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Texas Instruments LMR36506RFRPER
- Part No.:
- LMR36506RFRPER
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36506RFRPER.pdf
- Description:
- IC REG BUCK ADJ 600MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,975
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Product details
Overview
LMR36506RFRPER from Texas Instruments is a 3V–65V input, 0.6A synchronous buck DC/DC converter in a 2mm × 2mm HotRod™ QFN (RPE) package, featuring 4µA no-load quiescent current, adjustable output voltage via FB pin, and RT-pin programmable switching frequency from 200kHz to 2.2MHz. It delivers 93% peak efficiency at 12VIN/3.3VOUT and supports industrial field transmitters requiring rugged 70V transient tolerance.
For engineers reviewing the LMR36506RFRPER datasheet, LMR36506RFRPER pinout, LMR36506RFRPER application, or LMR36506RFRPER equivalent, key selection considerations include its ultra-low IQ, wide VIN range with integrated input transient protection, internal compensation for minimal external components, and precision EN/UVLO with power-good flag for system supervision.
Technical Context
The LMR36506RFRPER uses peak current mode control with internal compensation, enabling stable regulation with minimal output capacitance and eliminating need for external loop compensation. Its RT pin allows precise frequency setting across 200kHz–2.2MHz, while FPWM/light-load auto-mode selection optimizes efficiency versus noise trade-offs.
It integrates high- and low-side MOSFETs (RDS(on) = 920mΩ / 460mΩ), a precision 1.0V reference (±1%), thermal shutdown (158°C rising), and open-drain PGOOD with 1.8% hysteresis and built-in 25µs glitch filter - all operating across –40°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V (falling threshold) to 65V; withstands 70V transients per IEC 61000-4-5 |
| Output Current | 0.6A continuous; supports full load up to +150°C junction temperature |
| Quiescent Current | 4µA at 24VIN/3.3VOUT (fixed option); enables battery-backed or energy-harvesting systems |
| Switching Frequency | 200kHz–2.2MHz via RT resistor; avoids AM band and enables compact magnetics |
| Efficiency | 93% peak at 12VIN/3.3VOUT @ 400kHz; 90% at 24VIN/3.3VOUT @ 400kHz |
| Reference Accuracy | ±1% over –40°C to +150°C; ensures tight output regulation without trimming |
| Thermal Shutdown | 158°C rising threshold with 10°C hysteresis; protects against sustained overload |
Pinout & Package
LMR36506RFRPER is housed in a 9-pin VQFN-HR (RPE) package measuring 2mm × 2mm with wettable flanks and corner anchor pads for reliable solder joint inspection and mechanical robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RT | Frequency programming analog input | Connects to resistor-to-GND to set fSW from 200kHz–2.2MHz; must not float |
| 2 - PGOOD | Open-drain power-good flag | Asserts high after soft-start and output stabilization; includes 25µs glitch filter and delayed release |
| 3 - EN/UVLO | Enable and precision UVLO input | 0.4V wake-up threshold; 1.263V enable level with 0.35V hysteresis; supports direct VIN connection |
| 4 - VIN | Main power input | Accepts 3–65V; requires local high-quality bypass capacitor to GND |
| 5 - SW | Switch node | Connects to power inductor; drives internal high- and low-side MOSFETs |
| 6 - BOOT | Bootstrap supply | Requires 100nF ceramic capacitor to SW for high-side gate drive |
| 7 - VCC | Internal LDO output | 3.15V ±25mV supply for control circuitry; decouple with 1µF to GND |
| 8 - FB | Feedback input | Adjusts output voltage via resistive divider; 1V reference; input bias current 110nA max |
| 9 - GND | Power ground | Common return for VIN, SW, BOOT, VCC, FB; connect with short, wide traces to CIN |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 4µA at no load enables >10-year battery life in remote sensors |
| Integrated 70V transient protection | Eliminates need for external TVS diodes in surge-prone industrial environments |
| Internal compensation | Reduces BOM count by removing external compensation network and simplifies layout |
| Programmable switching frequency | Enables EMI optimization and magnetic component reuse across multiple designs |
| Power-good with glitch filter | Replaces external supervisor IC in microcontroller-based systems with true system status indication |
Applications
| Factory Automation Sensors | Building HVAC Controllers |
|---|---|
Use Scenario: Powering 4–20mA field transmitters in hazardous process environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator delivering stable rail under 70V line surges and –40°C to +85°C ambient. Use Value: 150°C junction rating and 4µA IQ ensure uninterrupted operation during extended brownouts and thermal stress. | Use Scenario: Supplying MCU, display, and sensor interfaces in wall-mounted thermostats exposed to HVAC-induced voltage transients. IC Role / Device Role / Timing Role: Input-tolerant buck converter providing regulated 3.3V rail with PGOOD sequencing for safe boot and fault reporting. Use Value: Integrated PGOOD with delayed release eliminates external reset supervisor, reducing board area by 25%. |
| Garden Power Tools | Industrial Fire Safety Nodes |
Use Scenario: Powering motor control logic and wireless comms in cordless drills and trimmers with Li-ion battery packs (10–42V). IC Role / Device Role / Timing Role: Wide-input buck regulator supporting variable battery voltage while maintaining constant 3.3V output for BLE SoC and Hall sensors. Use Value: Adjustable fSW allows noise-sensitive RF sections to operate outside AM band (e.g., 1.8MHz), minimizing interference. | Use Scenario: Providing backup-supply rail for smoke detector microcontrollers during AC mains failure and battery discharge. IC Role / Device Role / Timing Role: Ultra-low-IQ buck converter sustaining 3.3V output from depleted 3.6V lithium thionyl chloride cells. Use Value: 4µA no-load current extends battery service life beyond 10 years per UL 217 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36506R3RPER | Fixed 3.3V output; same RPE package, pinout, and electrical specs except VOUT configuration | No external feedback divider required; simplified design for fixed-rail systems | Select when 3.3V output is sufficient and board space for FB resistors must be minimized |
| LMR36503RFRPER | Same architecture and package but rated for 0.3A output current and 65V input | Lower thermal dissipation; suitable for lower-power sensors and IoT nodes | Choose for cost-sensitive, sub-300mA applications where footprint compatibility with LMR36506RFRPER is required |
Compared with LMR36506RFRPER, LMR36506R3RPER eliminates feedback components but sacrifices output flexibility, while LMR36503RFRPER reduces current capability by 50% yet maintains identical layout and thermal interface - enabling scalable power design across product families.
