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Analog Devices Inc. LT7170RV#TRPBF
- Part No.:
- LT7170RV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-PowerTFQFN
- Datasheet:
-
LT7170RV#TRPBF.pdf
- Description:
- IC REG BUCK PROG 20A 24LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
LT7170RV#TRPBF from Analog Devices is a monolithic, dual-phase, synchronous step-down regulator delivering up to 20 A continuous output current with 16 V max input, 0.4–5.5 V programmable output voltage, ±0.25% accuracy (0.6–1.375 V range), and PMBus/I²C digital power system management. It targets high-density server VRMs, SSD power rails, and industrial compute modules requiring low-EMI, fast transient response, and telemetry-enabled monitoring.
For engineers reviewing the LT7170RV#TRPBF datasheet, LT7170RV#TRPBF pinout, LT7170RV#TRPBF application, or LT7170RV#TRPBF equivalent, key selection criteria include its 24-lead LQFN package, valley current-mode control with 25 ns min on-time, differential remote sensing, three-times programmable NVM, and support for 400 kHz–4 MHz switching frequency via resistor or PMBus configuration.
Technical Context
The LT7170RV#TRPBF implements controlled on-time valley current-mode control with 25 ns typical minimum on-time, enabling high-frequency operation at low output voltages while maintaining excellent transient response. Its dual-phase architecture (180° out-of-phase) reduces input/output ripple and improves thermal distribution across the die and PCB.
It integrates a PMBus 1.3-compliant I²C interface for full telemetry (VOUT, IOUT, VIN, die temperature, faults) and configuration (voltage, current limit, sequencing, soft start/stop, UV/OV thresholds, loop compensation). All key parameters-including fSW, phase, and VOUT-can be set via external resistors or stored in on-chip three-times programmable NVM with ECC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.5 V (with EXTVCC) to 16 V - supports ultra-low-input applications like battery-backed systems or intermediate bus converters. |
| VOUT Range & Accuracy | 0.4 V to 5.5 V; ±0.25% (0.6–1.375 V) - enables precise core voltage regulation for modern FPGAs and ASICs. |
| Output Current | 20 A continuous (dual-phase LT7170-1 configuration) - delivers high current in compact footprint without external drivers or controllers. |
| fSW Range | 400 kHz to 4 MHz - allows optimization of size (high fSW) vs. efficiency (low fSW) and EMI compliance. |
| Min On-Time | 25 ns typical - supports >10:1 step-down ratios (e.g., 12 V → 0.8 V at 2 MHz) without pulse-skipping instability. |
| Telemetry Interface | PMBus 1.3 over I²C (up to 1 MHz) - enables real-time system-level health monitoring and dynamic margining in data center infrastructure. |
| NVM | Three-times programmable nonvolatile memory with ECC - stores complete configuration for reliable cold-start operation without host intervention. |
Pinout & Package
LT7170RV#TRPBF is housed in a 24-lead, 3.5 mm × 4 mm LQFN package with exposed thermal pad (EP), optimized for high-current DC/DC conversion and thermal dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 18) | Main input power supply inputs | Dual VIN pins reduce IR drop and improve high-current routing; each requires local 0.1 µF ceramic bypass to PGND. |
| PGND (Pins 2, 17, 27–29) | Power ground return path | Multiple low-inductance PGND pins minimize ground bounce and enable robust high-frequency switching performance. |
| SW0 (Pins 20, 21, 26) / SW1 (Pins 22, 23, 25) | Phase 0 and Phase 1 switch node outputs | Each phase has three paralleled SW pins for low-loss connection to respective inductors; critical for minimizing parasitic inductance. |
| VSENSEP / VSENSEN (Pins 15, 16) | Differential output voltage sense inputs | Enables accurate remote sensing at load point, rejecting PCB IR drop and ensuring tight regulation under dynamic load conditions. |
| SYNC/PWM_CFG (Pin 4) | External clock sync input / PWM config resistor terminal | Supports synchronization to system clock or resistor-based fSW/phase/compensation setup; internal PLL locks to rising edge. |
