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Texas Instruments LP875630RNFRQ1
- Part No.:
- LP875630RNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP875630RNFRQ1.pdf
- Description:
- IC REG BUCK ADJ 16A QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
LP875630RNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC configured as one 2-phase and two 1-phase DC/DC outputs, delivering up to 8 A total (4 A per phase max), with 0.6–3.36 V programmable output voltage, 2 MHz switching frequency, and I²C interface supporting up to 3.4 MHz. It powers processor cores and I/O rails in automotive infotainment and ADAS camera modules.
For engineers reviewing the LP875630RNFRQ1 datasheet, LP875630RNFRQ1 pinout, LP875630RNFRQ1 application, or LP875630RNFRQ1 equivalent, key selection criteria include multi-phase configuration flexibility, remote differential sensing for point-of-load accuracy, programmable slew rate (0.47–10 mV/µs), integrated current measurement, and automotive-grade thermal warning/shutdown thresholds.
Technical Context
The LP875630RNFRQ1 implements four synchronous buck converter cores dynamically reconfigurable into one 2-phase rail plus two independent 1-phase rails-enabling optimized power delivery to heterogeneous loads such as SoC cores, memory interfaces, and image sensors. Its AUTO mode enables automatic PWM-to-PFM transition and phase shedding/addition across 0.1–8 A load range.
It supports remote differential voltage sensing on each multiphase output (FB_B0/FB_B1 for BUCK0/BUCK1; FB_B2/FB_B3 for BUCK2/BUCK3), compensating for IR drop between regulator and load. The device integrates a PLL for clock synchronization, spread-spectrum modulation, and configurable GPIOs (EN1/EN2/EN3) usable for sequencing external regulators or reset control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | One 2-phase + two 1-phase buck outputs - enables independent voltage rails with shared or isolated inductor sets. |
| Max Output Current | 8 A total (4 A per phase max) - supports high-current processor domains while maintaining thermal margin at 125°C ambient. |
| Input Voltage Range | 2.8 V to 5.5 V - compatible with automotive battery-supplied 3.3 V/5 V intermediate rails and cold-crank conditions. |
| Output Voltage Range | 0.6 V to 3.36 V in 5–20 mV steps - covers DDR memory, GPU, CPU core, and peripheral I/O supply requirements. |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz) - enables compact 0.47 µH inductors and reduces EMI fundamental frequency above AM band. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - allows rapid register access for dynamic voltage scaling and fault response. |
| Thermal Protection | Die temperature warning at 115–147°C (configurable), shutdown at 140–160°C - ensures safe operation under sustained overload or airflow loss. |
Pinout & Package
VQFN-HR (RNF) 26-pin package, 4.50 mm × 4.00 mm body size, with exposed thermal pad for enhanced PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0, SW_B1 | Buck0/Buck1 switch nodes | Connect to respective 0.47 µH inductors; require low-ESR ceramic input/output capacitors and tight layout for EMI control. |
| FB_B0, FB_B1 | Positive feedback for Buck0/Buck1 | Remote sense inputs - routed directly to load for ±2% DC accuracy despite PCB trace resistance. |
| FB_B2, FB_B3 | Positive feedback for Buck2/Buck3 | Also serve as negative feedback for Buck0/Buck2 respectively - enable 2-phase interleaving with single-resistor divider per rail. |
| VIN_B0–VIN_B3 | Independent input power pins | Must be externally tied together and locally bypassed - prevents cross-regulator coupling during transient load events. |
| EN1 (GPIO1), EN2 (GPIO2), EN3 (GPIO3) | Configurable enable/GPIO | Support hardware sequencing of external LDOs or load switches; programmable as voltage-level selectors for dual-output modes. |
| SDA, SCL | I²C bidirectional data/clock | Support standard/fast/fast+/high-speed modes - require 10 kΩ pull-ups to VANA; tolerate 1.65–3.6 V logic levels. |
| PGOOD | Open-drain power-good indicator | Asserts after soft-start and voltage regulation; debounce delay configurable from 4 µs to 13 ms for noise immunity. |
