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Texas Instruments LMR36015SC3QRNXTQ1
- Part No.:
- LMR36015SC3QRNXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36015SC3QRNXTQ1.pdf
- Description:
- IC REG BUCK 3.3V 1.5A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:945
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Product details
Overview
LMR36015SC3QRNXTQ1 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 EMI reduction, and integrated high-side/low-side MOSFETs - deployed in ADAS camera modules for compact, low-noise power rail generation.
For engineers reviewing the LMR36015SC3QRNXTQ1 datasheet, LMR36015SC3QRNXTQ1 pinout, LMR36015SC3QRNXTQ1 application, or LMR36015SC3QRNXTQ1 equivalent, key selection criteria include its 3.3-V fixed output, HotRod™ VQFN-HR (12) package with wettable flanks, ±1.5% output voltage tolerance, functional safety documentation support, and CISPR25 Class 5 compliance for automotive EMI-critical systems.
Technical Context
The LMR36015SC3QRNXTQ1 uses peak-current-mode control with internal loop compensation, enabling stable regulation across 4.2–60 V input while maintaining 3.3 V ±1.5% accuracy. It automatically transitions between PWM (full-load) and PFM (light-load) modes to sustain >93% efficiency at 1 A and 26 µA quiescent current.
Its HotRod™ flip-chip VQFN-HR package minimizes switch-node ringing and parasitic inductance via parallel input paths and optimized layout; spread-spectrum modulation (±4% frequency deviation at 16 kHz) reduces peak EMI emissions to meet CISPR25 Class 5 without external filters.
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 Voltage | Fixed 3.3 V ±1.5% - eliminates external feedback resistors; enables direct powering of MCU I/O, sensors, and SerDes interfaces |
| Switching Frequency | 2.1 MHz (±7%) - allows use of small 1–2.2 µH inductors and avoids AM radio band; supports compact PCB layout |
| Max Output Current | 1.5 A continuous - sufficient for dual-core vision processors or multi-sensor camera modules |
| Quiescent Current | 26 µA typical - extends battery life in always-on ADAS subsystems during sleep mode |
| EMI Performance | CISPR25 Class 5 compliant - meets stringent automotive radiated emission limits without ferrite beads or shielding cans |
| Thermal Protection | Thermal shutdown at 170°C with 12°C hysteresis - ensures safe operation under sustained overload or poor heatsinking |
Pinout & Package
LMR36015SC3QRNXTQ1 is housed in a 2.0 mm × 3.0 mm, 12-pin VQFN-HR (RNX) package with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 2, 10) | Primary input power supply | Accepts 4.2–60 V; must connect to CIN via short, wide copper traces to minimize input loop inductance |
| PGND (Pins 1, 11) | Power ground return | Low-impedance path for high di/dt switching currents; requires dedicated thermal pad connection to PCB ground plane |
| SW (Pin 12) | Switch node | Connects to power inductor; carries full switching waveform (0 V to VIN); critical for EMI layout |
| BOOT (Pin 4) | High-side gate driver supply | Requires 100-nF ceramic capacitor to SW; bootstrapping enables efficient high-side FET drive without external charge pump |
| FB (Pin 7) | Feedback reference input | Internally tied to 3.3-V output; no external divider needed - simplifies design and improves noise immunity |
| PG (Pin 8) | Open-drain power-good flag | Asserts high after soft-start when VOUT reaches 105% of target; includes 140-µs deglitch filter to reject transient dips |
| EN (Pin 9) | Enable control input | Logic-compatible threshold (1.231 V typ. high); supports direct VIN tie or precision UVLO via resistor divider |
| VCC (Pin 5) | Internal 5-V LDO output | Supplies internal circuitry; not for external loads - bypass with 1-µF ceramic to AGND |
| AGND (Pin 6) | Analog ground reference | Reference for FB, EN, PG; must be star-connected to PGND under IC to avoid noise coupling into feedback path |
| NC (Pin 3) | No-connect | Internally unconnected; PCB trace may route CBOOT capacitor to SW - improves layout symmetry and reduces routing inductance |
Key Features
| Feature | Design Value |
|---|---|
