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Texas Instruments LMR36015SC3QRNXRQ1
- Part No.:
- LMR36015SC3QRNXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36015SC3QRNXRQ1.pdf
- Description:
- IC REG BUCK 3.3V 1.5A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
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Product details
Overview
LMR36015SC3QRNXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 1.5 A at fixed 3.3 V output, operating from 4.2 V to 60 V input, with 2.1-MHz switching frequency, spread-spectrum modulation, and integrated high-side/low-side MOSFETs - used in ADAS camera modules for compact, low-EMI power rail generation.
For engineers reviewing the LMR36015SC3QRNXRQ1 datasheet, LMR36015SC3QRNXRQ1 pinout, LMR36015SC3QRNXRQ1 application, or LMR36015SC3QRNXRQ1 equivalent, key selection considerations include its 3.3-V fixed output, 2.1-MHz FPWM operation (no PFM), ±1.5% output voltage accuracy, thermal shutdown at 170°C, and HotRod™ VQFN-HR (12-pin, 2.0 mm × 3.0 mm) package with wettable flanks.
Technical Context
The LMR36015SC3QRNXRQ1 employs peak-current-mode control with internal loop compensation, enabling stable regulation across 4.2–60 V input while maintaining 3.3 V ±1.5% output accuracy. Its 2.1-MHz fixed-frequency PWM operation (FPWM variant) eliminates light-load frequency variation and supports tight transient response in safety-critical automotive domains.
It integrates a precision enable input with hysteresis (110 mV), open-drain power-good flag with 80–200 µs deglitch delay and 93–95% lower threshold, and protection features including cycle-by-cycle current limit (2.4 A typ. high-side), hiccup short-circuit mode (94 ms off-time), and thermal shutdown (170°C trip, 158°C recovery).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 60 V - supports wide automotive battery transients up to 66 V absolute max. |
| Output Voltage | Fixed 3.3 V (3.23–3.37 V) - eliminates external feedback resistors; ±1.5% tolerance ensures reliable MCU I/O rail compliance. |
| Switching Frequency | 2.1 MHz (1.95–2.35 MHz) - enables use of small 1–2.2 µH inductors and reduces solution footprint. |
| Max Output Current | 1.5 A continuous - sufficient for dual-core microcontrollers or image sensors in camera modules. |
| Quiescent Current | 26 µA typical - sustains low-power sleep modes without compromising system battery life. |
| Efficiency | 93% at 12 VIN/5 VOUT/1 A - measured at 400 kHz; actual 2.1-MHz efficiency optimized for EMI-sensitive zones. |
| Thermal Shutdown | 170°C junction - protects against sustained overload or poor PCB thermal design; recovers at 158°C. |
Pinout & Package
LMR36015SC3QRNXRQ1 uses a 12-pin VQFN-HR (RNX) package measuring 2.00 mm × 3.00 mm with wettable flanks for automated optical inspection (AOI). The HotRod™ flip-chip construction minimizes parasitic inductance and improves EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 2, 10) | Primary input supply | Accepts 4.2–60 V; must connect to CIN via short, wide traces to minimize voltage drop and ringing. |
| SW (Pin 12) | Switch node | Connects directly to power inductor; high dv/dt node requiring minimized trace area and proximity to PGND. |
| BOOT (Pin 4) | Bootstrap supply | Requires 100-nF ceramic capacitor to SW; enables high-side MOSFET gate drive during each switching cycle. |
| FB (Pin 7) | Feedback reference | Internally tied to 3.3-V output; no external divider needed - simplifies layout and improves stability. |
| PG (Pin 8) | Power-good flag | Open-drain output indicating VOUT within 93–107% of nominal; requires external pull-up for system reset coordination. |
| EN (Pin 9) | Enable control | Logic-level input with 1.157–1.3 V turn-on threshold; supports direct VIN connection or precision UVLO via resistor divider. |
| AGND (Pin 6) | Analog ground reference | Ground return for FB, EN, PG; must be star-connected to PGND near device to avoid noise coupling. |
| PGND (Pins 1, 11) | Power ground | High-current return path for VIN, SW, and CIN; connects to system ground and AGND with low-inductance copper pour. |
