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Texas Instruments LMR36006AQRNXRQ1
- Part No.:
- LMR36006AQRNXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36006AQRNXRQ1.pdf
- Description:
- IC REG BUCK ADJ 600MA 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LMR36006AQRNXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 0.6 A over 4.2 V–60 V input, with 400-kHz fixed switching frequency, ±1.5% reference voltage tolerance, and integrated high-side/low-side MOSFETs in a 2-mm × 3-mm VQFN-HR package. It powers ADAS camera modules and body control units under harsh thermal conditions (–40°C to +125°C ambient).
For engineers reviewing the LMR36006AQRNXRQ1 datasheet, LMR36006AQRNXRQ1 pinout, LMR36006AQRNXRQ1 application, or LMR36006AQRNXRQ1 equivalent, key selection criteria include its 400-kHz switching frequency, 26-µA quiescent current in PFM mode, HotRod™ package for CISPR25 Class 5 EMI compliance, and precision enable with hysteresis for robust automotive start-up sequencing.
Technical Context
The LMR36006AQRNXRQ1 uses peak-current-mode control with internal loop compensation, enabling stable regulation across wide VIN–VOUT ratios (e.g., 20 V → 5 V at 2.1 MHz) without external compensation components. Its auto-mode transitions between PWM (fixed-frequency, high-load) and PFM (diode-emulation, light-load) to maintain >94% efficiency at 12 VIN/5 VOUT/0.6 A while minimizing no-load IQ.
Functional safety support includes documentation for ISO 26262 ASIL-B system integration, thermal shutdown (170°C trip), hiccup-mode short-circuit protection (94-ms off-time), and precise power-good flag with 80–200 µs deglitch delay and ±7% FB threshold hysteresis - all validated for junction temperatures up to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 60 V - supports 12-V and 24-V automotive battery rails with 66-V absolute max tolerance for load dump survival. |
| Output Current | 0.6 A continuous - sufficient for powering image sensors, microcontrollers, and CAN transceivers in compact ADAS modules. |
| Switching Frequency | 400 kHz - enables use of small, low-profile inductors (e.g., 2.2 µH) while avoiding AM radio band interference. |
| Quiescent Current | 26 µA typical in PFM - extends battery life in always-on vehicle systems such as parking cameras and occupancy sensors. |
| Reference Voltage Accuracy | ±1.5% - ensures tight output regulation (e.g., ±50 mV on 3.3-V fixed option) without trimming resistors. |
| Thermal Shutdown | 170°C trip / 158°C recovery - protects against sustained overload or poor PCB heatsinking in sealed enclosures. |
| EMI Performance | CISPR25 Class 5 compliant - meets stringent automotive radiated emissions requirements without added shielding or filters. |
Pinout & Package
The LMR36006AQRNXRQ1 is housed in a 12-pin VQFN-HR (RNX) package measuring 2.00 mm × 3.00 mm with wettable flanks for automated optical inspection. The thermally enhanced HotRod™ construction minimizes switch-node ringing and improves power density.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 PGND | Power ground | Low-inductance return path for high di/dt currents; must be tied directly to AGND and CIN ground plane with wide copper pours. |
| 2, 10 VIN | Main input supply | Accepts 4.2–60 V; requires local 10-µF ceramic input capacitor placed within 2 mm of pins 2 and 10. |
| 3 NC | No connect | Internally unconnected; used on PCB to route CBOOT to SW - simplifies layout and reduces parasitic inductance. |
| 4 BOOT | Bootstrap supply | Drives high-side MOSFET gate; requires 100-nF X7R ceramic capacitor connected directly to SW pin. |
| 5 VCC | Internal 5-V LDO output | Powers internal logic; not for external loads; requires 1-µF decoupling to AGND. |
| 6 AGND | Analog ground reference | Ground reference for FB, EN, and PG; must be star-connected to PGND near IC to avoid noise coupling. |
| 7 FB | Feedback input | Monitors output via resistor divider; 1-V internal reference enables adjustable or fixed 3.3-V outputs. |
| 8 PG | Open-drain power-good flag | Signals valid regulation after soft-start; requires external pull-up; asserts low during UVLO, OCP, or thermal fault. |
| 9 EN | Enable input | Logic-level control with 1.157–1.231 V turn-on threshold and 110-mV hysteresis - supports direct VIN connection or precision UVLO. |
