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Texas Instruments LP87523JRNFRQ1
- Part No.:
- LP87523JRNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87523JRNFRQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,653
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Product details
Overview
LP87523JRNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four integrated MOSFETs, configured as one 2-phase and two 1-phase DC/DC outputs delivering up to 8 A total (4 A per 2-phase rail, 2 A per 1-phase rail), 2 MHz switching frequency, and I²C programmability for voltage, sequencing, and protection. It powers infotainment SoCs and camera sensor rails in vehicles.
For engineers reviewing the LP87523JRNFRQ1 datasheet, LP87523JRNFRQ1 pinout, LP87523JRNFRQ1 application, or LP87523JRNFRQ1 equivalent, key selection factors include its 2+1+1 phase configuration flexibility, remote differential sensing for ±2% output accuracy, programmable GPIO-controlled power sequencing, and automotive-grade thermal warning/shutdown at 125°C/150°C.
Technical Context
The LP87523JRNFRQ1 implements automatic PWM-to-PFM mode transition at 200 mA and PFM-to-PWM at 600 mA per rail, with phase adding (1→2→3→4 A thresholds) and shedding to maintain >80% efficiency from 1 mA to full load. Its four independent buck cores support configurable interleaving and synchronized clocking via internal PLL or external CLKIN (1–24 MHz).
It integrates high-side (29–65 mΩ) and low-side (17–35 mΩ) FETs per phase, supports load-current measurement without external sense resistors (20 mA LSB, <10% error), and provides programmable slew-rate control (0.47–10 mV/µs) to limit in-rush current during startup and voltage changes.
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 voltages for ADAS processors and image sensors |
| Max Output Current | 8 A total: 4 A on 2-phase rail + 2 A × 2 on 1-phase rails - enables single-chip power for multi-rail camera modules |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz) - allows use of compact 0.47 µH inductors and reduces EMI in sensitive RF bands |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - enables fast register writes for dynamic voltage scaling in real time |
| Thermal Protection | Warning at 115–147°C (configurable), shutdown at 140–160°C - ensures safe operation under sustained high ambient conditions |
| PGOOD Accuracy | ±40 mV window (e.g., ±4% at 1 V) - provides reliable system-level power-good assertion for processor reset timing |
Pinout & Package
VQFN-HR (RNF) 26-pin package, 4.5 mm × 4.0 mm body, 0.4 mm pitch, with exposed thermal pad for enhanced heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch node (x4) | Connects to external inductor; requires low-inductance layout to minimize switching losses and EMI |
| FB_B0–FB_B3 | Output voltage feedback (x4) | Differential sensing inputs - FB_Bx (positive) and alternate ground-sense function enable precise POL regulation |
| VIN_B0–VIN_B3 | Per-buck input supply (x4) | Must be externally tied together and locally bypassed - prevents cross-regulator coupling and improves transient response |
| EN1/EN2/EN3 | Configurable enable/GPIO (x3) | Control individual buck rails or sequence external regulators/loads; support dual-voltage selection per rail |
| SDA/SCL | I²C bidirectional data/clock | Support standard/fast/fast+/high-speed modes - enables firmware-driven dynamic power management |
| PGOOD | Open-drain power-good indicator | Asserts after soft-start and voltage stabilization; debounce configurable from 4 µs to 13 ms |
| nINT | Open-drain interrupt output | Signals fault events (OVP, UVLO, thermal, overcurrent); maskable per interrupt source via registers |
Key Features
| Feature | Design Value |
|---|---|
| Configurable multi-phase topology | One 2-phase + two 1-phase outputs - matches asymmetric SoC rail requirements without external phase controllers |
| Remote differential voltage sensing | Compensates for PCB IR drop between regulator and load - maintains ±2% output accuracy at point-of-load |
| Programmable power sequencing | Start-up/shutdown delays and GPIO-coordinated timing - eliminates need for external sequencer in camera modules |
| Integrated current measurement | 20 mA resolution, <10% error, no external sense resistor - enables real-time load monitoring and diagnostics |
| Spread-spectrum & phase interleaving | Reduces peak EMI amplitude by >10 dB - simplifies compliance with CISPR-25 Class 5 automotive emissions limits |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC Core |
|---|---|
|
Use Scenario: Dual-sensor front-facing camera with ISP, MIPI CSI-2 interface, and embedded vision processor. IC Role / Device Role / Timing Role: Primary power manager delivering 1.1 V @ 3 A (2-phase) to vision processor core and 1.8 V @ 1.2 A × 2 (1-phase × 2) to image sensors and I/O. Use Value: Single-chip solution eliminates discrete PMIC + sequencer, reduces BOM count by 7 parts, and meets ISO 26262 ASIL-B functional safety requirements via PGOOD and interrupt reporting. |
Use Scenario: In-dash head unit with quad-core application processor, GPU, DDR memory, and audio codec. IC Role / Device Role / Timing Role: Supplies 0.85 V @ 4 A (2-phase) to CPU/GPU, 1.1 V @ 2 A (1-phase) to DDR I/O, and 3.3 V @ 2 A (1-phase) to audio subsystem. Use Value: Configurable phase assignment avoids undersized rails; I²C-based dynamic voltage scaling reduces active power by 18% during UI idle states. |
| Radar Sensor Front-End Power | Digital Cluster Display Supply |
|
Use Scenario: 77 GHz radar transceiver with RF SoC, ADC/DAC, and FPGA logic. IC Role / Device Role / Timing Role: Generates clean 1.0 V @ 4 A (2-phase) for RF core, 1.8 V @ 2 A (1-phase) for analog front-end, and 3.3 V @ 2 A (1-phase) for digital interface. Use Value: Low-noise 2 MHz operation minimizes switching artifacts in RF receive band; PFM mode extends sleep-mode battery life to >14 days. |