| NRST | Active-low reset input | Resets internal registers and disables all outputs; includes 650–1700 kΩ internal pulldown for fail-safe startup. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable multi-phase topology | Runtime-selectable 2+1+1 output arrangement - eliminates need for multiple discrete regulators in space-constrained ADAS ECUs. |
| Programmable output slew rate | 0.47–10 mV/µs (7 settings) - minimizes in-rush current and output overshoot during voltage transitions or startup. |
| Integrated current measurement | 20 mA LSB, <10% error above 1 A - enables real-time load monitoring without external sense resistors or shunts. |
| Spread-spectrum & phase interleaving | Reduces peak EMI by >10 dB at fundamental switching frequency - simplifies compliance with CISPR 25 Class 5. |
| Automated phase management | Phase add/shed thresholds (e.g., 1 A → 2-phase, 0.7 A → 1-phase) - maintains >85% efficiency from 100 mA to full load. |
Applications
| Automotive Infotainment SoC Core Rail | ADAS Camera Sensor I/O Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-A76/A78 CPU clusters in head-unit systems requiring dynamic voltage scaling between 0.8 V and 1.2 V. IC Role / Device Role / Timing Role: Primary 2-phase buck regulator delivering up to 4 A with <±2% DC accuracy and <±40 mV transient deviation (0–4 A step). Use Value: Remote sensing and programmable slew rate prevent brownouts during burst-mode execution; I²C interface enables real-time DVFS coordination with SoC firmware. |
Use Scenario: Supplies 1.8 V I/O rail to MIPI CSI-2 image sensors in surround-view camera modules. IC Role / Device Role / Timing Role: One of two independent 1-phase buck converters, providing clean, low-noise 1.8 V at up to 2 A with <3 mVp-p ripple in PWM mode. Use Value: Dedicated 1-phase channel isolates sensor I/O noise from core rail; PGOOD signal synchronizes sensor initialization sequence with power stabilization. |
| Automotive Cluster Display Memory | Radar Processor Auxiliary Rail |
|
Use Scenario: Generates 1.1 V DDR4/LPDDR4 memory supply for digital instrument cluster displays. IC Role / Device Role / Timing Role: Second 1-phase buck output, supporting fast transient response (<10 µs settling) and ±3% load regulation over 0–2 A. Use Value: Configurable start-up delay and GPIO-controlled sequencing ensure memory power-up occurs only after SoC core is stable, preventing bus contention. |
Use Scenario: Delivers 3.3 V auxiliary supply to radar transceiver ASICs requiring precise voltage tracking and low EMI. IC Role / Device Role / Timing Role: Uses same 1-phase configuration with external clock sync (CLKIN) to align switching edges with radar RF timing windows. Use Value: Spread-spectrum mode and phase interleaving suppress conducted emissions near 77 GHz radar bands; thermal warning flag triggers derating before junction exceeds 125°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP875620RNFRQ1 | Configured as one 3-phase + one 1-phase output (12 A total); lacks independent 1-phase flexibility of LP875630RNFRQ1. | Better suited for single high-current domain (e.g., GPU) plus auxiliary rail; less optimal for three distinct low-power domains. | Select when primary load requires >4 A continuous current and secondary rail is low-duty-cycle. |
| LP875650RNFRQ1 | Two independent 2-phase outputs (8 A each); no 1-phase capability; higher pin count and larger layout footprint. | Designed for dual-core SoCs with mirrored power domains; cannot support asymmetric 2+1+1 topologies. | Choose for redundant or parallel processing architectures where identical rail configurations simplify design reuse. |
Compared with LP875620RNFRQ1 and LP875650RNFRQ1, the LP875630RNFRQ1 uniquely balances flexibility and integration for heterogeneous automotive subsystems-offering precisely one 2-phase rail for performance cores and two dedicated 1-phase rails for sensors and peripherals without over-provisioning or layout bloat.
Availability
LP875630RNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument cluster designs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LP875630RNFRQ1 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 automotive qualification expertise.
