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Texas Instruments LMR36506MSCQRPERQ1
- Part No.:
- LMR36506MSCQRPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36506MSCQRPERQ1.pdf
- Description:
- IC REG BUCK ADJ 600MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,233
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Product details
Overview
LMR36506MSCQRPERQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 3-V to 65-V, 0.6-A synchronous buck DC/DC converter in a 2-mm × 2-mm HotRod™ VQFN-HR package. It delivers >80% efficiency at 1 mA load, features 4 µA switching quiescent current at 24 VIN/3.3 VOUT, supports adjustable output voltage via FB pin, and includes PGOOD flag and MODE/SYNC pin for external clock synchronization - optimized for automotive cold-crank operation in ADAS and infotainment systems.
For engineers reviewing the LMR36506MSCQRPERQ1 datasheet, LMR36506MSCQRPERQ1 pinout, LMR36506MSCQRPERQ1 application, or LMR36506MSCQRPERQ1 equivalent, key selection considerations include its 2.2 MHz fixed switching frequency (MODE/SYNC variant), pseudo-random spread spectrum EMI reduction, –40°C to +150°C junction temperature range, and compatibility with minimal external components including no need for external compensation.
Technical Context
The LMR36506MSCQRPERQ1 uses peak current mode control with internal compensation, enabling stable regulation with minimal output capacitance. Its MODE/SYNC pin supports user-selectable PFM/FPWM operation and synchronization to an external clock between 0.2 MHz and 2.2 MHz.
It integrates high-side and low-side MOSFETs with RDS(on) of 560–920 mΩ and 280–460 mΩ respectively, implements soft-start (2.58 ms typical), thermal shutdown (158–180°C rising), and precision PGOOD with ±1.8% hysteresis referenced to FB voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V (falling) to 65 V - sustains regulation during automotive cold-crank transients down to 2.45 V |
| Output Current | 0.6 A continuous - supports power rails for microcontrollers, sensors, and interface ICs in automotive ECUs |
| Switching Frequency | Fixed 2.2 MHz - enables compact magnetics and avoids AM band interference |
| IQ (Switching) | 4 µA at 24 VIN/3.3 VOUT - extends battery life in always-on vehicle modules |
| PGOOD Accuracy | ±1.8% hysteresis window around FB reference - eliminates need for external supervisor IC |
| Junction Temp Range | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood deployment |
| Package | VQFN-HR (9-pin, 2.0 mm × 2.0 mm) with wettable flanks - enables automated optical inspection and robust solder joints |
Pinout & Package
VQFN-HR (9-pin, 2.0 mm × 2.0 mm) package with wettable flanks and corner anchor pins for enhanced board-level reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE/SYNC | Control input | Selects PFM/FPWM mode or synchronizes to external clock (0.2–2.2 MHz); must not be floated |
| 2 - PGOOD | Open-drain output | Indicates regulated output status; active-low, requires pull-up resistor; goes low when EN = low |
| 3 - EN/UVLO | Enable input | High = ON (threshold 1.263 V), low = OFF; supports direct connection to VIN; includes 0.35 V hysteresis |
| 4 - VIN | Power input | Primary input supply (3–65 V); requires local high-quality bypass capacitor to GND |
| 5 - SW | Power switch node | Connects to external inductor; carries high di/dt switching current; layout critical for EMI |
| 6 - BOOT | Bootstrap supply | Supplies gate drive for high-side FET; requires 100-nF ceramic capacitor to SW pin |
| 7 - VCC | Internal LDO output | 3.15 V internal bias rail; powers control circuitry; decouple with 1-µF capacitor to GND |
| 8 - FB | Feedback input | Adjusts output voltage via resistor divider; reference = 1.0 V; input current = 110 nA max |
| 9 - GND | Power ground | System ground return; connect CIN with short, wide traces; ties to thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Pseudo-random spread spectrum | ±2% frequency dithering reduces peak EMI emissions to meet CISPR 25 Class 5 |
| Integrated soft-start | 2.58 ms typical ramp time prevents inrush current and stabilizes startup without external components |
| Thermal shutdown protection | 158°C trip with 10°C hysteresis ensures safe operation during overload or poor airflow |
| Ultra-low IQ in PFM mode | 4 µA at 24 VIN/3.3 VOUT enables >80% efficiency at 1 mA load for always-on subsystems |
| HotRod™ flip-chip packaging | No bond wires reduce parasitic inductance, improving EMI performance and enabling 2-mm × 2-mm footprint |
Applications
| Advanced Driver Assistance Systems (ADAS) | Body Electronics and Lighting |
|---|---|
Use Scenario: Powering radar sensor SoCs and camera image signal processors in front-end collision avoidance modules. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V point-of-load regulator delivering clean, regulated power with fast transient response. Use Value: Withstands 70-V load dump transients and maintains regulation during 3-V cold-crank events without brownout. | Use Scenario: Supplying LED driver ICs and LIN transceivers in door modules and ambient lighting controllers. IC Role / Device Role / Timing Role: Compact, efficient step-down converter replacing discrete LDOs and larger buck solutions. Use Value: 2-mm × 2-mm footprint saves PCB area; spread spectrum minimizes conducted EMI into sensitive analog lighting circuits. |
| Infotainment and Cluster | Telematics Control Units (TCUs) |
