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Analog Devices Inc. LTC3310HV#TRPBF
- Part No.:
- LTC3310HV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3310HV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 10A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,301
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Product details
Overview
LTC3310HV#TRPBF 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. It features 4.5mΩ NMOS and 16mΩ PMOS switches, 500mV reference voltage, 35ns minimum on-time, and operates up to 5MHz with programmable RT resistor. It is used in high-density FPGA core supplies requiring low EMI and fast transient response.
For engineers reviewing the LTC3310HV#TRPBF datasheet, LTC3310HV#TRPBF pinout, LTC3310HV#TRPBF application, or LTC3310HV#TRPBF equivalent, key selection criteria include its AEC-Q100-qualified H-grade (–40°C to +150°C), integrated hot-loop bypass capacitors, remote sense accuracy of ±1%, and support for multiphase paralleling in POL systems.
Technical Context
The LTC3310HV#TRPBF employs constant-frequency peak current mode control with internal error amplifier transconductance of 400µS (LTC3310S variant) and supports both pulse-skipping and forced continuous modes via MODE/SYNC pin configuration. Its Silent Switcher 2 architecture integrates VIN-to-PGND and VIN-to-AGND bypass capacitors to minimize EMI without external ceramic placement constraints.
It implements active voltage positioning only in -1 variants (not applicable to LTC3310HV#TRPBF), uses a 500mV FB reference for adjustable output (0.5V to VIN), and provides die temperature monitoring via SSTT pin with 4mV/°C slope - all within a thermally enhanced 3mm × 3mm LQFN package with exposed PGND pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, 3.3V, and 5V intermediate bus rails without external regulators. |
| Output Current | 10A continuous - enables single-chip core supply for mid-range FPGAs and ASICs without current sharing. |
| Switch RDS(ON) | 4.5mΩ (NMOS) / 16mΩ (PMOS) - minimizes conduction loss at high load, enabling >90% efficiency at 7.5A/1.2V. |
| Feedback Reference | 500mV ±1% with remote sense - ensures accurate regulation despite PCB ground bounce up to ±100mV. |
| Min On-Time | 35ns - allows stable 1.2V output from 3.3V input at 2MHz switching frequency (Duty ≈ 36%). |
| Junction Temp Range | –40°C to +150°C - qualified per AEC-Q100 Grade H for under-hood automotive and industrial high-temp environments. |
| Shutdown Current | 1µA - enables ultra-low power state in battery-backed or always-on systems. |
Pinout & Package
Package: 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), θJCbottom = 9°C/W, requiring soldered thermal connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control with precision threshold | 400mV rising threshold with 60mV hysteresis - enables reliable UVLO-based sequencing without external bias resistors. |
| AGND (2) | Remote feedback ground sense | Kelvin connection point for FB divider low-side - rejects up to ±100mV ground offset between IC and load. |
| VIN (3,4,11,12) | Main input power supply | Four parallel pins reduce trace resistance and inductance - critical for handling 10A input ripple and minimizing hot-loop area. |
| PGND (5,10,19) | Power ground return path | Three dedicated pins + exposed pad form primary thermal and current return path - must be connected to large copper pour with multiple vias. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins reduce switching loop inductance - essential for Silent Switcher 2 EMI performance and 5MHz operation. |
| MODE/SYNC (13) | Frequency sync & mode control | Accepts external clock (0.5–2.25MHz) or outputs synchronized clock - enables deterministic multi-phase interleaving. |
| PGOOD (14) | Power-good open-drain flag | Active-low signal with 97–99% VOUT threshold and 100µs delay - provides clean enable signaling for downstream rails. |
| RT (15) | Oscillator frequency set | Resistor-to-AGND sets fSW from 0.5MHz to 5MHz - enables optimization of size (high f) vs. efficiency (low f). |
| SSTT (16) | Soft-start / tracking / temp monitor | 10µA current source for soft-start cap; transitions to 4mV/°C temp readout after startup - eliminates need for external thermal sensor. |
| ITH (17) | Loop compensation node | Connects Type II/III compensation network to AGND - sets bandwidth and phase margin for fast load transient recovery. |
| FB (18) | Feedback voltage input | Regulated to 500mV - defines output via RA/RB divider; supports remote sensing for tight DC accuracy. |
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 >20dB vs. SS1. |
| 100% Duty Cycle Operation | Enables dropout regulation down to VIN ≈ VOUT + IOUT×RDS(ON) - maintains regulation during brownout without external LDO. |
| Configurable Multiphase Support | MODE/SYNC pin enables precise phase alignment across multiple LTC3310HV#TRPBF units - reduces input/output ripple and improves thermal distribution. |
| Dual-Mode Control (Pulse-Skip / FCCM) | Selectable via MODE/SYNC pin voltage - pulse-skip maximizes light-load efficiency; FCCM ensures fixed-frequency stability for EMI filtering. |
| Digital Temperature Monitoring | SSTT pin provides calibrated 4mV/°C analog output - replaces discrete thermal sensors and simplifies system thermal management. |
Applications
| Automotive ADAS Power Supply | Industrial FPGA Core Rail |
|---|---|
Use Scenario: Powering vision processor SoCs (e.g., NVIDIA Jetson Orin) in camera modules exposed to under-hood temperatures up to 125°C ambient. IC Role / Device Role / Timing Role: Primary 1.2V/10A core regulator with remote sense, PGOOD sequencing, and thermal derating via SSTT monitoring. Use Value: AEC-Q100 Grade H qualification and 150°C junction rating ensure reliability without derating; Silent Switcher 2 meets CISPR 25 Class 5 radiated limits without shielding. | Use Scenario: Generating 0.85V @ 8A for Xilinx Kria KV260 adaptive compute SOM in factory automation controllers. IC Role / Device Role / Timing Role: High-efficiency POL converter with programmable 2MHz switching and multiphase capability for dynamic load step response. Use Value: 35ns min-on-time enables stable low-VOUT operation; 4.5mΩ NMOS switch delivers >92% efficiency at full load, reducing heatsink requirements. |
