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Texas Instruments LMR36006BRNXR
- Part No.:
- LMR36006BRNXR
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36006BRNXR.pdf
- Description:
- IC REG BUCK ADJ 600MA 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,099
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Product details
Overview
LMR36006BRNXR from Texas Instruments is a 4.2-V to 60-V, 0.6-A synchronous step-down DC/DC converter in a 2-mm × 3-mm HotRod™ VQFN-HR-12 package. It delivers regulated output voltage via adjustable feedback (VFB = 1.0 V), features peak-current-mode control, integrated high-side/low-side MOSFETs, and operates at 1 MHz with 26 µA quiescent current-ideal for space-constrained industrial field transmitters and PLC modules.
For engineers reviewing the LMR36006BRNXR datasheet, LMR36006BRNXR pinout, LMR36006BRNXR application, or LMR36006BRNXR equivalent, key selection considerations include input transient tolerance up to 66 V, thermal shutdown at 170°C, power-good flag with 80–200 µs deglitch delay, and compatibility with CISPR 25 Class 5 EMI requirements.
Technical Context
The LMR36006BRNXR uses peak-current-mode control with internal loop compensation, enabling stable regulation without external compensation components. Its auto-mode operation dynamically switches between PWM (constant 1 MHz) at medium-to-heavy loads and PFM with diode emulation at light loads to maintain >92% efficiency at 12 VIN/5 VOUT/0.6 A while minimizing quiescent current.
Protection architecture includes cycle-by-cycle high-side current limit (0.8–1.2 A), low-side valley current limit (0.6–0.95 A), hiccup-mode short-circuit response (94 ms off-time), thermal shutdown (170°C trip), and input UVLO referenced to internal 5-V LDO (VCC UVLO rising at 3.8 V). The HotRod™ flip-chip package reduces switch-node ringing and parasitic inductance via parallel input paths and optimized pin layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 60 V - supports wide industrial input rails including 24 V and 48 V systems with 66 V transient tolerance. |
| Output Current | 0.6 A continuous - sufficient for powering microcontrollers, sensors, and analog front-ends in compact modules. |
| Switching Frequency | 1 MHz (fixed) - enables use of small external inductors (e.g., 2.2 µH) and reduces solution footprint. |
| Feedback Reference | 1.0 V ±15 mV - allows precise output voltage setting via resistor divider; supports 3.3 V, 5 V, or custom outputs. |
| Quiescent Current | 26 µA typical - extends battery life in always-on industrial sensors and field devices operating in PFM mode. |
| Thermal Shutdown | 170°C trip / 158°C recovery - provides robust overtemperature protection without requiring external thermal monitoring. |
| Power-Good Delay | 80–200 µs deglitch - prevents false system resets during brief line/load transients while ensuring reliable rail monitoring. |
Pinout & Package
LMR36006BRNXR is housed in a 12-pin VQFN-HR (HotRod™) package measuring 2.00 mm × 3.00 mm with exposed thermal pad. The package enables low EMI, high efficiency, and minimal PCB area usage through flip-chip construction and optimized pin placement for low-inductance routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 2, 10) | Primary input power supply | Accepts 4.2–60 V; requires low-ESR CIN connected with short, wide traces to minimize input ripple and EMI. |
| SW (Pin 12) | Switch node | Connects directly to power inductor; high dv/dt node-requires tight layout and minimal trace length to reduce ringing. |
| BOOT (Pin 4) | High-side gate driver supply | Requires 100-nF ceramic capacitor to SW; critical for proper high-side MOSFET turn-on and efficiency. |
| FB (Pin 7) | Feedback input | Monitors output voltage via resistive divider; 1.0 V reference enables accurate regulation across temperature. |
| PG (Pin 8) | Open-drain power-good flag | Signals valid output with built-in filtering; requires external pull-up to VCC or VOUT; asserts low on fault or EN deactivation. |
