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Texas Instruments LMR36015FSC3RNXRQ1
- Part No.:
- LMR36015FSC3RNXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36015FSC3RNXRQ1.pdf
- Description:
- IC REG BUCK 3.3V 1.5A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
LMR36015FSC3RNXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade 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 FPWM mode-designed for ADAS camera modules requiring low EMI and high reliability in under-hood environments.
For engineers reviewing the LMR36015FSC3RNXRQ1 datasheet, LMR36015FSC3RNXRQ1 pinout, LMR36015FSC3RNXRQ1 application, or LMR36015FSC3RNXRQ1 equivalent, key selection considerations include its 3.3-V fixed output, 2.1-MHz FPWM operation with spread spectrum, HotRod™ VQFN-HR (12) package with wettable flanks, integrated power-good flag, and automotive thermal range (–40°C to +150°C junction).
Technical Context
The LMR36015FSC3RNXRQ1 uses peak-current-mode control with internal compensation, enabling stable regulation across 4.2–60 V input while maintaining ±1.5% output voltage accuracy at 3.3 V. Its FPWM mode ensures constant 2.1 MHz switching regardless of load, eliminating frequency variation-induced EMI peaks.
It integrates high-side and low-side MOSFETs (RDS(on) = 225–435 mΩ / 150–280 mΩ), features a precision enable input with hysteresis (110 mV), and delivers power-good signaling with 80–200 µs deglitch delay and 90–95% lower threshold relative to FB reference-supporting robust system-level power sequencing in safety-critical automotive domains.
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 (60 V); absolute max 66 V. |
| Output Voltage | Fixed 3.3 V ±2.1% (3.23–3.37 V) - eliminates external feedback resistors, reduces BOM count and layout sensitivity. |
| Switching Frequency | 2.1 MHz (±7%) - enables use of small external inductors & capacitors; avoids AM radio band; supports compact PCB area. |
| Efficiency | 93% @ 12 VIN/5 VOUT/1 A - high light-load efficiency via PFM emulation; 26 µA quiescent current extends battery runtime. |
| Thermal Range | Junction –40°C to +150°C - qualified per AEC-Q100 Grade 1; thermal shutdown at 170°C with 12°C hysteresis. |
| EMI Performance | CISPR-25 Class 5 compliant - achieved via HotRod™ package, parallel input path, minimized switch-node ringing, and ±4% triangular spread spectrum. |
| Protection Features | Cycle-by-cycle current limit, hiccup short-circuit protection, thermal shutdown, input UVLO, and power-good flag - enables autonomous fault response without external supervision. |
Pinout & Package
LMR36015FSC3RNXRQ1 is housed in a 2.0 mm × 3.0 mm, 12-pin VQFN-HR package with wettable flanks for enhanced solder inspection and thermal performance (RθJA = 72.5°C/W, RθJB = 23.3°C/W). The package supports high-density automotive PCB layouts and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | PGND | Power ground return for input capacitor and internal FETs; must be tied to AGND and system GND with low-inductance plane. |
| 2, 10 | VIN | Main input supply (4.2–60 V); connects directly to CIN with short, wide traces to minimize parasitic inductance. |
| 3 | NC | No internal connection; used on PCB to simplify CBOOT routing from SW node - improves layout robustness. |
| 4 | BOOT | Bootstrap supply for high-side driver; requires 100-nF ceramic capacitor between BOOT and SW pins. |
| 5 | VCC | Internal 5-V LDO output; powers control circuitry; decoupled with 1-µF capacitor to AGND; not for external loading. |
| 6 | AGND | Analog ground reference for FB, EN, PG; separate from PGND but connected at single point on PCB to reduce noise coupling. |
| 7 | FB | Feedback input - internally tied to 3.3-V output; no external divider needed; must not be floated or grounded. |
| 8 | PG | Open-drain power-good flag; asserts high after soft-start when VOUT reaches 95–107% of target; requires external pull-up. |
| 9 | EN | Enable input with precise thresholds (1.157–1.3 V turn-on, 1.047–1.19 V turn-off); supports direct VIN connection or external UVLO. |
| 12 | SW | Switch node connecting internal FETs to external inductor; high dv/dt node - requires tight layout and minimal trace length. |