| 12 SW | Switch node | Connects to inductor; high dv/dt node requiring minimal trace length and no vias to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| HotRod™ packaging | Eliminates bond wires to reduce switch-node ringing and parasitic inductance - critical for meeting CISPR25 Class 5 emissions limits. |
| Auto PFM/PWM mode transition | Maintains >90% efficiency from 1 mA to 600 mA load without manual mode selection or external control signals. |
| Integrated power-good flag | Provides system reset capability with built-in 80–200 µs deglitch filtering - removes need for external supervisor IC. |
| Thermal and fault protection | Combines cycle-by-cycle current limit, hiccup-mode short-circuit response, and 170°C thermal shutdown - enables robust operation in unventilated automotive housings. |
| Small solution size | 2-mm × 3-mm footprint with only 6 external components (CIN, COUT, L, CBOOT, RFBT, RFBB) - fits inside space-constrained camera modules. |
Applications
| ADAS Camera Module | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 5-MP CMOS image sensor and ISP in rear-view or surround-view camera housing exposed to under-hood temperature cycling. IC Role / Device Role / Timing Role: Primary 3.3-V or adjustable rail regulator supplying sensor analog core, digital I/O, and MIPI interface - delivers stable voltage during cold cranking (4.2 V) and load dump (60 V). Use Value: 26-µA quiescent current extends battery drain time in parked-camera recording; 400-kHz switching avoids interference with RF receivers; HotRod™ package passes EMI testing without ferrite beads. | Use Scenario: Supplies 5-V logic rail for door module MCU, window motor drivers, and LIN transceivers in door panel electronics. IC Role / Device Role / Timing Role: Secondary buck converter stepping down 12-V battery to regulated 5 V - operates continuously across –40°C to +125°C ambient with AEC-Q100 Grade 1 qualification. Use Value: ±1.5% reference accuracy ensures reliable MCU brown-out detection; precision enable allows controlled wake-up from sleep mode; PG flag synchronizes MCU boot sequence. |
| Infotainment Display Backlight | Telematics Control Unit (TCU) |
Use Scenario: Generates bias voltage for LED driver IC in center-stack LCD display with variable brightness control. IC Role / Device Role / Timing Role: Adjustable-output buck supplying 8–12 V to constant-current LED driver - maintains regulation during engine start transient (5-V dip). Use Value: 60-V input rating handles alternator surges; 0.2-V dropout at 0.6-A load preserves headroom for dimming; spread-spectrum option (not on this variant) available for noise-sensitive audio paths. | Use Scenario: Powers cellular modem, GNSS receiver, and CAN FD controller in telematics gateway mounted near battery junction box. IC Role / Device Role / Timing Role: Input-filtered 5-V rail generator supporting dual-power domains - withstands repeated 66-V load dump pulses per ISO 7637-2. Use Value: Thermal shutdown and hiccup protection prevent latch-up during shorted antenna cables; VQFN-HR wettable flanks ensure solder joint reliability in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36015AQRNXRQ1 | Same pinout, 1.5-A output, 60-V max input - higher current capability with identical thermal and EMI performance. | Suitable for systems scaling from 0.6 A to 1.5 A (e.g., multi-sensor fusion modules) without PCB redesign. | Select when future-proofing for higher load or parallel operation; shares same layout and BOM structure. |
| LMR33620AQDRBRQ1 | 36-V max input, 2-A output, different pinout (8-pin WSON), no PG flag - lower voltage rating but higher current and smaller footprint. | Better suited for 12-V-only systems (e.g., interior lighting controllers) where 60-V capability is unnecessary. | Choose for cost-sensitive 12-V applications needing >0.6 A; requires new layout and lacks power-good signaling. |
Compared with LMR36015AQRNXRQ1 and LMR33620AQDRBRQ1, the LMR36006AQRNXRQ1 offers optimal balance of 60-V survivability, ultra-low IQ, and integrated PG flag in the smallest footprint - making it ideal for space- and power-constrained ADAS edge nodes where full 0.6-A capability suffices.
Availability
LMR36006AQRNXRQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, body control modules, and telematics control units requiring stable component supply across automotive production lifecycles.
