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Texas Instruments LMR36500F5RPER
- Part No.:
- LMR36500F5RPER
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36500F5RPER.pdf
- Description:
- IC REG BUCK ADJ/1V 50MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,998
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Product details
Overview
LMR36500F5RPER from Texas Instruments is a 3-V to 65-V, 50-mA synchronous buck DC/DC converter in a 2-mm × 2-mm HotRod™ VQFN-HR package, featuring fixed 5-V output, FPWM light-load operation, adjustable switching frequency (200 kHz–2.2 MHz), and –40°C to +150°C junction temperature range. It delivers >80% peak efficiency at 1 MHz and supports industrial field transmitters and HVAC sensors.
For engineers reviewing the LMR36500F5RPER datasheet, LMR36500F5RPER pinout, LMR36500F5RPER application, or LMR36500F5RPER equivalent, key selection criteria include input transient tolerance (70 V), precision EN/UVLO thresholds (1.16–1.36 V), PGOOD glitch-filtered timing (15–40 µs), internal compensation for minimal output capacitance, and thermal shutdown at 158–180°C.
Technical Context
The LMR36500F5RPER uses peak current mode control with internal compensation, enabling stable regulation with minimal external output capacitance. Its FPWM light-load mode ensures consistent switching frequency under all load conditions, eliminating audible noise and simplifying EMI filtering.
It integrates a high-side MOSFET (5 Ω RDS(on)) and low-side MOSFET (3.5 Ω RDS(on)), precision enable comparator (1.263 V typical threshold), and open-drain PGOOD with built-in 25-µs glitch filter and 1.956-ms activation delay. The RT pin supports resistor-programmable frequency from 200 kHz to 2.2 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V (falling) to 65 V - supports wide industrial supply rails and withstands 70-V transients without damage |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback resistors and reduces BOM count |
| Max Output Current | 50 mA continuous - suitable for low-power microcontrollers, sensors, and analog front-ends |
| Switching Frequency | 200 kHz to 2.2 MHz (RT-programmable) - enables layout optimization for size vs. EMI trade-offs |
| Quiescent Current | 4 µA at 24 V input, 0 A load (PFM) - extends battery life in always-on portable electronics |
| Junction Temperature | –40°C to +150°C - rated for harsh environments including factory automation and power tools |
| Thermal Shutdown | 158–180°C rising threshold with 8–15°C hysteresis - prevents thermal runaway while allowing safe recovery |
Pinout & Package
LMR36500F5RPER is housed in a 9-pin VQFN-HR (RPE) package measuring 2.00 mm × 2.00 mm with wettable flanks and corner anchor pins for enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RT | Frequency programming input | Resistor-to-GND sets switching frequency from 200 kHz to 2.2 MHz; must not be floated |
| 2 - PGOOD | Open-drain power-good flag | Signals regulated output with 1.956-ms delay and 25-µs glitch filter; requires external pull-up |
| 3 - EN/UVLO | Enable and precision undervoltage lockout | 1.263 V typical turn-on threshold with 0.35 V hysteresis; supports direct VIN connection |
| 4 - VIN | Main input power supply | Accepts 3–65 V; handles 70-V transients; requires local high-quality bypass capacitor |
| 5 - SW | Switch node | Connects to power inductor; high dv/dt node requiring minimized trace area to reduce EMI |
| 6 - BOOT | Bootstrap supply for high-side driver | Requires 0.1-µF ceramic capacitor between BOOT and SW for gate drive integrity |
| 7 - VCC | Internal LDO output | 3.3 V ±0.1 V supply for control circuitry; not for external loading; requires 1-µF decoupling |
| 8 - VOUT/FB | Fixed 5-V output / feedback node | Direct 5-V output pin; no external resistors needed; internal reference = 1.0 V ±1% |
| 9 - GND | Power ground | Common return for VIN, SW, and VOUT; must connect to CIN with short, wide traces |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small HotRod™ package | 2 mm × 2 mm footprint with corner anchor pins improves solder joint reliability in thermally cycled industrial assemblies |
| FPWM light-load operation | Eliminates frequency variation at light loads, ensuring predictable EMI spectrum and avoiding audio-band noise in earbuds/headphones |
| Integrated PGOOD with delayed release | Replaces external voltage supervisor ICs; built-in 25-µs glitch filter prevents false resets during line/load transients |
| Internal compensation | Reduces required output capacitance by up to 50%, shrinking total solution size and lowering cost versus externally compensated buck converters |
| 70-V input transient capability | Withstands surge events in 24-V/48-V industrial buses without clamping or shutdown, improving system uptime |
Applications
| Field Transmitters | HVAC Sensors |
|---|---|
|
Use Scenario: Powering 4–20 mA loop-powered pressure/temperature transmitters in factory automation. IC Role / Device Role / Timing Role: Primary 5-V bias rail generator with ultra-low quiescent current to maintain loop compliance. Use Value: 4 µA shutdown current enables operation down to 3.6 V input while preserving 4–20 mA signal integrity. |
Use Scenario: Supplying low-noise 5-V rail to MEMS-based airflow and CO₂ sensors in building HVAC systems. IC Role / Device Role / Timing Role: Fixed-output DC/DC regulator delivering clean, ripple-free power for analog sensor front-ends. Use Value: FPWM mode eliminates variable-frequency switching noise that could couple into sensitive analog measurements. |
| Garden Power Tools | Wireless Earbuds |
|
Use Scenario: Providing regulated 5-V supply to motor control logic and Bluetooth modules in cordless garden tools. IC Role / Device Role / Timing Role: Input-transient-hardened buck converter operating from 18–60 V Li-ion battery packs. Use Value: 70-V transient rating protects against inductive kickback from brushed DC motors during commutation. |
Use Scenario: Generating 5-V charging rail from USB-C PD input in compact wireless earbud charging cases. IC Role / Device Role / Timing Role: Space-constrained, high-efficiency step-down regulator in ultra-thin portable enclosures. Use Value: 2-mm × 2-mm HotRod™ package enables PCB real estate savings critical for sub-20 cm³ form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36500P5RPE | Same 50-mA rating and 5-V fixed output, but uses PFM light-load mode instead of FPWM | Lower light-load quiescent current (6.5 µA vs. 4 µA at 13.5 V), but variable frequency may complicate EMI filtering | Select LMR36500P5RPE when lowest standby power is prioritized over EMI predictability |
| LMR36503F5RPE | Pin-compatible 300-mA variant with identical 5-V fixed output and FPWM mode | Higher output current supports additional peripherals (e.g., display drivers or RF modules) without redesign | Select LMR36503F5RPE when future-proofing for higher load headroom or multi-rail systems |
Compared with LMR36500F5RPE, LMR36500P5RPE trades EMI stability for lower quiescent current, while LMR36503F5RPE retains identical functionality with 6× higher current capacity-enabling scalable power architecture without layout changes.
