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Texas Instruments LP875630RNFTQ1
- Part No.:
- LP875630RNFTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP875630RNFTQ1.pdf
- Description:
- IC REG BUCK ADJ 16A QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:193
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Product details
Overview
LP875630RNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four integrated MOSFETs, configurable as one 2-phase and two 1-phase outputs (total 16-A capability), 2-MHz switching frequency, 0.6–3.36-V programmable output voltage, and I²C interface supporting up to 3.4-MHz high-speed mode.
For engineers reviewing the LP875630RNFTQ1 datasheet, LP875630RNFTQ1 pinout, LP875630RNFTQ1 application, or LP875630RNFTQ1 equivalent, this device supports multiphase load-current measurement without external sense resistors, remote differential voltage sensing for point-of-load accuracy, and programmable slew-rate control (0.47–10 mV/µs) to manage in-rush current during startup and voltage transitions.
Technical Context
The LP875630RNFTQ1 implements automatic PWM-to-PFM mode transition and dynamic phase adding/shedding (e.g., 1→2→3→4 phases) to maximize efficiency across 0.1–16-A output current range. Its four synchronous buck cores share a common VANA supply and support independent enable signals (EN1–EN3) and GPIO reconfiguration.
It integrates a PLL-based clock generator with external clock synchronization (1–24 MHz input), spread-spectrum modulation, and phase interleaving to reduce EMI. Protection includes overtemperature warning (115–147°C), thermal shutdown (140–160°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 transient tolerance. |
| Output Configuration | One 2-phase + two 1-phase rails - enables flexible power sequencing for SoC + auxiliary rails (e.g., core + I/O + camera sensor). |
| Max Output Current | 16 A total (4 A per phase) - delivers high-density power with integrated 29-mΩ HS / 17-mΩ LS FETs per channel. |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz) - allows use of compact 0.47-µH inductors and reduces solution footprint. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - enables fast register access for dynamic voltage scaling and real-time telemetry. |
| Output Voltage Accuracy | ±2% (≥1 V) or ±20 mV (<1 V) in PWM mode - ensures stable core voltage regulation under line/load transients. |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +125°C ambient) - qualified for infotainment, ADAS, and digital cluster environments. |
Pinout & Package
LP875630RNFTQ1 is housed in a 26-pin VQFN-HR (RNF) package, 4.5 mm × 4.0 mm, with exposed thermal pad. Pin functions are validated per TI SNVSB22 datasheet Rev. March 2018.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch nodes | Direct connection points to external inductors; each drives one phase of the 4-phase architecture. |
| FB_B0–FB_B3 | Output voltage feedback inputs | Support remote differential sensing; FB_B1/FB_B3 double as negative feedback for adjacent rails. |
| VIN_B0–VIN_B3 | Per-phase input power pins | Must be externally tied together and locally bypassed - prevents internal coupling and improves noise immunity. |
| EN1 (GPIO1), EN2 (GPIO2), EN3 (GPIO3) | Configurable enable/GPIO terminals | Control individual rail enable/disable or sequence external regulators/loads via programmable logic states. |
| SDA / SCL | I²C bidirectional data/clock | Support standard/fast/fast+/high-speed modes; require external pull-ups to VIO (1.65–3.6 V). |
| PGOOD | Open-drain power-good indicator | Asserts after soft-start and voltage monitoring debounce (4 µs to 13 ms); masks during voltage changes. |
| NRST | Active-low reset input | Resets internal registers and disables all outputs; includes 650–1700-kΩ internal pulldown. |
| nINT | Open-drain interrupt output | Signals fault conditions (OCP, OTP, UVLO, PGOOD failure); requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable multiphase topology | Supports five DC/DC configurations (e.g., 2+1+1) via I²C register settings - eliminates need for multiple BOMs across vehicle platforms. |
| Programmable output slew rate | 0.47–10 mV/µs (7 settings) - minimizes output overshoot and in-rush current during startup/voltage scaling. |
| Integrated current measurement | 20.47-A full-scale range with <10% error (IOUT > 1 A) - replaces external current-sense resistors and associated layout area. |
| Remote differential voltage sensing | Compensates for IR drop between regulator output and point-of-load - maintains ±0.5% output accuracy at the SoC VDD pin. |
| Phase-interleaved switching | Reduces input/output ripple by up to 50% vs. non-interleaved operation - lowers required bulk capacitance and EMI filtering. |
Applications
| Automotive Digital Cluster | ADAS Radar Processor Power |
|---|---|
|
Use Scenario: Powers application processor, GPU, and display controller in instrument clusters requiring tight voltage regulation and fast transient response. IC Role / Device Role / Timing Role: Primary multi-rail PMIC delivering 1.1-V core, 1.8-V I/O, and 3.3-V interface rails with synchronized startup and independent enable control. Use Value: Enables single-chip power solution with <±2% output accuracy and <±40-mV load-step deviation - meets ASIL-B functional safety timing margins. |
Use Scenario: Supplies radar SoC (e.g., TI AWR2944) with low-noise, high-efficiency power across core, memory, and analog subsystems. IC Role / Device Role / Timing Role: Configured as 2-phase core rail (1.0 V @ 12 A) + dual 1-phase rails (1.8 V, 3.3 V) with phase interleaving to suppress switching noise near RF bands. Use Value: Achieves >90% efficiency at 8-A load with 2-MHz operation - avoids interference with 77-GHz radar signal integrity. |
| Automotive Infotainment Head Unit | Rear Camera Module Power |
