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Texas Instruments LMR36015FSCQRNXRQ1
- Part No.:
- LMR36015FSCQRNXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36015FSCQRNXRQ1.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
LMR36015FSCQRNXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade 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 2.1 MHz fixed switching frequency, spread-spectrum modulation, and integrated high-side/low-side MOSFETs in a 2 mm × 3 mm VQFN-HR package. It powers ADAS camera modules with ±1.5% reference voltage tolerance and 0.4-V dropout at full load.
For engineers reviewing the LMR36015FSCQRNXRQ1 datasheet, LMR36015FSCQRNXRQ1 pinout, LMR36015FSCQRNXRQ1 application, or LMR36015FSCQRNXRQ1 equivalent, key selection considerations include its functional safety capability, CISPR25 Class 5 EMI compliance, PFM/PWM auto-mode transition, thermal shutdown at 170°C, and power-good flag with 80–200 µs deglitch delay.
Technical Context
The LMR36015FSCQRNXRQ1 uses peak-current-mode control with internal loop compensation, enabling stable regulation from 20 VIN to 5 VOUT at 2.1 MHz without external compensation components. Its HotRod™ flip-chip packaging minimizes switch-node ringing and parasitic inductance via parallel input paths and optimized bond-wire layout.
It operates in auto mode-transitioning between forced PWM (FPWM) and pulse-frequency modulation (PFM) based on load-with diode emulation for discontinuous conduction mode at light loads. The device integrates a precision enable input (1.157–1.3 V threshold), 5-V internal LDO (VCC), and open-drain power-good flag with built-in filtering and 4-ms 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 (60 V) |
| Output Current | 1.5 A continuous - sufficient for powering image sensors and microcontrollers in ADAS modules |
| Switching Frequency | 2.1 MHz (±10%) - enables compact magnetics and avoids AM radio band; spread-spectrum reduces peak EMI by ±4% |
| Reference Voltage | 1.0 V ±1.5% - sets output accuracy for adjustable configurations; enables 3.3-V fixed option with ±2.1% total output tolerance |
| Quiescent Current | 26 µA typical - maintains high light-load efficiency in always-on vehicle subsystems |
| Thermal Shutdown | 170°C shutdown / 158°C recovery - protects against sustained overload or poor PCB thermal design |
| EMI Compliance | CISPR25 Class 5 - meets stringent automotive radiated emissions requirements without added shielding |
Pinout & Package
LMR36015FSCQRNXRQ1 is housed in a 12-pin VQFN-HR (RNX) package measuring 2.00 mm × 3.00 mm with wettable flanks for automated optical inspection. Thermal performance includes RθJA = 72.5°C/W and RθJB = 23.3°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 2, 10) | Primary input power supply | Accepts 4.2–60 V; requires low-inductance connection to CIN for stable operation under transient loads |
| SW (Pin 12) | Switch node | Connects to power inductor; drives high-side/low-side MOSFETs; critical for EMI and efficiency |
| BOOT (Pin 4) | Bootstrap supply | Requires 100-nF ceramic capacitor to SW; enables high-side gate drive during duty cycles >98% |
| FB (Pin 7) | Feedback input | Senses output voltage divider; 1.0 V reference enables precise output regulation (±1.5%) |
| PG (Pin 8) | Power-good flag | Open-drain output with 80–200 µs deglitch; signals valid VOUT after soft-start and fault conditions |
| EN (Pin 9) | Enable control | Logic-level input with 1.157–1.3 V turn-on threshold; supports direct VIN connection or external UVLO |
| AGND (Pin 6) | Analog ground reference | Ground return for FB, PG, EN; must be star-connected to PGND near CIN to minimize noise coupling |
| PGND (Pins 1, 11) | Power ground | High-current return path for VIN, SW, and VCC; requires wide copper pour and multiple vias to thermal pad |
| VCC (Pin 5) | Internal 5-V LDO output | Powers internal circuitry; not for external loading; requires 1-µF bypass capacitor to AGND |
| NC (Pin 3) | No-connect | Internally unconnected; used on PCB to simplify CBOOT-to-SW routing per TI layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety-Capable | Documentation available for ISO 26262 ASIL-B system integration; supports diagnostic coverage for power-good, thermal, and overcurrent faults |
| HotRod™ Packaging | Flip-chip construction eliminates bond wires, reducing switch-node ringing and enabling >93% efficiency at 12 VIN/5 VOUT/1 A |
| Auto PFM/PWM Mode | Seamless transition preserves >85% efficiency down to 1 mA load; eliminates audible noise in PFM mode |
| Hiccup Short-Circuit Protection | 94-ms off-time limits average power dissipation during hard shorts, preventing thermal runaway at 150°C ambient |
| Integrated Power-Good Flag | Eliminates need for external supervisor IC; provides system reset signal with programmable delay via external RC on PG |
Applications
| ADAS Camera Module | Body Control Module |
|---|---|
Use Scenario: Powers 5-MP CMOS image sensor and companion MCU in rear-view or surround-view camera systems operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Primary 3.3-V or adjustable buck regulator supplying sensor analog core, digital I/O, and ISP logic rails. Use Value: Meets CISPR25 Class 5 EMI limits without ferrite beads or shielding, preserving board space and BOM cost in tight camera housings. | Use Scenario: Supplies 5-V logic rail for door module microcontrollers managing window lift, mirror fold, and lighting functions. IC Role / Device Role / Timing Role: Main power converter for distributed body electronics; handles cold-crank (4.2 V) and load-dump (60 V) transients. Use Value: 26 µA quiescent current extends battery life during vehicle sleep mode; thermal shutdown prevents field failures in sealed enclosures. |
| Infotainment Display Backlight | Automotive Telematics Unit |
