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Texas Instruments LP87524BRNFRQ1
- Part No.:
- LP87524BRNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87524BRNFRQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,486
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Product details
Overview
LP87524BRNFRQ1 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 four independent 4-MHz synchronous step-down outputs (Buck0–Buck3), supports 2.8 V to 5.5 V input, programmable 0.6 V–3.36 V outputs, and achieves up to 10 A total output current with 3.8 mV/µs slew-rate control - deployed in AWR/IWR radar sensor modules.
For engineers reviewing the LP87524BRNFRQ1 datasheet, LP87524BRNFRQ1 pinout, LP87524BRNFRQ1 application, or LP87524BRNFRQ1 equivalent, key selection criteria include automotive-grade thermal robustness (−40°C to +125°C), I²C-configurable GPIOs and PGOOD timing, spread-spectrum EMI reduction, and remote voltage sensing for point-of-load accuracy in RF power rails.
Technical Context
The LP87524BRNFRQ1 integrates four independent buck regulator cores with integrated high-side/low-side FETs (RDS(ON) HS: 29–65 mΩ; LS: 17–35 mΩ), operating in auto PFM/PWM mode across 0.1–5 A load range. Each phase supports programmable soft-start, slew-rate limiting, and individual enable/control via EN1–EN3 (reconfigurable as GPIO1–GPIO3).
It features a fully programmable I²C interface (100 kHz–3.4 MHz), external clock synchronization (1–24 MHz), and comprehensive protection: overtemperature warning/shutdown (115–150°C), VANA OVP/UVLO, output short-circuit/overload detection, and ±2% DC output voltage accuracy in PWM mode - all validated for automotive infotainment and ADAS radar subsystems.
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 UVLO at 2.51–2.75 V and OVP at 5.6–6.1 V. |
| Output Voltage Range | 0.6 V to 3.36 V per channel - 10 mV/5 mV/20 mV step resolution enables precise rail tuning for RF, digital, and I/O domains. |
| Switching Frequency | 3.6–4.4 MHz (PWM mode, VOUT > 0.8 V) - enables compact 0.47 µH inductors and low-profile ceramic output capacitors. |
| Total Output Current | Up to 10 A combined - distributed across four phases (e.g., Buck0: 1.5 A, Buck1: 1.5 A, Buck2: 4 A, Buck3: 2.5 A in default AWR configuration). |
| Output Slew Rate | 3.23–4.4 mV/µs - limits inrush current and minimizes overshoot during startup/voltage transitions. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - enables fast register access for dynamic rail sequencing and real-time fault monitoring. |
| Thermal Rating | Ambient: −40°C to +125°C; Junction: up to +140°C - qualified per AEC-Q100 Grade 1 for under-hood radar module deployment. |
Pinout & Package
VQFN-HR (26-pin, 4.50 mm × 4.00 mm) package with exposed thermal pad; optimized for high-power density and thermal dissipation in automotive radar PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B0–FB_B3 | Output voltage feedback (positive) | Remote sensing inputs for closed-loop regulation - compensates IR drop between converter and point-of-load. |
| SW_B0–SW_B3 | Buck switch node | Direct connection to external inductor - requires low-inductance layout to minimize switching losses and EMI. |
| VIN_B0–VIN_B3, VANA | Power input pins | Separate VIN_Bx pins are not internally connected - must be externally tied and locally bypassed per phase. |
| EN1–EN3 | Programmable enable / GPIO | Configurable as buck enable signals or general-purpose I/O (push-pull/open-drain, direction programmable). |
| SDA, SCL, nINT, NRST | Digital interface & control | I²C bidirectional data/clock, open-drain interrupt, and active-low reset - support system-level sequencing and fault reporting. |
| PGOOD | Power-good status output | Programmable delay (4 µs–13 ms) and threshold (±8–64 mV) for synchronized rail validation in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Four-phase 4-MHz buck architecture | Enables <10 mm² solution size per rail using 0.47 µH inductors and 22 µF ceramic output caps - critical for space-constrained radar modules. |
