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Texas Instruments LMR36015FSC3RNXTQ1
- Part No.:
- LMR36015FSC3RNXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36015FSC3RNXTQ1.pdf
- Description:
- IC REG BUCK 3.3V 1.5A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:957
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Product details
Overview
LMR36015FSC3RNXTQ1 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 - used in ADAS camera modules for compact, low-noise power rail generation.
For engineers reviewing the LMR36015FSC3RNXTQ1 datasheet, LMR36015FSC3RNXTQ1 pinout, LMR36015FSC3RNXTQ1 application, or LMR36015FSC3RNXTQ1 equivalent, key selection considerations include its 3.3-V fixed output, HotRod™ VQFN-HR (12) package with wettable flanks, ±1.5% reference tolerance, 26-µA quiescent current in PFM mode, and functional safety documentation support.
Technical Context
The LMR36015FSC3RNXTQ1 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% output accuracy. It automatically transitions between PWM (heavy load) and PFM (light load) modes to sustain >93% efficiency at 1 A and 26 µA IQ in non-switching state.
Its HotRod™ flip-chip VQFN-HR package minimizes parasitic inductance and switch-node ringing, supporting CISPR-25 Class 5 compliance via parallel input paths, built-in spread spectrum (±4% frequency dither), and optimized layout for ultra-low EMI in space-constrained 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 (66 V absolute max). |
| Output Voltage | Fixed 3.3 V (3.23–3.37 V) - eliminates external feedback resistors; ±1.5% tolerance ensures reliable logic-level rail for microcontrollers and image sensors. |
| Switching Frequency | 2.1 MHz (1.95–2.35 MHz) - enables use of small 1–2.2 µH inductors and avoids AM radio band; supports compact PCB layout. |
| Quiescent Current | 26 µA (typ.) in PFM mode - extends battery life in always-on ADAS systems without compromising startup responsiveness. |
| Thermal Protection | 170°C shutdown / 158°C recovery - prevents thermal runaway during sustained overload or poor heatsinking in sealed enclosures. |
| EMI Performance | CISPR-25 Class 5 compliant - meets stringent automotive radiated emissions requirements without added shielding or filters. |
| Power-Good Flag | Open-drain PG with 80–200 µs deglitch delay and 93–95% / 105–107% thresholds - provides robust system reset signaling independent of EN state. |
Pinout & Package
LMR36015FSC3RNXTQ1 is housed in a 2.00 mm × 3.00 mm VQFN-HR (12-pin) package with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 2, 10) | Main input power supply | Accepts 4.2–60 V; requires low-inductance connection to CIN for transient immunity and EMI control. |
| PGND (Pins 1, 11) | Power ground return | Must be connected directly to AGND and CIN ground plane with short, wide traces to minimize current-loop area. |
| EN (Pin 9) | Enable control input | Logic-compatible threshold (1.157–1.3 V); supports direct VIN tie or precision UVLO via resistor divider. |
| BOOT (Pin 4) | High-side gate driver supply | Requires 100-nF ceramic capacitor to SW; critical for MOSFET turn-on strength and efficiency at high duty cycles. |
| SW (Pin 12) | Switch node | Connects to power inductor; high di/dt node - must be routed with minimal length and area to reduce EMI. |
| FB (Pin 7) | Feedback reference input | Internally tied to 3.3 V output; not externally configurable - simplifies design and improves noise immunity. |
| AGND (Pin 6) | Analog ground reference | Ground for internal references and error amplifier; must be star-connected to PGND near device for stability. |
| PG (Pin 8) | Power-good status flag | Open-drain output; requires external pull-up; asserts high only after soft-start completes and VOUT is within regulation window. |
| VCC (Pin 5) | Internal 5-V LDO output | Supplies internal circuitry; decoupled with 1-µF capacitor; not intended for external loads. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; PCB trace may connect SW to NC to simplify CBOOT routing per TI layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated HotRod™ MOSFETs | Reduces conduction losses and eliminates external FET layout complexity; RDS(on)HS = 225–435 mΩ, RDS(on)LS = 150–280 mΩ. |
| Spread-spectrum modulation | ±4% frequency dither at 16 kHz repetition rate lowers peak EMI by >10 dB, easing CISPR-25 Class 5 certification. |
| Auto PFM/PWM transition | Maintains >85% efficiency down to 1 mA load without external bias circuits - ideal for intermittent-sensing applications. |
| Robust protection suite | Includes cycle-by-cycle current limit, hiccup-mode short-circuit response (94 ms off-time), thermal shutdown, and input UVLO. |
| Functional safety documentation | Provides FIT rate data, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B system integration. |
Applications
| ADAS Camera Module | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers CMOS image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings exposed to temperature extremes and EMI. IC Role / Device Role / Timing Role: Primary 3.3-V power rail regulator with fast transient response and low noise to prevent image artifacts and sensor reset glitches. Use Value: 2.1-MHz operation avoids interference with video clock harmonics; CISPR-25 Class 5 compliance eliminates need for ferrite beads or shielded inductors. | Use Scenario: Supplies microcontroller, CAN transceiver, and LED drivers in centralized vehicle body electronics with variable load profiles. IC Role / Device Role / Timing Role: Always-on buck converter providing stable 3.3-V logic rail during sleep/wake cycles and battery voltage fluctuations. Use Value: 26-µA quiescent current extends battery hold-up time; AEC-Q100 Grade 1 qualification ensures operation from –40°C to +125°C ambient. |
| Infotainment Display Backlight | Automotive Telematics Unit |
Use Scenario: Generates 3.3-V bias for display timing controller and touch interface ICs in center-stack LCD clusters. IC Role / Device Role / Timing Role: Secondary regulated supply derived from 12-V battery; synchronized to avoid beat frequencies with display pixel clocks. Use Value: Small 2 mm × 3 mm footprint saves board space behind dense display assemblies; wettable flanks enable AOI for zero-defect manufacturing. | Use Scenario: Powers LTE modem, GNSS receiver, and secure element in cellular-connected telematics control units requiring high reliability. IC Role / Device Role / Timing Role: Main system power regulator with power-good monitoring to coordinate safe boot and firmware update sequencing. Use Value: PG flag with 80–200 µs deglitching prevents false resets during RF transmit bursts; functional safety documentation supports ASIL-B decomposition. |
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 | Adjustable output (via FB divider); same 2.1-MHz, spread-spectrum, FPWM architecture. | Used where multiple output voltages are needed on same platform; requires two external resistors. | Select when flexibility in output voltage is required; not drop-in for fixed 3.3-V designs. |
| LMR33620QRNXTQ1 | 36-V max input, 2-A output, same VQFN-HR package; no spread spectrum; 400-kHz/2.1-MHz selectable. | Suitable for lower-voltage subsystems (e.g., infotainment core rails); higher current but narrower VIN range. | Choose for cost-sensitive 12-V systems needing >1.5 A; verify EMI compliance separately if Class 5 required. |
Compared with LMR36015FSC3RNXTQ1, the adjustable LMR36015FSCQRNXTQ1 offers voltage flexibility at the cost of BOM count and layout area, while the LMR33620QRNXTQ1 trades input voltage range and EMI features for higher output current in less demanding EMC environments.