Use Scenario: Generates 5-V bias for LED driver ICs in 10.25-inch digital instrument cluster displays. IC Role / Device Role / Timing Role: Intermediate bus converter stepping down 12-V battery to clean 5-V rail for display timing controller and backlight PWM generator. Use Value: 2.1-MHz switching enables use of 1-µH inductors, reducing solution size by 40% vs. 400-kHz alternatives while maintaining <10-mVPP ripple. | Use Scenario: Powers LTE modem, GNSS receiver, and secure MCU in cellular-connected telematics control units (TCUs). IC Role / Device Role / Timing Role: High-reliability primary DC/DC regulator supporting ASIL-B functional safety requirements for OTA updates and emergency call (eCall) functions. Use Value: AEC-Q100 Grade 1 qualification and documented functional safety analysis reduce validation effort for ISO 26262-compliant TCU designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36006FSCQRNXRQ1 | Same pinout, 60-V input, but rated for 0.6-A output current; lower RDS(on) (HS: 180 mΩ, LS: 120 mΩ); identical 2.1-MHz FPWM operation | Targeted at lower-power sensors or auxiliary rails where 1.5-A headroom is unnecessary | Select when output current demand is ≤0.6 A and board space reuse is critical |
| LMR33620FSCQRNXRQ1 | 36-V max input, 2-A output, same 2.1-MHz FPWM and spread-spectrum; different thermal metrics (RθJA = 62.3°C/W) | Optimized for 12-V systems with higher current needs, such as radar front-ends or gateway ECUs | Select when input voltage never exceeds 36 V and ≥2-A output is required |
Compared with LMR36006FSCQRNXRQ1 and LMR33620FSCQRNXRQ1, the LMR36015FSCQRNXRQ1 uniquely balances 60-V input capability, 1.5-A output, and ultra-small footprint-making it optimal for space-constrained 48-V or wide-input ADAS nodes where neither 0.6-A nor 36-V-limited alternatives suffice.
Availability
LMR36015FSCQRNXRQ1 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, body control units, and infotainment displays requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LMR36015FSCQRNXRQ1 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 ultra-small, high-efficiency synchronous buck converters designed specifically for demanding automotive applications including ADAS, body electronics, and infotainment-prioritizing EMI performance, thermal robustness, and ASIL-ready safety features.
FAQ
What is the maximum input voltage rating for the LMR36015FSCQRNXRQ1?
The LMR36015FSCQRNXRQ1 has an absolute maximum input voltage rating of 66 V and a recommended operating input voltage range of 4.2 V to 60 V. This allows it to withstand automotive load-dump transients up to 60 V while maintaining regulation, with 66 V representing the non-operational stress limit per AEC-Q100 reliability testing.
Does the LMR36015FSCQRNXRQ1 support fixed-output voltage configurations?
Yes, the LMR36015FSCQRNXRQ1 supports both adjustable and fixed-output variants. While the LMR36015FSCQRNXRQ1 itself is adjustable (requiring external feedback resistors), TI offers pin-compatible fixed-output versions including LMR36015FSC3RNXTQ1 (3.3 V, 250-unit reel) and LMR36015FSC3RNXRQ1 (3.3 V, 3000-unit tape). All share identical 2.1-MHz FPWM and spread-spectrum features.
How does the power-good (PG) flag behave during startup and fault conditions for the LMR36015FSCQRNXRQ1?
The LMR36015FSCQRNXRQ1 PG pin asserts high after a typical 4-ms delay following EN assertion, provided FB voltage reaches 105% of target. It deasserts low during thermal shutdown, current-limit hiccup, or if FB falls below 93% of target. With EN low, PG remains valid down to 2 V input and is forced low regardless of output state.
What thermal metrics apply to the LMR36015FSCQRNXRQ1 in its VQFN-HR package?
The LMR36015FSCQRNXRQ1 in the 12-pin VQFN-HR (RNX) package has RθJA = 72.5°C/W, RθJB = 23.3°C/W, and RθJC(top) = 35.9°C/W. These values assume JEDEC-standard PCB layout with 2 oz copper, 1-in² thermal pad, and 4 thermal vias-critical for sustaining 1.5-A output at 125°C ambient in automotive under-hood environments.
Is the LMR36015FSCQRNXRQ1 compatible with WEBENCH® Power Designer?
Yes, the LMR36015FSCQRNXRQ1 is fully supported in TI's WEBENCH® Power Designer tool. Engineers can generate complete schematic and bill-of-materials, simulate transient response and efficiency, optimize loop compensation, and export design files directly-leveraging validated models for the 2.1-MHz FPWM variant with spread spectrum enabled.
LMR36015FSCQRNXRQ1 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):
- 60V
- 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)
LMR36015FSCQRNXRQ1 FAQ
1.How can I place an order for LMR36015FSCQRNXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36015FSCQRNXRQ1 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 LMR36015FSCQRNXRQ1 reliable?
The price and inventory of LMR36015FSCQRNXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36015FSCQRNXRQ1 is usually 5 days.
3.What payment methods are accepted for LMR36015FSCQRNXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36015FSCQRNXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36015FSCQRNXRQ1?
LMR36015FSCQRNXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36015FSCQRNXRQ1 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 LMR36015FSCQRNXRQ1?
For technical support, including LMR36015FSCQRNXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36015FSCQRNXRQ1 requirements.
6.How does Aetrix verify that LMR36015FSCQRNXRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36015FSCQRNXRQ1 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 LMR36015FSCQRNXRQ1 meets industry standards.
7.What is the process for return or replacement of LMR36015FSCQRNXRQ1?
All LMR36015FSCQRNXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36015FSCQRNXRQ1, 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 LMR36015FSCQRNXRQ1 part is unused and in its original packaging.
Return procedure for LMR36015FSCQRNXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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