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Texas Instruments LMR36502PS5RPER
- Part No.:
- LMR36502PS5RPER
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR36502PS5RPER.pdf
- Description:
- IC REG BUCK ADJ/1V 150MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,961
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Product details
Overview
LMR36502PS5RPER from Texas Instruments is a 65-V input, 150-mA synchronous buck DC/DC converter in a 2-mm × 2-mm HotRod™ VQFN-HR (RPE) package, delivering fixed 5-V output with FPWM light-load operation and spread-spectrum capability. It features precision enable/UVLO (1.263 V threshold), PGOOD with glitch filtering, and operates across –40°C to +150°C junction temperature for industrial field transmitters and HVAC sensors.
For engineers reviewing the LMR36502PS5RPER datasheet, LMR36502PS5RPER pinout, LMR36502PS5RPER application, or LMR36502PS5RPER equivalent, key selection considerations include its 5-V fixed output accuracy (±1.5% in FPWM mode), 200 kHz–2.2 MHz adjustable switching frequency via RT pin, 70-V input transient tolerance, and spread-spectrum EMI reduction - all within a 4-mm² footprint.
Technical Context
The LMR36502PS5RPER uses peak current-mode control with internal compensation, enabling stable regulation with minimal output capacitance. Its FPWM light-load mode eliminates frequency variation, ensuring predictable EMI behavior in noise-sensitive applications like fire safety detectors.
It integrates a precision EN/UVLO comparator (1.263 V active threshold, 0.35 V hysteresis), a glitch-filtered open-drain PGOOD flag with 1.956 ms activation delay, and spread-spectrum modulation activated by default on this variant - distinguishing it from non-SS variants like LMR36502P3RPER.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6 V to 65 V operating; withstands 70-V transients - enables direct connection to 48-V industrial buses without external clamping. |
| Output Voltage | Fixed 5.0 V ±1.5% (FPWM mode) - eliminates need for external feedback resistors in standard 5-V rail designs. |
| Max Output Current | 150 mA continuous - supports low-power microcontrollers, analog sensors, and signal conditioning circuits. |
| Switching Frequency | 200 kHz to 2.2 MHz, set by RT-to-GND resistor - allows EMI optimization and inductor size trade-offs. |
| Quiescent Current | 0.672 µA typical at 13.5 V input (FPWM) - extends battery life in portable tools and wireless sensors. |
| Thermal Range | –40°C to +150°C junction - qualified for under-hood automotive auxiliary rails and factory automation enclosures. |
| Spread Spectrum | Enabled by default - reduces peak radiated emissions without requiring external configuration. |
Pinout & Package
Package: RPE (VQFN-HR, 9-pin), 2.00 mm × 2.00 mm, thermally enhanced HotRod™ construction with corner anchor pads for solder reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RT | Frequency programming input | Connects to GND via resistor to set switching frequency from 200 kHz to 2.2 MHz; must not be floated. |
| 2 - PGOOD | Open-drain power-good flag | Signals valid output after soft-start (1.956 ms delay) with built-in 25-µs glitch filter; requires external pull-up. |
| 3 - EN/UVLO | Enable and precision undervoltage lockout | Active-high input with 1.263 V threshold and 0.35 V hysteresis; supports direct VIN tie or remote UVLO sensing. |
| 4 - VIN | Main power input | Accepts 3.6–65 V; requires local high-quality bypass capacitor; handles 70-V transients. |
| 5 - SW | Power switch node | Connects to external inductor; exhibits minimized ringing for low EMI; drives internal high-side MOSFET. |
| 6 - BOOT | Bootstrap supply | Connects 0.1-µF capacitor to SW; powers internal high-side gate driver; UVLO triggers at 2.3 V. |
| 7 - VCC | Internal LDO output | 3.15 V regulated supply for control circuitry; not for external loads; requires 1-µF decoupling to GND. |
| 8 - VOUT/FB | Output voltage sense / feedback | Configured as fixed 5-V output; internally connected to reference; no external divider needed. |