| Spread-spectrum & phase interleaving | Reduces peak EMI by >10 dB and lowers input/output ripple - meets CISPR-25 Class 5 requirements for automotive radar emissions. |
| Remote voltage sensing (FB pins) | Maintains ±0.5% output accuracy at point-of-load despite PCB trace resistance - essential for sensitive RF MMIC bias stability. |
| Load-current measurement (no sense resistor) | Integrated current estimation with <10% error (IOUT > 1 A) and 20 mA resolution - eliminates external shunt, saving BOM cost and board area. |
| Configurable startup/shutdown sequencing | ENx/GPIO-controlled timing with programmable delays - ensures safe power-up order for radar SoC, LNA, and PLL subsystems. |
Applications
| Radar Sensor Power | Automotive Camera Module |
|---|---|
|
Use Scenario: Powering TI AWR2944/2243 radar SoCs and associated RF front-end MMICs in 77-GHz ADAS sensors. IC Role / Device Role / Timing Role: Quad-buck PMIC delivering isolated, sequenced, and slew-controlled rails for digital core (1.2 V), I/O (3.3 V), RF synthesizer (1.8 V), and LNA bias (2.3 V). Use Value: Eliminates need for discrete regulators and external sequencing logic - reduces bill-of-materials count by ≥7 components while meeting AEC-Q100 thermal and EMI requirements. |
Use Scenario: Supplying image signal processor (ISP), CMOS image sensor, and lens actuator in rear-view and surround-view camera systems. IC Role / Device Role / Timing Role: Single-chip power solution generating 1.1 V (core), 1.8 V (memory), 2.8 V (sensor analog), and 3.3 V (I/O) with independent enable control and PGOOD monitoring. Use Value: Enables compact 4-layer PCB design with <15 mm² footprint and <100 µs startup-to-stable timing - critical for thin camera housings. |
| Cluster Display Power | Infotainment Head Unit |
|
Use Scenario: Driving TFT-LCD display backlight drivers, GPU, and touch controller in digital instrument clusters. IC Role / Device Role / Timing Role: Four-rail source supporting 1.0 V GPU core, 1.2 V display interface, 3.3 V backlight control, and 5 V USB peripheral power (via external LDO). Use Value: Integrated thermal warning (115–135°C) and shutdown (140–160°C) prevent display blackouts during prolonged summer operation. |
Use Scenario: Powering application processor, audio codec, CAN transceiver, and USB hub in automotive head units. IC Role / Device Role / Timing Role: Configurable buck outputs deliver 1.0 V (AP core), 1.1 V (GPU), 1.8 V (DDR), and 3.3 V (peripherals) with I²C-based dynamic voltage scaling. Use Value: 3.4 MHz I²C interface allows real-time rail adjustment during multimedia workload changes - improving system efficiency by 8–12% vs fixed-voltage solutions. |
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 |
|---|---|---|---|
| LP87524J-Q1 | Same pinout and package; differs in factory-default output voltages (Buck2 = 1.0 V, Buck3 = 1.8 V) and max current per rail (Buck2: 4 A @ VIN ≥3 V). | Optimized for AWR/IWR radar with ferrite-filtered RF rails; lacks LP87524BRNFRQ1's 1.8 V/4 A Buck2 configuration for higher-efficiency RF power stages. | Select LP87524J-Q1 when targeting cost-sensitive radar designs requiring lower RF rail voltage and tighter EMI filtering. |
| LP87524P-Q1 | Same mechanical form factor; default outputs set to 1.0 V (Buck0), 1.2 V (Buck1), 1.0 V (Buck2), 1.8 V (Buck3); Buck0/Buck2 rated for 3 A each. | Targeted at compact radar modules needing dual 1.0 V rails (e.g., digital baseband + RF synthesizer); lower total current capacity than LP87524BRNFRQ1's 10 A aggregate. | Choose LP87524P-Q1 for space-constrained AWR1843-class modules where dual 1.0 V rails and 3 A per phase suffice. |
Compared with LP87524J-Q1 and LP87524P-Q1, the LP87524BRNFRQ1 provides the highest Buck2 current rating (4 A) and factory-configured 1.8 V/4 A RF rail - making it optimal for high-performance 77-GHz radar transceivers requiring minimal external filtering and maximum conversion efficiency at full load.
