My Inquiry
My Account
Analog Devices Inc. LT7170RV-1#TRPBF
- Part No.:
- LT7170RV-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-PowerTFQFN
- Datasheet:
-
LT7170RV-1#TRPBF.pdf
- Description:
- IC REG BUCK PROG 20A 24LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,866
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT7170RV-1#TRPBF from Analog Devices is a 20 A, 16 V, dual-phase synchronous step-down regulator with digital power system management via PMBus/I²C. It delivers up to 20 A continuous output current with 0.4 V–5.5 V programmable VOUT, ±0.25% accuracy (0.6–1.375 V range), and Silent Switcher® architecture for low EMI in compact layouts. It targets high-density point-of-load applications in data center servers and solid-state drives.
For engineers reviewing the LT7170RV-1#TRPBF datasheet, LT7170RV-1#TRPBF pinout, LT7170RV-1#TRPBF application, or LT7170RV-1#TRPBF equivalent, key selection criteria include its dual-phase valley current-mode control, 24-lead LQFN package, 400 kHz–4 MHz programmable switching frequency, differential remote sensing, and three-time programmable NVM for configuration storage.
Technical Context
The LT7170RV-1#TRPBF implements controlled on-time valley current-mode control with 25 ns typical minimum on-time, enabling high fSW at low VOUT while maintaining fast transient response. Its dual-phase operation uses 180° interleaving across SW0 and SW1 outputs to reduce input/output ripple and improve thermal distribution.
It integrates a PMBus 1.3-compliant I²C interface supporting telemetry readback of VOUT, IOUT, VIN, die temperature, and fault status, plus full programmability of voltage, current limit, soft start/stop, sequencing, loop compensation, and phase alignment - all configurable via resistors, PMBus commands, or stored in on-chip NVM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Range | 0.4 V to 5.5 V; supports core logic, FPGA, ASIC, and memory rails with precise low-voltage regulation. |
| VOUT Accuracy | ±0.25% (0.6–1.375 V); ensures tight tolerance for sensitive digital loads without external calibration. |
| Max Output Current | 20 A continuous (dual-phase); enables single-regulator solution for high-current POL without parallel ICs. |
| fSW Range | 400 kHz to 4 MHz; allows optimization of size (high fSW) vs. efficiency (low fSW) per design constraints. |
| Min On-Time | 25 ns typical; supports >1 MHz operation even at 0.6 V output, critical for high-step-down ratios. |
| Package | 24-lead (3.5 mm × 4 mm) LQFN; thermally enhanced footprint with dedicated PGND and SGND pins for noise isolation. |
| Interface | PMBus/I²C (up to 1 MHz); enables real-time telemetry, dynamic reconfiguration, and fault logging in managed systems. |
| NVM | Three-time programmable with ECC; stores complete configuration (VOUT, fSW, limits, compensation) for standalone boot. |
Pinout & Package
LT7170RV-1#TRPBF is housed in a 24-lead, 3.5 mm × 4 mm LQFN package with exposed thermal pad (EP). Pin layout supports dual-phase operation: SW0 (Pins 22, 23, 25) and SW1 (Pins 20, 21, 26) are independently routed for interleaved inductor connections; VIN (Pins 1, 18), PGND (Pins 2, 17, 27–29), and dedicated sense pins (VSENSEP/Pin 15, VSENSEN/Pin 16) enable robust high-current layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1, 18) | Primary power input | Dual-input routing reduces high-current path impedance; requires local 0.1 µF + bulk ≥10 µF bypassing per pin. |
| PGND (2, 17, 27–29) | Power ground return | Multiple low-inductance paths minimize ground bounce and improve EMI performance under 20 A load steps. |
| SW0 (22, 23, 25) | Phase 0 switch node | Interleaved with SW1; connects to Phase 0 inductor and BOOST0 capacitor for dual-phase current sharing. |
| SW1 (20, 21, 26) | Phase 1 switch node | 180° out-of-phase with SW0; enables ripple cancellation and reduced input/output capacitor requirements. |
| VSENSEP (15) / VSENSEN (16) | Differential output voltage sense | Enables Kelvin sensing to reject PCB IR drop; critical for <±1% regulation accuracy at high load currents. |
| SYNC/PWM_CFG (4) | Configurable clock I/O | Accepts external SYNC (0.4–4 MHz) or outputs PWM clock; resistor-programmable fSW/phase/NVM settings. |
| PGOOD (9) | Open-drain power-good indicator | Asserts after soft-start completion and VOUT stabilization within UV/OV thresholds; deglitched for noise immunity. |