| Telecom Baseband Unit | Medical Imaging FPGA Subsystem |
Use Scenario: Providing 1.0V/10A to ASICs in 5G massive MIMO radio units with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Synchronized multi-phase buck regulator using MODE/SYNC to align switching edges and suppress beat frequencies. Use Value: External clock synchronization eliminates subharmonic interference in sensitive RF front-ends; 5MHz max fSW allows ultra-small 470nH inductors. | Use Scenario: Powering real-time image reconstruction engines in portable ultrasound devices requiring low-noise, low-EMI operation near analog front-ends. IC Role / Device Role / Timing Role: Low-ripple, low-EMI core supply with soft-start tracking for controlled power-up sequencing across multiple voltage domains. Use Value: SSTT-based tracking ensures monotonic ramp of auxiliary rails; ±1% remote-sense accuracy maintains ADC reference stability. |
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 |
|---|---|---|---|
| MP2964GQKT-Z | 4.2mΩ/12mΩ MOSFETs, 2.5V–16V VIN, no integrated hot-loop caps, requires external bootstrap diode | Broader input range but higher EMI; lacks Silent Switcher 2 EMI suppression and remote sense accuracy | Choose MP2964GQKT-Z only if input exceeds 5.5V or cost is primary constraint; not suitable for CISPR 25 Class 5 designs. |
| LTC3312HV#TRPBF | 2-phase controller (vs. single-phase), supports up to 20A with external FETs, same package and pinout, includes AVP | Higher current scalability and better transient response for >12A loads; adds complexity with external power stage | Choose LTC3312HV#TRPBF when >10A is needed or when design requires phase interleaving for lower ripple; shares layout compatibility. |
Compared with MP2964GQKT-Z, LTC3310HV#TRPBF delivers superior EMI performance and ±1% remote-sense accuracy but limits VIN to 5.5V; versus LTC3312HV#TRPBF, it offers simpler single-phase integration at lower cost and smaller footprint for ≤10A applications.
Availability
LTC3310HV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS, industrial FPGA, and telecom baseband applications requiring stable component supply, AEC-Q100 qualification, and high-temperature reliability.
Supply support for LTC3310HV#TRPBF 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.
The LTC3310HV#TRPBF belongs to the Silent Switcher 2 family of high-efficiency, low-EMI monolithic DC/DC converters designed for space-constrained, noise-sensitive applications in automotive, industrial, and communications infrastructure.
FAQ
What is the maximum operating junction temperature for LTC3310HV#TRPBF?
The LTC3310HV#TRPBF is rated for –40°C to +150°C junction temperature and is AEC-Q100 qualified for Grade H automotive use. Its thermal design relies on the exposed PGND pad soldered to a large PCB copper area; θJCbottom is 9°C/W. At 10A load and 3.3V input, typical die temperature rise is ~45°C above ambient with proper layout - well within safe operating limits.
Does LTC3310HV#TRPBF support fixed-output variants like LTC3310HV-1#TRPBF?
No, LTC3310HV#TRPBF is the adjustable-output version with 500mV FB reference; fixed 1.0V output is only available in the LTC3310HV-1#TRPBF variant. The "-1" suffix denotes internal resistor divider and Active Voltage Positioning (AVP), which LTC3310HV#TRPBF does not implement. Pinout and package are identical, but FB functionality differs.
Can LTC3310HV#TRPBF be synchronized to an external clock, and what is the supported frequency range?
Yes, LTC3310HV#TRPBF supports external clock synchronization via the MODE/SYNC pin. It accepts square-wave inputs from 0.5MHz to 2.25MHz and locks phase within ~20µs of detection. During sync, it operates in pulse-skip mode and automatically adjusts slope compensation. The default free-running frequency (RT = 274kΩ) is 2MHz, matching common telecom and FPGA timing requirements.
How does the SSTT pin function across startup, regulation, and fault conditions in LTC3310HV#TRPBF?
In LTC3310HV#TRPBF, the SSTT pin serves three roles: (1) During startup, a 10µA current charges an external capacitor to control soft-start ramp rate; (2) In regulation, it outputs a 4mV/°C analog voltage representing die temperature; (3) During output short-circuit, it's pulled to ~140mV above VFB to trigger automatic soft-start recovery. Shutdown and UVLO also reset the SSTT capacitor.
What are the key layout requirements for achieving optimal EMI performance with LTC3310HV#TRPBF?
To achieve CISPR 25 Class 5 compliance with LTC3310HV#TRPBF, place input capacitors (≥22µF ceramic) directly between each VIN pin and adjacent PGND pins; minimize SW loop area using short, wide traces to the inductor; connect the exposed PGND pad to a solid inner-layer ground plane with ≥6 thermal vias; avoid routing sensitive signals (FB, AGND) near SW or VIN; and use the integrated Silent Switcher 2 bypass caps - no external VIN–AGND ceramic required.
LTC3310HV#TRPBF 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#TRPBF FAQ
1.How can I place an order for LTC3310HV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3310HV#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3310HV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3310HV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3310HV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3310HV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3310HV#TRPBF?
LTC3310HV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3310HV#TRPBF 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#TRPBF?
For technical support, including LTC3310HV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3310HV#TRPBF requirements.
6.How does Aetrix verify that LTC3310HV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3310HV#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3310HV#TRPBF?
All LTC3310HV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3310HV#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3310HV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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