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Texas Instruments LP875241JRNFRQ1
- Part No.:
- LP875241JRNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP875241JRNFRQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
LP875241JRNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four independent 1-phase DC/DC regulators, 2.8–5.5 V input, 0.6–3.36 V programmable output per channel, 2 MHz switching frequency, and I²C interface supporting up to 3.4 MHz. It delivers up to 4 A total output current (1 A per phase) and targets infotainment, ADAS camera, and cluster power rails.
For engineers reviewing the LP875241JRNFRQ1 datasheet, LP875241JRNFRQ1 pinout, LP875241JRNFRQ1 application, or LP875241JRNFRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed multiphase configuration limits, real-world efficiency curves at 1.8 V output, and automotive-grade protection features including thermal warning, OVP/UVLO, and PGOOD programmability.
Technical Context
The LP875241JRNFRQ1 implements four fully independent buck regulator cores-each configurable as a standalone 1-phase output-enabling flexible rail partitioning across processor cores, memory, sensors, or peripherals. Its AUTO mode dynamically transitions between PWM and PFM based on load, while phase shedding (e.g., 4→3→2→1-phase) optimizes light-load efficiency without external control logic.
It supports remote differential voltage sensing per channel via dedicated FB pins, enabling accurate point-of-load regulation despite PCB IR drop. The integrated I²C controller allows full register access for voltage sequencing, slew-rate control, current limit programming, and interrupt masking-critical for synchronized startup/shutdown in multi-rail automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports direct connection to automotive battery (cold-crank tolerant down to 2.8 V) |
| Output Voltage Range | 0.6 V to 3.36 V in 5–20 mV steps - covers core logic, I/O, and analog supply requirements |
| Max Output Current | 1 A per phase (4 A total) - defined by thermal limits and forward current limit (ILIM FWD = 1.5–5 A, programmable) |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz) - enables compact 0.47 µH inductors and <10 mVpp ripple in PWM mode |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - allows fast register writes during dynamic voltage scaling sequences |
| Thermal Protection | Die temperature warning at 115–147 °C (configurable), shutdown at 140–160 °C - meets AEC-Q100 Grade 1 ambient (−40 to +125 °C) |
| PGOOD Accuracy | ±40 mV overvoltage/undervoltage threshold - ensures reliable system power-good assertion before processor release |
Pinout & Package
VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size, with exposed thermal pad for enhanced thermal performance in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B0–FB_B3 | Feedback input (positive) | Per-channel voltage sense for closed-loop regulation; supports remote sensing to compensate PCB trace resistance |
| VIN_B0–VIN_B3 | Input power supply | Independent input pins per buck channel - must be externally tied together and locally bypassed |
| SW_B0–SW_B3 | Switch node | Connects to external inductor; high-side/low-side FETs integrated (RDS(on) HS = 29–65 mΩ, LS = 17–35 mΩ) |
| EN1–EN3 | Enable / GPIO | Configurable as enable signals or general-purpose outputs; support hardware-controlled sequencing of external regulators |
| SCL / SDA | I²C interface | Supports Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes with programmable pull-up |
| PGOOD | Power-good indicator | Open-drain output with programmable debounce (4 µs to 13 ms); asserts after soft-start and voltage accuracy validation |
| nINT | Interrupt output | Active-low open-drain signal for fault reporting (OVP, UVLO, thermal, current limit) with maskable sources |
Key Features
| Feature | Design Value |
|---|---|
| Four independent 1-phase buck regulators | Enables discrete rail assignment for SoC cores, DDR, camera ISPs, and display interfaces without external controllers |
| Programmable output slew rate | Fixed values from 0.47 to 10 mV/µs - prevents inrush current and overshoot during voltage transitions |
| Integrated current measurement | 20 mA LSB resolution, <10% accuracy above 1 A - eliminates need for external sense resistors and ADC |
| Spread-spectrum and phase interleaving | Reduces EMI peak amplitude and input capacitor RMS current - critical for CISPR 25 Class 5 compliance |
| Automated PWM/PFM transition | PFM-to-PWM threshold at 600 mA, PWM-to-PFM at 200 mA - maintains >85% efficiency from 1 mA to full load |
Applications
| Infotainment Processor Core Rail | ADAS Camera Sensor Power |
|---|---|
Use Scenario: Powering ARM Cortex-A72/A76 CPU cores requiring tightly regulated 0.8–1.1 V at up to 1 A with fast transient response. IC Role / Device Role / Timing Role: Primary buck regulator delivering dynamic voltage scaling (DVS) via I²C commands synchronized to processor workload changes. Use Value: Achieves ±2% DC accuracy and ±40 mV transient deviation (0–1 A step, 1 µs edge) - ensures stable execution under burst loads. |
Use Scenario: Supplying image signal processors (ISPs) and CMOS image sensors in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Dedicated 1.8 V rail generator with remote sensing to maintain voltage at sensor die despite 50 mΩ PCB trace resistance. Use Value: Compensates for IR drop using FB_Bx differential sensing - sustains 1.8 V ±15 mV at point-of-load under 800 mA load. |
| Automotive Cluster Display Logic | Radar MCU I/O Supply |
Use Scenario: Providing clean 3.3 V power to TFT-LCD timing controllers and touch controller interfaces in digital instrument clusters. IC Role / Device Role / Timing Role: Low-noise 1-phase buck with spread-spectrum modulation to suppress switching noise near sensitive analog front-ends. Use Value: Delivers <8 mVpp ripple in PWM mode - avoids visible flicker or ghosting on high-resolution displays. |