Availability
LMR36015FSC3RNXTQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, body control modules, and telematics units requiring stable component supply under AEC-Q100 automotive qualification and long-term production continuity.
Supply support for LMR36015FSC3RNXTQ1 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, embedded processing, and automotive-grade power management ICs with over 40 years of automotive qualification experience.
The LMR36015-Q1 product line delivers ultra-small, high-efficiency synchronous buck regulators optimized for space-constrained, EMI-sensitive automotive subsystems such as vision systems and domain controllers.
FAQ
What is the maximum input voltage rating for the LMR36015FSC3RNXTQ1?
The LMR36015FSC3RNXTQ1 has an absolute maximum input voltage rating of 66 V, with recommended operating range from 4.2 V to 60 V. This allows robust operation during automotive load-dump events and cold-crank conditions. The 60-V upper limit ensures reliable performance across 12-V and 24-V vehicle architectures while maintaining thermal margin and efficiency.
Does the LMR36015FSC3RNXTQ1 require external feedback resistors for its 3.3-V output?
No, the LMR36015FSC3RNXTQ1 is a fixed-output variant with internal feedback network configured for 3.3 V. The FB pin is internally connected to the output, eliminating the need for external resistors and reducing component count, layout area, and potential drift sources. This simplifies design validation and improves long-term output accuracy versus adjustable counterparts.
How does the power-good (PG) flag behave during startup and fault conditions for the LMR36015FSC3RNXTQ1?
The LMR36015FSC3RNXTQ1 PG flag remains low until output voltage reaches 105–107% of nominal (3.465–3.531 V) after soft-start completes (~4 ms). It asserts high only when VOUT stays within 93–95% to 105–107% of 3.3 V for ≥80 µs. During faults (overload, short, thermal shutdown) or EN deactivation, PG goes low with ≤200 µs delay, providing deterministic system reset signaling.
Can the LMR36015FSC3RNXTQ1 operate efficiently at very light loads typical in automotive standby modes?
Yes, the LMR36015FSC3RNXTQ1 automatically enters PFM mode below ~100 mA load, reducing switching frequency and achieving 26 µA typical quiescent current. This maintains >85% efficiency at 1 mA output, extending battery life in always-on vehicle subsystems like intrusion detection or remote keyless entry receivers without requiring external bias networks.
Is the LMR36015FSC3RNXTQ1 pin-compatible with other devices in the LMR360xx-Q1 family?
Yes, the LMR36015FSC3RNXTQ1 shares the same 12-pin VQFN-HR (2 mm × 3 mm) package and pinout with all LMR360xx-Q1 variants, including LMR36006-Q1 (0.6 A), LMR36015AQRNXTQ1 (adjustable), and LMR33620/30-Q1 (36-V, 2/3 A). This enables scalable power supply design and PCB reuse across different current and voltage requirements within automotive platforms.
LMR36015FSC3RNXTQ1 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)
LMR36015FSC3RNXTQ1 FAQ
1.How can I place an order for LMR36015FSC3RNXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36015FSC3RNXTQ1 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 LMR36015FSC3RNXTQ1 reliable?
The price and inventory of LMR36015FSC3RNXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36015FSC3RNXTQ1 is usually 5 days.
3.What payment methods are accepted for LMR36015FSC3RNXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36015FSC3RNXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36015FSC3RNXTQ1?
LMR36015FSC3RNXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36015FSC3RNXTQ1 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 LMR36015FSC3RNXTQ1?
For technical support, including LMR36015FSC3RNXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36015FSC3RNXTQ1 requirements.
6.How does Aetrix verify that LMR36015FSC3RNXTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36015FSC3RNXTQ1 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 LMR36015FSC3RNXTQ1 meets industry standards.
7.What is the process for return or replacement of LMR36015FSC3RNXTQ1?
All LMR36015FSC3RNXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36015FSC3RNXTQ1, 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 LMR36015FSC3RNXTQ1 part is unused and in its original packaging.
Return procedure for LMR36015FSC3RNXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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