The LP8756x-Q1 product line was designed specifically for next-generation automotive processors-delivering high-efficiency, configurable multi-phase buck conversion with integrated telemetry, sequencing, and functional safety features for infotainment, radar, and vision systems.
FAQ
What is the exact multi-phase configuration supported by the LP875630RNFRQ1?
The LP875630RNFRQ1 is factory-configured as one 2-phase buck output (BUCK0 + BUCK1) and two independent 1-phase buck outputs (BUCK2 and BUCK3). This arrangement supports simultaneous delivery of up to 4 A on the 2-phase rail and 2 A each on the two 1-phase rails, with full I²C programmability of voltage, slew rate, and sequencing for each output. The LP875630RNFRQ1 does not support reconfiguration to other topologies like 4-phase or 3+1-phase.
Does the LP875630RNFRQ1 support remote differential voltage sensing on all outputs?
Yes, the LP875630RNFRQ1 supports true remote differential sensing on both its 2-phase and 1-phase outputs. For the 2-phase rail (BUCK0/BUCK1), FB_B0 and FB_B1 serve as positive sense inputs, while FB_B1 also functions as the negative sense for BUCK0. For BUCK2 and BUCK3, FB_B2 and FB_B3 act as positive sense inputs, with FB_B3 doubling as the negative sense for BUCK2. This architecture enables ±2% output accuracy at the point-of-load under varying PCB trace resistance.
What is the minimum output capacitance required per phase for stable operation of the LP875630RNFRQ1?
The LP875630RNFRQ1 requires a minimum of 10 µF ceramic output capacitance per phase (COUT ≥10 µF/phase), with typical designs using 22 µF/phase. Total output capacitance depends on configuration: 44 µF for the 2-phase rail and 22 µF each for the two 1-phase rails. The device specifies maximum total capacitance limits based on slew-rate setting (e.g., ≤500 µF for 1-phase output at 1.9 mV/µs) to maintain stability during voltage transitions.
How does the LP875630RNFRQ1 handle thermal protection, and what are the trip thresholds?
The LP875630RNFRQ1 provides two-tier thermal protection: die temperature warning (TDIE_WARN_LEVEL configurable to 115–147°C) and thermal shutdown (140–160°C). Warning asserts the nINT pin and sets status bits; shutdown disables all outputs and holds NRST low until junction cools below hysteresis (20°C). These thresholds meet AEC-Q100 Grade 1 requirements for operation from –40°C to +125°C ambient, with junction limited to 140°C continuous.
Can the LP875630RNFRQ1's EN1, EN2, and EN3 pins be used for both enable control and GPIO functionality?
Yes, EN1 (GPIO1), EN2 (GPIO2), and EN3 (GPIO3) are multifunction pins configurable via I²C registers. In enable mode, they independently control startup/shutdown of individual buck outputs. In GPIO mode, they support push-pull or open-drain outputs (with 10 kΩ external pull-up) and can be programmed as inputs with Schmitt-trigger hysteresis (10–200 mV). Each pin includes programmable debounce and interrupt generation, enabling use in system-level sequencing or status signaling alongside the LP875630RNFRQ1's primary regulation function.
LP875630RNFRQ1 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:
- 16A
- 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)
LP875630RNFRQ1 FAQ
1.How can I place an order for LP875630RNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP875630RNFRQ1 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 LP875630RNFRQ1 reliable?
The price and inventory of LP875630RNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP875630RNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP875630RNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP875630RNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP875630RNFRQ1?
LP875630RNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP875630RNFRQ1 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 LP875630RNFRQ1?
For technical support, including LP875630RNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP875630RNFRQ1 requirements.
6.How does Aetrix verify that LP875630RNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP875630RNFRQ1 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 LP875630RNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP875630RNFRQ1?
All LP875630RNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP875630RNFRQ1, 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 LP875630RNFRQ1 part is unused and in its original packaging.
Return procedure for LP875630RNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP875630RNFRQ1 Tags
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