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Texas Instruments LMR36506MSC5RPERQ1
- Part No.:
- LMR36506MSC5RPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36506MSC5RPERQ1.pdf
- Description:
- IC REG BUCK 5V 600MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,952
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Product details
Overview
LMR36506MSC5RPERQ1 from Texas Instruments is a 3-V to 65-V, 0.6-A AEC-Q100 Grade 1 synchronous buck converter in a 2-mm × 2-mm VQFN-HR (9) HotRod™ package, featuring fixed 5-V output, 2.2-MHz switching frequency, PFM/FPWM selectable mode, and integrated PGOOD flag - deployed in automotive infotainment power rails requiring cold-crank resilience.
For engineers reviewing the LMR36506MSC5RPERQ1 datasheet, LMR36506MSC5RPERQ1 pinout, LMR36506MSC5RPERQ1 application, or LMR36506MSC5RPERQ1 equivalent, key selection criteria include input voltage sag tolerance (down to 3.0 V), light-load quiescent current (4 µA at 24 VIN/3.3 VOUT), spread-spectrum EMI compliance per CISPR 25, thermal shutdown threshold (158–180 °C), and fixed-output accuracy (±1.5% in FPWM mode).
Technical Context
The LMR36506MSC5RPERQ1 employs peak current-mode control with internal compensation, enabling stable regulation with minimal external capacitance. Its MODE/SYNC pin supports external clock synchronization or user-selectable PFM/FPWM operation, while pseudo-random spread spectrum dithering reduces EMI peaks without requiring external filtering.
It integrates high- and low-side MOSFETs (RDS(on) = 560–920 mΩ / 280–460 mΩ), a precision 1-V reference, and a dedicated VCC LDO (3.15 V ±25 mV). The device maintains regulation during deep input sags (e.g., 3.0-V cold-crank) via automatic frequency foldback and achieves >80% efficiency at 1-mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V (falling) to 65 V - sustains operation during automotive cold-crank transients down to 3.0 V. |
| Output Current | 0.6 A continuous - supports mid-power domain supplies for ADAS sensors or display controllers. |
| Output Voltage | Fixed 5.0 V ±1.5% (FPWM) - eliminates external feedback resistors; simplifies layout and BOM. |
| Switching Frequency | Fixed 2.2 MHz - enables compact magnetics and avoids AM-band interference. |
| Quiescent Current | 4 µA at 24 VIN/3.3 VOUT (switching) - extends battery life in always-on vehicle modules. |
| PGOOD Accuracy | ±1.8% hysteresis (94–107% of VOUT) - provides precise power-rail monitoring without external supervisor IC. |
| Thermal Shutdown | Rising threshold 158–180 °C - protects against sustained overload or poor PCB thermal design. |
| EMI Compliance | Pseudo-random spread spectrum (±2% span) - meets CISPR 25 Class 5 radiated emissions without shielding. |
Pinout & Package
VQFN-HR (9-pin, 2.00 mm × 2.00 mm) with wettable flanks - enables automated optical inspection (AOI) and robust solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE/SYNC | Mode selection & clock sync input | Configures PFM/FPWM operation or synchronizes switching to external clock (0.2–2.2 MHz); must not be floated. |
| 2 - PGOOD | Open-drain power-good flag | Asserts high when VOUT is within ±1.8% window; drives reset logic or system enable without external supervisor. |
| 3 - EN/UVLO | Enable & undervoltage lockout input | Wakes at 0.4 V, enables at 1.263 V (±0.1 V hysteresis); supports direct connection to VIN for simple on/off control. |
| 4 - VIN | Main input power supply | Accepts 3–65 V DC; requires local high-quality bypass capacitor to GND for transient immunity and EMI suppression. |
| 5 - SW | Switch node | Connects to power inductor; carries high di/dt; requires short, low-inductance routing to minimize ringing and EMI. |
| 6 - BOOT | Bootstrap supply | Drives high-side MOSFET gate; requires 100-nF ceramic capacitor between BOOT and SW for reliable gate drive. |
| 7 - VCC | Internal LDO output | Supplies internal control circuitry at 3.15 V; decoupled with 1-µF capacitor to GND; not for external loads. |
| 8 - VOUT/BIAS | Fixed 5-V output sense | Factory-trimmed for 5-V fixed output; connects directly to output rail; sets feedback internally - no resistor divider needed. |
| 9 - GND | Power ground | Primary return path for VIN, SW, and VCC; must be connected to system ground with short, wide copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PGOOD flag | Eliminates need for external voltage supervisor IC by providing precise, hysteresis-controlled power-rail status. |
| HotRod™ flip-chip packaging | Reduces parasitic inductance and improves thermal performance vs. wire-bond QFN; enables AOI-compatible wettable flanks. |
| Light-load efficiency optimization | 4 µA IQ in switching mode enables >80% efficiency at 1 mA load - critical for always-on automotive modules. |
| Internal compensation | Removes requirement for external Type-II/III compensation network - reduces component count and layout sensitivity. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient (junction up to +150°C) - meets automotive power system reliability requirements. |
| Spread-spectrum EMI reduction | ±2% frequency dithering lowers peak radiated emissions to meet CISPR 25 Class 5 without common-mode chokes or shielding. |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers 5-V logic and interface circuits (e.g., LVDS serializer, microcontroller core) in automotive head units during engine start-stop cycles. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering regulated power with cold-crank hold-up capability and EMI-compliant switching. Use Value: Maintains stable 5-V output during 3.0-V input sags; eliminates need for backup capacitors or secondary regulators. |
Use Scenario: Supplies 5-V bias to image sensor and ISP in forward-facing ADAS cameras exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability DC/DC converter operating in -40°C to +125°C ambient with precise PGOOD signaling for fault-safe boot. Use Value: AEC-Q100 qualification and 158°C thermal shutdown ensure functional safety compliance in ASIL-B systems. |
