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Texas Instruments LP87524JRNFTQ1
- Part No.:
- LP87524JRNFTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87524JRNFTQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
LP87524JRNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad-buck DC-DC converter IC designed for radar and imaging MMIC power delivery. It delivers up to 10 A total output current across four independent 4-MHz synchronous buck regulators, supports I²C programmability (up to 3.4 MHz), and provides configurable GPIOs and PGOOD signaling - deployed in AWR/IWR radar systems requiring precise, low-noise, phase-interleaved rail sequencing.
For engineers reviewing the LP87524JRNFTQ1 datasheet, LP87524JRNFTQ1 pinout, LP87524JRNFTQ1 application, or LP87524JRNFTQ1 equivalent, key selection criteria include its 2.8–5.5 V input range, 0.6–3.36 V programmable output voltage per channel, 3.8 mV/µs slew-rate control, spread-spectrum operation, and remote sensing capability for point-of-load accuracy in safety-critical automotive radar modules.
Technical Context
The LP87524JRNFTQ1 integrates four independent buck converter cores with integrated high-side and low-side FETs (RDS(ON) HS: 29–65 mΩ; LS: 17–35 mΩ), operating at 4 MHz nominal switching frequency (3.6–4.4 MHz PWM mode) with automatic PFM/PWM transition at 200 mA/600 mA thresholds. Each regulator supports remote voltage sensing via dedicated FB pins and programmable soft-start with slew-rate limiting to suppress inrush and overshoot during startup or dynamic voltage changes.
Control is implemented via a robust I²C interface supporting Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes, with interrupt masking, configurable GPIOs (EN1/EN2/EN3), external clock synchronization (1–24 MHz), and comprehensive protection including overtemperature warning (115–147 °C), thermal shutdown (140–160 °C), OVP/UVP on VANA and output rails, and short-circuit/overload detection per phase.
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 transient tolerance and UVLO (2.51–2.75 V) and OVP (5.6–6.1 V) protection. |
| Output Voltage Range | 0.6 V to 3.36 V per buck - programmable in 10 mV (≤0.73 V), 5 mV (0.73–1.4 V), or 20 mV (≥1.4 V) steps for precision digital/analog/RF rail generation. |
| Max Output Current | 10 A total (Buck0: 1.5 A, Buck1: 1.5 A, Buck2: 4 A, Buck3: 2.5 A) - enables single-chip power for multi-rail AWR/IWR radar SoCs without external current-sharing. |
| Switching Frequency | 4 MHz nominal (3.6–4.4 MHz PWM) - enables ultra-small external LC components (0.47 µH inductor, 22 µF output cap per phase) and reduces EMI in sensitive RF bands. |
| Efficiency Peak | ≥90% at 1–5 A loads (1 V/1.8 V/2.5 V outputs) - achieved via low RDS(ON) FETs, phase interleaving, and AUTO mode PFM/PWM optimization across wide load range. |
| I²C Interface Speed | Up to 3.4 MHz High-Speed mode - allows rapid register configuration and real-time telemetry (e.g., load current measurement resolution: 20 mA, accuracy: <10% above 1 A). |
| Thermal Protection | Die temperature warning (115–147 °C) and shutdown (140–160 °C) with 20 °C hysteresis - ensures safe operation under sustained high-power radar transmit conditions. |
Pinout & Package
The LP87524JRNFTQ1 is housed in a 26-pin VQFN-HR (RNF) package measuring 4.50 mm × 4.00 mm with exposed thermal pad, optimized for automotive PCB layouts requiring high thermal dissipation and compact footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B0–FB_B3 | Feedback input (x4) | Remote sense inputs for individual buck outputs - enable accurate regulation at point-of-load by compensating PCB IR drop. |
| SW_B0–SW_B3 | Switch node (x4) | High-frequency switching nodes connecting internal FETs to external inductors - require tight layout and local high-frequency decoupling. |
| VIN_B0–VIN_B3 | Input power (x4) | Independent input pins per buck - must be externally tied together and locally bypassed to minimize cross-regulator coupling and noise injection. |
| EN1/EN2/EN3 | Enable/GPIO (x3) | Multi-function pins supporting buck enable, dual-voltage selection, or programmable push-pull/open-drain GPIO - used for sequenced startup and external device control. |
| SCL/SDA | I²C interface | Standard-compliant bidirectional bus interface - supports up to 3.4 MHz operation with internal pull-up options and Schmitt-trigger inputs for noise immunity. |
| PGOOD | Power-good output | Programmable open-drain or push-pull signal indicating all enabled rails are within ±2% (≥1 V) or ±20 mV (<1 V) of target - used for system-level power sequencing validation. |