Use Scenario: Powering 3.3 V I/O banks of millimeter-wave radar microcontrollers operating in harsh thermal environments. IC Role / Device Role / Timing Role: Thermally robust regulator with die temperature warning (125 °C threshold) and automatic shutdown (150 °C) to prevent field failure. Use Value: Maintains operation up to +125 °C ambient with RθJA = 34.6 °C/W - enables placement near radar RF modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP875221JRNFRQ1 | Configured as one 3-phase + one 1-phase output; higher per-phase current capability (up to 9 A total) | Better suited for single high-current rail (e.g., GPU core) plus auxiliary low-current rail | Select when needing >1 A per rail with shared phase resources rather than four independent 1-A rails |
| LP875251JRNFRQ1 | Configured as two 2-phase outputs; supports up to 8 A total with interleaved ripple cancellation | Optimized for dual high-current rails (e.g., SoC core + memory) requiring lower input capacitance | Choose for balanced dual-rail designs where phase interleaving reduces input capacitor stress and EMI |
Compared with LP875221JRNFRQ1 and LP875251JRNFRQ1, the LP875241JRNFRQ1 uniquely provides four isolated 1-phase outputs-enabling independent voltage programming, sequencing, and fault management per rail-making it optimal for heterogeneous SoC subsystems requiring strict rail isolation and flexibility.
Availability
LP875241JRNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera, and digital cluster power applications requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LP875241JRNFRQ1 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 leader specializing in analog, embedded processing, and automotive power management solutions, with decades of automotive qualification expertise.
The LP8752x-Q1 product line was designed specifically for next-generation automotive domain controllers and ADAS platforms, integrating high-efficiency conversion, precise sequencing, and functional safety-ready monitoring into a single AEC-Q100-compliant package.
FAQ
What is the maximum output current per channel for LP875241JRNFRQ1?
The LP875241JRNFRQ1 supports up to 1 A per channel in its four 1-phase configuration. This is limited by the forward current limit (ILIM FWD) setting and thermal constraints - with typical operation sustaining 1 A continuously at +85 °C ambient when properly heatsinked. The device's total output capability is 4 A, distributed independently across channels.
Does LP875241JRNFRQ1 support remote voltage sensing?
Yes, LP875241JRNFRQ1 supports true remote differential voltage sensing per channel via dedicated FB_B0–FB_B3 pins. Each feedback pair measures the voltage directly at the load, compensating for PCB trace resistance and ensuring ±2% DC accuracy at the point-of-load - critical for high-current, low-voltage rails like CPU cores.
Can LP875241JRNFRQ1 operate with an external clock source?
Yes, LP875241JRNFRQ1 accepts an external clock via the CLKIN pin, supporting nominal frequencies from 1 MHz to 24 MHz with ±30% tolerance. Using an external clock enables synchronization to system timing references, reducing beat-frequency EMI and enabling deterministic phase alignment across multiple LP8752x-Q1 devices.
How does the PGOOD function work on LP875241JRNFRQ1?
The PGOOD pin on LP875241JRNFRQ1 is an open-drain output that asserts high only after all enabled buck regulators reach their target voltage within ±2% tolerance and remain stable for a programmable debounce period (4 µs to 13 ms). It supports both status bit reporting and interrupt generation (BUCKx_PG_INT) for system-level power sequencing.
Is LP875241JRNFRQ1 pin-compatible with other LP8752x-Q1 variants?
No, LP875241JRNFRQ1 is not pin-compatible with LP87521-Q1, LP87522-Q1, LP87523-Q1, or LP87525-Q1. While all share the same VQFN-HR (26-pin) package footprint and thermal pad, pin functions differ significantly - for example, FB_B1 serves as negative feedback for BUCK0 in LP875241JRNFRQ1 but as positive feedback for BUCK1 in LP87522-Q1.
LP875241JRNFRQ1 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:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 3.36V
- Current - Output:
- 4A, 4A, 4A, 4A
- Frequency - Switching:
- 2MHz
- 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)
LP875241JRNFRQ1 FAQ
1.How can I place an order for LP875241JRNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP875241JRNFRQ1 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 LP875241JRNFRQ1 reliable?
The price and inventory of LP875241JRNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP875241JRNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP875241JRNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP875241JRNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP875241JRNFRQ1?
LP875241JRNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP875241JRNFRQ1 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 LP875241JRNFRQ1?
For technical support, including LP875241JRNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP875241JRNFRQ1 requirements.
6.How does Aetrix verify that LP875241JRNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP875241JRNFRQ1 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 LP875241JRNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP875241JRNFRQ1?
All LP875241JRNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP875241JRNFRQ1, 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 LP875241JRNFRQ1 part is unused and in its original packaging.
Return procedure for LP875241JRNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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