My Inquiry
My Account
Analog Devices Inc. LT7171RV-1#TRMPBF
- Part No.:
- LT7171RV-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 30-PowerTFQFN
- Datasheet:
-
LT7171RV-1#TRMPBF.pdf
- Description:
- IC REG BUCK PROG 20A 30LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT7171RV-1#TRMPBF from Analog Devices is a monolithic dual-phase synchronous step-down regulator delivering up to 20A continuous output current with forced-continuous operation, 0.4V–5.5V programmable VOUT, ±0.25% accuracy (0.6V ≤ VOUT ≤ 1.375V), and PMBus/I²C telemetry for VOUT, IOUT, VIN, die temperature, and faults. It targets high-density power rails in data center servers and solid-state drives.
For engineers reviewing the LT7171RV-1#TRMPBF datasheet, LT7171RV-1#TRMPBF pinout, LT7171RV-1#TRMPBF application, or LT7171RV-1#TRMPBF equivalent, key selection criteria include dual-phase PolyPhase load sharing support, 25ns minimum on-time for high-frequency low-VOUT operation, resistor- or PMBus-configurable switching frequency (400kHz–4MHz), integrated three-times-programmable NVM, and differential remote sensing capability.
Technical Context
The LT7171RV-1#TRMPBF implements controlled-on-time valley current-mode control with 25ns typical minimum on-time, enabling stable 1.0V/20A output at 1MHz+ switching frequencies while maintaining fast transient response. Its dual-phase architecture uses interleaved switching with programmable phase offset (0°–345° in 15° steps) to reduce input/output ripple and improve thermal distribution.
Telemetry is acquired via on-chip ADCs with dedicated readback commands (READ_VOUT, READ_IOUT, READ_VIN); DC accuracy for READ_IOUT is ±300mA (0–10A) or ±3% (>10A) under specified VOUT/VIN and fSW conditions. The device supports PMBus 1.3-compliant command set including STORE_USER_ALL, MFR_RESET, and event-based sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Range | 0.4V to 5.5V; supports core logic, memory, and ASIC rails across multiple voltage domains |
| VOUT Accuracy | ±0.25% (0.6V–1.375V); ensures tight regulation for sensitive digital loads without external calibration |
| Max Output Current | 20A continuous; achieved via dual-phase topology with per-phase current limit up to 12.5A (Selection 3) |
| Switching Frequency | 400kHz to 4MHz; enables compact magnetics and high efficiency at low duty cycles |
| Min On-Time | 25ns typical; allows 1.0V output at 3MHz without pulse-skipping or instability |
| PMBus Interface | I²C-compatible, 10–1000kHz; provides full telemetry, fault logging, and configuration without additional MCU overhead |
| NVM Endurance | 3 write cycles; stores user configuration (VOUT, fSW, sequencing) for reliable cold-start behavior |
Pinout & Package
LT7171RV-1#TRMPBF is housed in a 30-lead, 3.5mm × 4mm LQFN package with exposed thermal pad (EP). Pin layout supports symmetric PCB routing for dual-phase inductor placement and low-inductance PGND return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 24) | Main input power supply | Dual-input configuration reduces high-current loop area; requires local 0.1µF + bulk ≥10µF decoupling per pin |
| PGND (Pins 2, 23, 31, 32, 33, 34, 35) | Power ground reference | Seven dedicated pins minimize IR drop and thermal resistance; must connect directly to internal copper pour |
| SW0/SW1 (Pins 28–29, 25–26) | Phase node outputs | Separated high-side/low-side switch nodes per phase; enable independent inductor placement and EMI filtering |
| VSENSEP/VSENSEN (Pins 21–22) | Differential output voltage sense | Rejects PCB trace IR drop; enables accurate regulation at point-of-load under high-current conditions |
| PWM_CFG/VOUT_CFG/ASEL (Pins 4–6) | Resistor-programmable configuration | Set fSW, VOUT, and I²C address at boot without firmware; floating = NVM default |
| ITH (Pin 7) | Error amplifier compensation node | External RC network sets loop bandwidth; short to INTVCC enables internal compensation |