| NRST/nINT | Reset/interrupt | Active-low reset input (NRST) and open-drain interrupt output (nINT) - support fault reporting (OVP, UVP, thermal) and synchronized system reset initiation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 4-MHz Buck Architecture | Four independent, phase-interleaved buck converters reduce input/output ripple and allow smaller passive components versus lower-frequency alternatives. |
| Spread-Spectrum Modulation | Reduces peak EMI amplitude by spreading switching energy across a narrow band - critical for meeting CISPR-25 Class 5 emissions limits in radar modules. |
| Programmable Slew Rate | 3.23–4.4 mV/µs controlled ramp rate minimizes output overshoot and inrush current during startup/voltage transitions - protects downstream MMICs and LDOs. |
| Load Current Measurement | On-die current sensing per phase (20 mA LSB, <10% error >1 A) eliminates need for external sense resistors - saves board space and improves thermal performance. |
| Automotive Safety Compliance | AEC-Q100 Grade 1 qualification (−40°C to +125°C ambient), integrated thermal warning/shutdown, and robust ESD protection (±2 kV HBM, ±750 V CDM corner pins) meet ASIL-B readiness requirements. |
Applications
| Radar Transceiver Power | Automotive Cluster Display |
|---|---|
|
Use Scenario: Powers TI AWR1642/AWR1843 radar SoCs with separate 3.3 V (IO), 1.2 V (digital core), 1.0 V (RF PLL), and 1.8 V (RF analog) rails. IC Role / Device Role / Timing Role: Primary quad-rail PMIC delivering tightly regulated, sequenced, low-noise power with remote sensing and fast transient response. Use Value: Enables single-chip power solution eliminating discrete buck controllers and reducing BOM count by ≥4 ICs while maintaining <±2% output accuracy under dynamic radar TX/RX load steps. |
Use Scenario: Supplies display controller, GPU, and touch interface in digital instrument clusters with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Multi-output power manager providing independent voltage domains with programmable startup delays and GPIO-controlled reset coordination. Use Value: Supports simultaneous rail ramp-up with <10 µs PGOOD debounce and <200 µs soft-start - prevents display flicker and ensures deterministic boot timing across temperature. |
| ADAS Camera Module | Vehicle Infotainment Processor |
|
Use Scenario: Powers image sensor (1.2 V), ISP (1.8 V), and MIPI PHY (2.5 V) in 8 MP surround-view camera systems. IC Role / Device Role / Timing Role: Compact, high-efficiency quad-buck supplying isolated, low-ripple rails with spread-spectrum EMI reduction for pixel-perfect image capture. Use Value: Achieves <4 mVp-p ripple in PWM mode (COUT = 22 µF, L = 0.47 µH) - prevents sensor pattern noise and ensures clean analog video signal integrity. |
Use Scenario: Delivers core (0.8 V), memory (1.1 V), I/O (1.8 V), and audio codec (3.3 V) rails for NXP i.MX8 or Qualcomm SA8155P in head-unit designs. IC Role / Device Role / Timing Role: Configurable power sequencer with I²C telemetry and GPIO-driven external LDO control for flexible SoC power management. Use Value: Enables firmware-defined rail sequencing and real-time load monitoring - simplifies compliance testing and supports dynamic voltage scaling for thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87524BRNFTQ1 | Same pinout and feature set; differs only in factory-programmed default output voltages (Buck2 = 3.3 V vs. J's 1.0 V) and max current per rail (Buck2 = 4 A vs. J's 4 A, but Buck0/Buck1 = 1.5 A same). | Optimized for infotainment IO/digital rails; less suitable for radar RF core where 1.0 V/4 A is required. | Select LP87524JRNFTQ1 when powering AWR/IWR MMICs needing 1.0 V @ 4 A on Buck2 with ferrite-filtered output. |
| TPS65917B1ZWSR | 7-channel PMIC with integrated LDOs, RTC, and charger; lower switching frequency (2.2 MHz), no spread-spectrum, and fixed 1.0 V/1.2 V/1.8 V/3.3 V defaults. | Targets general-purpose infotainment processors; lacks radar-specific features like remote sensing per buck and programmable slew rate. | Choose LP87524JRNFTQ1 over TPS65917B1ZWSR when EMI-sensitive radar RF power, independent rail control, and precise dynamic response are mandatory. |
Compared with LP87524BRNFTQ1 and TPS65917B1ZWSR, the LP87524JRNFTQ1 uniquely combines 4-MHz operation, per-rail remote sensing, programmable slew rate, and AWR/IWR-optimized default settings - making it the only option enabling compact, low-EMI, high-accuracy radar MMIC power without external compensation or sequencing logic.
