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Texas Instruments LMR36015AQRNXTQ1
- Part No.:
- LMR36015AQRNXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36015AQRNXTQ1.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,385
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Product details
Overview
LMR36015AQRNXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 1.5 A output current across a 4.2 V to 60 V input range, featuring peak-current-mode control, 400 kHz fixed switching frequency, ±1.5% reference voltage tolerance, and integrated high-side/low-side MOSFETs. It serves as the primary power supply for automotive ADAS camera modules requiring compact, low-EMI, functional-safety-capable regulation.
For engineers reviewing the LMR36015AQRNXTQ1 datasheet, LMR36015AQRNXTQ1 pinout, LMR36015AQRNXTQ1 application, or LMR36015AQRNXTQ1 equivalent, key selection considerations include its 2-mm × 3-mm VQFN-HR package with wettable flanks, 26 µA quiescent current in PFM mode, 93% efficiency at 12 VIN/5 VOUT/1 A, thermal shutdown at 170°C, and power-good flag with 80–200 µs deglitch delay.
Technical Context
The LMR36015AQRNXTQ1 employs peak-current-mode control with internal loop compensation, enabling stable regulation without external compensation components. Its HotRod™ flip-chip packaging minimizes parasitic inductance, reducing switch-node ringing and supporting CISPR25 Class 5 EMI compliance via spread spectrum (±4% frequency modulation) and parallel input paths.
It operates in auto mode-transitioning between PWM (fixed 400 kHz) at medium-to-heavy loads and PFM with diode emulation at light loads-to maintain high efficiency across the full 0–1.5 A load range. The device integrates a precision enable input with hysteresis (110 mV), internal 5-V VCC LDO (4.75–5.25 V), and a true power-good flag with built-in filtering and startup delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 60 V - supports wide automotive battery transients including cold-crank (4.2 V) and load-dump (66 V absolute max). |
| Output Current | Up to 1.5 A - sufficient for powering image sensors, ISP processors, and interface logic in ADAS camera modules. |
| Switching Frequency | 400 kHz - enables use of small, cost-effective inductors while avoiding AM radio band interference. |
| Quiescent Current | 26 µA (typ.) - extends battery life in always-on automotive systems during standby or sleep modes. |
| Reference Voltage Tolerance | ±1.5% - ensures tight output regulation accuracy over temperature and line/load variations. |
| Thermal Shutdown | 170°C (shutdown), 158°C (recovery) - provides robust protection in under-hood environments with limited airflow. |
| Power-Good Delay | 80–200 µs - filters transient output excursions to prevent false system resets during load transients. |
| Package | VQFN-HR (12-pin, 2.0 mm × 3.0 mm) - ultra-small footprint with wettable flanks for reliable automated optical inspection (AOI). |
Pinout & Package
VQFN-HR (12-pin) package with 2.00 mm × 3.00 mm body size and wettable flanks for enhanced solder-joint reliability and AOI compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 2, 10) | Main power input | Accepts 4.2–60 V input; requires short, wide traces to CIN capacitor to minimize input loop inductance. |
| PGND (Pins 1, 11) | Power ground return | Must be connected to system ground and AGND; forms low-inductance return path for high-frequency switching currents. |
| AGND (Pin 6) | Analog ground reference | Ground reference for FB, EN, PG, and internal references; must be tied to PGND at single point on PCB. |
| EN (Pin 9) | Enable control input | Logic-level input with precise thresholds (1.157–1.3 V high, 0.3 V low); supports direct VIN connection or external UVLO divider. |
| BOOT (Pin 4) | High-side gate driver supply | Requires 100-nF ceramic capacitor to SW; critical for proper high-side MOSFET turn-on and efficiency. |
| SW (Pin 12) | Switch node | Connects to power inductor; high dv/dt node requiring minimized trace area to reduce EMI radiation. |
| FB (Pin 7) | Feedback input | Monitors output voltage via resistor divider; 1.0 V nominal reference enables adjustable output configurations. |
| PG (Pin 8) | Open-drain power-good flag | Asserts high when VOUT is within 93–107% of target; requires external pull-up resistor for microprocessor reset signaling. |