Availability
LP87524BRNFRQ1 is available at Aetrix Electronics and suitable for automotive radar, digital cluster, and camera power applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP87524BRNFRQ1 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 for automotive, industrial, and communications markets.
The LP87524BRNFRQ1 belongs to TI's automotive-qualified power management IC portfolio, engineered specifically for radar and vision systems requiring high-efficiency, low-noise, and thermally robust multi-rail power delivery.
FAQ
What is the maximum total output current supported by the LP87524BRNFRQ1?
The LP87524BRNFRQ1 supports up to 10 A total output current across its four buck converters. This is achieved with Buck0 and Buck1 rated at 1.5 A each, Buck2 at 4 A, and Buck3 at 2.5 A - verified under recommended operating conditions (TA = −40°C to +125°C, VIN = 2.8–5.5 V). The actual per-rail current depends on input voltage, thermal environment, and inductor selection.
Does the LP87524BRNFRQ1 support external clock synchronization?
Yes, the LP87524BRNFRQ1 supports external clock synchronization via the CLKIN pin. It accepts nominal input frequencies from 1 MHz to 24 MHz in 1-MHz steps, with ±30% tolerance. Clock detection includes 1.8 µs missing-clock delay and 600 µs internal-to-external clock change delay - enabling EMI reduction through frequency dithering or system-level clock alignment.
How does the LP87524BRNFRQ1 implement load-current measurement without external sense resistors?
The LP87524BRNFRQ1 uses integrated high-side FET RDS(ON) monitoring and internal current estimation algorithms to measure load current per phase. It offers 20 mA LSB resolution, <10% accuracy above 1 A, and measurement times of 45 µs (PFM) or 4 µs (PWM) - eliminating the need for external shunts while maintaining ±2% output voltage regulation.
What protection features are built into the LP87524BRNFRQ1?
The LP87524BRNFRQ1 includes overtemperature warning (115–135°C), thermal shutdown (140–160°C), VANA overvoltage (5.6–6.1 V) and undervoltage lockout (2.51–2.75 V), output overvoltage/undervoltage monitoring (±8–64 mV thresholds), and per-phase overload/short-circuit protection. All protections are hardware-based and operate independently of I²C communication.
Can the EN1–EN3 pins of the LP87524BRNFRQ1 be used as general-purpose I/Os?
Yes, EN1–EN3 on the LP87524BRNFRQ1 are multiplexed pins that can be configured as either buck enable signals or general-purpose I/Os (GPIO1–GPIO3). Their direction (input/output), drive type (push-pull or open-drain), and pull-up/down state are programmable via I²C registers - enabling flexible control of external regulators, reset lines, or status indicators in radar subsystems.
LP87524BRNFRQ1 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)
LP87524BRNFRQ1 FAQ
1.How can I place an order for LP87524BRNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87524BRNFRQ1 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 LP87524BRNFRQ1 reliable?
The price and inventory of LP87524BRNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87524BRNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP87524BRNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87524BRNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87524BRNFRQ1?
LP87524BRNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87524BRNFRQ1 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 LP87524BRNFRQ1?
For technical support, including LP87524BRNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87524BRNFRQ1 requirements.
6.How does Aetrix verify that LP87524BRNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP87524BRNFRQ1 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 LP87524BRNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP87524BRNFRQ1?
All LP87524BRNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87524BRNFRQ1, 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 LP87524BRNFRQ1 part is unused and in its original packaging.
Return procedure for LP87524BRNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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