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Texas Instruments LM76005QRNPRQ1
- Part No.:
- LM76005QRNPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 30-WFQFN Exposed Pad
- Datasheet:
-
LM76005QRNPRQ1.pdf
- Description:
- IC REG BUCK ADJ 5A 30WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,112
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Product details
Overview
LM76005QRNPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC-DC converter delivering up to 5 A output current with input voltage range 3.5 V to 60 V, 15 µA quiescent current in regulation, and peak efficiency of 95% at 12 VIN/5 VOUT/2 A. It serves as primary power supply for ADAS camera modules and infotainment head units requiring robust transient tolerance (65 V surge) and low EMI.
For engineers reviewing the LM76005QRNPRQ1 datasheet, LM76005QRNPRQ1 pinout, LM76005QRNPRQ1 application, or LM76005QRNPRQ1 equivalent, key selection considerations include its pin-selectable FPWM mode, adjustable 200–500 kHz switching frequency, pre-biased startup capability, thermal shutdown with 150 °C trip point, and WQFN-30 wettable flanks package optimized for automotive thermal and EMI performance.
Technical Context
The LM76005QRNPRQ1 uses fixed-frequency peak-current-mode control with internal compensation, enabling stable regulation across wide VIN/VOUT combinations without external loop components. It supports seamless transition between CCM, DCM, and PFM modes, with automatic frequency foldback when minimum on-time (65 ns) or off-time (95 ns) limits are reached.
Its functional safety capability includes documentation support for ISO 26262 ASIL-B system integration, while protection features-cycle-by-cycle current limit (HS: 6.0–7.8 A, LS: 4.5–5.8 A), hiccup short-circuit response (46 ms retry delay), and input UVLO-enable reliable operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - Supports 12 V and 24 V automotive battery systems with 65 V transient tolerance for load dump immunity. |
| Output Current | Up to 5 A - Delivers full rated current continuously at TJ ≤ 125 °C with proper PCB thermal design (RθJB = 9.1 °C/W). |
| Quiescent Current | 15 µA in regulation - Enables always-on subsystems (e.g., body control modules) to meet <100 µA system sleep budget. |
| Switching Frequency | 200–500 kHz adjustable via RT resistor - Balances solution size (higher fSW) vs. efficiency (lower fSW); supports external sync to avoid EMI band interference. |
| Feedback Reference | 1.006 V ±1.1% - Enables precise output voltage setting (e.g., 3.3 V ±1.5%) using standard 1% resistors without trimming. |
| Thermal Shutdown | 150 °C trip / 135 °C recovery - Hysteresis prevents thermal oscillation during sustained overload in under-hood environments. |
| Efficiency | 95% @ 12 VIN/5 VOUT/2 A, 400 kHz - Achieved via low RDS(on) HS (95–150 mΩ) and LS (45–85 mΩ) MOSFETs plus optional BIAS rail support. |
Pinout & Package
The LM76005QRNPRQ1 is housed in a 6.00 mm × 4.00 mm WQFN-30 package with wettable flanks for automated optical inspection and enhanced thermal dissipation via exposed DAP connected to AGND/PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–5, 21–22, 24–26 | SW | High-side/low-side switch node - Connects to inductor and bootstrap capacitor; carries high di/dt; requires tight layout to minimize EMI. |
| 6 | BOOT | Bootstrap capacitor connection - Requires 470 nF ceramic cap to SW; enables high-side gate drive above PVIN. |
| 7, 19, 23, 27–30 | NC | No-connect - Pins 19/27/28/29/30 must be grounded for thermal relief; pins 7/23 left floating to maximize HV isolation. |
| 8 | VCC | Internal LDO output - Powers control circuitry; requires 2.2 µF bypass to AGND; not for external loading. |
| 9 | BIAS | Optional efficiency boost input - Tie to VOUT (3.3–18 V) or external 3.3/5 V rail; adds 1 µF bypass; improves light-load PFM efficiency. |
| 10 | RT | Frequency set - Resistor to AGND sets fSW from 200–500 kHz; open = 400 kHz default. |
| 11 | SS/TRK | Soft-start & tracking - Internal 6.3 ms ramp (floating); external cap extends time; connect to reference for output voltage tracking. |
| 12 | FB | Feedback input - Senses resistor divider ratio; 1.006 V reference enables 1 V to 95% VIN output range. |
| 16 | PGOOD | Open-drain power-good flag - Active-high when VOUT within ±5% of target; requires pull-up; asserts low on EN=low or fault. |
| 17 | SYNC/MODE | Sync input & mode select - Ground = auto PFM/DCM; logic high = forced PWM; external clock = sync + FPWM. |
