typical - enables precise timing control and phase alignment. |
| SSTT (16) | Soft-start, tracking, temp monitor | 10µA current source for soft-start capacitor; transitions to 4mV/°C temp sensing post-startup - replaces discrete thermal sensor. |
| ITH (17) | Current limit and loop compensation | Internal node for error amplifier output - connects to AGND via RC network to stabilize control loop across load conditions. |
| FB (18) | Feedback voltage input | Regulated to 500mV - used with external resistor divider to set VOUT; supports remote sensing via AGND connection. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN–PGND and VIN–AGND bypass capacitors eliminate layout-sensitive external ceramics and reduce radiated EMI by >30dB vs. SS1. |
| 100% duty cycle operation | Enables dropout regulation down to VIN ≈ VOUT + IOUT × RDS(ON)_PMOS - critical for battery-powered systems near end-of-discharge. |
| Configurable multi-phase paralleling | MODE/SYNC pin supports master-slave synchronization of up to 4 converters - scales output current to 40A without external controllers. |
| Dual overcurrent protection | Peak switch current limit (14.5–18.5A) + valley current limit (10–14A) - prevents MOSFET failure during short-circuit and inductor saturation events. |
| Die temperature monitoring | SSTT pin provides 4mV/°C analog output post-soft-start - enables real-time thermal margining and predictive derating in sealed enclosures. |
Applications
| Automotive ADAS Power Supply | Server Core Voltage Regulator |
|---|---|
Use Scenario: Powers image signal processor (ISP) and radar SoC in automotive camera module with strict EMI limits per CISPR 25 Class 5. IC Role / Device Role / Timing Role: Primary 1.2V/10A POL regulator with Silent Switcher 2 EMI suppression and AEC-Q100 H-grade reliability. Use Value: Meets automotive radiated emissions without external EMI filters, reducing BOM cost and board area by 35% vs. legacy solutions. |
Use Scenario: Delivers tightly regulated 0.85V core voltage to high-performance Xeon® CPU in 1U server with dynamic load steps up to 8A/µs. IC Role / Device Role / Timing Role: Fast-transient, current-mode buck controller with 35ns min on-time and remote sensing for <1% output deviation. Use Value: Maintains ±10mV regulation during 10A load transients, eliminating need for oversized bulk capacitance and lowering total solution cost. |
| Industrial PLC I/O Module | 5G Baseband Radio PSU |
Use Scenario: Supplies 3.3V/5A to isolated digital I/O channels in harsh factory-floor environment with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: High-temp-rated DC/DC converter with 150°C junction rating and thermal shutdown for uncooled enclosure operation. Use Value: Sustains full 10A output at 85°C ambient without derating, enabling fanless design and improving long-term field reliability. |
Use Scenario: Generates 1.8V/6A bias for RF front-end MMICs in massive MIMO active antenna unit with stringent spectral purity requirements. IC Role / Device Role / Timing Role: Low-noise, high-efficiency buck converter synchronized to baseband clock to avoid heterodyne interference. Use Value: MODE/SYNC pin locks switching frequency to system clock, preventing beat frequencies in sensitive RF bands and simplifying EMC validation. |
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 | 10A, 2.7–16V input, integrated inductor, 1.5MHz fixed frequency, no remote sense or AVP. | Targeted at space-constrained consumer/portable designs; lacks AEC-Q100 qualification and thermal monitoring. | Select when board area is primary constraint and automotive qualification is unnecessary. |
| TPS546D24A | 10A, 3–16V input, PMBus interface, 400kHz–2MHz programmable frequency, 0.5% accuracy, no Silent Switcher EMI mitigation. | Designed for digitally controlled data center supplies; requires external EMI filtering for automotive use. | Select when telemetry, fault logging, or dynamic voltage scaling via PMBus are required. |
Compared with MPM3695-100 and TPS546D24A, the LTC3310HV#PBF uniquely combines AEC-Q100 Grade H qualification, Silent Switcher 2 EMI performance, remote sensing, and die temperature monitoring - making it the only choice for safety-critical automotive and thermally constrained industrial POL applications demanding both reliability and low noise.
Availability
LTC3310HV#PBF is available at Aetrix Electronics and suitable for automotive ADAS modules, server CPU core supplies, and industrial PLC I/O systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3310HV#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 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 LTC3310HV#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, low-EMI DC/DC converters designed specifically for demanding automotive, telecom, and computing applications where thermal robustness and electromagnetic compatibility are non-negotiable.
FAQ
What is the maximum output current capability of the LTC3310HV#PBF?
The LTC3310HV#PBF is rated for continuous 10A output current under specified thermal conditions. Its top switch current limit is 14.5–18.5A and bottom switch valley limit is 10–14A, allowing safe operation into short-circuit and overload conditions. Derating may be required above 85°C ambient depending on PCB copper area and airflow - refer to the thermal design guidelines in the LTC3310HV#PBF datasheet for layout-dependent current limits.
Does the LTC3310HV#PBF support remote voltage sensing?
Yes, the LTC3310HV#PBF supports true remote voltage sensing via its dedicated AGND pin, which serves as the Kelvin return for the FB resistive divider. This allows compensation for up to ±100mV ground potential difference between the IC's local ground and the load, ensuring ±1% output accuracy even with significant PCB trace resistance - a key requirement for high-current, low-voltage FPGA and ASIC core supplies.
How does the Silent Switcher 2 architecture in the LTC3310HV#PBF reduce EMI?
The LTC3310HV#PBF integrates internal bypass capacitors between VIN–PGND and VIN–AGND, forming compact, low-inductance hot loops that minimize radiated emissions. Combined with symmetrical SW pin layout and optimized internal routing, this achieves >30dB lower peak radiated EMI than first-generation Silent Switcher devices - enabling compliance with CISPR 25 Class 5 without external EMI filters in most automotive implementations.
Can the LTC3310HV#PBF be synchronized to an external clock?
Yes, the MODE/SYNC pin of the LTC3310HV#PBF accepts an external square-wave clock (0.5–2.25MHz) to synchronize switching frequency. Upon detection, an internal PLL locks the top switch turn-on edge to the rising edge of the external signal. The device automatically adapts slope compensation and operates in pulse-skip mode during sync - essential for noise-sensitive systems like RF transceivers and high-speed ADCs.
What is the purpose of the SSTT pin on the LTC3310HV#PBF?
The SSTT pin on the LTC3310HV#PBF serves three functions: (1) soft-start timing via 10µA current source charging an external capacitor; (2) voltage tracking during startup to coordinate with other rails; and (3) post-startup die temperature monitoring at 4mV/°C. During faults or shutdown, SSTT is pulled low to initiate recovery - making it a multifunction node that replaces discrete sequencing and thermal sensors in compact designs.
LTC3310HV#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:
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3310HV#PBF FAQ
1.How can I place an order for LTC3310HV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310HV#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#PBF reliable?
The price and inventory of LTC3310HV#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3310HV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310HV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310HV#PBF?
LTC3310HV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310HV#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#PBF?
For technical support, including LTC3310HV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310HV#PBF requirements.
6.How does Aetrix verify that LTC3310HV#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3310HV#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3310HV#PBF?
All LTC3310HV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310HV#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#PBF part is unused and in its original packaging.
Return procedure for LTC3310HV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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