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Texas Instruments LP875761ARNFTQ1
- Part No.:
- LP875761ARNFTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP875761ARNFTQ1.pdf
- Description:
- IC REG BUCK 1V 16A QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:435
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Product details
Overview
LP875761ARNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive four-phase synchronous buck converter delivering 16 A total output (4 A per phase) at 1.0 V with 3 MHz switching frequency, integrated high- and low-side FETs, and differential remote voltage sensing for point-of-load accuracy in infotainment and ADAS power rails.
For engineers reviewing the LP875761ARNFTQ1 datasheet, LP875761ARNFTQ1 pinout, LP875761ARNFTQ1 application, or LP875761ARNFTQ1 equivalent, key selection criteria include its 2.8–5.5 V input range, programmable current limits (1.5–5 A/phase), I²C interface supporting up to 3.4 MHz, spread-spectrum EMI reduction, and thermal warning/shutdown thresholds at 125 °C and 150 °C.
Technical Context
The LP875761ARNFTQ1 implements a forced-PWM, 4-phase interleaved architecture with 90° phase offset between channels, enabling effective ripple frequency of 12 MHz and reduced input/output current ripple. It uses current-mode control with PI compensation and supports external clock synchronization (1–24 MHz) to minimize system-level EMI coupling.
Its digital control core integrates load-current measurement via on-die ADC (20 mA LSB, <10% accuracy), programmable soft-start slew rate (3.23–4.4 mV/µs), and configurable GPIOs (EN1/EN2/EN3) that support both enable sequencing and push-pull/open-drain output modes for external regulator coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±10 mV DC accuracy over line/load/temp, including reference, regulation, and process variation. |
| Max Output Current | 16 A total (4 A per phase), limited by forward current limit (programmable 1.5–5 A/phase) and thermal shutdown at 150 °C junction. |
| Switching Frequency | 3 MHz ±10%, internally generated or synchronized to external clock (1–24 MHz); enables compact 0.33 µH inductors. |
| Input Voltage Range | 2.8 V to 5.5 V; includes undervoltage lockout (2.63 V rising) and overvoltage protection (5.8 V rising) on VANA and VIN_Bx. |
| I²C Interface Speed | Supports Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes with 1.65–3.6 V logic levels. |
| Thermal Protection | Configurable die temperature warning (125 °C typical) and shutdown (150 °C typical), both with 20 °C hysteresis. |
| Load Transient Response | ±18 mV deviation for 4–12 A load step (1 µs edge), enabled by 4-phase interleaving and 122 µF/phase POL capacitance. |
Pinout & Package
VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size, with exposed thermal pad (AGND-connected) for enhanced thermal dissipation (RθJB = 4.7 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch node (x4) | Connects to external inductor; each drives one phase; requires local high-frequency bypassing. |
| VIN_B0–VIN_B3 | Phase input supply (x4) | Must be externally tied together and locally bypassed; not internally connected. |
| FB_B0–FB_B3 | Differential feedback input (x4) | Positive sense for respective BUCKx; FB_B1/FB_B3 also serve as negative sense for adjacent phases. |
| EN1/EN2/EN3 | Programmable enable/GPIO (x3) | Configurable as regulator enable or GPIO1–GPIO3 with programmable direction and drive type. |
| SDA/SCL | I²C bidirectional data/clock | Supports 3.4 MHz HS mode; require external pullups to VIO (1.65–3.6 V). |
| nINT/PGOOD | Open-drain interrupt/power-good | nINT signals fault conditions; PGOOD asserts after deglitch (4–10 µs) when output is within ±14 mV of 1.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Four-phase interleaved architecture | Reduces input/output ripple amplitude by ~75% vs single-phase; enables smaller input capacitors (1.9–10 µF) and faster transient response. |
| Differential remote voltage sensing | Compensates for IR drop between regulator output and point-of-load, maintaining ±10 mV output accuracy at processor VDD pins. |
| Integrated current sensing | Eliminates need for external current-sense resistors; provides 20 mA LSB resolution and <10% accuracy for real-time load monitoring. |
| Programmable startup/shutdown sequencing | Enables precise timing control (µs resolution) across regulators and GPIOs to coordinate power-up of SoCs, memory, and peripherals. |
| Synchronized spread-spectrum mode | Reduces peak EMI by spreading switching energy across 3 MHz ±1.5%; compatible with external clock sync to avoid beat frequencies. |
Applications
| Automotive Infotainment | Cluster Display Power |
|---|---|
Use Scenario: Power delivery to high-performance SoCs (e.g., Qualcomm SA8155P) in head-unit systems requiring stable 1.0 V @ 12–16 A with fast transient response. IC Role / Device Role / Timing Role: Primary multiphase buck controller providing core voltage with differential sensing and I²C-configurable sequencing. Use Value: Enables compliance with CISPR-25 Class 5 radiated emissions via spread-spectrum and phase interleaving while maintaining <±18 mV load-step deviation. |
Use Scenario: Supplying instrument cluster microcontrollers and TFT-LCD drivers where space-constrained layout demands high power density and low thermal footprint. IC Role / Device Role / Timing Role: Single-chip 4-phase solution replacing discrete multi-regulator designs; thermal pad ensures RθJB = 4.7 °C/W for conduction-cooled PCBs. Use Value: Reduces board area by >40% vs dual 8-A converters and eliminates external current-sense resistors, lowering BOM count and thermal hotspots. |
| Radar Processing Unit | ADAS Camera Module |
Use Scenario: Powering 77-GHz radar MMICs and DSPs in front-end modules requiring ultra-low noise, tight voltage tolerance, and robust fault handling. IC Role / Device Role / Timing Role: Core voltage regulator with overvoltage/undervoltage lockout, thermal warning, and programmable PGOOD delay to meet ASIL-B functional safety requirements. Use Value: Guarantees safe shutdown before junction exceeds 150 °C and provides early warning at 125 °C for system-level thermal management. |
