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Texas Instruments LP875701ARNFRQ1
- Part No.:
- LP875701ARNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP875701ARNFRQ1.pdf
- Description:
- IC REG BUCK 1V 10A QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
LP875701ARNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive four-phase synchronous buck converter delivering 1.0 V at up to 10 A total output current (2.5 A per phase), with 3 MHz switching frequency, integrated high- and low-side FETs, and I²C programmability for infotainment and ADAS power rails.
For engineers reviewing the LP875701ARNFRQ1 datasheet, LP875701ARNFRQ1 pinout, LP875701ARNFRQ1 application, or LP875701ARNFRQ1 equivalent, this page delivers verified electrical specs, validated multiphase timing behavior, confirmed thermal protection thresholds, and real-world GPIO configuration options - all specific to the LP875701ARNFRQ1 VQFN-HR (26-pin) package.
Technical Context
The LP875701ARNFRQ1 implements forced-PWM, 4-phase interleaved operation with 90° phase offset between channels, enabling 12-MHz effective ripple frequency and reduced input/output capacitor requirements. It uses current-mode control with PI compensation and supports external clock synchronization (1–24 MHz) to minimize EMI in sensitive automotive domains.
It integrates differential remote voltage sensing across all four phases to compensate for IR drop to point-of-load, and provides on-die load-current measurement (±10% accuracy, 20-mA LSB) without external sense resistors. Protection includes per-phase forward/peak-current limiting (3.3–4.2 A), overtemperature warning (115–135°C), shutdown (140–160°C), and VANA OVP/UVLO (5.6–6.1 V / 2.51–2.75 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±15 mV DC accuracy (0.985–1.015 V) under full load and temperature range |
| Max Output Current | 10 A total (2.5 A per phase), limited by per-phase ILIM FWD and junction temperature |
| Switching Frequency | 3 MHz ±10% (2.7–3.3 MHz), configurable via internal oscillator or external clock (1–24 MHz) |
| Input Voltage Range | 2.8 V to 5.5 V on VIN_Bx and VANA pins; UVLO activates below 2.51 V, OVP trips above 5.6 V |
| Thermal Protection | Die temperature warning at 115–135°C (configurable), shutdown at 140–160°C with 20°C hysteresis |
| I²C Interface Speed | Supports Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes |
| Load Transient Response | ±12 mV deviation for 1.5–7.5 A load step (tr/tf = 1 µs) at 5 V input; ±15 mV at 3.3 V input |
Pinout & Package
The LP875701ARNFRQ1 is housed in a 4.50 mm × 4.00 mm VQFN-HR (26-pin) package with exposed thermal pad. Pin functions are validated per TI SNVSA05A datasheet Rev. A (August 2021).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch nodes | Four independent high-frequency switching outputs; each drives one phase of the 4-phase converter |
| VIN_B0–VIN_B3 | Phase input supplies | Separate input pins per phase; must be externally tied together and locally bypassed |
| FB_B0–FB_B3 | Per-phase feedback inputs | Positive feedback for BUCK0–BUCK3; FB_B1/FB_B3 also serve as negative feedback for adjacent phases |
| EN1/EN2/EN3 | Programmable enable/GPIO | Three multifunction pins supporting regulator enable, dual-voltage selection, or GPIO (push-pull/open-drain) |
| PGOOD | Power-good indicator | Open-drain output asserting when output voltage is within ±14 mV of target (configurable threshold) |
| nINT | Interrupt signal | Active-low open-drain interrupt for fault reporting (OVP, UVLO, thermal, current limit) with maskable sources |
| SCL/SDA | I²C interface | Standard-compliant bidirectional bus supporting up to 3.4 MHz; requires external pullups to VIO |
| CLKIN | External clock input | Accepts 1–24 MHz reference clock to synchronize switching and reduce EMI; grounded if unused |
Key Features
| Feature | Design Value |
|---|---|
| 4-phase interleaved architecture | Reduces input/output ripple amplitude by ~75% vs single-phase; enables smaller passive components and lower thermal stress per FET |
| Differential remote voltage sensing | Compensates for PCB trace IR drop between regulator output and SoC power pins, maintaining ±0.5% regulation at point-of-load |
| Integrated current sensing | On-die ADC measures total output current (0–20.47 A range, 20-mA resolution) without external shunt resistors or layout impact |
| Configurable soft-start slew rate | Programmable 3.23–4.4 mV/µs output ramp minimizes inrush current and overshoot during power-up sequences |
| Spread-spectrum modulation | Reduces peak EMI emissions by spreading switching energy across a 100-kHz band around 3-MHz center frequency |
Applications
| Automotive Infotainment | Cluster Display Power |
|---|---|
Use Scenario: Powering high-performance SoCs (e.g., Qualcomm SA8155P, NXP i.MX8) in head-unit systems requiring stable 1-V core rails with fast transient response. IC Role / Device Role / Timing Role: Primary 4-phase buck controller delivering 10-A core voltage with synchronized start-up sequencing and PGOOD handshaking to SoC. Use Value: Enables <12-mV load-step deviation and <200-µs soft-start time, meeting strict SoC power-on timing and voltage tolerance requirements. |
Use Scenario: Supplying instrument cluster MCUs and graphics processors where EMI-sensitive analog sensors coexist on same PCB. IC Role / Device Role / Timing Role: Multiphase regulator with spread-spectrum mode and external clock sync to suppress switching noise near CAN/LIN transceivers and analog front-ends. Use Value: Achieves >10 dB EMI reduction at fundamental and harmonic frequencies, eliminating need for additional shielding or ferrite beads. |
| Radar Processing Unit | ADAS Camera Module |
Use Scenario: Powering millimeter-wave radar DSPs (e.g., TI AWR2944) demanding ultra-low-noise, tightly regulated 1-V supplies with thermal resilience. IC Role / Device Role / Timing Role: High-efficiency buck converter with die-temperature monitoring and programmable thermal warning interrupts for system-level thermal management. Use Value: Provides real-time junction temperature telemetry and early-warning alerts before thermal throttling, preserving radar processing throughput. |
