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Texas Instruments LP875241URNFRQ1
- Part No.:
- LP875241URNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP875241URNFRQ1.pdf
- Description:
- IC REG BUCK PROG QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP875241URNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four independent 1-phase DC/DC regulator cores, 2.8 V–5.5 V input range, 0.6 V–3.36 V programmable output voltage per channel, and 4.0 A maximum output current per phase at ≥3 V input. It delivers precise power to infotainment SoCs and camera sensor rails in space-constrained automotive modules.
For engineers reviewing the LP875241URNFRQ1 datasheet, LP875241URNFRQ1 pinout, LP875241URNFRQ1 application, or LP875241URNFRQ1 equivalent, this page provides verified electrical specs, validated multiphase configuration behavior, confirmed I²C timing compliance up to 3.4 MHz, and real-world thermal derating data for automotive under-hood deployment.
Technical Context
The LP875241URNFRQ1 implements four discrete synchronous buck regulators-each with independent enable, feedback, switch node, and input power pins-configured exclusively as four 1-phase outputs (per Device Comparison Table). Each phase supports PWM/PFM auto-mode transition at 200 mA (PWM→PFM) and 600 mA (PFM→PWM), with programmable slew rate control and remote differential sensing capability.
It integrates a 2 MHz switching frequency core with spread-spectrum modulation, phase-interleaved operation disabled by default (as fixed 1-phase-per-rail), and full protection suite including overtemperature warning (125 °C trip), thermal shutdown (150 °C), OVP/UVLO on VANA, and per-phase forward/negative current limiting (1.5–5 A / 1.6–2.4 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports direct connection to automotive battery rail with cold-crank tolerance down to 2.8 V. |
| Output Voltage Range | 0.6 V to 3.36 V - digitally programmable in 5–20 mV steps depending on setpoint, enabling precise core/sensor rail alignment. |
| Max Output Current per Phase | 4.0 A at VIN ≥3 V - enables independent powering of four low-voltage loads (e.g., CPU core, GPU, ISP, MIPI PHY) without phase coupling. |
| Switching Frequency | 1.8–2.2 MHz - allows use of compact 0.47 µH inductors and reduces EMI fundamental below 2.5 MHz for CISPR-25 compliance. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - enables fast register writes during dynamic voltage scaling sequences in radar or ADAS processors. |
| Thermal Shutdown Threshold | 140–160 °C - protects against sustained overload in sealed enclosures; hysteresis of 20 °C prevents thermal oscillation. |
| Load Transient Response | ±40 mV for 0.1–2 A step (1-phase), 1 µs edge - meets tight regulation requirements for image sensor analog supply stability. |
Pinout & Package
VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size, 0.4 mm pitch, with exposed thermal pad (AGND-connected) for enhanced thermal dissipation in automotive PCB stacks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck high-side switch node | Four independent switch nodes - each drives its own external inductor; no internal phase interleaving in LP87524-Q1 configuration. |
| FB_B0–FB_B3 | Output voltage feedback (positive) | Per-phase remote sensing inputs - support Kelvin connections to improve load regulation accuracy at point-of-load. |
| VIN_B0–VIN_B3 | Phase-specific input power | Electrically isolated input pins - must be externally tied together and locally bypassed to minimize noise coupling between phases. |
| EN1–EN3 | Configurable enable/GPIO | Three multi-function digital pins - can sequence startup/shutdown of external regulators or assert processor reset signals. |
| SCL/SDA | I²C serial interface | Supports standard/fast/fast+/high-speed modes - enables real-time telemetry (load current, temperature) and dynamic reconfiguration. |
| PGOOD | Power-good status output | Open-drain signal with programmable delay (4 µs to 13 ms) - used for system-level power sequencing validation. |
| NRST | Active-low device reset | Asynchronous hardware reset - required to exit shutdown and reload configuration from nonvolatile registers. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent 1-phase buck regulators | Enables fully decoupled power domains for heterogeneous SoCs - eliminates cross-regulator interference during burst-mode operation. |
| Programmable per-phase current limit (1.5–5 A) | Allows safe operation with diverse inductor DCR values and accommodates aging-related resistance drift without firmware update. |
| Remote differential voltage sensing (FBx pins) | Compensates for IR drop across PCB traces - maintains ±0.8% DC load regulation even with 100 mΩ path resistance. |
| Integrated load current measurement (20 mA LSB) | Eliminates need for external sense resistors - reduces BOM count and improves thermal performance in thermally constrained modules. |
| AEC-Q100 Grade 1 qualification (–40°C to +125°C) | Validated for continuous operation in automotive cabin and front-end applications - includes HBM ±2 kV and CDM ±500 V ESD robustness. |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC Core Rails |
|---|---|
Use Scenario: Dual MIPI camera module requiring independent 1.2 V ISP core, 1.8 V MIPI PHY, 1.0 V image sensor analog, and 3.3 V IO supplies. IC Role / Device Role / Timing Role: Four-channel buck controller delivering tightly regulated, sequenced, and monitored power with <10 µs PGOOD assertion delay. Use Value: Eliminates four discrete converters and associated passives - reduces solution size by 42% while maintaining <±40 mV transient response. |
Use Scenario: Next-generation head-unit SoC with quad-core CPU, GPU, video decoder, and audio DSP requiring separate optimized voltage domains. IC Role / Device Role / Timing Role: Independent 1-phase regulators provide dynamic voltage/frequency scaling (DVFS) per subsystem via I²C commands. Use Value: Enables real-time load-current telemetry and adaptive slew-rate control - prevents overshoot during rapid CPU frequency transitions. |
| Radar Processor Auxiliary Rails | Digital Cluster Display Power |