| PGOOD / ALERT (Pins 9, 7) | Open-drain status outputs | PGOOD indicates regulated output within UV/OV fault thresholds; ALERT signals configurable faults/warnings (e.g., overtemp, OCP). |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30 dB vs. conventional buck regulators - eliminates need for metal shielding in CISPR 32 Class B systems. |
| Dual-phase valley current-mode control | 180° interleaved phases cut input/output ripple current by ~70%, easing capacitor selection and improving thermal balance. |
| Programmable current limit (4 settings per phase) | Configurable ILIM_POS from 3.6 A to 12.5 A per phase (LT7170-1) - enables precise overcurrent protection matching load requirements. |
| Differential remote VOUT sense with discharge control | Active VOUT pull-down via VSENSEP during disable ensures safe discharge to <0.2 V before restart - prevents backfeed in multi-rail systems. |
| Reduced-power telemetry mode | Slows ADC sampling to extend quiescent current reduction - cuts VIN quiescent current from 33 mA to 4 mA in shutdown. |
Applications
| AI Accelerator Power Rail | Enterprise SSD Core Supply |
|---|---|
|
Use Scenario: Providing tightly regulated 0.8 V @ 15 A to GPU/FPGA-based AI inference accelerators with rapid load transients up to 10 A/µs. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller managing two parallel inductors and delivering digitally monitored, sequenced power with <25 µs UV/OV fault response. Use Value: 25 ns min on-time and valley current-mode control ensure stable regulation during 0.8 V step loads without droop or overshoot, verified in Figure 31. |
Use Scenario: Generating 1.2 V @ 12 A for NVMe SSD controller and NAND flash arrays in rack-scale storage systems. IC Role / Device Role / Timing Role: Digitally managed VRM with PMBus telemetry feeding real-time IOUT/VOUT data to BMC for predictive thermal throttling and power capping. Use Value: READ_IOUT DC accuracy of ±300 mA (≤10 A) and ±3% (>10 A) enables accurate power budgeting and firmware-driven dynamic voltage scaling. |
| Industrial Edge Compute Module | 5G Baseband Radio PSU |
|
Use Scenario: Powering ARM-based edge AI modules operating in extended temperature (−40°C to +105°C) with strict EMI limits in factory automation cabinets. IC Role / Device Role / Timing Role: Silent Switcher® regulator with programmable slew rate and CISPR 32-compliant radiated emissions (Figure 33) deployed as primary 3.3 V/5 V POL converter. Use Value: Integrated three-times programmable NVM stores calibrated compensation and fault thresholds - eliminates host reconfiguration during field updates. |
Use Scenario: Delivering 1.0 V @ 18 A to massive MIMO RF transceivers with stringent transient response and thermal derating requirements. IC Role / Device Role / Timing Role: Dual-phase buck managing thermal load across two phases while reporting die temperature telemetry for closed-loop fan control. Use Value: θJC-BOTTOM = 4.0 °C/W (Table 4) enables direct thermal coupling to heatsink; READ_TEMPERATURE_1 error <±2°C (Figure 24) ensures accurate thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current digital buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3887EUH#PBF | Single-phase, 80 A capable (multiphase controller), no integrated MOSFETs; requires external power stages. | Better suited for >40 A applications with custom layout flexibility; lacks Silent Switcher EMI advantage. | Select when scalable multiphase design with discrete FETs is preferred over monolithic integration. |
| TPS546D24RSAR | Single-chip 60 A solution (dual-phase), PMBus 1.2, no NVM, 12-bit VOUT DAC resolution vs. LT7170's 16-bit effective resolution. | Higher current density but lower telemetry accuracy (±0.5% VOUT vs. ±0.25%) and no programmable discharge threshold. | Select for cost-sensitive, high-volume telecom PSUs where NVM and sub-0.3% accuracy are non-critical. |
Compared with LTC3887EUH#PBF and TPS546D24RSAR, the LT7170RV#TRPBF offers monolithic integration with superior EMI performance, tighter VOUT accuracy, and on-chip NVM for autonomous startup - making it optimal for space-constrained, telemetry-dependent, and EMI-sensitive applications where board area and regulatory compliance are prioritized.