Availability
LMR36500F5RPER is available at Aetrix Electronics and suitable for factory automation, building HVAC, and portable electronics requiring stable component supply, long-term industrial lifecycle support, and AEC-Q200–adjacent ruggedness.
Supply support for LMR36500F5RPER 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 solutions, with decades of expertise in high-reliability industrial power conversion.
The LMR36500F5RPER belongs to TI's LMR365xx family of wide-input, low-IQ buck converters designed specifically for space-constrained, thermally demanding industrial and portable applications where size, efficiency, and robustness are critical.
FAQ
What is the maximum input voltage transient the LMR36500F5RPER can survive?
The LMR36500F5RPER is rated to withstand input voltage transients up to 70 V without damage or latch-up, exceeding its 65-V maximum operating input voltage. This capability is validated per absolute maximum ratings and supports reliable operation in industrial 24-V and 48-V bus environments subject to inductive switching spikes. The LMR36500F5RPER maintains regulation during such events when properly decoupled with appropriate input capacitance.
Does the LMR36500F5RPER require external feedback resistors for 5-V output?
No, the LMR36500F5RPER provides a fixed 5-V output and does not require external feedback resistors. Its VOUT/FB pin is internally configured for 5-V regulation with ±1.5% accuracy across temperature and load. This eliminates two passive components, reduces layout area, and improves manufacturing yield compared to adjustable variants like LMR36500F5RPE.
How does the FPWM mode of the LMR36500F5RPER differ from PFM in practical design?
The LMR36500F5RPER operates in forced pulse-width modulation (FPWM) mode, maintaining constant switching frequency across all load conditions-including light loads. This avoids audible noise and simplifies EMI filter design, unlike PFM variants (e.g., LMR36500P5RPE) that skip pulses at light loads, causing variable frequency and potential interference in sensitive analog circuits.
What thermal performance can be expected from the LMR36500F5RPER in a standard 4-layer PCB?
In a JEDEC-standard 4-layer board, the LMR36500F5RPER exhibits a junction-to-ambient thermal resistance (RθJA) of 85.7°C/W. With its 150°C maximum junction temperature and typical 50-mA load, it sustains full operation up to ~85°C ambient without derating. Thermal shutdown activates at 158–180°C with 8–15°C hysteresis, ensuring safe recovery after overload conditions.
Can the LMR36500F5RPER be synchronized to an external clock?
No, the LMR36500F5RPER does not support external clock synchronization. It features only the RT pin for resistor-programmed frequency adjustment (200 kHz–2.2 MHz) and lacks a MODE/SYNC pin. For synchronizable alternatives, consider the LMR36506 series or other TI buck regulators explicitly listing "external sync" in their device comparison table.
LMR36500F5RPER 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 (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 1V (5V)
- Voltage - Output (Max):
- 16V
- Current - Output:
- 50mA
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-VQFN-HR (2x2)
LMR36500F5RPER FAQ
1.How can I place an order for LMR36500F5RPER through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36500F5RPER 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 LMR36500F5RPER reliable?
The price and inventory of LMR36500F5RPER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36500F5RPER is usually 5 days.
3.What payment methods are accepted for LMR36500F5RPER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36500F5RPER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36500F5RPER?
LMR36500F5RPER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36500F5RPER 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 LMR36500F5RPER?
For technical support, including LMR36500F5RPER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36500F5RPER requirements.
6.How does Aetrix verify that LMR36500F5RPER is sourced from the original manufacturer or authorized distributors?
All LMR36500F5RPER 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 LMR36500F5RPER meets industry standards.
7.What is the process for return or replacement of LMR36500F5RPER?
All LMR36500F5RPER units undergo pre-shipment inspection (PSI). If there is an issue with LMR36500F5RPER, 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 LMR36500F5RPER part is unused and in its original packaging.
Return procedure for LMR36500F5RPER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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