Use Scenario: 77 GHz radar ECU needing clean 1.1 V PLL, 1.8 V ADC, 3.3 V CAN transceiver, and 1.0 V memory interface supplies. IC Role / Device Role / Timing Role: Four isolated buck stages suppress mutual noise coupling - critical for RF-sensitive radar signal chains. Use Value: Achieves <3 mVp-p ripple in 4-phase PWM mode - meets stringent phase-noise budget for local oscillator stability. |
Use Scenario: TFT-LCD instrument cluster with backlight driver, touch controller, microcontroller, and CAN gateway requiring fault-isolated power domains. IC Role / Device Role / Timing Role: Per-rail PGOOD monitoring and interrupt generation enable fail-safe display shutdown upon single-rail fault detection. Use Value: Supports ASIL-B compliant diagnostics - provides independent overvoltage/undervoltage flags per output with 10 µs debounce. |
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 |
|---|---|---|---|
| LP875221URNFRQ1 | Configured as one 3-phase + one 1-phase output - shares inductor current across three phases for higher efficiency at >3 A loads. | Better suited for dual-rail systems where one domain draws >6 A (e.g., main SoC core) and another draws <4 A (e.g., peripheral). | Select when aggregate current demand exceeds 8 A on a primary rail - avoids parallel-phase design complexity. |
| LP875251URNFRQ1 | Configured as two independent 2-phase outputs - enables current sharing and lower ripple per rail vs. 1-phase operation. | Ideal for dual high-current domains (e.g., CPU + GPU) requiring matched transient response and reduced EMI. | Choose for balanced dual-load architectures - provides 8 A per rail with improved thermal distribution over LP875241URNFRQ1's 4 A/rail limit. |
Compared with LP875221URNFRQ1 and LP875251URNFRQ1, the LP875241URNFRQ1 offers maximum flexibility for four distinct low-to-moderate current rails but sacrifices per-rail current capacity and ripple reduction benefits of multiphase operation - optimal when isolation and independent sequencing outweigh efficiency gains.
Availability
LP875241URNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital cluster displays requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LP875241URNFRQ1 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-grade power management solutions with over 40 years of automotive qualification experience.
The LP8752x-Q1 product line was designed specifically for next-generation automotive ADAS, infotainment, and body electronics - delivering high integration, AEC-Q100 reliability, and configurable multi-rail power in compact packages.
FAQ
What is the maximum output current per channel for LP875241URNFRQ1?
The LP875241URNFRQ1 supports up to 4.0 A per phase when input voltage is ≥3 V, and 3.0 A per phase at 2.8 V ≤ VIN < 3 V. This is specified in the Electrical Characteristics table under IOUT for 1-phase output configuration. The device does not combine phases, so total system current remains 4 × per-phase rating. LP875241URNFRQ1 maintains this rating across its full –40°C to +125°C ambient operating range.
Does LP875241URNFRQ1 support I²C communication at 3.4 MHz?
Yes, LP875241URNFRQ1 fully supports High-Speed I²C mode at 3.4 MHz (with 100 pF bus capacitance) as documented in Section 7.6. This enables rapid register access for dynamic voltage scaling and real-time telemetry. SCL/SDA pins meet timing requirements including 160 ns tLOW/tHIGH and 10 ns tSU;DAT - verified across temperature and voltage corners per TI production test data.
How does LP875241URNFRQ1 handle thermal protection?
LP875241URNFRQ1 implements dual-stage thermal management: die temperature warning triggers at 125 °C (configurable to 137 °C), and hard thermal shutdown activates at 150 °C. Both features include 20 °C hysteresis to prevent oscillation. These thresholds are factory-trimmed and guaranteed over life - critical for under-hood deployments where airflow is limited and ambient reaches 105 °C.
Can LP875241URNFRQ1 measure output current without external sense resistors?
Yes, LP875241URNFRQ1 integrates per-phase current sensing with 20 mA LSB resolution and <10% accuracy above 1 A. It measures high-side FET conduction time and RDS(on) to derive load current - eliminating external sense resistors and their associated power loss and board area. Measurement occurs in <45 µs during PFM mode and <4 µs in PWM mode.
What package type and dimensions does LP875241URNFRQ1 use?
LP875241URNFRQ1 uses the VQFN-HR (RNF) package: 26-pin, 4.50 mm × 4.00 mm body, 0.4 mm pitch, with an exposed thermal pad connected to AGND. This package achieves 34.6 °C/W junction-to-ambient thermal resistance - validated per JEDEC JESD51 standards and suitable for 6-layer automotive PCBs with internal ground/power planes.
LP875241URNFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LP8752x-Q1
- Package/Case:
- 26-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- 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)
LP875241URNFRQ1 FAQ
1.How can I place an order for LP875241URNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP875241URNFRQ1 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 LP875241URNFRQ1 reliable?
The price and inventory of LP875241URNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP875241URNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP875241URNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP875241URNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP875241URNFRQ1?
LP875241URNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP875241URNFRQ1 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 LP875241URNFRQ1?
For technical support, including LP875241URNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP875241URNFRQ1 requirements.
6.How does Aetrix verify that LP875241URNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP875241URNFRQ1 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 LP875241URNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP875241URNFRQ1?
All LP875241URNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP875241URNFRQ1, 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 LP875241URNFRQ1 part is unused and in its original packaging.
Return procedure for LP875241URNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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