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Texas Instruments LMR36006CRNXR
- Part No.:
- LMR36006CRNXR
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
LMR36006CRNXR.pdf
- Description:
- IC REG BUCK ADJ 600MA 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LMR36006CRNXR 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, featuring 2.1-MHz fixed switching frequency, peak-current-mode control, and integrated high-side/low-side MOSFETs. It delivers regulated output voltage across industrial input transients up to 66 V and supports precision enable, power-good flag, and PFM/PWM auto-mode transition for high efficiency across load range - deployed in field transmitters, PLC modules, and HVAC sensors.
For engineers reviewing the LMR36006CRNXR datasheet, LMR36006CRNXR pinout, LMR36006CRNXR application, or LMR36006CRNXR equivalent, key selection criteria include its 2.1-MHz operation for compact filter design, 26-µA quiescent current in PFM mode, ±1.5% output regulation accuracy, thermal shutdown at 170°C, and compliance with CISPR25 Class 5 EMI requirements - all critical for space-constrained, rugged industrial power rails.
Technical Context
The LMR36006CRNXR uses peak-current-mode control with internal loop compensation, enabling stable regulation without external compensation components. Its auto-mode transitions between PWM (fixed 2.1 MHz) at medium-to-heavy loads and PFM with diode emulation at light loads, maintaining >90% efficiency at 12 VIN/5 VOUT/0.6 A while reducing no-load IQ to 26 µA.
It integrates protection features including cycle-by-cycle current limit (ISC = 0.8–1.2 A), hiccup-mode short-circuit response (tHC = 94 ms), thermal shutdown (TSD = 170°C), and input UVLO with hysteresis - all implemented within a flip-chip HotRod™ layout that minimizes switch-node ringing and parasitic inductance via parallel input paths and optimized pin placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 60 V - supports wide industrial input rails and withstands 66-V transients per IEC 61000-4-5 surge immunity. |
| Output Current | 0.6 A continuous - sufficient for powering microcontrollers, analog sensors, and communication ICs in compact modules. |
| Switching Frequency | 2.1 MHz (±10%) - enables use of small 1-µH inductors and low-ESR ceramic capacitors for minimal solution size. |
| Quiescent Current | 26 µA typical (PFM mode) - extends battery life in always-on sensor nodes and low-power field devices. |
| Feedback Reference | 1.0 V ±1.5% - provides precise adjustable output voltage setting via external resistor divider (e.g., 3.3 V, 5 V, 12 V). |
| Power-Good Delay | 80–200 µs deglitch - ensures reliable system reset signaling without false triggers during line/load transients. |
| Thermal Shutdown | 170°C shutdown / 158°C recovery - protects against sustained overload or poor PCB thermal design in enclosed enclosures. |
| EMI Performance | CISPR25 Class 5 compliant - meets stringent automotive and industrial radiated emission limits without added shielding. |
Pinout & Package
LMR36006CRNXR is housed in a 12-pin VQFN-HR (HotRod™) package measuring 2.00 mm × 3.00 mm with exposed thermal pad. The package uses flip-chip construction to minimize bond wire inductance, reduce EMI, and improve thermal performance (RθJA = 72.5°C/W, RθJB = 23.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 PGND | Power ground | Primary return path for high-current switching loops; must be connected directly to AGND and CIN with short, wide copper traces. |
| 2, 10 VIN | Main input supply | Accepts 4.2–60 V input; connects to CIN and feeds internal LDO (VCC) and gate drivers - requires low-inductance layout. |
| 3 NC | No connect | Internally unconnected; used on PCB to simplify CBOOT-to-SW routing - must not be tied to any net. |
| 4 BOOT | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; requires 100-nF ceramic capacitor to SW pin with minimal loop area. |
| 5 VCC | Internal 5-V LDO output | Supplies internal control circuitry; can power PG pull-up or logic; requires 1-µF ceramic capacitor to AGND. |
| 6 AGND | Analog ground reference | Ground reference for FB, EN, PG, and internal references; must be star-connected to PGND near device. |
| 7 FB | Feedback input | Monitors output voltage via resistor divider; 1.0-V reference sets VOUT = 1.0 × (1 + RFBT/RFBB) - never float or ground. |
| 8 PG | Open-drain power-good | Asserts high when VOUT is within ±7% of target; includes 140-µs deglitch and valid down to 2-V input - requires external pull-up. |