Use Scenario: Generating 1.2-V core and 3.3-V I/O rails for application processors and display interfaces in digital instrument clusters. IC Role / Device Role / Timing Role: Synchronous buck regulator with PGOOD signaling system reset and sequencing logic. Use Value: Integrated PGOOD eliminates external supervisor; MODE/SYNC allows synchronization to system clock for deterministic noise placement. | Use Scenario: Providing isolated 5-V and 3.3-V supplies for cellular modems, GNSS receivers, and CAN FD transceivers in vehicle connectivity modules. IC Role / Device Role / Timing Role: High-input-voltage buck converter supporting dual-rail generation with minimal BOM count. Use Value: Internal compensation and fixed 2.2-MHz operation reduce design cycle time; AEC-Q100 qualification ensures long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36506MSC5RPERQ1 | 5-V fixed output; same MODE/SYNC pin, 2.2-MHz frequency, spread spectrum | Eliminates feedback resistors but lacks output adjustability | Select when fixed 5-V rail is required and FB network simplification is prioritized |
| LMR36503MSCQRPERQ1 | Same pinout and MODE/SYNC functionality, but rated for 0.3-A output current and 65-V input | Lower current capacity limits use in higher-power domains like ADAS radar | Choose only for space-constrained 300-mA applications where footprint compatibility is critical |
Compared with LMR36506MSC5RPERQ1, the LMR36506MSCQRPERQ1 offers output voltage flexibility at identical EMI and thermal performance; versus LMR36503MSCQRPERQ1, it doubles output current capability while retaining pin compatibility - making it the optimal upgrade path for scaling power delivery without layout changes.
Availability
LMR36506MSCQRPERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), body electronics and lighting, and infotainment and cluster applications requiring stable component supply across automotive production lifecycles.
Supply support for LMR36506MSCQRPERQ1 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 consumer markets.
The LMR36506MSCQRPERQ1 belongs to TI's LMR365x0-Q1 family of automotive-grade buck converters, designed specifically to simplify power design in harsh automotive environments through integrated features, small footprint, and AEC-Q100 compliance.
FAQ
What is the maximum input voltage rating for the LMR36506MSCQRPERQ1?
The LMR36506MSCQRPERQ1 has an absolute maximum input voltage rating of 70 V and a recommended operating input voltage range from 3.0 V (falling threshold) to 65 V. This enables reliable operation during automotive load-dump events and deep cold-crank conditions down to 2.45 V, making it suitable for 12-V and 24-V vehicle electrical systems.
Does the LMR36506MSCQRPERQ1 require external compensation components?
No, the LMR36506MSCQRPERQ1 features internal compensation optimized for stability with minimal output capacitance. This eliminates the need for external Type II or Type III compensation networks, reducing BOM count and simplifying layout - especially beneficial in space-constrained automotive modules where PCB area is at a premium.
How does the MODE/SYNC pin function on the LMR36506MSCQRPERQ1?
The MODE/SYNC pin on the LMR36506MSCQRPERQ1 serves dual functions: it selects between PFM (light-load efficiency) and FPWM (fixed-frequency) modes, and accepts an external clock signal (0.2–2.2 MHz) for synchronization. This enables deterministic EMI placement and eliminates beat frequencies in multi-rail systems - critical for meeting CISPR 25 radiated emission limits in automotive applications.
What is the purpose of the PGOOD pin on the LMR36506MSCQRPERQ1?
The PGOOD pin on the LMR36506MSCQRPERQ1 provides an open-drain power-good flag indicating valid output regulation. It asserts high when VOUT is within ±1.8% of target (referenced to FB voltage), with built-in 25-µs glitch filtering. This eliminates the need for external supervisor ICs in most automotive applications, reducing cost and board space while ensuring precise system power sequencing.
Is the LMR36506MSCQRPERQ1 compatible with standard reflow soldering processes?
Yes, the LMR36506MSCQRPERQ1 uses a VQFN-HR package with wettable flanks and is qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Its corner anchor pins and copper-exposed thermal pad ensure robust solder joint formation and reliable thermal transfer - validated for automotive production environments with IPC-A-610 Class 3 acceptance criteria.
LMR36506MSCQRPERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-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):
- 3V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 65V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (2x2)
LMR36506MSCQRPERQ1 FAQ
1.How can I place an order for LMR36506MSCQRPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36506MSCQRPERQ1 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 LMR36506MSCQRPERQ1 reliable?
The price and inventory of LMR36506MSCQRPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36506MSCQRPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR36506MSCQRPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36506MSCQRPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36506MSCQRPERQ1?
LMR36506MSCQRPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36506MSCQRPERQ1 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 LMR36506MSCQRPERQ1?
For technical support, including LMR36506MSCQRPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36506MSCQRPERQ1 requirements.
6.How does Aetrix verify that LMR36506MSCQRPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36506MSCQRPERQ1 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 LMR36506MSCQRPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR36506MSCQRPERQ1?
All LMR36506MSCQRPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36506MSCQRPERQ1, 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 LMR36506MSCQRPERQ1 part is unused and in its original packaging.
Return procedure for LMR36506MSCQRPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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