Availability
LMR36506RFRPER is available at Aetrix Electronics and suitable for factory automation sensors, building HVAC controllers, and garden power tools requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for LMR36506RFRPER 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 designing analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMR36506RFRPER belongs to TI's LMR365xx family of ultra-small, high-voltage buck converters engineered specifically for rugged industrial power supplies where size, efficiency, and reliability under extreme voltage transients are critical.
FAQ
What is the minimum input voltage required for LMR36506RFRPER to start switching?
The LMR36506RFRPER has a falling input voltage threshold of 2.45V (typical) and a rising threshold of 3.4V (typical). Once started, it sustains regulation down to 3.0V input. Below 2.45V, the device shuts down; above 3.4V, it initiates startup if EN is asserted. This dual-threshold UVLO prevents erratic operation during brownouts.
Does LMR36506RFRPER support external synchronization of its switching frequency?
No, LMR36506RFRPER does not support external synchronization. Its switching frequency is set exclusively via the RT pin using a resistor-to-GND connection, covering 200kHz to 2.2MHz. The MODE/SYNC pin variant is not offered for this part number - only RT-programmable and fixed-output variants exist in the LMR36506 family.
How is output voltage adjusted on LMR36506RFRPER?
LMR36506RFRPER uses the FB pin to adjust output voltage via an external resistive divider. With a precise 1.0V internal reference, VOUT = 1.0V × (1 + RFBT/RFBB). The FB pin draws only 110nA (max), minimizing divider current error. This configuration enables any output from ~1.2V upward, unlike fixed-output variants such as LMR36506R3RPER.
What thermal performance can be expected from LMR36506RFRPER in a standard 4-layer PCB layout?
In a JEDEC-standard 4-layer PCB, LMR36506RFRPER exhibits a junction-to-ambient thermal resistance (RθJA) of 84.4°C/W. With 0.6A load at 24VIN/3.3VOUT, typical power dissipation is ~0.3W, resulting in ~25°C junction rise above ambient - well within its –40°C to +150°C operating range. Layout best practices (thermal vias under exposed pad, short GND traces) further improve performance.
Is LMR36506RFRPER compatible with lead-free reflow profiles?
Yes, LMR36506RFRPER is qualified for standard IPC/JEDEC J-STD-020 lead-free reflow profiles, including peak temperatures up to 260°C. Its VQFN-HR (RPE) package features wettable flanks and corner anchor pads designed for automated optical inspection (AOI) and high-yield solder joint formation in high-volume manufacturing.
LMR36506RFRPER 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:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (2x2)
LMR36506RFRPER FAQ
1.How can I place an order for LMR36506RFRPER through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36506RFRPER 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 LMR36506RFRPER reliable?
The price and inventory of LMR36506RFRPER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36506RFRPER is usually 5 days.
3.What payment methods are accepted for LMR36506RFRPER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36506RFRPER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36506RFRPER?
LMR36506RFRPER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36506RFRPER 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 LMR36506RFRPER?
For technical support, including LMR36506RFRPER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36506RFRPER requirements.
6.How does Aetrix verify that LMR36506RFRPER is sourced from the original manufacturer or authorized distributors?
All LMR36506RFRPER 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 LMR36506RFRPER meets industry standards.
7.What is the process for return or replacement of LMR36506RFRPER?
All LMR36506RFRPER units undergo pre-shipment inspection (PSI). If there is an issue with LMR36506RFRPER, 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 LMR36506RFRPER part is unused and in its original packaging.
Return procedure for LMR36506RFRPER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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