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Texas Instruments LMR36506RRPER
- Part No.:
- LMR36506RRPER
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36506RRPER.pdf
- Description:
- IC REG BUCK ADJ 600MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
LMR36506RRPER from Texas Instruments is a 3V–65V input, 0.6A synchronous buck DC/DC converter in a 2mm × 2mm HotRod™ QFN package, featuring 4µA no-load quiescent current, adjustable output voltage via FB pin, and programmable 200kHz–2.2MHz switching frequency using the RT pin - deployed in field transmitters, HVAC controllers, and power tool battery management systems.
For engineers reviewing the LMR36506RRPER datasheet, LMR36506RRPER pinout, LMR36506RRPER application, or LMR36506RRPER equivalent, key selection considerations include its –40°C to +150°C junction temperature rating, 70V input transient tolerance, internal compensation for minimal external components, PGOOD with built-in glitch filter, and precision EN/UVLO for reliable start-up control in industrial environments.
Technical Context
The LMR36506RRPER 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 supports precise frequency programming across 200kHz–2.2MHz, while auto-mode operation dynamically switches between PFM and FPWM to optimize light-load efficiency.
It integrates precision enable logic with 0.4V wake threshold and 0.35V hysteresis, thermal shutdown at 168°C (rising) with 10°C hysteresis, and a robust open-drain PGOOD flag with 94%–96.5% falling threshold and 15–40µs glitch filtering - all operating within a single 2mm × 2mm VQFN-HR (RPE) package with 9 terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V (falling threshold) to 65V - supports wide industrial rails and withstands 70V transients without damage |
| Output Current | 0.6A continuous - sufficient for powering microcontrollers, sensors, and gate drivers in compact systems |
| IQ (No Load) | 4µA at 24VIN/3.3VOUT - enables multi-year battery life in always-on industrial IoT nodes |
| Switching Frequency | 200kHz–2.2MHz via RT pin - allows EMI optimization and inductor size reduction across applications |
| Junction Temp Range | –40°C to +150°C - qualified for under-hood, factory floor, and high-ambient embedded deployments |
| Package | 2mm × 2mm VQFN-HR (RPE, 9-pin) - ultra-small footprint with HotRod™ construction for low parasitic inductance |
| PGOOD Accuracy | ±1.5% window (94–107% of VOUT) with 15–40µs glitch filter - eliminates need for external supervisor IC |
Pinout & Package
The LMR36506RRPER is housed in a 2mm × 2mm VQFN-HR (RPE) package with wettable flank leads for optical solder inspection and enhanced reliability. All pins are validated per TI SNVSBB6C datasheet Rev. JANUARY 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RT | Frequency programming analog input | Connects to resistor-to-GND to set switching frequency from 200kHz to 2.2MHz; must not be floated |
| 2 - PGOOD | Open-drain power-good flag | Signals regulated output status; includes built-in glitch filter and delayed release - replaces external reset supervisor |
| 3 - EN/UVLO | Enable and precision UVLO input | 0.4V wake threshold with 0.35V hysteresis; supports direct connection to VIN for simple on/off control |
| 4 - VIN | Main power input | Accepts 3V–65V; rated for 70V transients; requires local high-quality bypass capacitor to GND |
| 5 - SW | Switch node | Connects to power inductor; carries high di/dt; layout critical for EMI and efficiency |
| 6 - BOOT | Bootstrap supply | Requires 100nF ceramic capacitor to SW; enables high-side MOSFET drive in synchronous topology |
| 7 - VCC | Internal LDO output | 3.15V ±25mV supply for control circuitry; decouple with 1µF to GND; not for external loading |
| 8 - FB | Feedback input (adjustable variant) | Connects to resistor divider for output voltage setting; 1V reference; 110nA input bias enables high-resistor dividers |
| 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 |
|---|---|
| Ultra-low IQ | 4µA at 24VIN/3.3VOUT enables >10-year battery life in remote sensor nodes without compromising start-up speed |
| 70V Input Transient Tolerance | Withstands IEC 61000-4-5 surge events without external clamping - reduces BOM count and board space |
| Internal Compensation | Eliminates need for external compensation network; simplifies design and improves stability across load/temperature |
| HotRod™ QFN Package | 2mm × 2mm footprint with corner anchor pads ensures high-yield reflow and reliable mechanical attachment in vibration-prone environments |
| Auto-Mode Operation | Seamlessly transitions between PFM (high efficiency at light loads) and FPWM (low-noise, fixed-frequency at heavy loads) |
Applications
| Factory Automation Sensors | Building HVAC Controllers |
|---|---|
Use Scenario: Powering 4–20mA field transmitters in chemical processing plants with wide ambient temperature swings and EMI-rich motor drive environments. IC Role / Device Role / Timing Role: Primary 3.3V/5V step-down regulator supplying MCU, ADC, and analog front-end; maintains regulation during 70V line surges. Use Value: 4µA IQ extends loop-powered transmitter runtime; 150°C max junction temp ensures operation near steam lines and reactors. | Use Scenario: Supplying control logic and communication interfaces (RS-485, CAN) in rooftop HVAC units exposed to outdoor temperature extremes. IC Role / Device Role / Timing Role: Main DC/DC converter generating stable 3.3V rail from 24VAC-derived DC bus; supports auto-restart after brownouts. Use Value: Adjustable frequency avoids AM-band interference; PGOOD replaces discrete supervisor, reducing component count by one IC. |
| Garden Power Tools | Industrial Fire Safety Systems |