| Body Control Module (BCM) Sub-Rail | Digital Cluster Display Backlight Driver Bias |
Use Scenario: Generates clean 5-V rail for CAN transceivers, LIN interfaces, and LED drivers in centralized body electronics nodes. IC Role / Device Role / Timing Role: Compact, low-noise buck converter synchronized to system clock via MODE/SYNC pin to avoid beat frequencies. Use Value: 2.2-MHz fixed frequency and spread spectrum allow placement near noise-sensitive analog circuits without filtering. |
Use Scenario: Provides stable 5-V bias for LED driver ICs powering TFT-LCD backlight in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output buck with ultra-low standby current minimizes battery drain during vehicle sleep mode. Use Value: 4 µA quiescent current extends parked vehicle battery life beyond ISO 16750-2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36506MSC3RPERQ1 | Fixed 3.3-V output; identical pinout, package, and feature set. | Used where 3.3-V logic domains dominate (e.g., MCU cores, FPGAs); not suitable for 5-V peripherals. | Select when system requires 3.3-V rail instead of 5-V - no layout change required. |
| LMR36506RS3QRPERQ1 | Adjustable output (via FB pin); RT pin for 200 kHz–2.2 MHz frequency programming; no MODE/SYNC pin. | Suitable for custom voltage rails (e.g., 1.8 V, 2.5 V) and designs requiring EMI tuning via frequency adjustment. | Choose for flexibility in output voltage and switching frequency; requires external feedback divider and RT resistor. |
Compared with LMR36506MSC3RPERQ1, the LMR36506MSC5RPERQ1 delivers higher output voltage for legacy 5-V peripherals without redesign; versus LMR36506RS3QRPERQ1, it trades adjustability for simplified BOM and guaranteed 5-V accuracy, reducing validation effort in volume automotive production.
Availability
LMR36506MSC5RPERQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMR36506MSC5RPERQ1 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-grade power management ICs.
The LMR36506-Q1 product line delivers compact, high-efficiency buck converters optimized for automotive environments - designed to withstand cold-crank, meet CISPR 25 EMI limits, and simplify power architecture in space-constrained ECUs.
FAQ
What is the output voltage accuracy of the LMR36506MSC5RPERQ1 under full load and temperature range?
The LMR36506MSC5RPERQ1 delivers 5.0 V output with ±1.5% accuracy in FPWM mode across –40°C to +125°C ambient and full 0–0.6-A load range. This specification is validated per AEC-Q100 testing and includes line, load, and temperature variation - ensuring reliable 5-V rail generation for automotive logic without external trimming.
Does the LMR36506MSC5RPERQ1 support external clock synchronization?
Yes, the LMR36506MSC5RPERQ1 supports external clock synchronization via its MODE/SYNC pin, accepting input clocks from 0.2 MHz to 2.2 MHz. When used in SYNC mode, it locks phase to the external source - reducing system-level EMI beat frequencies and enabling deterministic timing in multi-rail automotive power architectures.
What is the minimum input voltage required for the LMR36506MSC5RPERQ1 to maintain regulation?
The LMR36506MSC5RPERQ1 maintains regulation down to 3.0 V input (falling threshold), making it suitable for automotive cold-crank conditions. Below this, UVLO disables switching; above 3.0 V, it resumes regulation automatically - a key feature validated in AEC-Q100 Grade 1 testing for engine-start scenarios.
How does the PGOOD function behave during startup and fault conditions in the LMR36506MSC5RPERQ1?
The LMR36506MSC5RPERQ1 asserts PGOOD high only after soft-start completes and VOUT reaches 94–107% of nominal 5.0 V, with 1.8% hysteresis. It pulls low immediately upon EN deactivation or output undervoltage/overvoltage - providing precise, glitch-filtered (25-µs filter) power-rail status for system reset sequencing without external components.
Is the LMR36506MSC5RPERQ1 pin-compatible with other members of the LMR36506-Q1 family?
Yes, the LMR36506MSC5RPERQ1 shares identical VQFN-HR (9) 2-mm × 2-mm package and pinout with LMR36506MSC3RPERQ1 (3.3-V fixed) and LMR36506MSCQRPERQ1 (adjustable), enabling drop-in replacement across output voltage variants - provided board layout accommodates the same thermal pad and decoupling footprint.
LMR36506MSC5RPERQ1 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):
- 5V
- 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)
LMR36506MSC5RPERQ1 FAQ
1.How can I place an order for LMR36506MSC5RPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36506MSC5RPERQ1 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 LMR36506MSC5RPERQ1 reliable?
The price and inventory of LMR36506MSC5RPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36506MSC5RPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR36506MSC5RPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36506MSC5RPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36506MSC5RPERQ1?
LMR36506MSC5RPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36506MSC5RPERQ1 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 LMR36506MSC5RPERQ1?
For technical support, including LMR36506MSC5RPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36506MSC5RPERQ1 requirements.
6.How does Aetrix verify that LMR36506MSC5RPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR36506MSC5RPERQ1 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 LMR36506MSC5RPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR36506MSC5RPERQ1?
All LMR36506MSC5RPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR36506MSC5RPERQ1, 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 LMR36506MSC5RPERQ1 part is unused and in its original packaging.
Return procedure for LMR36506MSC5RPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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