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Texas Instruments LMR43610MSC5RPERQ1
- Part No.:
- LMR43610MSC5RPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR43610MSC5RPERQ1.pdf
- Description:
- IC REG BUCK ADJ/5V 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
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Product details
Overview
LMR43610MSC5RPERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 1A output current with fixed 5V output, 2.2MHz switching frequency, <2.5µA quiescent current at 150°C junction temperature, and support for 42V load dump-designed for always-on radar ECU power rails.
For engineers reviewing the LMR43610MSC5RPERQ1 datasheet, LMR43610MSC5RPERQ1 pinout, LMR43610MSC5RPERQ1 application, or LMR43610MSC5RPERQ1 equivalent, key selection criteria include ultra-low IQ at high temperature, CISPR25 Class 5 EMI compliance, FPWM/PFM mode selectability via MODE/SYNC, and HotRod™ QFN package with wettable flanks for automated optical inspection.
Technical Context
The LMR43610MSC5RPERQ1 uses peak current mode control with internal compensation to minimize external components and output capacitance. Its dual random spread spectrum modulation and optimized HotRod™ pinout suppress peak EMI emissions without requiring common-mode chokes.
It implements auto mode (frequency foldback at light loads) and user-selectable FPWM mode via the MODE/SYNC pin, enabling constant-frequency operation down to zero load while maintaining regulation. The device supports 3.0V–36V input, withstands 42V transients, and regulates down to 3VIN during cold-crank conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous DC output-supports radar sensor modules and infotainment subsystems without thermal derating up to 150°C TJ. |
| Input Voltage Range | 3.0V to 36V with 42V transient tolerance-meets automotive load dump and cold-crank requirements per ISO 7637-2. |
| Quiescent Current | 2.0µA typical at VIN=13.5V, VOUT=5V, auto mode-enables >10-year battery life in always-on vehicle domains. |
| Switching Frequency | Fixed 2.2MHz-avoids AM band interference and enables use of compact 1µH inductors and low-ESR ceramic capacitors. |
| EMI Performance | CISPR25 Class 5 compliant with spread spectrum enabled-eliminates need for external EMI filters in head unit and ADAS designs. |
| Junction Temperature | –40°C to +150°C operating range-qualified for under-hood and radar ECU placement without forced cooling. |
| Package | 2mm × 2mm VQFN-HR (RPE) with wettable flanks-supports AOI inspection and robust solder joint reliability in automotive reflow profiles. |
Pinout & Package
LMR43610MSC5RPERQ1 is housed in a 9-pin, 2mm × 2mm HotRod™ QFN (VQFN-HR, RPE) package with exposed thermal pad and wettable flanks for enhanced thermal performance and solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE/SYNC |
Digital control input | Selects PFM/FPWM mode or synchronizes to external clock; must not be floated; logic-high ≥1.6V enables FPWM with spread spectrum. |
| 2 PGOOD |
Open-drain status flag | Asserts high when VOUT is within ±4% of target; includes 2.5ms delay and 40µs deglitch-replaces external reset supervisor IC. |
| 3 EN/UVLO |
Enable & undervoltage lockout | Starts regulation when voltage exceeds 0.7V; shuts down below 0.5V; supports direct connection to VIN for simple enable control. |
| 4 VIN |
Main power input | Accepts 3.0–36V with 42V transient rating; requires local 10µF ceramic bypass capacitor placed adjacent to pin. |
| 5 SW |
Power switch node | Connects to external inductor; carries high di/dt switching current-requires short, wide copper pour to minimize EMI. |
| 6 BOOT |
Bootstrap supply | Drives high-side MOSFET gate; requires 100nF ceramic capacitor between BOOT and SW for reliable gate drive. |
| 7 VCC |
Internal LDO output | 3.3V regulated supply for control circuitry; decoupled with 1µF capacitor to GND; not intended for external loading. |
| 8 VOUT/FB |
Output voltage sense / feedback | Fixed 5V output configuration-connect directly to output rail; no external resistors required for 5V variant. |
| 9 GND |
Power ground | Primary return path for high-current loops; must be connected to system ground with low-inductance, wide trace adjacent to CIN. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ at high temperature | 2.0µA non-switching IQ at 13.5VIN, 5VOUT, and 150°C TJ-enables compliance with UNECE R155 power budget constraints for ADAS ECUs. |
| CISPR25 Class 5 EMI compliance | Achieved via dual random spread spectrum + HotRod™ flip-chip layout + optimized pinout-no ferrite beads or shielding required in reference design. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C TA) and extended TJ = –40°C to +150°C-validated for engine bay and front bumper radar mounting. |
| Integrated protection suite | Thermal shutdown (168°C trip), overvoltage/undervoltage lockout on VOUT/FB, hiccup-mode current limiting, and BOOT UVLO-reduces BOM count by eliminating discrete protection ICs. |
| Pin-selectable light-load behavior | MODE/SYNC pin toggles between auto mode (PFM, highest light-load efficiency) and FPWM (constant frequency, zero-load stability)-no firmware or external logic needed. |
Applications
| Radar ECU Power Supply | Infotainment Head Unit Core Rail |
|---|---|
|
Use Scenario: Powers 77GHz radar transceiver ASIC and MCU in forward collision warning systems with always-on capability. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying digital core, ADC reference, and CAN transceiver interface. Use Value: 2.0µA IQ ensures <10µA total system standby current; 42V load dump tolerance prevents brownout during alternator surge events. |
Use Scenario: Generates stable 5V rail for SoC, display controller, and audio codec in automotive head units. IC Role / Device Role / Timing Role: Secondary buck stage following 12V pre-regulator; provides low-noise, low-ripple 5V for sensitive analog blocks. Use Value: CISPR25 Class 5 compliance eliminates radiated emissions above 150MHz-avoids costly shielded enclosures and filter redesigns. |