| EN (Pin 9) | Enable control input | Logic-level enable with precision thresholds (1.157–1.3 V high, 0.3 V low); supports direct VIN connection or external UVLO. |
| AGND (Pin 6) | Analog ground reference | Ground reference for FB, PG, EN, and internal references; must be tied to PGND at single point near device. |
| PGND (Pins 1, 11) | Power ground return | High-current return path for VIN, SW, and CIN; connects to system ground and AGND with low-inductance layout. |
| VCC (Pin 5) | Internal 5-V LDO output | Supplies internal circuitry; not for external loading; requires 1-µF bypass capacitor to AGND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| 66-V input transient tolerance | Eliminates need for upstream TVS or clamping circuits in IEC 61000-4-5 surge-immune designs. |
| CISPR 25 Class 5 EMI compliance | Enables direct use in automotive and industrial EMC-critical applications without added filtering or shielding. |
| HotRod™ flip-chip packaging | Reduces switch-node ringing and PCB parasitics, improving efficiency and easing layout for ultra-compact solutions. |
| Integrated high/low-side MOSFETs | Removes external FET selection and gate-drive design effort; RDS(on) = 225 mΩ (HS) / 150 mΩ (LS) at 0.5 A. |
| Auto PFM/PWM mode transition | Maintains >87% efficiency at full load and >92% at light loads without manual mode selection or external control. |
Applications
| Field Transmitters | PLC I/O Modules |
|---|---|
|
Use Scenario: Powering 4–20 mA loop-powered sensor transmitters in hazardous or remote locations. IC Role / Device Role / Timing Role: Primary DC/DC regulator converting 24 V loop supply to stable 3.3 V or 5 V for MCU and signal conditioning. Use Value: 66 V transient tolerance ensures survival during lightning-induced surges on long field wiring; 26 µA quiescent current preserves loop margin. |
Use Scenario: Providing isolated auxiliary power for digital I/O expansion cards in modular programmable logic controllers. IC Role / Device Role / Timing Role: Compact, efficient buck converter supplying 5 V to FPGA configuration logic and level-shifting buffers. Use Value: 2 mm × 3 mm HotRod™ package fits within tight board spacing constraints; 1 MHz switching avoids interference with CAN or RS-485 data lines. |
| Video Surveillance Cameras | HVAC Control Panels |
|
Use Scenario: Powering image sensor, ISP, and Wi-Fi SoC in IP-based security cameras mounted outdoors. IC Role / Device Role / Timing Role: Main power stage delivering 0.6 A at 1.1 V or 1.8 V to processor core, with PFM mode extending standby battery life. Use Value: Thermal shutdown at 170°C protects against enclosure overheating in sealed outdoor enclosures; EMI optimization meets FCC/CE radiated emissions limits. |
Use Scenario: Regulating 24 V AC/DC adapter output to 3.3 V for microcontroller, display, and environmental sensor subsystems. IC Role / Device Role / Timing Role: Synchronous buck converter providing clean, efficient power with integrated PG flag for system health monitoring. Use Value: Power-good flag with 80–200 µs deglitch enables reliable brownout detection and controlled MCU reset without external supervisor IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36015BRNXR | Same 4.2–60 V input, but rated for 1.5 A output; identical 2×3 mm HotRod™ package and pinout. | Supports higher-power loads such as motor drivers or multi-rail systems where 0.6 A is insufficient. | Select when output current demand exceeds 0.6 A but board space and layout reuse are priorities. |
| LMR33630ADJR | 36 V max input, 3 A output, 3.5 mm × 3.5 mm VQFN; fixed 2.1 MHz switching frequency. | Targets lower-input-voltage industrial systems (e.g., 12 V or 24 V rails) requiring higher current and faster transient response. | Choose for cost-sensitive 24 V applications needing >0.6 A, accepting larger footprint and reduced input voltage range. |
Compared with LMR36006BRNXR, LMR36015BRNXR offers 2.5× higher current in identical footprint-ideal for scalable designs-while LMR33630ADJR trades input voltage range for higher current and faster switching, better suited to non-60 V systems where size is less constrained.
