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Texas Instruments LMR36506MSC3RPERQ1
- Part No.:
- LMR36506MSC3RPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36506MSC3RPERQ1.pdf
- Description:
- IC REG BUCK 3.3V 600MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:953
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Product details
Overview
LMR36506MSC3RPERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade synchronous buck converter delivering 0.6 A at fixed 3.3 V output, operating from 3.0 V to 65 V input, with 4 µA quiescent current in switching mode (VIN = 24 V → VOUT = 3.3 V), integrated PGOOD flag, and 2.2 MHz fixed-frequency FPWM operation - used in ADAS power rails requiring cold-crank resilience and low EMI.
For engineers reviewing the LMR36506MSC3RPERQ1 datasheet, LMR36506MSC3RPERQ1 pinout, LMR36506MSC3RPERQ1 application, or LMR36506MSC3RPERQ1 equivalent, key selection criteria include its 2-mm × 2-mm HotRod™ VQFN-HR package with wettable flanks, ±1.5% output voltage accuracy over full load/temperature, pseudo-random spread spectrum compliance with CISPR 25, and seamless PFM-to-FPWM transition for ultra-low-light-load efficiency.
Technical Context
The LMR36506MSC3RPERQ1 employs peak current-mode control with internal compensation, enabling stable regulation with minimal external output capacitance. Its fixed 3.3 V output variant uses factory-trimmed VOUT/BIAS pin configuration and eliminates external feedback resistors.
It integrates a high-side MOSFET (RDS(on) = 560–920 mΩ) and low-side MOSFET (RDS(on) = 280–460 mΩ), supports thermal shutdown (158–180 °C rising threshold), and features a dedicated MODE/SYNC pin for external clock synchronization or PFM/FPWM mode selection - all within a junction temperature range of –40 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V (falling) to 65 V - sustains regulation during automotive cold-crank (down to 3.0 V) and load-dump transients (up to 70 V absolute max). |
| Output Voltage | Fixed 3.3 V ±1.5% - factory-trimmed, no external feedback divider required; enables compact layout and reduced BOM count. |
| Max Output Current | 0.6 A continuous - supported across full temperature range with appropriate PCB thermal design per RθJB = 26.1 °C/W. |
| Quiescent Current | 4 µA (switching, VIN = 24 V → 3.3 V) - enables >80% efficiency at 1 mA load, critical for always-on automotive modules. |
| Switching Frequency | Fixed 2.2 MHz - avoids AM-band interference, allows use of small 1-µH inductors and ceramic capacitors. |
| EMI Mitigation | Pseudo-random spread spectrum (±2% frequency dither) - meets CISPR 25 Class 5 without common-mode chokes or shielding. |
| Package | VQFN-HR (RPE), 9-pin, 2.0 mm × 2.0 mm with wettable flanks - supports automated optical inspection and robust solder joint reliability. |
Pinout & Package
VQFN-HR (RPE) 9-pin, 2.0 mm × 2.0 mm package with wettable flanks and corner anchor pads for enhanced mechanical reliability in automotive vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MODE/SYNC | User-selectable PFM/FPWM mode or external clock synchronization input - must not be floated; pulled to VCC or GND for fixed behavior. |
| 2 | PGOOD | Open-drain power-good flag - signals valid output voltage (±1.8% hysteresis); eliminates need for external supervisor IC. |
| 3 | EN/UVLO | Enable input with precision wake-up (0.4 V) and hysteresis (0.35 V) - supports direct connection to VIN for simple on/off control. |
| 4 | VIN | Main input supply (3–65 V) - requires local high-quality bypass capacitor directly to GND for stability and EMI suppression. |
| 5 | SW | Switch node - connects to power inductor; carries high di/dt; requires short, low-inductance routing. |
| 6 | BOOT | Bootstrap supply for high-side driver - requires 100-nF ceramic capacitor between BOOT and SW for gate drive integrity. |
| 7 | VCC | Internal LDO output (3.15 V typical) - powers control circuitry; decoupled with 1-µF capacitor to GND; not for external loads. |
| 8 | VOUT/BIAS | Fixed 3.3 V output node - factory-trimmed; connects directly to output capacitor; serves as bias reference for internal circuits. |
| 9 | GND | Power ground - primary return path; must connect to CIN with short, wide traces to minimize noise and improve thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PGOOD with delayed release | Eliminates external reset supervisor IC and associated timing components in automotive power sequencing. |
| Ultra-low IQ in PFM mode | 6.5 µA input supply current at 0 A load (VIN = 13.5 V → 3.3 V), extending battery life in always-on systems. |
| HotRod™ flip-chip packaging | Removes bond wires to reduce parasitic inductance, improving EMI performance and enabling smaller solution size. |
| Internal compensation | Reduces external component count to only inductor, input/output capacitors, and BOOT capacitor - simplifies design validation. |
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to +125 °C ambient operation with full functionality up to +150 °C junction temperature. |
Applications
| ADAS Camera Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Powers image sensor and ISP in forward-facing camera module subjected to cold-crank (3.0 V) and load-dump (65 V) events. IC Role / Device Role / Timing Role: Primary 3.3 V point-of-load regulator with PGOOD signaling to SoC for safe boot sequence initiation. Use Value: Maintains regulation during 100 ms cold-crank dips; 4 µA IQ prevents battery drain during parking mode. |
Use Scenario: Supplies microcontroller, CAN transceiver, and LED drivers in door module with variable load profiles. IC Role / Device Role / Timing Role: Fixed-output buck converter with MODE/SYNC pin synchronized to system clock to reduce beat-frequency EMI. Use Value: Spread spectrum + synchronization lowers peak radiated emissions by >10 dBµV/m vs. fixed-frequency operation. |