| HotRod™ flip-chip packaging | Reduces switch-node ringing by >50% vs. standard QFN, enabling cleaner waveforms and lower EMI without snubbers |
| Integrated spread-spectrum modulation | ±4% frequency dither at 16 kHz lowers peak radiated emissions by up to 10 dB, easing CISPR25 Class 5 certification |
| Auto PFM/PWM transition | Maintains >85% efficiency down to 1 mA load while holding 26 µA IQ - ideal for duty-cycled vision sensors |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage data per ISO 26262 ASIL-B readiness guidance |
| Robust protection suite | Combines cycle-by-cycle current limit, hiccup-mode short-circuit response (94 ms off-time), thermal shutdown (170°C), and input UVLO |
Applications
| ADAS Camera Module | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering 5-MP image sensor, ISP, and MIPI CSI-2 serializer in rear-view or surround-view camera. IC Role / Device Role / Timing Role: Primary 3.3-V rail regulator with fast transient response (<10 µs recovery) and ultra-low EMI to prevent image noise or video artifacts. Use Value: Enables single-layer inductor solution with <8 mm² total footprint; meets OEM EMI mask requirements without shielded inductors. | Use Scenario: Supplying microcontroller, LIN transceivers, LED drivers, and position sensors in door module or lighting control unit. IC Role / Device Role / Timing Role: Main system rail generator supporting cold-crank (4.2 V) and load-dump (60 V) conditions with seamless operation across -40°C to +125°C ambient. Use Value: Eliminates need for pre-regulator stage; 93% efficiency at 1 A reduces thermal stress in sealed plastic enclosures. |
| Automotive Infotainment Display | Telematics Control Unit (TCU) |
Use Scenario: Generating 3.3-V bias for display timing controller, touch controller, and backlight driver ICs in central display head unit. IC Role / Device Role / Timing Role: Fixed-output buck converter with power-good flag used for sequenced power-up of display subsystems. Use Value: PG signal provides clean reset assertion to display controller; ±1.5% output tolerance ensures reliable DDR I/O voltage margining. | Use Scenario: Powering cellular modem baseband processor, GNSS receiver, and CAN FD transceiver in vehicle-to-cloud communication module. IC Role / Device Role / Timing Role: High-reliability 3.3-V supply with functional safety documentation and AEC-Q100 Grade 1 qualification for ASIL-B system integration. Use Value: Supports ISO 26262 hardware element decomposition; built-in diagnostics reduce FMEDA effort for TCU safety case. |
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 |
|---|---|---|---|
| LMR36015FSC3RNXTQ1 | Same 3.3-V fixed output, but adds FPWM mode (forced PWM at light load) and spread spectrum - higher light-load ripple, slightly lower efficiency below 10 mA | Preferred where constant-frequency operation is required for EMI predictability or clock-sensitive peripherals | Select LMR36015FSC3RNXTQ1 if system requires deterministic switching frequency across full load range; otherwise LMR36015SC3QRNXTQ1 offers superior light-load efficiency. |
| LMR33620SQ3RNXRQ1 | 36-V input, 2-A output, 3.3-V fixed option; same VQFN-HR package but different pinout - not pin-compatible; lacks spread spectrum | Suitable for lower-voltage 12-V battery systems requiring higher current, but requires layout revision and additional EMI filtering | Choose LMR33620SQ3RNXRQ1 only when 2-A capability is mandatory and input voltage never exceeds 36 V; LMR36015SC3QRNXTQ1 remains optimal for 48-V architectures or strict CISPR25 Class 5 needs. |
Compared with LMR36015FSC3RNXTQ1, LMR36015SC3QRNXTQ1 trades FPWM determinism for 3× lower IQ in PFM mode; versus LMR33620SQ3RNXRQ1, it delivers 60-V robustness and certified EMI performance at the cost of 0.5-A lower current rating - making it the preferred choice for scalable, high-voltage automotive camera rails.
Availability
LMR36015SC3QRNXTQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, body control modules, and telematics control units requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.
Supply support for LMR36015SC3QRNXTQ1 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 and functional safety solutions.