Availability
LMR36006BRNXR is available at Aetrix Electronics and suitable for field transmitters, PLC modules, and HVAC control panels requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceability.
Supply support for LMR36006BRNXR 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 power management technologies, with decades of industrial-grade reliability validation.
The LMR36006BRNXR belongs to TI's LMR360xx family of ultra-small synchronous buck converters, designed specifically for rugged, space-constrained industrial power supplies requiring high input voltage tolerance and low EMI.
FAQ
What is the maximum input voltage rating for LMR36006BRNXR?
The LMR36006BRNXR has an absolute maximum input voltage rating of 66 V, with recommended operating range from 4.2 V to 60 V. This 66-V transient tolerance allows the device to withstand IEC 61000-4-5 surge events without external protection, simplifying design for industrial field equipment powered from unregulated 24 V or 48 V sources. Operation above 60 V is only permitted for short-duration transients.
Does LMR36006BRNXR require external compensation components?
No, the LMR36006BRNXR uses internal loop compensation, eliminating the need for external Type II or Type III compensation networks. This simplifies design, reduces BOM count, and improves consistency across production units. The device is optimized for standard output capacitor ESR ranges and works reliably with common ceramic or polymer capacitors without tuning.
How does the power-good (PG) flag behave during startup and fault conditions?
The LMR36006BRNXR PG pin is an open-drain output that goes high after soft-start completes (~4 ms delay from EN assertion) and remains high as long as output voltage stays within 93–107% of the target (based on FB reference). It pulls low during thermal shutdown, current-limit hiccup, undervoltage, or when EN is deasserted. A built-in 80–200 µs deglitch filter prevents false triggering from transient excursions.
Can LMR36006BRNXR operate with input voltages below 4.2 V?
No, the LMR36006BRNXR has a minimum recommended input voltage of 4.2 V. Below this, the internal control circuitry cannot maintain regulation or sustain switching operation. Attempting to operate below 4.2 V may result in dropout behavior, erratic PG flag output, or failure to start-even if the EN pin is asserted-due to insufficient headroom for the internal 5-V LDO and gate drivers.
What is the thermal performance of LMR36006BRNXR in its VQFN-HR package?
The LMR36006BRNXR in the 2-mm × 3-mm VQFN-HR package has a junction-to-board thermal resistance (RθJB) of 23.3°C/W and junction-to-ambient (RθJA) of 72.5°C/W under standard JEDEC PCB conditions. With proper thermal pad soldering and 2–4 thermal vias to inner ground planes, it sustains 0.6 A continuous output at ambient temperatures up to +85°C without derating in typical industrial layouts.
LMR36006BRNXR 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:
- 600mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-VQFN-HR (3x2)
LMR36006BRNXR FAQ
1.How can I place an order for LMR36006BRNXR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36006BRNXR 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 LMR36006BRNXR reliable?
The price and inventory of LMR36006BRNXR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36006BRNXR is usually 5 days.
3.What payment methods are accepted for LMR36006BRNXR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36006BRNXR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36006BRNXR?
LMR36006BRNXR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36006BRNXR 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 LMR36006BRNXR?
For technical support, including LMR36006BRNXR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36006BRNXR requirements.
6.How does Aetrix verify that LMR36006BRNXR is sourced from the original manufacturer or authorized distributors?
All LMR36006BRNXR 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 LMR36006BRNXR meets industry standards.
7.What is the process for return or replacement of LMR36006BRNXR?
All LMR36006BRNXR units undergo pre-shipment inspection (PSI). If there is an issue with LMR36006BRNXR, 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 LMR36006BRNXR part is unused and in its original packaging.
Return procedure for LMR36006BRNXR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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