| Infotainment Display Backlight Bias | Automotive HVAC Controller |
|
Use Scenario: Generates stable 3.3 V rail for display interface logic and touch controller in center-stack infotainment unit. IC Role / Device Role / Timing Role: Compact, low-noise DC/DC source replacing linear regulator to improve thermal margin and efficiency. Use Value: 2-mm × 2-mm footprint saves >40% board area vs. comparable SOIC-8 solutions; wettable flanks enable AOI verification. |
Use Scenario: Powers MCU, sensors, and motor drivers in climate control unit exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability buck converter with thermal shutdown (158 °C rising) and 150 °C max junction rating. Use Value: Sustains operation at +125 °C ambient with derated output current; RθJB = 26.1 °C/W supports conduction cooling. |
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 | Fixed 5 V output instead of 3.3 V; identical pinout, package, and electrical specs otherwise. | Used where 5 V logic or interface power is required instead of 3.3 V - no change to PCB layout or thermal design. | Select when system requires 5 V rail; shares same qualification, EMI profile, and footprint as LMR36506MSC3RPERQ1. |
| LMR36503MSC3RPERQ1 | Lower 0.3 A output current rating; same 3.3 V fixed output, 2.2 MHz, and VQFN-HR package. | Suitable for lower-power nodes (e.g., sensor interfaces) where 0.6 A headroom is unnecessary. | Choose for cost-sensitive, low-current applications; pin-compatible but not a functional replacement for 0.6 A loads. |
Compared with LMR36506MSC5RPERQ1, the LMR36506MSC3RPERQ1 delivers identical performance at 3.3 V, avoiding level-shifting overhead; versus LMR36503MSC3RPERQ1, it provides double the current capacity while maintaining identical board space and thermal interface requirements.
Availability
LMR36506MSC3RPERQ1 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, automotive qualification, and long-term production continuity.
Supply support for LMR36506MSC3RPERQ1 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 designing analog and embedded processing chips for industrial, automotive, and consumer applications, with leadership in power management innovation.
The LMR36506MSC3RPERQ1 belongs to TI's LMR365xx-Q1 family of automotive-grade buck converters, engineered specifically for space-constrained, EMI-sensitive automotive subsystems requiring high light-load efficiency and cold-crank resilience.
FAQ
What is the maximum input voltage the LMR36506MSC3RPERQ1 can withstand?
The LMR36506MSC3RPERQ1 has an absolute maximum input voltage rating of 70 V, with recommended operating 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 3.0 V, making it suitable for 12 V and 24 V vehicle architectures.
Does the LMR36506MSC3RPERQ1 require external feedback resistors for its 3.3 V output?
No, the LMR36506MSC3RPERQ1 is a fixed 3.3 V output variant with factory-trimmed internal reference and VOUT/BIAS pin configuration. It does not require external feedback resistors, reducing component count, layout complexity, and potential tolerance drift - unlike adjustable versions that use the FB pin.
How does the MODE/SYNC pin function on the LMR36506MSC3RPERQ1?
On the LMR36506MSC3RPERQ1, the MODE/SYNC pin enables user-selectable PFM/FPWM operation or synchronization to an external clock signal (0.2–2.2 MHz). It must not be left floating; tying to VCC selects FPWM mode, grounding selects PFM mode, and applying a clean square wave synchronizes switching frequency to the external source.
What thermal performance can be expected from the LMR36506MSC3RPERQ1 in a standard 4-layer PCB?
In a JEDEC-standard 4-layer PCB, the LMR36506MSC3RPERQ1 achieves RθJB = 26.1 °C/W (junction-to-board) and RθJA = 84.4 °C/W (junction-to-ambient). With proper copper pour and thermal vias under the exposed pad, it sustains 0.6 A continuous output at +85 °C ambient without derating - validated per AEC-Q100 thermal test conditions.
Is the LMR36506MSC3RPERQ1 pin-compatible with other devices in the LMR365xx-Q1 family?
Yes, the LMR36506MSC3RPERQ1 shares identical VQFN-HR (RPE) 9-pin 2.0 mm × 2.0 mm package and pinout with LMR36506MSC5RPERQ1 (5 V fixed) and LMR36503MSC3RPERQ1 (3.3 V, 0.3 A), enabling drop-in replacement for voltage or current scaling - though current capability must be verified per application load requirements.
LMR36506MSC3RPERQ1 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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)
LMR36506MSC3RPERQ1 FAQ
1.How can I place an order for LMR36506MSC3RPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36506MSC3RPERQ1 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 LMR36506MSC3RPERQ1 reliable?
The price and inventory of LMR36506MSC3RPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36506MSC3RPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR36506MSC3RPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36506MSC3RPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36506MSC3RPERQ1?
LMR36506MSC3RPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36506MSC3RPERQ1 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 LMR36506MSC3RPERQ1?
For technical support, including LMR36506MSC3RPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36506MSC3RPERQ1 requirements.
6.How does Aetrix verify that LMR36506MSC3RPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36506MSC3RPERQ1 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 LMR36506MSC3RPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR36506MSC3RPERQ1?
All LMR36506MSC3RPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36506MSC3RPERQ1, 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 LMR36506MSC3RPERQ1 part is unused and in its original packaging.
Return procedure for LMR36506MSC3RPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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