| VCC (Pin 5) | Internal 5-V LDO output | Supplies internal control circuitry; not for external loading; requires 1-µF bypass capacitor to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive reliability and lifetime requirements for body and ADAS applications. |
| Functional safety documentation support | Includes FIT rate data, failure mode analysis, and diagnostic coverage guidance - accelerates ISO 26262 ASIL-B system certification. |
| HotRod™ flip-chip packaging | Reduces package parasitic inductance by >50% versus standard QFN - lowers switch-node overshoot and radiated emissions. |
| CISPR25 Class 5 EMI compliance | Achieved without external snubbers or metal shielding - reduces BOM cost and layout complexity in space-constrained modules. |
| Integrated power-good flag with filtering | Eliminates need for external supervisor IC - provides glitch-free system reset signaling with programmable timing behavior. |
| Valley current limit + hiccup protection | Enables robust short-circuit handling with 94-ms hiccup interval - limits junction temperature rise during sustained output faults. |
Applications
| ADAS Camera Module Power Supply | Body Control Module (BCM) Sub-Regulator |
|---|---|
Use Scenario: Powers 5-MP CMOS image sensor, ISP SoC, and MIPI interface in rear-view or surround-view camera units mounted in vehicle exterior locations. IC Role / Device Role / Timing Role: Primary 5-V or adjustable intermediate rail regulator; delivers clean, low-noise power synchronized to camera frame timing. Use Value: 93% efficiency at 1 A reduces thermal load in sealed housing; 400 kHz switching avoids interference with image sensor clock harmonics. | Use Scenario: Generates 3.3-V or 5-V rail for microcontroller, CAN transceiver, and LED drivers in door module or seat control unit. IC Role / Device Role / Timing Role: Secondary buck regulator downstream of main 12-V battery rail; provides isolated, regulated power for digital subsystems. Use Value: 26 µA quiescent current enables <100 µA system sleep current; AEC-Q100 qualification ensures 15-year field reliability. |
| Automotive Infotainment Display Backlight Driver | Telematics Control Unit (TCU) Core Supply |
Use Scenario: Supplies bias voltage to LED backlight driver IC in center-stack display with variable brightness control. IC Role / Device Role / Timing Role: Constant-voltage pre-regulator feeding constant-current LED driver; maintains stable headroom across dimming cycles. Use Value: ±1.5% reference tolerance ensures consistent backlight intensity; 0.4-V dropout at 1.5 A preserves regulation during battery sag. | Use Scenario: Provides core 1.1-V or 1.8-V supply for LTE modem and application processor in cellular-connected TCU. IC Role / Device Role / Timing Role: Point-of-load regulator converting 5-V intermediate rail to processor core voltage; supports dynamic voltage scaling. Use Value: Internal loop compensation eliminates external compensation network; small 2×3 mm footprint saves PCB area in dense RF modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36015FSCQRNXTQ1 | 2.1 MHz switching frequency, spread spectrum enabled, FPWM mode only | Better suited for space-constrained designs needing higher frequency to shrink magnetics; not compatible for 400 kHz EMI-sensitive bands | Select when board layout prioritizes minimal inductor size over AM-band EMI concerns. |
| LMR33620QRNXTQ1 | 36 V max input, 2 A output, same 2×3 mm VQFN-HR package, 400 kHz/2.1 MHz options | Higher current capability but lower VIN rating - unsuitable for 48-V or load-dump tolerant 60-V designs | Choose for 12-V/24-V systems where >1.5 A load margin is required and input stays ≤36 V. |
Compared with LMR36015FSCQRNXTQ1, the LMR36015AQRNXTQ1 offers lower EMI in AM bands and simpler timing design due to absence of spread spectrum; compared with LMR33620QRNXTQ1, it supports wider input range critical for commercial vehicle and off-road applications but trades 0.5 A output current.
Availability
LMR36015AQRNXTQ1 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, body control modules, and telematics control units requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LMR36015AQRNXTQ1 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, embedded processing, and automotive-grade power management solutions, with decades of experience in automotive electronics design and qualification.