Key Features
| Feature | Design Value |
|---|---|
| HotRod™ VQFN-HR package | Eliminates bond wires to reduce parasitic inductance, suppresses switch-node ringing, and improves EMI performance to CISPR-25 Class 5. |
| Integrated power-good (PG) flag | Provides filtered, delay-stabilized system status indication with built-in hysteresis - removes need for external supervisor IC or RC timing network. |
| FPWM + spread spectrum | Ensures constant 2.1 MHz operation under all loads while spreading spectral energy over ±4% bandwidth to lower peak emissions by >10 dB. |
| Automotive-grade protection suite | Includes cycle-by-cycle current limit, hiccup-mode short-circuit recovery (94 ms off-time), thermal shutdown (170°C), and input UVLO - meets ASIL-B functional safety requirements. |
| Ultra-low quiescent current | 26 µA typical non-switching IQ enables always-on systems (e.g., camera wake-on-motion) without excessive battery drain. |
Applications
| ADAS Camera Module | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering image sensor, ISP, and serial interface in rear-view or surround-view cameras mounted near vehicle exterior. IC Role / Device Role / Timing Role: Primary 3.3-V power rail regulator; provides clean, low-noise, EMI-compliant supply synchronized to camera frame timing. Use Value: Fixed 3.3-V output eliminates calibration drift; 2.1-MHz FPWM avoids interference with pixel clock harmonics; HotRod™ package ensures consistent performance across –40°C to +125°C ambient. |
Use Scenario: Supplying microcontroller, CAN transceiver, and LED drivers in centralized body electronics units. IC Role / Device Role / Timing Role: Main buck converter for 3.3-V logic domain; coordinates with system enable signals and monitors power health via PG flag. Use Value: AEC-Q100 qualification guarantees lifetime reliability; power-good flag enables safe MCU reset during brownout; 60-V input withstands jump-start transients. |
| Infotainment Display Backlight | Telematics Control Unit (TCU) |
|
Use Scenario: Generating stable 3.3-V bias for display timing controller and touch interface in center-stack displays. IC Role / Device Role / Timing Role: Secondary regulated rail supporting display subsystem; interfaces with main SoC via EN and PG for coordinated power sequencing. Use Value: Low 26-µA quiescent current extends sleep-mode battery life; spread spectrum prevents visible display flicker caused by EMI coupling into analog video paths. |
Use Scenario: Powering LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Isolated 3.3-V supply with independent enable/control; PG signal feeds watchdog timer to detect power faults before communication loss. Use Value: Functional safety documentation support aids ISO 26262 ASIL-B decomposition; 150°C junction rating accommodates sealed enclosure thermal stacking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36015FSC3RNXTQ1 | Same silicon, identical electrical specs, but supplied in tape-and-reel of 250 pcs (vs. 3000 pcs for LMR36015FSC3RNXRQ1). | Identical functionality; suited for prototyping or low-volume production where smaller reels reduce inventory overhead. | Select when evaluating or qualifying the design prior to high-volume ramp; same footprint, timing, and thermal behavior. |
| LMR36015SC3QRNXRQ1 | 3.3-V fixed output, 2.1-MHz switching, but uses PFM-only mode (no FPWM) - variable frequency below ~300 mA load. | Lacks constant-frequency operation; unsuitable where EMI predictability or clock-sensitive peripherals require stable fSW. | Choose only if ultra-low light-load IQ (<18 µA) outweighs EMI and timing constraints; not drop-in compatible for FPWM-dependent designs. |
Compared with LMR36015FSC3RNXRQ1, the LMR36015FSC3RNXTQ1 offers identical performance in smaller packaging for validation, while LMR36015SC3QRNXRQ1 trades FPWM stability for marginally lower quiescent current - making the former ideal for volume production and the latter limited to non-timing-critical, ultra-low-power use cases.
Availability
LMR36015FSC3RNXRQ1 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 sourcing.