| 9 EN | Enable input | Logic-level control with precision thresholds (VEN-H = 1.231 V, VEN-L = 0.3 V); direct connection to VIN allowed - never float. |
| 12 SW | Switch node | Connects to inductor; carries high di/dt switching current - must be routed with minimum area and adjacent to PGND plane. |
Key Features
| Feature | Design Value |
|---|---|
| HotRod™ flip-chip packaging | Reduces switch-node ringing and EMI by eliminating bond wires; enables smaller PCB area and improved thermal dissipation. |
| Auto PFM/PWM mode transition | Maintains >90% efficiency from 1 mA to 600 mA load without manual mode selection - ideal for variable-duty industrial sensors. |
| Integrated power-good flag | Provides filtered, delay-stabilized system status signal (PG) with built-in hysteresis - eliminates need for external supervisor IC. |
| 66-V transient tolerance | Withstands IEC 61000-4-5 surge events without external TVS clamping - reduces BOM count and board space in harsh environments. |
| Internal loop compensation | Removes requirement for external compensation network - simplifies design, improves stability margin, and accelerates time-to-market. |
| Spread-spectrum modulation | Reduces peak radiated emissions across 150 kHz–108 MHz band - contributes to CISPR25 Class 5 compliance without added filters. |
Applications
| Field Transmitter Power | PLC Analog I/O Module |
|---|---|
|
Use Scenario: Powering 4–20 mA loop-powered field transmitters in oil & gas or chemical plants with wide input voltage variation and EMI-sensitive analog front-ends. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V point-of-load regulator delivering clean, stable rail to ADCs, DACs, and isolation interfaces under 60-V bus conditions. Use Value: 2.1-MHz operation minimizes inductor size for enclosure-constrained transmitter housings; 26-µA quiescent current extends loop lifetime in battery-backed configurations. |
Use Scenario: Supplying isolated analog input/output channels in programmable logic controllers where multiple voltage rails coexist on dense backplanes. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter generating local 5-V or 12-V rails for op-amps, multiplexers, and digital isolators from 24-V DC main bus. Use Value: HotRod™ layout and spread spectrum suppress noise coupling into adjacent analog signal paths - critical for <12-bit measurement accuracy. |
| HVAC Sensor Node | Industrial Video Surveillance |
|
Use Scenario: Powering wireless temperature/humidity sensor nodes mounted in ductwork or outdoor enclosures with ambient temperatures from –40°C to +85°C. IC Role / Device Role / Timing Role: Main DC/DC regulator converting 12–48 V PoE or battery input to 3.3-V MCU and RF subsystem rail with ultra-low standby power. Use Value: –40°C to +150°C junction rating ensures reliability in thermally stressed enclosures; PFM mode sustains >10-year battery life in intermittent wake-up operation. |
Use Scenario: Providing clean 5-V power to CMOS image sensors and video processors in IP cameras deployed in factory floors with motor-driven EMI sources. IC Role / Device Role / Timing Role: Low-noise, EMI-optimized buck converter feeding camera SoC and ISP, operating from 24-V industrial power bus. Use Value: CISPR25 Class 5 compliance prevents interference with video signal integrity; 2.1-MHz switching avoids beat frequencies with common video frame rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36006BRNXR | Same architecture and package, but 1-MHz switching frequency (vs. 2.1 MHz); higher tON-MIN (83 ns vs. 55 ns) limits minimum on-time at high VIN/VOUT ratios. | Better suited for designs prioritizing lower EMI over minimum solution size - allows larger inductors and reduced core loss at 1 MHz. | Select LMR36006BRNXR when board space permits larger magnetics and EMI filtering is more critical than footprint reduction. |
| LMR36015CRNXR | Pin-compatible 60-V, 1.5-A variant with identical 2.1-MHz option; higher RDS(on) (HS: 125 mΩ typ, LS: 75 mΩ typ) and different current-limit thresholds (ISC = 1.8–2.2 A). | Supports higher-current loads like motor drivers or multi-rail systems; shares same PCB layout but requires updated inductor/capacitor ratings. | Choose LMR36015CRNXR for future-proofing or when system load may scale beyond 0.6 A - same layout, no redesign needed. |
Compared with LMR36006BRNXR, the LMR36006CRNXR enables smaller passive components and tighter EMI control at high frequencies, while LMR36015CRNXR offers scalable current capacity without layout change - both preserve the same ruggedness, thermal range, and feature set for industrial deployment.