| SHARE_CLK (Pin 19) | PolyPhase synchronization clock | Enables deterministic phase alignment across up to four devices for scalable current capacity |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces peak EMI emissions by >30dB vs. conventional buck regulators, eliminating need for metal shielding in space-constrained systems |
| Dual-phase valley current-mode control | Enables precise per-phase current balancing and fast load-step response (<5µs recovery for 50% load step) |
| Three-times-programmable NVM | Stores final VOUT, fSW, soft-start, and sequencing settings; survives power cycles without host intervention |
| Differential remote sensing | Compensates for up to 50mV IR drop between regulator and load, ensuring ±0.25% regulation at point-of-load |
| Programmable current limit (4 selections) | Per-phase ILIM_POS from 3.6A to 12.5A; prevents inductor saturation and MOSFET overstress during startup or overload |
Applications
| Server CPU Core Rail | Data Center SSD Power |
|---|---|
Use Scenario: Regulating 1.0V/20A for high-performance x86 CPU cores in 1U rack servers with strict EMI limits. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller managing two parallel 10A inductor legs with interleaved timing to suppress input ripple. Use Value: 25ns min on-time enables 1.0V output at 2MHz, reducing inductor size by 40% versus 500kHz solutions while maintaining <1% output deviation under 10A/µs load transients. | Use Scenario: Providing tightly regulated 3.3V/15A power to NVMe SSD controller and NAND flash arrays in enterprise storage enclosures. IC Role / Device Role / Timing Role: Digitally managed POL regulator with PMBus telemetry feeding real-time IOUT and die temperature to BMC for thermal throttling decisions. Use Value: ±300mA READ_IOUT DC accuracy (0–10A) enables precise power budgeting; differential sensing maintains regulation despite 30mV PCB voltage drop across backplane connectors. |
| Industrial FPGA Board | AI Accelerator Module |
Use Scenario: Delivering 0.85V/18A to Xilinx Kintex Ultrascale+ FPGA fabric with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: Programmable step-down regulator using NVM-stored VOUT and sequencing profiles to coordinate power-up with I/O bank and transceiver rails. Use Value: Resistor-configurable VOUT_CFG and PWM_CFG allow hardware-defined startup behavior without FPGA bitstream dependencies; 4ms initialization time supports deterministic boot timing. | Use Scenario: Supplying 0.75V/20A to NVIDIA A100 GPU memory subsystem with simultaneous multi-rail sequencing and fault isolation. IC Role / Device Role / Timing Role: Dual-phase controller operating in PolyPhase mode with SHARE_CLK synchronization to adjacent LT7171RV-1#TRMPBF units for 40A total capacity. Use Value: 0.4V–5.5V VOUT range covers LPDDR5 (0.6V), GDDR6X (1.35V), and auxiliary 3.3V rails; ALERT pin asserts within 25µs of VOUT UV/OV fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3887EUH#PBF | Single-phase, 60A capable; no integrated MOSFETs; requires external power stages | Better suited for ultra-high-current (>30A) discrete designs where thermal management permits larger footprints | Select when board space allows discrete FETs and higher peak current headroom is required over integrated solution density |
| TPS546D24RQFT | 40A single-chip dual-phase; no PMBus telemetry; only analog monitoring pins (VOUT_MON, IOUT_MON) | Targeted at cost-sensitive industrial PLCs where digital bus communication is not mandatory | Choose when system lacks PMBus infrastructure but requires comparable 20A+ dual-phase integration and Silent Switcher-level EMI performance |
Compared with LTC3887EUH#PBF and TPS546D24RQFT, the LT7171RV-1#TRMPBF delivers superior integration density (monolithic dual-phase), full PMBus telemetry visibility, and guaranteed 25ns min on-time for sub-1V high-frequency operation - making it optimal for space- and EMI-constrained AI/SSD/server applications requiring deterministic digital power management.