The LMR36015-Q1 product line delivers ultra-small, high-efficiency synchronous buck regulators optimized for automotive ADAS, infotainment, and body electronics where space, thermal performance, and functional safety are critical.
FAQ
What is the maximum input voltage rating for the LMR36015AQRNXTQ1?
The LMR36015AQRNXTQ1 has a recommended operating input voltage range of 4.2 V to 60 V, with an absolute maximum rating of 66 V on the VIN pin. This allows robust operation during automotive load-dump events while maintaining reliable regulation down to cold-crank conditions at 4.2 V. The LMR36015AQRNXTQ1 integrates protection features including input undervoltage lockout and thermal shutdown to safeguard against overvoltage stress.
Does the LMR36015AQRNXTQ1 support adjustable output voltage?
Yes, the LMR36015AQRNXTQ1 supports fully adjustable output voltage using an external resistor divider connected to the FB pin, with a 1.0 V internal reference voltage. The feedback network sets VOUT = 1.0 V × (1 + RFBT/RFBB). While fixed-output variants (e.g., 3.3 V) exist in the family, the LMR36015AQRNXTQ1 itself is the adjustable version - confirmed by TI's device comparison table listing its output voltage as "Adjustable" and no internal resistor network.
What package type and dimensions does the LMR36015AQRNXTQ1 use?
The LMR36015AQRNXTQ1 uses the VQFN-HR (12-pin) package with nominal body dimensions of 2.00 mm × 3.00 mm and wettable flanks. This HotRod™ flip-chip construction minimizes parasitic inductance and improves thermal performance. The package is explicitly listed in TI's Device Information table and supported by mechanical drawings in the datasheet's orderable addendum.
How does the power-good (PG) function operate on the LMR36015AQRNXTQ1?
The LMR36015AQRNXTQ1's PG pin is an open-drain output that asserts high when the output voltage is within 93–107% of the target (based on FB voltage), with 80–200 µs deglitch delay to reject transients. It goes low during startup, thermal shutdown, current limit, or EN deactivation. The LMR36015AQRNXTQ1 requires an external pull-up resistor; PG remains valid down to 2 V input, enabling reliable system supervision even during brown-out conditions.
Is the LMR36015AQRNXTQ1 pin-compatible with other devices in the LMR360xx-Q1 family?
No, the LMR36015AQRNXTQ1 is not pin-compatible with other members of the LMR360xx-Q1 family such as the LMR36006-Q1 or LMR33620/30-Q1. Although TI states "pin compatible with" in marketing text, the actual pin configuration differs: LMR36015-Q1 uses a 12-pin VQFN-HR with dedicated PGND, AGND, and NC pins, while LMR36006-Q1 uses an 8-pin VQFN and LMR33620/30-Q1 uses a 16-pin VQFN. Pin mapping, terminal count, and functions are not interchangeable - the LMR36015AQRNXTQ1 requires its own dedicated layout.
LMR36015AQRNXTQ1 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):
- 58V
- Current - Output:
- 1.5A
- 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)
LMR36015AQRNXTQ1 FAQ
1.How can I place an order for LMR36015AQRNXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36015AQRNXTQ1 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 LMR36015AQRNXTQ1 reliable?
The price and inventory of LMR36015AQRNXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36015AQRNXTQ1 is usually 5 days.
3.What payment methods are accepted for LMR36015AQRNXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36015AQRNXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36015AQRNXTQ1?
LMR36015AQRNXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36015AQRNXTQ1 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 LMR36015AQRNXTQ1?
For technical support, including LMR36015AQRNXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36015AQRNXTQ1 requirements.
6.How does Aetrix verify that LMR36015AQRNXTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36015AQRNXTQ1 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 LMR36015AQRNXTQ1 meets industry standards.
7.What is the process for return or replacement of LMR36015AQRNXTQ1?
All LMR36015AQRNXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36015AQRNXTQ1, 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 LMR36015AQRNXTQ1 part is unused and in its original packaging.
Return procedure for LMR36015AQRNXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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