Supply support for LMR36006AQRNXRQ1 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 and embedded processing technologies, with decades of automotive-grade product development and AEC-Q100 validation expertise.
The LMR36006AQRNXRQ1 belongs to TI's automotive-qualified LMR360xx-Q1 buck converter family, designed specifically for compact, high-reliability power supplies in ADAS, infotainment, and body electronics where input voltage resilience, low EMI, and functional safety readiness are mandatory.
FAQ
What is the maximum input voltage rating for the LMR36006AQRNXRQ1?
The LMR36006AQRNXRQ1 has an absolute maximum input voltage rating of 66 V, with recommended operating range from 4.2 V to 60 V. This 60-V upper limit ensures reliable operation during automotive load dump events defined by ISO 7637-2, while the 66-V absolute max provides margin against transient overvoltage spikes. The device maintains regulation and protection functionality across this full range without derating.
Does the LMR36006AQRNXRQ1 support fixed-output voltage configurations?
Yes, the LMR36006AQRNXRQ1 supports both adjustable and fixed-output configurations. While the LMR36006AQRNXRQ1 itself is adjustable via external feedback resistors, TI offers pin-compatible fixed-output variants including the LMR36006FSC3RNXRQ1 (3.3-V fixed, 2.1-MHz). The LMR36006AQRNXRQ1's 1-V internal reference and FB pin allow precise 3.3-V, 5-V, or other outputs using standard resistor dividers - verified to ±1.5% tolerance over temperature.
How does the power-good (PG) flag on the LMR36006AQRNXRQ1 behave during startup and fault conditions?
The LMR36006AQRNXRQ1 PG flag is an open-drain output that goes high after soft-start completes (~4 ms delay from EN assertion) when output voltage reaches 105–110% of target. It pulls low during undervoltage (FB < 93%), overcurrent, thermal shutdown, or EN deactivation. With built-in 80–200 µs deglitching, brief transients do not trigger false faults. When EN is low, PG remains valid down to 2 V input - enabling system reset coordination even during brown-out.
What thermal performance can be expected from the LMR36006AQRNXRQ1 in a typical 2-layer PCB layout?
In a standard 2-layer board with 1-in² 2-oz copper thermal pad connected to PGND, the LMR36006AQRNXRQ1 achieves a junction-to-board thermal resistance (RθJB) of 23.3°C/W. At 0.6-A load and 24-V input, typical power dissipation is ~350 mW, resulting in ~8°C rise above ambient - well below the 150°C max junction limit. The VQFN-HR package's wettable flanks enhance solder thermal conduction, and the HotRod™ structure reduces die self-heating by minimizing switching losses.
Is the LMR36006AQRNXRQ1 compatible with WEBENCH® Power Designer for custom design creation?
Yes, the LMR36006AQRNXRQ1 is fully supported in TI's WEBENCH® Power Designer tool. Engineers can enter input/output specifications, select LMR36006AQRNXRQ1 from the component library, and generate complete schematics, bill-of-materials, efficiency plots, thermal simulations, and PCB layout recommendations - including optimized component values for 400-kHz operation and EMI-compliant layout guidelines specific to the VQFN-HR package.
LMR36006AQRNXRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-PowerVFQFN
- 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):
- 4.2V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 60V
- Current - Output:
- 600mA
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-VQFN-HR (3x2)
LMR36006AQRNXRQ1 FAQ
1.How can I place an order for LMR36006AQRNXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36006AQRNXRQ1 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 LMR36006AQRNXRQ1 reliable?
The price and inventory of LMR36006AQRNXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36006AQRNXRQ1 is usually 5 days.
3.What payment methods are accepted for LMR36006AQRNXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36006AQRNXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36006AQRNXRQ1?
LMR36006AQRNXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36006AQRNXRQ1 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 LMR36006AQRNXRQ1?
For technical support, including LMR36006AQRNXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36006AQRNXRQ1 requirements.
6.How does Aetrix verify that LMR36006AQRNXRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36006AQRNXRQ1 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 LMR36006AQRNXRQ1 meets industry standards.
7.What is the process for return or replacement of LMR36006AQRNXRQ1?
All LMR36006AQRNXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36006AQRNXRQ1, 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 LMR36006AQRNXRQ1 part is unused and in its original packaging.
Return procedure for LMR36006AQRNXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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