| VCC (Pin 5) | Internal 5-V LDO output | Supplies internal circuitry; not for external loads; requires 1-µF decoupling to AGND. |
| NC (Pin 3) | No-connect | Internally unconnected; PCB trace may route CBOOT to SW, simplifying layout. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±4% frequency dithering at 16 kHz repetition rate - reduces peak radiated emissions to meet CISPR-25 Class 5. |
| HotRod™ packaging | Flip-chip construction with copper leadframe - cuts switch-node ringing by >50% vs. standard QFN, enabling cleaner 2.1-MHz operation. |
| Integrated power MOSFETs | 225 mΩ high-side / 150 mΩ low-side RDS(on) - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Hiccup short-circuit protection | 94-ms off-time followed by soft-start restart - limits average power dissipation during sustained output shorts, preventing thermal runaway. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C TA) and junction range –40°C to +150°C - validated for under-hood and ADAS module deployment. |
Applications
| ADAS Camera Module | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers image sensor, ISP, and interface logic in rear-view or surround-view cameras mounted on vehicle exterior. IC Role / Device Role / Timing Role: Primary 3.3-V power rail generator with fast transient response to handle burst-mode sensor readout and video streaming. Use Value: Spread-spectrum and HotRod™ design meets stringent CISPR-25 Class 5 EMI limits without added shielding or ferrites. | Use Scenario: Supplies microcontroller, CAN transceiver, and LED drivers in centralized vehicle body electronics units. IC Role / Device Role / Timing Role: Main system regulator converting battery voltage to stable 3.3-V logic rail with robust start-up sequencing and fault reporting. Use Value: Power-good flag provides deterministic reset signaling to MCU; thermal shutdown prevents latch-up during load dump events. |
| Infotainment Display Unit | Electronic Parking Brake (EPB) Controller |
Use Scenario: Delivers clean 3.3-V supply to touch controller, display driver ICs, and audio codecs in center-stack displays. IC Role / Device Role / Timing Role: Fixed-output buck converter with low quiescent current (26 µA) supporting always-on wake-up functionality. Use Value: 2.1-MHz switching allows use of tiny 1.5-µH shielded inductors, minimizing board space in space-constrained dash designs. | Use Scenario: Provides safety-critical 3.3-V rail for brake actuator MCU and position sensor interfaces in EPB systems. IC Role / Device Role / Timing Role: Functional-safety-capable regulator with diagnostic power-good output and overtemperature protection. Use Value: AEC-Q100 qualification and documented functional safety support (FIT rate, failure modes) aid ISO 26262 ASIL-B compliance. |
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 |
|---|---|---|---|
| LMR36015FSC3RNXRQ1 | Same 3.3-V fixed output, 2.1-MHz frequency, but includes FPWM + spread spectrum (LMR36015SC3QRNXRQ1 has spread spectrum only, no FPWM) | Required where forced continuous conduction mode is mandatory across full load range (e.g., noise-sensitive ADC references) | Select LMR36015FSC3RNXRQ1 if FPWM operation is required; otherwise LMR36015SC3QRNXRQ1 suffices for most 3.3-V automotive rails. |
| LMR36006QRNXRQ1 | 60-V, 0.6-A adjustable-output variant; pin-compatible but lower current rating and no fixed 3.3-V option | Suitable for lower-power subsystems (e.g., LIN transceivers, sensors) where 1.5-A headroom is unnecessary | Choose LMR36006QRNXRQ1 only when output current ≤0.6 A and adjustable VOUT is acceptable - not a drop-in replacement for LMR36015SC3QRNXRQ1. |
Compared with LMR36015FSC3RNXRQ1, LMR36015SC3QRNXRQ1 omits FPWM mode but retains spread-spectrum EMI reduction; versus LMR36006QRNXRQ1, it delivers 2.5× higher output current and factory-trimmed 3.3-V output, making it optimal for mid-power ADAS and BCM applications requiring minimal external components.