Availability
LT7170RV#TRPBF is available at Aetrix Electronics and suitable for AI accelerator power rails, enterprise SSD core supplies, and industrial edge compute modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT7170RV#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, Inc. 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 LT7170RV#TRPBF belongs to Analog Devices' Silent Switcher® digital power management product line, engineered for high-efficiency, low-EMI, and fully configurable DC/DC conversion in data center, storage, and industrial computing systems.
FAQ
What is the maximum continuous output current supported by the LT7170RV#TRPBF?
The LT7170RV#TRPBF supports up to 20 A of continuous output current in its dual-phase LT7170-1 configuration, with each phase delivering up to 12.5 A (Current-Limit Selection 3). This rating assumes proper thermal management using the exposed pad and recommended PCB layout per Table 4 (θJC-BOTTOM = 4.0 °C/W). The LT7170RV#TRPBF achieves this with integrated MOSFETs and no external driver required.
Does the LT7170RV#TRPBF support differential remote voltage sensing?
Yes, the LT7170RV#TRPBF supports fully differential remote output voltage sensing via dedicated VSENSEP (Pin 15) and VSENSEN (Pin 16) inputs. This feature rejects PCB trace resistance errors and ensures accurate regulation at the load point, especially critical for high-current, low-voltage rails like 0.8 V CPU cores. The LT7170RV#TRPBF also actively discharges VOUT through VSENSEP during shutdown to guarantee safe restart sequencing.
How is switching frequency configured on the LT7170RV#TRPBF?
Switching frequency on the LT7170RV#TRPBF is configurable from 400 kHz to 4 MHz using either an external resistor on the SYNC/PWM_CFG pin (Pin 4) or via the PMBus FREQUENCY_SWITCH command. Resistor selection determines fSW, phase offset, and internal loop compensation simultaneously (per Table 8 in the datasheet). The internal PLL synchronizes to external clocks applied to SYNC/PWM_CFG, enabling deterministic timing in synchronized multi-regulator systems.
What telemetry parameters can be read back from the LT7170RV#TRPBF via PMBus?
The LT7170RV#TRPBF provides real-time telemetry readback of VOUT, IOUT, VIN, die temperature, and fault status via its PMBus 1.3-compliant I²C interface. READ_VOUT accuracy is ±0.20% (0.6–1.375 V), READ_IOUT DC accuracy is ±300 mA (≤10 A), and READ_TEMPERATURE_1 error is <±2°C (Figure 24). Telemetry measurement periods range from 2.5 ms (IOUT-only scope mode) to 110 ms (low-frequency mode), allowing trade-offs between responsiveness and quiescent current.
Is the LT7170RV#TRPBF pin-compatible with other devices in the LT7170 family?
The LT7170RV#TRPBF shares the same 24-lead LQFN package and pinout as all LT7170/LT7170-1 variants, including LT7170IUH#PBF and LT7170-1IUH#PBF. Pin functions (e.g., SW0/SW1 assignment, VSENSEP/VSENSEN location, SYNC/PWM_CFG behavior) are identical across the family. Differences lie in internal configuration (e.g., single- vs. dual-phase default) and ordering options - not physical or electrical pin compatibility.
LT7170RV#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#TRPBF FAQ
1.How can I place an order for LT7170RV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7170RV#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#TRPBF reliable?
The price and inventory of LT7170RV#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LT7170RV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7170RV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7170RV#TRPBF?
LT7170RV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7170RV#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#TRPBF?
For technical support, including LT7170RV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7170RV#TRPBF requirements.
6.How does Aetrix verify that LT7170RV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT7170RV#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LT7170RV#TRPBF?
All LT7170RV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7170RV#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#TRPBF part is unused and in its original packaging.
Return procedure for LT7170RV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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