| 18 | EN | Precision enable - Adjustable UVLO via resistor divider; 1.204 V typical turn-on threshold; 150 mV hysteresis. |
| 13–15 | AGND | Analog ground - Reference for FB, RT, SS/TRK, PGOOD; separate from PGND to reduce noise coupling. |
| 20 | PVIN | Main power input - Connects to input capacitors and internal bias LDO; high-current path requiring short, wide traces. |
| 24–26 | PGND | Power ground - Source of low-side FET; connects to CIN/COUT grounds and DAP; critical for thermal and EMI performance. |
| EP (DAP) | DAP | Exposed thermal pad - Must be soldered to solid ground plane with ≥6 thermal vias; primary heat dissipation path (RθJC(bot) = 1.0 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to +125 °C ambient operation - Meets automotive reliability and stress test requirements for front-end electronics. |
| Pin-selectable FPWM mode | Eliminates audible noise and output voltage ripple variation at light loads - Enabled by tying SYNC/MODE high instead of grounding. |
| Pre-biased output startup | Allows safe power-up into existing VOUT voltage - Prevents reverse current flow into powered downstream circuits during hot-plug or brownout recovery. |
| Wettable flanks WQFN-30 | Enables AOI-compatible solder joint inspection - Reduces field failure risk in high-volume automotive manufacturing. |
| Integrated current sensing | Eliminates external sense resistor - Uses internal HS FET RDS(on) for cycle-by-cycle current limiting, reducing BOM count and board space. |
Applications
| ADAS Camera Module Power | Infotainment Head Unit Core Rail |
|---|---|
Use Scenario: Powers image sensor, ISP, and interface logic in forward-facing ADAS cameras operating from 12 V battery with load dump transients. IC Role / Device Role / Timing Role: Primary 3.3 V/5 A buck regulator supplying core logic voltage; handles 65 V input surges without external TVS. Use Value: 95% efficiency at 2 A reduces thermal load in sealed camera housing; FPWM mode eliminates EMI-sensitive video timing jitter. | Use Scenario: Generates 5 V rail for MCU, display controller, and audio codec in automotive infotainment systems with 24 V battery architecture. IC Role / Device Role / Timing Role: Main system power converter synchronized to audio clock domain to avoid beat frequencies in analog audio paths. Use Value: External clock sync (200–500 kHz) avoids CISPR-25 radiated emissions peaks; wettable flanks ensure solder joint reliability over 15-year vehicle life. |
| HEV/EV Battery Management Interface | Automotive Gateway Microcontroller Supply |
Use Scenario: Supplies isolated CAN transceivers and microcontrollers in high-voltage battery management systems interfacing with 12 V auxiliary network. IC Role / Device Role / Timing Role: Robust 3.3 V/5 A supply tolerant to 60 V nominal input and 65 V transients during regenerative braking events. Use Value: Input transient protection up to 65 V eliminates need for external clamping diodes; thermal shutdown prevents latch-up during under-hood temperature excursions. | Use Scenario: Provides always-on 3.3 V supply for gateway MCU in vehicle communication networks requiring <100 µA sleep current. IC Role / Device Role / Timing Role: Low-quiescent-current buck converter maintaining regulation during vehicle park mode with 15 µA IQ. Use Value: 15 µA quiescent current enables multi-week battery hold-up without drain; precision enable supports programmable wake-up thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM76002QRNPRQ1 | 2.5 A output current, identical pinout and feature set - shares same WQFN-30 footprint and control interface. | Lower current rating suits lower-power domains (e.g., sensor hubs) where 5 A headroom is unnecessary. | Select when system load is ≤2.5 A and PCB reuse with LM76005QRNPRQ1 is required. |
| LM76003QRNPRQ1 | 3.5 A output current, identical pinout and feature set - shares same WQFN-30 footprint and control interface. | Mid-range current capacity balances cost and performance for cluster displays and telematics control units. | Select when system load is 2.5–3.5 A and thermal margin is constrained relative to LM76005QRNPRQ1. |
Compared with LM76002QRNPRQ1 and LM76003QRNPRQ1, the LM76005QRNPRQ1 provides highest output current (5 A) in the pin-compatible family, enabling single-supply scalability across ADAS, infotainment, and gateway platforms without redesigning power stage layout.