Use Scenario: Regulating battery-pack voltage (18–60V) to 3.3V for BLDC motor controllers and wireless telemetry in cordless drills and trimmers. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in FPWM mode during motor bursts; enters PFM during idle periods. Use Value: 93% peak efficiency at 12VIN/3.3VOUT maximizes runtime; 2mm × 2mm package saves space in compact tool handles. | Use Scenario: Providing fail-safe 5V supply to smoke detector microcontrollers and RF transceivers in commercial buildings with strict EMC requirements. IC Role / Device Role / Timing Role: Primary power source with integrated PGOOD monitoring system health; immune to conducted transients per IEC 61000-4-5. Use Value: Low EMI and minimized switch-node ringing meet Class B emissions limits; thermal shutdown at 168°C prevents fault propagation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36506R3RPER | Fixed 3.3V output; same package, pinout, and specs except FB pin replaced by VOUT/BIAS | Eliminates feedback resistors but loses output adjustability; suited for cost-sensitive fixed-rail designs | Select when 3.3V is mandatory and board space for feedback network is constrained |
| LMR36520RRPER | 2A output current; identical 2mm × 2mm RPE package; shares RT, EN, PGOOD, and FB pin functions | Supports higher-power loads (e.g., multi-sensor hubs); requires larger inductor and output cap due to increased IOUT | Choose when future-proofing for 1–2A loads or upgrading from LMR36506RRPER without PCB redesign |
Compared with LMR36506R3RPER, the LMR36506RRPER offers output voltage flexibility at the cost of two external resistors; compared with LMR36520RRPER, it trades current capability for lower thermal stress and smaller passive components in sub-0.6A applications.
Availability
LMR36506RRPER 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 consistent parametric performance across temperature extremes.
Supply support for LMR36506RRPER 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMR36506RRPER belongs to TI's LMR365xx family of ultra-small, high-voltage buck converters designed specifically for rugged industrial power supplies where space, thermal resilience, and transient immunity are critical.
FAQ
What is the minimum input voltage required for LMR36506RRPER to start switching?
The LMR36506RRPER has a rising input voltage threshold of 3.5V (typical) and a falling threshold of 3.0V (typical). It begins switching once VIN exceeds the rising threshold and remains operational down to the falling threshold. Below 3.0V, the device shuts down. This behavior is defined in the EN/UVLO circuit and ensures reliable startup across varying input sources such as battery packs or rectified AC rails.
Does LMR36506RRPER support external synchronization of its switching frequency?
No, the LMR36506RRPER does not support external synchronization. It is an RT-pin-programmable variant only - frequency is set via a resistor from RT to GND (or VCC/GND for fixed 1MHz/2.2MHz), with no MODE/SYNC pin. Synchronization capability is reserved for other variants like LMR36506RF3RPER with dedicated SYNC functionality, as confirmed in TI's Device Comparison Table.
How is output voltage adjusted on LMR36506RRPER?
The LMR36506RRPER uses the FB pin to sense output voltage via an external resistor divider. With a 1.0V internal reference, VOUT = 1.0V × (1 + RFBT/RFBB). Typical configurations use RFBB = 100kΩ and calculate RFBT accordingly - e.g., 330kΩ for 5.3V. The FB pin draws only 110nA, enabling high-impedance dividers that minimize quiescent current impact.
What thermal protection features does LMR36506RRPER include?
The LMR36506RRPER incorporates thermal shutdown with a rising threshold of 168°C (typical) and hysteresis of 10°C (typical), allowing recovery at ~158°C. It also features internal VCC UVLO (3.3V threshold) and boot capacitor UVLO (2.3V threshold) to prevent MOSFET shoot-through during low-bias conditions - all verified over –40°C to +150°C junction temperature range.
Can LMR36506RRPER be used in automotive applications?
The LMR36506RRPER is not AEC-Q200 qualified and lacks automotive-specific validation (e.g., extended temperature screening, PPAP documentation). While its –40°C to +150°C rating overlaps with some automotive under-hood zones, TI positions this device for industrial use only. For automotive applications, TI recommends AEC-Q200-compliant alternatives such as LM61480-Q1 or TPS546B24A-Q1.
LMR36506RRPER 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)
LMR36506RRPER FAQ
1.How can I place an order for LMR36506RRPER through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36506RRPER 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 LMR36506RRPER reliable?
The price and inventory of LMR36506RRPER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36506RRPER is usually 5 days.
3.What payment methods are accepted for LMR36506RRPER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36506RRPER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36506RRPER?
LMR36506RRPER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36506RRPER 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 LMR36506RRPER?
For technical support, including LMR36506RRPER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36506RRPER requirements.
6.How does Aetrix verify that LMR36506RRPER is sourced from the original manufacturer or authorized distributors?
All LMR36506RRPER 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 LMR36506RRPER meets industry standards.
7.What is the process for return or replacement of LMR36506RRPER?
All LMR36506RRPER units undergo pre-shipment inspection (PSI). If there is an issue with LMR36506RRPER, 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 LMR36506RRPER part is unused and in its original packaging.
Return procedure for LMR36506RRPER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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