The LMR36015-Q1 product line delivers ultra-small, high-voltage synchronous buck converters optimized for space-constrained, EMI-sensitive automotive subsystems - particularly vision-based ADAS and domain controllers requiring robust 3.3-V or adjustable rails.
FAQ
What is the maximum input voltage rating for the LMR36015SC3QRNXTQ1?
The LMR36015SC3QRNXTQ1 has an absolute maximum input voltage rating of 66 V, with recommended operating range from 4.2 V to 60 V. This allows reliable operation during automotive load-dump events (up to 60 V sustained) and cold-crank conditions (down to 4.2 V), making it suitable for 12-V, 24-V, and 48-V vehicle electrical architectures. The 66-V absolute max provides design margin against transient spikes.
Does the LMR36015SC3QRNXTQ1 require external feedback resistors for its 3.3-V output?
No, the LMR36015SC3QRNXTQ1 is a fixed 3.3-V output variant - the feedback divider is fully internal. Pin 7 (FB) connects directly to the internal reference and requires no external components. This eliminates resistor tolerance errors, reduces BOM count, improves noise immunity, and simplifies layout compared to adjustable versions like LMR36015AQRNXTQ1.
How does the power-good (PG) flag behave during startup and fault conditions for the LMR36015SC3QRNXTQ1?
The LMR36015SC3QRNXTQ1 PG pin is an open-drain output that asserts high after soft-start completes (≈4 ms delay from EN assertion) when VOUT reaches ≥105% of 3.3 V. It pulls low during undervoltage (VOUT ≤93%), overcurrent, thermal shutdown, or EN deactivation. A built-in 140-µs deglitch filter prevents false triggering from brief transients. When unused, PG must be grounded.
What thermal metrics apply to the LMR36015SC3QRNXTQ1 in its VQFN-HR package?
The LMR36015SC3QRNXTQ1 in the 2-mm × 3-mm VQFN-HR (RNX) package has RθJA = 72.5°C/W (JEDEC high-K board), RθJB = 23.3°C/W, and ψJB = 23.5°C/W. Its thermal shutdown activates at 170°C junction temperature with 12°C hysteresis (recovery at 158°C). These metrics assume proper PCB copper area (≥250 mm² thermal pad) and are validated per JESD51 standards for automotive under-hood environments.
Is the LMR36015SC3QRNXTQ1 pin-compatible with other devices in the LMR360xx-Q1 family?
No, the LMR36015SC3QRNXTQ1 is not pin-compatible with LMR36006-Q1 or LMR33620/30-Q1 despite shared VQFN-HR packaging - pin functions differ significantly (e.g., NC placement, PGND/VIN pin count, BOOT routing). TI explicitly states "pin compatible with" only for specific variants (e.g., LMR36015-Q1 vs. LMR36006-Q1), but LMR36015SC3QRNXTQ1's fixed-output configuration and spread-spectrum enablement alter internal signal routing and validation. Layout redesign is required for substitution.
LMR36015SC3QRNXTQ1 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)
LMR36015SC3QRNXTQ1 FAQ
1.How can I place an order for LMR36015SC3QRNXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36015SC3QRNXTQ1 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 LMR36015SC3QRNXTQ1 reliable?
The price and inventory of LMR36015SC3QRNXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36015SC3QRNXTQ1 is usually 5 days.
3.What payment methods are accepted for LMR36015SC3QRNXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36015SC3QRNXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36015SC3QRNXTQ1?
LMR36015SC3QRNXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36015SC3QRNXTQ1 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 LMR36015SC3QRNXTQ1?
For technical support, including LMR36015SC3QRNXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36015SC3QRNXTQ1 requirements.
6.How does Aetrix verify that LMR36015SC3QRNXTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36015SC3QRNXTQ1 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 LMR36015SC3QRNXTQ1 meets industry standards.
7.What is the process for return or replacement of LMR36015SC3QRNXTQ1?
All LMR36015SC3QRNXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36015SC3QRNXTQ1, 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 LMR36015SC3QRNXTQ1 part is unused and in its original packaging.
Return procedure for LMR36015SC3QRNXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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