Availability
LM76005QRNPRQ1 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and HEV/EV battery interface systems requiring stable component supply across extended vehicle production lifecycles.
Supply support for LM76005QRNPRQ1 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.
The LM76005QRNPRQ1 belongs to TI's automotive-grade DC-DC converter product line, designed specifically for demanding automotive subsystems requiring AEC-Q100 qualification, functional safety support, and robust transient handling.
FAQ
What is the maximum input voltage the LM76005QRNPRQ1 can withstand without damage?
The LM76005QRNPRQ1 has an absolute maximum input voltage rating of 65 V on the PVIN pin, allowing it to survive automotive load dump transients without external protection components. Its recommended operating input range is 3.5 V to 60 V, and the device incorporates internal input transient protection circuitry validated per ISO 7637-2 Pulse 5a requirements. This 65 V tolerance directly enables simplified front-end design in 12 V and 24 V battery systems.
Does the LM76005QRNPRQ1 support synchronization to an external clock signal?
Yes, the LM76005QRNPRQ1 supports external clock synchronization via the SYNC/MODE pin, accepting input clocks from 200 kHz to 500 kHz. When driven by an external source, the device operates in forced PWM mode with constant frequency and phase alignment to the external clock, eliminating beat frequencies that cause EMI in sensitive applications like ADAS camera video links. The LM76005QRNPRQ1 triggers on the rising edge of the sync signal and maintains lock across temperature and voltage variations.
How does the LM76005QRNPRQ1 achieve 15 µA quiescent current in regulation?
LM76005QRNPRQ1 achieves 15 µA quiescent current in regulation through integrated low-power bias circuitry, optimized gate drivers, and intelligent gate charge recycling during light-load PFM operation. This ultra-low IQ is measured at the PVIN pin under no-load conditions with EN high, VOUT regulated, and BIAS pin tied to VOUT. The value reflects total device consumption including control logic, reference, and gate drive - enabling compliance with automotive "always-on" subsystem sleep current budgets below 100 µA.
Can the LM76005QRNPRQ1 start up when the output voltage is already present (pre-biased)?
Yes, the LM76005QRNPRQ1 supports pre-biased output startup, allowing safe power-up into an existing VOUT voltage without injecting reverse current into downstream circuits. During pre-bias start-up, the device monitors the FB pin and delays high-side FET activation until the output voltage decays below the regulation threshold, then ramps up output smoothly. This capability is essential for hot-swap applications, redundant power systems, and systems recovering from brownout events where downstream rails remain partially charged.
What thermal performance can be expected from the LM76005QRNPRQ1 in a standard 4-layer PCB layout?
In a standard 4-layer automotive PCB with 2 oz copper, 6 thermal vias under the DAP, and 200 mm² ground copper area, the LM76005QRNPRQ1 achieves a junction-to-board thermal resistance (RθJB) of 9.1 °C/W. At 5 A load and 12 VIN/5 VOUT, power dissipation is ~1.25 W, resulting in ~11.4 °C junction-to-board temperature rise above ambient. Combined with its 125 °C max operating junction temperature, this allows full 5 A operation up to +113.6 °C ambient - meeting Grade 1 automotive requirements with margin.
LM76005QRNPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 30-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 57V
- Current - Output:
- 5A
- Frequency - Switching:
- 200kHz ~ 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 30-WQFN (6x4)
LM76005QRNPRQ1 FAQ
1.How can I place an order for LM76005QRNPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM76005QRNPRQ1 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 LM76005QRNPRQ1 reliable?
The price and inventory of LM76005QRNPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM76005QRNPRQ1 is usually 5 days.
3.What payment methods are accepted for LM76005QRNPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM76005QRNPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM76005QRNPRQ1?
LM76005QRNPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM76005QRNPRQ1 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 LM76005QRNPRQ1?
For technical support, including LM76005QRNPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM76005QRNPRQ1 requirements.
6.How does Aetrix verify that LM76005QRNPRQ1 is sourced from the original manufacturer or authorized distributors?
All LM76005QRNPRQ1 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 LM76005QRNPRQ1 meets industry standards.
7.What is the process for return or replacement of LM76005QRNPRQ1?
All LM76005QRNPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM76005QRNPRQ1, 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 LM76005QRNPRQ1 part is unused and in its original packaging.
Return procedure for LM76005QRNPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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