Availability
LMR36006CRNXR is available at Aetrix Electronics and suitable for field transmitters, PLC modules, and HVAC sensor nodes requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for LMR36006CRNXR 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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability power management solutions.
The LMR36006CRNXR belongs to TI's LMR360xx family of ultra-small, high-input-voltage synchronous buck converters - designed specifically for space-constrained, rugged industrial power supplies needing low EMI, wide VIN, and simplified implementation.
FAQ
What is the maximum input voltage transient the LMR36006CRNXR can withstand?
The LMR36006CRNXR is rated for input transients up to 66 V, exceeding its 60-V maximum operating input voltage. This transient tolerance meets IEC 61000-4-5 surge immunity requirements and reduces the need for external TVS diodes in industrial environments. The device maintains regulation and protection functionality during such events, provided layout follows TI's HotRod™ guidelines for low-inductance input paths. This capability is intrinsic to the LMR36006CRNXR silicon and package design.
Does the LMR36006CRNXR require external compensation components?
No, the LMR36006CRNXR features fully internal loop compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies PCB layout, reduces component count, and improves design robustness across temperature and load variations. The internal compensation is optimized for standard 1-µH inductors and ceramic output capacitors used with the LMR36006CRNXR in typical 2.1-MHz applications - verified across –40°C to +150°C junction temperature range.
How does the power-good (PG) pin of the LMR36006CRNXR behave during startup and fault conditions?
The LMR36006CRNXR PG pin is an open-drain output with built-in 140-µs deglitch filtering and hysteresis. During startup, it asserts high ~4 ms after EN is enabled, confirming stable regulation. It goes low during undervoltage (VOUT < 93% of target), overcurrent, thermal shutdown, or EN deactivation. PG remains valid down to 2-V input and requires an external pull-up resistor - behavior is fully specified in the LMR36006CRNXR Electrical Characteristics table.
Can the LMR36006CRNXR operate efficiently at very light loads, such as 1 mA?
Yes, the LMR36006CRNXR automatically enters PFM (pulse-frequency modulation) mode below ~10 mA load, achieving 26 µA typical quiescent current and maintaining >80% efficiency at 1 mA. Diode emulation reduces switching losses, and the valley-current limit ensures stable light-load regulation. This makes the LMR36006CRNXR well-suited for always-on industrial sensors and battery-backed systems where standby power is critical.
What package type and thermal characteristics does the LMR36006CRNXR use?
The LMR36006CRNXR uses a 12-pin VQFN-HR (HotRod™) package measuring 2.00 mm × 3.00 mm with exposed thermal pad. Its thermal metrics include RθJA = 72.5°C/W (JEDEC standard), RθJB = 23.3°C/W, and ψJB = 23.5°C/W - indicating strong board-level heat conduction. The flip-chip construction lowers thermal resistance versus wire-bonded QFNs, supporting continuous 0.6-A operation at +85°C ambient with proper PCB copper area.
LMR36006CRNXR 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:
- 2.1MHz
- 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)
LMR36006CRNXR FAQ
1.How can I place an order for LMR36006CRNXR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36006CRNXR 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 LMR36006CRNXR reliable?
The price and inventory of LMR36006CRNXR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36006CRNXR is usually 5 days.
3.What payment methods are accepted for LMR36006CRNXR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36006CRNXR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36006CRNXR?
LMR36006CRNXR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36006CRNXR 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 LMR36006CRNXR?
For technical support, including LMR36006CRNXR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36006CRNXR requirements.
6.How does Aetrix verify that LMR36006CRNXR is sourced from the original manufacturer or authorized distributors?
All LMR36006CRNXR 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 LMR36006CRNXR meets industry standards.
7.What is the process for return or replacement of LMR36006CRNXR?
All LMR36006CRNXR units undergo pre-shipment inspection (PSI). If there is an issue with LMR36006CRNXR, 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 LMR36006CRNXR part is unused and in its original packaging.
Return procedure for LMR36006CRNXR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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