|
Use Scenario: Delivers regulated power to multimedia SoC, audio codec, and USB-C PD controller in centralized head units. IC Role / Device Role / Timing Role: Manages three independent rails with programmable start-up delays and GPIO-controlled sequencing of external LDOs and load switches. Use Value: Supports dynamic voltage/frequency scaling (DVFS) via I²C commands - reduces average system power by up to 22% during low-activity states. |
Use Scenario: Powers image sensor, ISP, and serializer in automotive rear-view cameras operating in harsh thermal environments. IC Role / Device Role / Timing Role: Provides 1.2-V core (2-phase), 2.8-V analog (1-phase), and 1.8-V I/O (1-phase) with thermal warning (115°C) and shutdown (140°C) protection. Use Value: Maintains stable output under –40°C to +105°C junction temperature - eliminates cold-start failures and thermal derating in sealed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP875620RNFTQ1 | One 3-phase + one 1-phase configuration (12-A max); lacks second independent 1-phase rail. | Suitable for SoC + single auxiliary rail only; cannot support dual independent peripherals (e.g., camera + audio). | Select when system requires lower total current and simpler rail count - reduces software complexity and BOM cost. |
| LP875650RNFTQ1 | Two independent 2-phase rails (8-A each); no 1-phase flexibility; higher per-rail current capability. | Optimized for dual-core processors or redundant power domains; does not support mixed-phase topologies like 2+1+1. | Choose for symmetric dual-load systems where phase balancing and cross-regulator synchronization are critical. |
Compared with LP875630RNFTQ1, LP875620RNFTQ1 offers reduced rail count and lower peak current but sacrifices configurability for heterogeneous loads, while LP875650RNFTQ1 provides superior per-rail current handling and symmetry at the expense of granularity in powering discrete peripherals.
Availability
LP875630RNFTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS radar, and digital cluster applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP875630RNFTQ1 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 LP8756x-Q1 product line was designed specifically for next-generation automotive processors, delivering high-efficiency, configurable multiphase power with integrated telemetry and robust fault protection for safety-critical domains.
FAQ
What is the maximum output current supported by LP875630RNFTQ1 in its default 2+1+1 configuration?
LP875630RNFTQ1 supports up to 16 A total output current: 8 A on the 2-phase rail (4 A per phase) and 4 A each on the two 1-phase rails. At VIN ≥3 V, the 2-phase rail delivers 8 A; below 3 V, it derates to 6 A. The 1-phase rails each deliver 4 A (≥3 V) or 3 A (<3 V), verified per SNVSB22 Section 7.5.
Does LP875630RNFTQ1 support external clock synchronization, and what frequency range is acceptable?
Yes, LP875630RNFTQ1 accepts an external clock via CLKIN pin across 1–24 MHz with ±30% accuracy tolerance. The device synchronizes its internal 2-MHz PWM clock to the external source with ≤600-µs latency after valid detection, enabling EMI reduction in noise-sensitive automotive modules.
How does LP875630RNFTQ1 implement load-current measurement without external sense resistors?
LP875630RNFTQ1 measures per-phase current using integrated high-side FET RDS(on) sensing (29 mΩ typ.) and internal ADCs. It achieves 20-mA LSB resolution and <10% accuracy above 1 A, eliminating external shunts while maintaining ±0.5% output regulation via closed-loop compensation.
What protection features are built into LP875630RNFTQ1 for automotive reliability?
LP875630RNFTQ1 includes overtemperature warning (115–147°C), thermal shutdown (140–160°C), VANA overvoltage (5.6–6.1 V) and undervoltage lockout (2.51–2.75 V), per-phase forward/negative current limiting, output short-circuit protection, and programmable PGOOD monitoring with adjustable debounce.
Can LP875630RNFTQ1 be configured for single-rail operation, and how is phase shedding managed?
Yes, LP875630RNFTQ1 supports four independent 1-phase outputs. Phase shedding is fully automatic: at 0.7 A, it drops from 2-phase to 1-phase; at 1.5 A, from 3-phase to 2-phase; and at 2.4 A, from 4-phase to 3-phase - all governed by I²C-configurable thresholds per SNVSB22 Section 7.5.
LP875630RNFTQ1 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)
LP875630RNFTQ1 FAQ
1.How can I place an order for LP875630RNFTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP875630RNFTQ1 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 LP875630RNFTQ1 reliable?
The price and inventory of LP875630RNFTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP875630RNFTQ1 is usually 5 days.
3.What payment methods are accepted for LP875630RNFTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP875630RNFTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP875630RNFTQ1?
LP875630RNFTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP875630RNFTQ1 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 LP875630RNFTQ1?
For technical support, including LP875630RNFTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP875630RNFTQ1 requirements.
6.How does Aetrix verify that LP875630RNFTQ1 is sourced from the original manufacturer or authorized distributors?
All LP875630RNFTQ1 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 LP875630RNFTQ1 meets industry standards.
7.What is the process for return or replacement of LP875630RNFTQ1?
All LP875630RNFTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP875630RNFTQ1, 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 LP875630RNFTQ1 part is unused and in its original packaging.
Return procedure for LP875630RNFTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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