Use Scenario: TFT-LCD instrument cluster with microcontroller, graphics engine, and backlight driver. IC Role / Device Role / Timing Role: Provides 1.2 V @ 4 A (2-phase) to MCU core, 1.8 V @ 2 A (1-phase) to display controller, and 5 V @ 2 A (1-phase) via external LDO for backlight. Use Value: Programmable soft-start slew rate (0.47–10 mV/µs) prevents LCD panel flicker during ignition-on power-up sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87522JRNFRQ1 | One 3-phase + one 1-phase output (9 A + 4 A max), no 2+1+1 configuration | Better suited for SoCs requiring three tightly coupled rails (e.g., CPU + GPU + cache), less optimal for camera dual-sensor asymmetry | Select when primary load demands >4 A on a single rail and phase balancing across three phases is critical |
| LP87524JRNFRQ1 | Four independent 1-phase outputs (4 × 4 A), no multi-phase current sharing | Lacks interleaving benefits - higher output ripple and reduced efficiency above 2 A per rail vs. 2-phase operation | Choose for designs needing fully isolated, independently controlled rails (e.g., mixed-signal test equipment), not automotive SoC power |
Compared with LP87522JRNFRQ1 and LP87524JRNFRQ1, the LP87523JRNFRQ1 uniquely balances high-current capability (4 A) on one rail with independent low-current (2 A) rails-enabling optimal efficiency and layout simplicity for camera and radar modules where rail current profiles are inherently asymmetric.
Availability
LP87523JRNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera, and radar power applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP87523JRNFRQ1 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 decades of AEC-Q100 qualification expertise.
The LP8752x-Q1 product line was designed specifically for automotive domain controllers and sensor fusion systems, integrating high-efficiency multi-phase conversion, robust fault handling, and I²C configurability to replace discrete power solutions in safety-critical ADAS platforms.
FAQ
What is the maximum output current configuration supported by the LP87523JRNFRQ1?
The LP87523JRNFRQ1 supports one 2-phase output delivering up to 4 A and two independent 1-phase outputs each delivering up to 2 A, for a total of 8 A. This configuration is fixed per device variant and cannot be reconfigured as 4-phase or 3+1-phase - only LP87521-Q1 and LP87522-Q1 support those topologies. The LP87523JRNFRQ1's 2+1+1 structure is optimized for asymmetric loads like camera sensor + ISP combinations.
Does the LP87523JRNFRQ1 support external clock synchronization?
Yes, the LP87523JRNFRQ1 accepts an external clock signal on the CLKIN pin (Pin 3) within 1–24 MHz, enabling synchronization to system master clocks to reduce beat-frequency EMI. When enabled, the internal PLL locks to the external reference with ±30% frequency tolerance and 300 ps peak-to-peak jitter. The LP87523JRNFRQ1 automatically detects clock loss within 1.8 µs and reverts to internal RC oscillator operation.
How does the LP87523JRNFRQ1 handle thermal protection in automotive environments?
The LP87523JRNFRQ1 features dual-level thermal management: a programmable die temperature warning (115–147°C) triggers an interrupt via nINT, while hard thermal shutdown activates at 140–160°C. Both thresholds include 20°C hysteresis to prevent oscillation. These functions operate independently of I²C communication, ensuring fail-safe behavior even during firmware hangs - a requirement for AEC-Q100 Grade 1 compliance.
Can the LP87523JRNFRQ1 measure load current without external sense resistors?
Yes, the LP87523JRNFRQ1 integrates on-die current sensing with 20 mA LSB resolution and <10% accuracy above 1 A. It measures per-phase current using high-side FET RDS(on) and delta-V detection, eliminating the need for external sense resistors and associated board space and power loss. Measurement occurs in <45 µs in PFM mode and 4 µs in PWM mode, supporting real-time telemetry in diagnostic firmware.
What packaging and thermal performance does the LP87523JRNFRQ1 offer?
The LP87523JRNFRQ1 uses a 26-pin VQFN-HR (RNF) package measuring 4.5 mm × 4.0 mm with 0.4 mm pitch and an exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 4.7°C/W, enabling >3 W continuous power dissipation with standard 2-layer automotive PCBs. The package is qualified to AEC-Q100 and rated for –40°C to +125°C ambient operation.
LP87523JRNFRQ1 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, 8A
- 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)
LP87523JRNFRQ1 FAQ
1.How can I place an order for LP87523JRNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87523JRNFRQ1 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 LP87523JRNFRQ1 reliable?
The price and inventory of LP87523JRNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87523JRNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP87523JRNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87523JRNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87523JRNFRQ1?
LP87523JRNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87523JRNFRQ1 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 LP87523JRNFRQ1?
For technical support, including LP87523JRNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87523JRNFRQ1 requirements.
6.How does Aetrix verify that LP87523JRNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP87523JRNFRQ1 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 LP87523JRNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP87523JRNFRQ1?
All LP87523JRNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87523JRNFRQ1, 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 LP87523JRNFRQ1 part is unused and in its original packaging.
Return procedure for LP87523JRNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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