| ALERT (7) | Open-drain fault/warning flag | Signals overtemperature, overcurrent, UV/OV, communication, or CML faults; supports system-level fault prioritization. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Integrated magnetic field cancellation reduces radiated EMI by >30 dB vs. conventional buck regulators - meets CISPR 32 Class B without shielding. |
| Dual-phase valley current-mode control | 180° interleaving cuts input/output ripple current by ~70%, allowing smaller input capacitors and lower output voltage deviation during transients. |
| Programmable current limit (per phase) | Four selectable ranges (3.6–12.5 A per phase); enables precise overcurrent protection matched to inductor saturation and MOSFET SOA. |
| Differential remote VOUT sense | Rejects up to 50 mV of PCB trace IR drop; maintains ±0.25% regulation accuracy at 20 A load despite 100+ mΩ board resistance. |
| Three-time programmable NVM with ECC | Stores full configuration (VOUT, fSW, compensation, sequencing) for zero-configuration startup - eliminates external EEPROM and boot firmware dependencies. |
| Reduced-power telemetry mode | Slows ADC sampling to extend quiescent current reduction (33 mA → 4 mA in shutdown); extends battery life in always-on monitoring applications. |
Applications
| Server CPU Core Rail | AI Accelerator Module |
|---|---|
|
Use Scenario: Powers 3.2 GHz multi-core Xeon CPU requiring 1.0 V @ 18 A with <10 mV droop under 10 A/µs load transients. IC Role / Device Role / Timing Role: Dual-phase POL regulator providing tightly regulated core voltage with real-time telemetry for dynamic voltage/frequency scaling (DVFS). Use Value: 25 ns min on-time and valley current control deliver sub-500 ns response to load steps, minimizing required bulk capacitance by 40% vs. single-phase solutions. |
Use Scenario: Supplies 0.8 V @ 20 A to NVIDIA A100 GPU memory subsystem with strict ±1% regulation and thermal derating above 105°C. IC Role / Device Role / Timing Role: Digitally managed step-down regulator with die temperature telemetry and programmable overtemperature shutdown threshold. Use Value: Integrated temperature sensor and PMBus readback enable closed-loop thermal throttling without external sensors or microcontroller intervention. |
| Enterprise SSD Power | 5G Baseband Radio Card |
|
Use Scenario: Generates 1.2 V @ 15 A for NVMe controller and NAND flash in high-density U.2 SSDs with space-constrained 12 mm × 12 mm PCB area. IC Role / Device Role / Timing Role: Compact dual-phase regulator using Silent Switcher® layout to meet stringent radiated EMI limits in stacked drive modules. Use Value: 3.5 mm × 4 mm LQFN package with integrated drivers and NVM eliminates need for external gate drivers or configuration EEPROM - saves >25 mm² board area. |
Use Scenario: Delivers 1.8 V @ 12 A to RF transceiver ASIC in outdoor macro cell radio unit operating from −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Robust POL regulator with extended temperature rating (−40°C to +150°C TJ), EXTVCC support for 1.5 V VIN operation, and undervoltage lockout. Use Value: Wide VIN range (1.5–16 V with EXTVCC) enables direct battery backup (12 V lead-acid) and seamless switchover during AC power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current digital POL regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7151S | Single-phase, 25 A max; no dual-phase interleaving; identical Silent Switcher® architecture and PMBus interface. | Better suited for space-constrained single-inductor designs where ripple cancellation is less critical than peak current capability. | Select LTC7151S when board area is tighter than ripple spec, and 25 A single-phase suffices - avoids dual inductor layout complexity. |
| TPS546D24A | 20 A, 16 V, dual-phase; TI's D-CAP4 control; no NVM; only resistor/PMBus configuration; different pinout and thermal pad design. | Optimized for fast transient response in telecom infrastructure; lacks Silent Switcher® EMI performance and integrated EXTVCC support. | Choose TPS546D24A for cost-sensitive telecom designs needing rapid load-step response but not CISPR 32 compliance or standalone NVM boot. |
Compared with LT7170RV-1#TRPBF, LTC7151S offers higher single-phase current but forfeits ripple reduction and phase flexibility, while TPS546D24A provides competitive performance without Silent Switcher® EMI suppression or three-time NVM - making LT7170RV-1#TRPBF optimal for EMI-sensitive, self-contained, high-reliability systems.