Supply support for LMR36015FSC3RNXRQ1 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 and functional safety solutions.
The LMR36015-Q1 product line delivers scalable, AEC-Q100-qualified buck converters for automotive subsystems demanding high efficiency, ultra-low EMI, and robust protection - targeting camera, radar, gateway, and body electronics applications.
FAQ
What is the output voltage configuration of the LMR36015FSC3RNXRQ1?
The LMR36015FSC3RNXRQ1 is factory-configured with a fixed 3.3-V output. It does not require external feedback resistors - the FB pin is internally connected to the output. This configuration ensures ±2.1% tolerance (3.23 V to 3.37 V) over temperature and load, simplifying design and improving long-term stability compared to adjustable variants like LMR36015AQRNXRQ1.
Does the LMR36015FSC3RNXRQ1 support constant-frequency operation across all load conditions?
Yes, the LMR36015FSC3RNXRQ1 operates in forced pulse-width modulation (FPWM) mode, maintaining a constant 2.1 MHz switching frequency from zero load up to full 1.5-A output. Unlike PFM variants, it avoids frequency foldback or discontinuous conduction mode, ensuring predictable EMI behavior and compatibility with noise-sensitive downstream circuits.
How does the power-good (PG) flag of the LMR36015FSC3RNXRQ1 behave during startup and fault conditions?
The LMR36015FSC3RNXRQ1 PG pin is an open-drain output that remains low until the output reaches 95% of 3.3 V, then transitions high after a 80–200 µs deglitch delay. It asserts low again if VOUT falls below 93% of target or during thermal shutdown, current limit, or EN deactivation - providing reliable system-level power monitoring without external components.
What package type and thermal characteristics does the LMR36015FSC3RNXRQ1 use?
The LMR36015FSC3RNXRQ1 uses the VQFN-HR (12) package - a 2.0 mm × 3.0 mm HotRod™封装 with wettable flanks. Its thermal metrics include RθJA = 72.5°C/W and RθJB = 23.3°C/W, enabling efficient heat transfer to the PCB. The package supports AEC-Q100 Grade 1 operation with junction temperatures from –40°C to +150°C.
Is spread-spectrum modulation enabled by default on the LMR36015FSC3RNXRQ1?
Yes, spread-spectrum modulation is factory-enabled on the LMR36015FSC3RNXRQ1. It operates with ±4% frequency deviation at a 16-kHz triangular repetition rate, reducing peak radiated emissions by distributing energy across a wider bandwidth - a key factor in achieving CISPR-25 Class 5 compliance without additional filtering components.
Can the LMR36015FSC3RNXRQ1 be used in non-automotive applications?
While qualified to AEC-Q100 Grade 1 and optimized for automotive environments, the LMR36015FSC3RNXRQ1's 4.2–60 V input range, 3.3-V fixed output, low EMI, and robust protection make it suitable for industrial, transportation, and harsh-environment applications - provided system-level functional safety and qualification requirements are independently validated.
LMR36015FSC3RNXRQ1 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)
LMR36015FSC3RNXRQ1 FAQ
1.How can I place an order for LMR36015FSC3RNXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36015FSC3RNXRQ1 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 LMR36015FSC3RNXRQ1 reliable?
The price and inventory of LMR36015FSC3RNXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36015FSC3RNXRQ1 is usually 5 days.
3.What payment methods are accepted for LMR36015FSC3RNXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36015FSC3RNXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36015FSC3RNXRQ1?
LMR36015FSC3RNXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36015FSC3RNXRQ1 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 LMR36015FSC3RNXRQ1?
For technical support, including LMR36015FSC3RNXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36015FSC3RNXRQ1 requirements.
6.How does Aetrix verify that LMR36015FSC3RNXRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36015FSC3RNXRQ1 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 LMR36015FSC3RNXRQ1 meets industry standards.
7.What is the process for return or replacement of LMR36015FSC3RNXRQ1?
All LMR36015FSC3RNXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36015FSC3RNXRQ1, 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 LMR36015FSC3RNXRQ1 part is unused and in its original packaging.
Return procedure for LMR36015FSC3RNXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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