Availability
LT7171RV-1#TRMPBF is available at Aetrix Electronics and suitable for data center server power, enterprise SSD power delivery, and AI accelerator module design requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LT7171RV-1#TRMPBF 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, headquartered in Wilmington, MA.
The LT7171RV-1#TRMPBF belongs to the Silent Switcher® DC/DC regulator product line, engineered specifically for high-efficiency, low-EMI power conversion in compute-intensive systems where thermal density and electromagnetic compliance are critical constraints.
FAQ
What is the maximum supported switching frequency for LT7171RV-1#TRMPBF?
The LT7171RV-1#TRMPBF supports a programmable switching frequency range from 400kHz to 4MHz. This range is confirmed in the Electrical Characteristics table (fSW Programming Range: 0.4–4MHz) and enabled via resistor selection on the PWM_CFG pin or PMBus command. Operation at 4MHz allows minimal inductor and capacitor sizes while maintaining stability due to the 25ns typical minimum on-time specification.
Does LT7171RV-1#TRMPBF support differential remote voltage sensing?
Yes, the LT7171RV-1#TRMPBF supports differential remote voltage sensing via dedicated VSENSEP and VSENSEN pins. This feature compensates for IR drop across PCB traces and connectors, ensuring ±0.25% output voltage accuracy at the load. The datasheet specifies VSENSEP input current as 300µA at 3.0V and confirms differential sensing in both the General Description and Applications Information sections.
How many times can the on-chip NVM of LT7171RV-1#TRMPBF be programmed?
The LT7171RV-1#TRMPBF integrates three-times-programmable nonvolatile memory (NVM), as explicitly stated in the Features and Electrical Characteristics sections. Each STORE_USER_ALL command consumes one programming cycle, and endurance is guaranteed for exactly three writes. Retention is rated for 10 years when programmed within specified junction temperature (−40°C to +125°C) and VIN (9.6V–16V) conditions.
What is the output current capability of LT7171RV-1#TRMPBF in dual-phase mode?
In dual-phase mode, the LT7171RV-1#TRMPBF delivers up to 20A continuous output current. This is achieved by interleaving two phases, each supporting up to 12.5A peak valley current (Current-Limit Selection 3). The General Description states "up to 20A of continuous output current" and clarifies that the LT7171-1 option uses two switching phases driving a single regulated output supply.
Which communication protocol does LT7171RV-1#TRMPBF use for digital power system management?
The LT7171RV-1#TRMPBF uses the PMBus/I²C serial interface compliant with PMBus 1.3 specification. It supports standard PMBus commands including READ_VOUT, READ_IOUT, VOUT_COMMAND, and STORE_USER_ALL, as documented in the PMBus/I²C Serial Interface Summary section. The interface operates from 10kHz to 1000kHz and provides full telemetry, configuration, and fault reporting capabilities.
LT7171RV-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®
- Package/Case:
- 30-PowerTFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V, 2.9V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 20A
- Frequency - Switching:
- 400kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-LQFN (3.5x4)
LT7171RV-1#TRMPBF FAQ
1.How can I place an order for LT7171RV-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7171RV-1#TRMPBF 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 LT7171RV-1#TRMPBF reliable?
The price and inventory of LT7171RV-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT7171RV-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT7171RV-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7171RV-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7171RV-1#TRMPBF?
LT7171RV-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7171RV-1#TRMPBF 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 LT7171RV-1#TRMPBF?
For technical support, including LT7171RV-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7171RV-1#TRMPBF requirements.
6.How does Aetrix verify that LT7171RV-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT7171RV-1#TRMPBF 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 LT7171RV-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT7171RV-1#TRMPBF?
All LT7171RV-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7171RV-1#TRMPBF, 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 LT7171RV-1#TRMPBF part is unused and in its original packaging.
Return procedure for LT7171RV-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT7171RV-1#TRMPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