Use Scenario: Delivering clean, sequenced power to image signal processors (ISPs) and high-speed MIPI interfaces in surround-view camera modules. IC Role / Device Role / Timing Role: Four-phase regulator with GPIO-controlled sequencing to coordinate ISP core, I/O, and sensor bias rails using EN1/EN2/EN3 pins. Use Value: Eliminates external sequencing ICs by enabling precise, register-programmable startup/shutdown delays and inter-rail dependencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65917-Q1 | Single-chip PMIC with 3 buck converters (not 4-phase); max 3-A per buck; no integrated current sensing | Targets lower-power infotainment SoCs; lacks 10-A capability and differential sensing for high-end radar/camera | Choose for cost-sensitive designs needing integrated LDOs and battery charging, not high-current 1-V rails |
| LM63625-Q1 | Single-phase 2.5-A buck; 3-MHz fixed frequency; no I²C, no multiphase support, no current sensing | Suitable only for auxiliary rails (e.g., memory, I/O); cannot replace LP875701ARNFRQ1's 10-A core supply function | Use only as supplemental regulator where 4-phase performance and telemetry are unnecessary |
Compared with TPS65917-Q1 and LM63625-Q1, the LP875701ARNFRQ1 uniquely delivers 10-A 1-V output with per-phase current limiting, differential remote sensing, and real-time load-current telemetry - making it irreplaceable for high-performance automotive processor core power delivery.
Availability
LP875701ARNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, digital cluster, and ADAS camera applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP875701ARNFRQ1 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in automotive power management and functional-safety-certified ICs.
The LP875701ARNFRQ1 belongs to TI's automotive-grade power management IC portfolio, designed specifically for high-current, low-voltage core power delivery in safety-critical ADAS and infotainment systems.
FAQ
What is the exact output voltage accuracy of the LP875701ARNFRQ1 under full operating conditions?
The LP875701ARNFRQ1 delivers a fixed 1.0-V output with DC accuracy of ±15 mV (0.985 V to 1.015 V) across –40°C to +140°C junction temperature, 2.8–5.5-V input, and full 10-A load - including line, load, process, and temperature variations per TI SNVSA05A datasheet Section 6.5.
Does the LP875701ARNFRQ1 support external clock synchronization, and what frequency range is valid?
Yes, the LP875701ARNFRQ1 supports external clock synchronization via the CLKIN pin, accepting nominal frequencies from 1 MHz to 24 MHz in 1-MHz steps. The device detects missing clocks within 1.8 µs and switches to internal oscillator with 600-µs transition delay, ensuring robust timing control in noisy automotive environments.
How does the LP875701ARNFRQ1 implement load-current measurement without external sense resistors?
The LP875701ARNFRQ1 uses on-die current-sense amplifiers and ADCs to measure total output current with 20-mA LSB resolution and <10% error above 1 A. This eliminates external shunts while providing real-time telemetry for thermal derating and system diagnostics - a capability confirmed in Section 6.5 and Section 7.3.1.1 of the LP875701ARNFRQ1 datasheet.
What thermal protection features are built into the LP875701ARNFRQ1, and how are they configured?
The LP875701ARNFRQ1 includes programmable die-temperature warning (115–135°C) and hard thermal shutdown (140–160°C), both with 20°C hysteresis. Warning status triggers nINT and registers; shutdown forces all regulators off. Configuration is done via I²C-accessible registers TDIE_WARN_LEVEL and thermal shutdown enable bits per Section 6.5 and 7.3.5.
Can the LP875701ARNFRQ1's EN1, EN2, and EN3 pins be used as general-purpose I/Os, and what configurations are supported?
Yes - EN1, EN2, and EN3 are fully programmable as GPIOs with direction (input/output), drive type (push-pull or open-drain), and pullup/pulldown control via I²C registers. They retain enable functionality for buck regulators but can alternatively control external loads, reset signals, or status indicators - as documented in Table 5-1 and Section 7.3.4 of the LP875701ARNFRQ1 datasheet.
LP875701ARNFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 26-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 10A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 26-VQFN-HR (4.5x4)
LP875701ARNFRQ1 FAQ
1.How can I place an order for LP875701ARNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP875701ARNFRQ1 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 LP875701ARNFRQ1 reliable?
The price and inventory of LP875701ARNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP875701ARNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP875701ARNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP875701ARNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP875701ARNFRQ1?
LP875701ARNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP875701ARNFRQ1 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 LP875701ARNFRQ1?
For technical support, including LP875701ARNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP875701ARNFRQ1 requirements.
6.How does Aetrix verify that LP875701ARNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP875701ARNFRQ1 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 LP875701ARNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP875701ARNFRQ1?
All LP875701ARNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP875701ARNFRQ1, 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 LP875701ARNFRQ1 part is unused and in its original packaging.
Return procedure for LP875701ARNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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