| 9 - GND | Power ground | Common return for VIN, SW, and VCC; must connect to CIN with short, wide traces for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | Reduces peak radiated EMI amplitude by spreading energy across frequency band - critical for meeting CISPR-22 Class B in space-constrained HVAC controls. |
| FPWM light-load operation | Maintains constant switching frequency down to zero load - avoids audible noise and simplifies EMI filter design versus PFM variants. |
| Integrated PGOOD with delayed release | Eliminates need for external voltage supervisor IC; 1.956 ms activation delay ensures stable output before system reset release. |
| HotRod™ VQFN-HR package | 2-mm × 2-mm footprint with copper-exposed pad and corner anchors - achieves >3× thermal reliability vs. standard QFN in reflow and thermal cycling. |
| Precision EN/UVLO | 1.263 V ±0.1 V threshold with 0.35 V hysteresis - enables accurate brown-out detection for 5-V systems powered from variable industrial supplies. |
Applications
| Factory Automation Sensors | Building HVAC Controls |
|---|---|
Use Scenario: Powering 4–20 mA loop-powered field transmitters in chemical processing plants with 24-V DC supply and transient-rich environments. IC Role / Device Role / Timing Role: Primary 5-V regulator supplying analog front-end, ADC, and HART modem - maintains regulation during 70-V surges on plant wiring. Use Value: Eliminates need for external TVS and linear post-regulator; 150-mA output supports full sensor functionality including diagnostics and digital comms. | Use Scenario: Supplying 5-V logic and sensor bias in duct-mounted CO₂ and temperature sensors deployed in commercial HVAC air handling units. IC Role / Device Role / Timing Role: Compact 5-V source for MCU, I²C sensors, and fan control drivers - operates continuously at 60°C ambient with no derating. Use Value: Spread-spectrum EMI reduction meets FCC Part 15 Class B without added shielding; 2-mm × 2-mm footprint fits inside tight duct-mount enclosures. |
| Portable Power Tools | Fire Safety Detectors |
Use Scenario: Regulating 5-V supply for brushless motor controllers and Bluetooth LE modules in cordless garden trimmers powered from 18–21 V Li-ion packs. IC Role / Device Role / Timing Role: Input-stage buck converter stepping down pack voltage to stable 5-V rail - handles fast load transients during motor startup. Use Value: 0.672 µA quiescent current extends shelf life of stored tools; FPWM mode prevents frequency shift-induced interference with wireless comms. | Use Scenario: Providing 5-V power to smoke/heat detector microcontrollers and electrochemical gas sensors in ceiling-mounted units with strict EMI limits. IC Role / Device Role / Timing Role: Primary regulated supply enabling UL-certified self-test sequences and alarm signaling - must remain functional during line transients. Use Value: –40°C to +150°C rating covers attic installations; PGOOD flag validates power integrity before initiating self-test, avoiding false alarms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36502F3RPER | Fixed 3.3-V output; identical FPWM and spread-spectrum features; same pinout and package. | Targets 3.3-V logic domains (e.g., ARM Cortex-M0+ MCUs); not suitable for 5-V peripherals or legacy interfaces. | Select when system requires 3.3-V rail instead of 5-V; drop-in replacement except for output voltage. |
| LMR36503P5RPER | 65-V, 300-mA rated; pin-compatible; fixed 5-V output; no spread spectrum; PFM-only light-load mode. | Supports higher-current loads (e.g., multi-sensor nodes); lacks EMI-reduction feature; exhibits variable-frequency operation at light loads. | Choose for 5-V applications needing >150 mA; accept higher EMI risk and potential audible noise if PFM behavior is unacceptable. |
Compared with LMR36502F3RPER, LMR36502PS5RPER delivers 5-V output for legacy interface compatibility; compared with LMR36503P5RPER, it trades current capacity for lower EMI and consistent FPWM timing - making it optimal for noise-sensitive, moderate-current industrial endpoints.