Availability
LMR36015SC3QRNXRQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, body control modules, and infotainment display units requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for LMR36015SC3QRNXRQ1 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 power management ICs for automotive, industrial, and communications markets.
The LMR36015-Q1 product line delivers ultra-small, high-voltage synchronous buck converters optimized for automotive ADAS, infotainment, and body electronics - emphasizing low EMI, functional safety readiness, and simplified design-in through integrated MOSFETs and HotRod™ packaging.
FAQ
What is the output voltage configuration of the LMR36015SC3QRNXRQ1?
The LMR36015SC3QRNXRQ1 is a fixed-output converter delivering 3.3 V with ±1.5% tolerance (3.23–3.37 V) across temperature and load. It does not require external feedback resistors - the FB pin is internally connected to the regulated output, simplifying layout and improving accuracy versus adjustable variants.
Does the LMR36015SC3QRNXRQ1 support forced PWM (FPWM) mode?
No, the LMR36015SC3QRNXRQ1 operates in standard PWM mode with spread-spectrum modulation but does not support forced PWM (FPWM). Its datasheet specifies "No" for FPWM in the Device Comparison Table. For FPWM capability, consider LMR36015FSC3RNXRQ1 - same 3.3-V output and 2.1-MHz frequency but with FPWM enabled.
What package type and dimensions does the LMR36015SC3QRNXRQ1 use?
The LMR36015SC3QRNXRQ1 uses the VQFN-HR (RNX) package: a 12-pin, 2.00 mm × 3.00 mm wettable-flank quad flat no-lead package with HotRod™ flip-chip construction. This design minimizes parasitic inductance, improves thermal performance (RθJA = 72.5°C/W), and enables AOI-compatible solder joint inspection.
How does the power-good (PG) function operate on the LMR36015SC3QRNXRQ1?
The LMR36015SC3QRNXRQ1's PG pin is an open-drain output that goes low when VOUT falls below 93% of nominal (3.07 V) or rises above 107% (3.53 V), with 80–200 µs deglitch delay. It remains valid down to 2 V input and asserts low during EN deactivation, providing reliable system reset signaling without external supervision circuitry.
What protection features are integrated into the LMR36015SC3QRNXRQ1?
The LMR36015SC3QRNXRQ1 integrates thermal shutdown (170°C trip, 158°C recovery), input undervoltage lockout (via VCC LDO), cycle-by-cycle current limit (2.4 A high-side peak), hiccup-mode short-circuit protection (94-ms off-time), and input overvoltage tolerance up to 66 V. These features ensure robust operation in harsh automotive environments without external protection components.
LMR36015SC3QRNXRQ1 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.2V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2.1MHz
- 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)
LMR36015SC3QRNXRQ1 FAQ
1.How can I place an order for LMR36015SC3QRNXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36015SC3QRNXRQ1 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 LMR36015SC3QRNXRQ1 reliable?
The price and inventory of LMR36015SC3QRNXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36015SC3QRNXRQ1 is usually 5 days.
3.What payment methods are accepted for LMR36015SC3QRNXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36015SC3QRNXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36015SC3QRNXRQ1?
LMR36015SC3QRNXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36015SC3QRNXRQ1 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 LMR36015SC3QRNXRQ1?
For technical support, including LMR36015SC3QRNXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36015SC3QRNXRQ1 requirements.
6.How does Aetrix verify that LMR36015SC3QRNXRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36015SC3QRNXRQ1 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 LMR36015SC3QRNXRQ1 meets industry standards.
7.What is the process for return or replacement of LMR36015SC3QRNXRQ1?
All LMR36015SC3QRNXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36015SC3QRNXRQ1, 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 LMR36015SC3QRNXRQ1 part is unused and in its original packaging.
Return procedure for LMR36015SC3QRNXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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