| eCall Telematics Module | Body Control Module Subsystem |
|
Use Scenario: Supplies backup power rail for GPS receiver, cellular modem, and emergency call processor in eCall systems. IC Role / Device Role / Timing Role: Always-on 5V regulator with fast wake-up (<2.5ms PGOOD assertion) and cold-crank support down to 3VIN. Use Value: Auto mode enables >85% efficiency at 1mA load-extends backup battery runtime during vehicle ignition-off periods. |
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door module and lighting control units. IC Role / Device Role / Timing Role: Compact, thermally robust 5V source replacing legacy linear regulators and larger buck solutions. Use Value: 2mm × 2mm HotRod™ package reduces PCB area by >60% vs. comparable QFNs-enables dense body electronics layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR43610MSC3RPERQ1 | Same 1A/5V architecture but fixed 3.3V output; identical pinout, package, and EMI features. | Used where 3.3V logic rail is required instead of 5V-no change to PCB layout or thermal design. | Select when system requires 3.3V instead of 5V; shares same qualification, reliability data, and production lot traceability. |
| LMR43610RS5QRPERQ1 | 1A/5V variant with RT pin instead of MODE/SYNC; adjustable FSW (200kHz–2.2MHz) via external resistor; no spread spectrum. | Suitable for noise-insensitive applications where frequency tuning avoids sensitive bands; lacks CISPR25 Class 5 certification. | Choose when custom frequency setting is needed and EMI filtering can be added externally; not recommended for radar or infotainment. |
Compared with LMR43610MSC5RPERQ1, the MSC3RPERQ1 offers identical form-factor and EMI performance at 3.3V, while the RS5QRPERQ1 trades spread spectrum and fixed-frequency simplicity for frequency flexibility-making it less suitable for safety-critical ADAS power rails.
Availability
LMR43610MSC5RPERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems, infotainment head units, and telematics modules requiring stable component supply across automotive production lifecycles.
Supply support for LMR43610MSC5RPERQ1 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 automotive power management ICs and functional safety solutions.
The LMR436x0-Q1 product line was developed specifically for automotive power rails demanding ultra-low quiescent current, high-temperature operation, and stringent EMI compliance-targeting radar, infotainment, and body electronics applications.
FAQ
What is the maximum junction temperature rating for LMR43610MSC5RPERQ1?
The LMR43610MSC5RPERQ1 is rated for continuous operation up to +150°C junction temperature, with thermal shutdown triggering at 168°C typical. This enables placement in high-ambient locations such as radar housings or near engine compartments without external heatsinking, and is validated per AEC-Q100 Grade 1 requirements.
Does LMR43610MSC5RPERQ1 support synchronization to an external clock?
Yes, LMR43610MSC5RPERQ1 supports external clock synchronization via its MODE/SYNC pin. When a valid clock signal (0.2–2.5MHz) is applied, the internal oscillator locks in-phase to the external source, maintaining FPWM operation and full regulation-enabling deterministic timing in multi-rail automotive systems.
What is the quiescent current of LMR43610MSC5RPERQ1 at 13.5V input and 5V output?
The LMR43610MSC5RPERQ1 draws 2.0µA typical non-switching input current (IQVIN(nonsw)) at VIN = 13.5V and fixed 5V output in auto mode, measured at TJ = 25°C. At 150°C junction temperature, this remains below 2.5µA-ensuring compliance with automotive always-on power budgets.
Can LMR43610MSC5RPERQ1 operate during automotive cold-crank conditions?
Yes, LMR43610MSC5RPERQ1 supports input voltages as low as 3.0V after startup and 3.6V for initial start-up, meeting ISO 16750-2 cold-crank requirements. It maintains regulation down to 3VIN with frequency foldback, ensuring uninterrupted power to critical ECUs during engine cranking.
Is LMR43610MSC5RPERQ1 pin-compatible with other devices in the LMR436x0-Q1 family?
Yes, LMR43610MSC5RPERQ1 shares identical 9-pin VQFN-HR (RPE) package, pinout, and footprint with all LMR436x0-Q1 variants-including LMR43620MSC5RPERQ1 (2A), LMR43610MSC3RPERQ1 (1A/3.3V), and LMR43610RS5QRPERQ1 (RT-pin variant)-enabling scalable power design with minimal layout changes.
LMR43610MSC5RPERQ1 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):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V (5V)
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 1A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (2x2)
LMR43610MSC5RPERQ1 FAQ
1.How can I place an order for LMR43610MSC5RPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR43610MSC5RPERQ1 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 LMR43610MSC5RPERQ1 reliable?
The price and inventory of LMR43610MSC5RPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR43610MSC5RPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR43610MSC5RPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR43610MSC5RPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR43610MSC5RPERQ1?
LMR43610MSC5RPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR43610MSC5RPERQ1 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 LMR43610MSC5RPERQ1?
For technical support, including LMR43610MSC5RPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR43610MSC5RPERQ1 requirements.
6.How does Aetrix verify that LMR43610MSC5RPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR43610MSC5RPERQ1 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 LMR43610MSC5RPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR43610MSC5RPERQ1?
All LMR43610MSC5RPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR43610MSC5RPERQ1, 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 LMR43610MSC5RPERQ1 part is unused and in its original packaging.
Return procedure for LMR43610MSC5RPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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