Availability
LP87524JRNFTQ1 is available at Aetrix Electronics and suitable for automotive radar, ADAS camera modules, and digital cluster applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP87524JRNFTQ1 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 power management technologies, with deep expertise in automotive-grade IC design and functional safety.
The LP87524JRNFTQ1 belongs to TI's automotive power management portfolio, engineered specifically for millimeter-wave radar and imaging systems - delivering high-density, low-noise, and ASIL-ready power solutions for next-generation ADAS platforms.
FAQ
What is the maximum total output current supported by the LP87524JRNFTQ1?
The LP87524JRNFTQ1 supports up to 10 A total output current across its four buck regulators: Buck0 (1.5 A), Buck1 (1.5 A), Buck2 (4 A), and Buck3 (2.5 A). These values reflect the device's rated continuous current capability under recommended operating conditions (TA ≤ 125°C, proper thermal layout). The LP87524JRNFTQ1 achieves this with integrated FETs and 4-MHz switching, enabling compact designs without external current-sharing circuitry.
Does the LP87524JRNFTQ1 support external clock synchronization?
Yes, the LP87524JRNFTQ1 supports external clock synchronization via the CLKIN pin, accepting input frequencies from 1 MHz to 24 MHz in 1-MHz steps. This feature allows alignment of switching edges across multiple LP87524JRNFTQ1 devices or with system clocks to minimize beat frequencies and improve EMI performance - essential in multi-radar vehicle configurations. Internal PLL ensures low jitter (<300 ps p-p) when using external reference.
How does the LP87524JRNFTQ1 implement load current measurement?
The LP87524JRNFTQ1 performs on-die load current measurement per buck channel without external sense resistors, using internal current-sense amplifiers. It offers 20 mA LSB resolution, <10% accuracy above 1 A, and measurement times of 45 µs (PFM) or 4 µs (PWM). This data is accessible via I²C registers and enables real-time telemetry, fault detection, and adaptive thermal management - directly enhancing system reliability in LP87524JRNFTQ1-based radar power designs.
What protection features are integrated into the LP87524JRNFTQ1?
The LP87524JRNFTQ1 integrates comprehensive protection: overvoltage/undervoltage lockout on VANA (2.51–2.75 V UVLO, 5.6–6.1 V OVP), per-buck output monitoring (±2% or ±20 mV thresholds), thermal warning (115–147 °C) and shutdown (140–160 °C), short-circuit/overload detection, and input overcurrent limiting (2.0–6.0 A depending on VIN and rail). All protections trigger configurable interrupts or status flags readable via I²C, ensuring robust operation in LP87524JRNFTQ1 automotive deployments.
Is the LP87524JRNFTQ1 pin-compatible with other variants in the LP87524x-Q1 family?
Yes, the LP87524JRNFTQ1 shares identical pinout, package (26-pin VQFN-HR, 4.5 mm × 4.0 mm), and electrical interface with LP87524BRNFTQ1 and LP87524PRNFTQ1. Differences are limited to factory-programmed default output voltages and per-rail current capabilities - meaning hardware designs can reuse the same PCB layout across variants, simplifying platform scalability and reducing qualification effort for LP87524JRNFTQ1-based automotive systems.
LP87524JRNFTQ1 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:
- 4MHz
- 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)
LP87524JRNFTQ1 FAQ
1.How can I place an order for LP87524JRNFTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87524JRNFTQ1 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 LP87524JRNFTQ1 reliable?
The price and inventory of LP87524JRNFTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87524JRNFTQ1 is usually 5 days.
3.What payment methods are accepted for LP87524JRNFTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87524JRNFTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87524JRNFTQ1?
LP87524JRNFTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87524JRNFTQ1 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 LP87524JRNFTQ1?
For technical support, including LP87524JRNFTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87524JRNFTQ1 requirements.
6.How does Aetrix verify that LP87524JRNFTQ1 is sourced from the original manufacturer or authorized distributors?
All LP87524JRNFTQ1 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 LP87524JRNFTQ1 meets industry standards.
7.What is the process for return or replacement of LP87524JRNFTQ1?
All LP87524JRNFTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87524JRNFTQ1, 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 LP87524JRNFTQ1 part is unused and in its original packaging.
Return procedure for LP87524JRNFTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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