Availability
LT7170RV-1#TRPBF is available at Aetrix Electronics and suitable for data center server power, AI accelerator modules, and enterprise SSDs requiring stable component supply, long-term lifecycle assurance, and full digital power management capability.
Supply support for LT7170RV-1#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 power management markets since 1965.
The LT7170/LT7170-1 product line was designed specifically for digitally managed, high-current point-of-load regulation in space- and EMI-constrained computing and storage systems - emphasizing integration, telemetry fidelity, and autonomous operation.
FAQ
What is the maximum continuous output current supported by the LT7170RV-1#TRPBF?
The LT7170RV-1#TRPBF delivers up to 20 A of continuous output current using its dual-phase architecture, with each phase rated for up to 12.5 A (depending on current-limit selection). This is achieved through interleaved operation of SW0 and SW1 switch nodes, reducing thermal stress and output ripple compared to single-phase equivalents.
Does the LT7170RV-1#TRPBF require an external EEPROM for configuration storage?
No, the LT7170RV-1#TRPBF includes on-chip, three-times programmable nonvolatile memory (NVM) with error-correcting code (ECC). This allows full configuration - including VOUT, fSW, current limit, soft start, and loop compensation - to be stored and loaded autonomously at startup, eliminating the need for external EEPROM or host processor initialization.
How does the Silent Switcher® architecture in the LT7170RV-1#TRPBF reduce EMI?
The LT7170RV-1#TRPBF implements Silent Switcher® architecture via integrated, symmetrical hot-loop layout and internal magnetic field cancellation. This reduces high-frequency radiated emissions by >30 dB versus conventional buck regulators, enabling compliance with CISPR 32 Class B limits without ferrite beads, shields, or complex PCB filtering - verified in Figures 32 and 33 of the datasheet.
Can the LT7170RV-1#TRPBF operate with input voltages below 3 V?
Yes, the LT7170RV-1#TRPBF supports VIN as low as 1.5 V when the EXTVCC pin is biased between 3 V and 5.5 V. This enables operation from partially discharged batteries or low-voltage intermediate bus architectures, while maintaining full functionality including telemetry, PMBus communication, and regulated output down to 0.4 V.
What is the purpose of the VSENSEP and VSENSEN pins on the LT7170RV-1#TRPBF?
The VSENSEP and VSENSEN pins provide differential remote sensing of the output voltage at the load, rejecting voltage drop across PCB traces and connectors. This ensures ±0.25% regulation accuracy at the point of load - critical for high-current applications like CPU cores or AI accelerators where even 10 mV error can impact timing margins or thermal behavior.
Is the LT7170RV-1#TRPBF pin-compatible with the LT7170 (non-dual-phase variant)?
No, the LT7170RV-1#TRPBF is not pin-compatible with the LT7170. While both share the same 24-lead LQFN package and many pin functions, the LT7170RV-1#TRPBF assigns SW0 and SW1 to separate, independent switch nodes for dual-phase operation, whereas the LT7170 ties SW0 and SW1 together for single-phase use. Layout and inductor connections differ fundamentally.
LT7170RV-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-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):
- 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:
- 24-LQFN (3.5x4)
LT7170RV-1#TRPBF FAQ
1.How can I place an order for LT7170RV-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7170RV-1#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 LT7170RV-1#TRPBF reliable?
The price and inventory of LT7170RV-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT7170RV-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT7170RV-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7170RV-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7170RV-1#TRPBF?
LT7170RV-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7170RV-1#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 LT7170RV-1#TRPBF?
For technical support, including LT7170RV-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7170RV-1#TRPBF requirements.
6.How does Aetrix verify that LT7170RV-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT7170RV-1#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 LT7170RV-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT7170RV-1#TRPBF?
All LT7170RV-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7170RV-1#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 LT7170RV-1#TRPBF part is unused and in its original packaging.
Return procedure for LT7170RV-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT7170RV-1#TRPBF 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…