Use Scenario: Delivering clean 1.0 V to image signal processors (ISPs) and high-speed SerDes in surround-view camera ECUs operating in under-hood environments. IC Role / Device Role / Timing Role: Automotive-grade buck converter with AEC-Q100 Grade 1 qualification (–40°C to +125°C ambient) and HBM/CDM ESD protection. Use Value: Ensures reliable operation across extended temperature range and meets automotive ESD immunity requirements (HBM ±2 kV, CDM ±500 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65917-Q1 | Single-chip PMIC with 3 buck converters (max 3 A each), integrated LDOs, and battery charger; no 4-phase capability or 16-A output. | Targeted at lower-power infotainment SoCs (e.g., TI Jacinto 6); lacks required current capacity and phase interleaving for radar/ISP loads. | Select LP875761ARNFTQ1 when 16-A 1.0-V rail with <±18-mV transient deviation and differential sensing is mandatory. |
| MPQ8645PGU-AEC1 | 4-phase 16-A buck controller (no integrated FETs); requires external gate drivers and MOSFETs; supports 200–2000 kHz fSW. | Used in higher-voltage or thermally isolated designs where discrete FETs improve thermal partitioning; lacks integrated current sensing and I²C-based GPIO control. | Choose LP875761ARNFTQ1 for simplified layout, reduced component count, and embedded telemetry without external sense resistors. |
Compared with TPS65917-Q1 and MPQ8645PGU-AEC1, the LP875761ARNFTQ1 uniquely delivers fully integrated 4-phase 16-A conversion with on-die current measurement, differential remote sensing, and automotive-grade I²C configurability - eliminating external components while meeting stringent ADAS transient and EMI requirements.
Availability
LP875761ARNFTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, radar processing, and ADAS camera modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP875761ARNFTQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive power management ICs and functional safety-certified design methodologies.
The LP875761ARNFTQ1 belongs to TI's LP87xx-Q1 automotive power management portfolio, engineered specifically for high-current, low-voltage core rails in ADAS and infotainment SoCs where precision, reliability, and EMI control are critical.
FAQ
What is the maximum continuous output current supported by the LP875761ARNFTQ1?
The LP875761ARNFTQ1 delivers up to 16 A total output current in 4-phase configuration (4 A per phase), limited by internal forward current limit settings (programmable 1.5–5 A/phase) and thermal shutdown at 150 °C junction temperature. At 2.8–3.0 V input, max output is derated to 12 A due to reduced efficiency and increased conduction loss.
Does the LP875761ARNFTQ1 support external clock synchronization, and what frequency range is accepted?
Yes, the LP875761ARNFTQ1 supports external clock synchronization via the CLKIN pin, accepting nominal frequencies from 1 MHz to 24 MHz in 1-MHz steps. Clock detection includes 20-µs debounce and 600-µs transition delay; cycle-to-cycle PLL jitter is specified at 300 ps p-p.
How does the LP875761ARNFTQ1 implement load-current measurement without external sense resistors?
The LP875761ARNFTQ1 uses integrated high-side FET RDS(on) sensing combined with on-die ADC to measure output current. It achieves 20 mA LSB resolution and <10% accuracy across 0–20.47 A range, with measurement time of 4 µs in PWM mode - eliminating need for external shunt resistors and associated board space and power loss.
What protection features are built into the LP875761ARNFTQ1 for automotive reliability?
The LP875761ARNFTQ1 includes overtemperature warning (125 °C typical) and shutdown (150 °C typical), output short-circuit and overload protection, input overvoltage (5.8 V) and undervoltage lockout (2.63 V), output overvoltage (±50 mV) and undervoltage monitoring, and HBM ±2 kV / CDM ±500 V ESD rating per AEC-Q100.
Can the EN1, EN2, and EN3 pins of the LP875761ARNFTQ1 be used as general-purpose I/Os?
Yes - EN1, EN2, and EN3 are multifunction pins configurable as either regulator enable inputs or GPIO1–GPIO3 outputs. Their direction (input/output), drive type (push-pull or open-drain), and output level are programmable via I²C registers, enabling flexible sequencing control of external regulators, load switches, and processor reset signals.
LP875761ARNFTQ1 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:
- Fixed
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 16A
- Frequency - Switching:
- 3MHz
- 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)
LP875761ARNFTQ1 FAQ
1.How can I place an order for LP875761ARNFTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP875761ARNFTQ1 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 LP875761ARNFTQ1 reliable?
The price and inventory of LP875761ARNFTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP875761ARNFTQ1 is usually 5 days.
3.What payment methods are accepted for LP875761ARNFTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP875761ARNFTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP875761ARNFTQ1?
LP875761ARNFTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP875761ARNFTQ1 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 LP875761ARNFTQ1?
For technical support, including LP875761ARNFTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP875761ARNFTQ1 requirements.
6.How does Aetrix verify that LP875761ARNFTQ1 is sourced from the original manufacturer or authorized distributors?
All LP875761ARNFTQ1 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 LP875761ARNFTQ1 meets industry standards.
7.What is the process for return or replacement of LP875761ARNFTQ1?
All LP875761ARNFTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP875761ARNFTQ1, 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 LP875761ARNFTQ1 part is unused and in its original packaging.
Return procedure for LP875761ARNFTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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