Availability
LMR36502PS5RPER is available at Aetrix Electronics and suitable for factory automation sensors, building HVAC controls, and portable power tools requiring stable component supply, long-term industrial lifecycle support, and AEC-Q200-aligned reliability.
Supply support for LMR36502PS5RPER 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and personal electronics markets.
The LMR3650x product line delivers ultra-small, high-voltage synchronous buck converters optimized for rugged industrial endpoints - targeting space-constrained, thermally demanding applications where reliability, EMI control, and wide-input operation are critical.
FAQ
What is the output voltage configuration of the LMR36502PS5RPER?
The LMR36502PS5RPER is configured for fixed 5-V output, verified by its "S5" suffix and confirmed in the Device Comparison Table. It does not require external feedback resistors - the VOUT/FB pin is internally tied to the 5-V reference. Output accuracy is ±1.5% in FPWM mode across full load and temperature range, making it suitable for powering 5-V microcontrollers and legacy peripherals without additional regulation.
Does the LMR36502PS5RPER support spread-spectrum modulation?
Yes, the LMR36502PS5RPER includes spread-spectrum modulation enabled by default, as indicated by the "S" in its part number suffix and confirmed in the Device Comparison Table. This feature reduces peak radiated emissions without requiring external configuration or register writes, differentiating it from non-SS variants like LMR36502P3RPER. It is particularly beneficial in building automation and fire safety applications subject to strict EMC requirements.
What is the maximum input voltage the LMR36502PS5RPER can withstand?
The LMR36502PS5RPER supports a continuous input voltage range of 3.6 V to 65 V and is rated to withstand transient overvoltages up to 70 V on the VIN pin, as specified in Absolute Maximum Ratings. This makes it suitable for direct connection to unregulated 48-V industrial buses and automotive auxiliary systems where load-dump events occur, eliminating the need for external transient voltage suppressors in many implementations.
How does the EN/UVLO pin function on the LMR36502PS5RPER?
The EN/UVLO pin on the LMR36502PS5RPER provides precision enable control with a 1.263 V typical activation threshold and 0.35 V hysteresis. It supports both direct connection to VIN for simple on/off control and remote undervoltage sensing using external resistor dividers. When pulled below 0.4 V, the device enters shutdown with only 0.5 µA quiescent current. The pin must never be left floating, per datasheet guidance.
What package type and thermal characteristics does the LMR36502PS5RPER use?
The LMR36502PS5RPER uses the RPE (VQFN-HR, 9-pin) package - a 2.00 mm × 2.00 mm HotRod™ variant with exposed thermal pad and corner anchor pins. Its junction-to-ambient thermal resistance (RθJA) is 85.7°C/W on a 4-layer JEDEC board. The package supports operation from –40°C to +150°C junction temperature and is optimized for high solder joint reliability in thermally cycled industrial environments.
LMR36502PS5RPER 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:
- 150mA
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-VQFN-HR (2x2)
LMR36502PS5RPER FAQ
1.How can I place an order for LMR36502PS5RPER through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR36502PS5RPER 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 LMR36502PS5RPER reliable?
The price and inventory of LMR36502PS5RPER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR36502PS5RPER is usually 5 days.
3.What payment methods are accepted for LMR36502PS5RPER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR36502PS5RPER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR36502PS5RPER?
LMR36502PS5RPER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR36502PS5RPER 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 LMR36502PS5RPER?
For technical support, including LMR36502PS5RPER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR36502PS5RPER requirements.
6.How does Aetrix verify that LMR36502PS5RPER is sourced from the original manufacturer or authorized distributors?
All LMR36502PS5RPER 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 LMR36502PS5RPER meets industry standards.
7.What is the process for return or replacement of LMR36502PS5RPER?
All LMR36502PS5RPER units undergo pre-shipment inspection (PSI). If there is an issue with LMR36502PS5RPER, 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 LMR36502PS5RPER part is unused and in its original packaging.
Return procedure for LMR36502PS5RPER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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