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Texas Instruments LMR43620MSC5RPERQ1
- Part No.:
- LMR43620MSC5RPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR43620MSC5RPERQ1.pdf
- Description:
- IC REG BUCK ADJ/5V 2A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,419
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Product details
Overview
LMR43620MSC5RPERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 2A continuous output at fixed 5V, operating from 3.0V–36V input with 42V load-dump tolerance, featuring 2.2MHz fixed switching frequency, <2.5µA quiescent current at 150°C, and spread-spectrum EMI reduction for radar ECU power rails.
For engineers reviewing the LMR43620MSC5RPERQ1 datasheet, LMR43620MSC5RPERQ1 pinout, LMR43620MSC5RPERQ1 application, or LMR43620MSC5RPERQ1 equivalent, this page delivers verified package mapping (RPE VQFN-HR, 9-pin, 2mm × 2mm), confirmed thermal performance (TJ up to +150°C), validated PGOOD timing (2.5ms activation delay), and real-world light-load efficiency data (≥85% at 1mA).
Technical Context
The LMR43620MSC5RPERQ1 uses peak-current-mode control with internal compensation and dual-random spread-spectrum dithering to minimize output capacitance and meet CISPR-25 Class 5 EMI requirements. Its MODE/SYNC pin enables user-selectable PFM/FPWM operation or external clock synchronization between 0.2–2.5MHz.
It integrates high-side (260mΩ max) and low-side (140mΩ max) MOSFETs, supports auto-mode frequency foldback down to ~200kHz under light loads, and maintains regulation with ≤0.9V dropout at 1A output-enabling robust cold-crank (3VIN) and load-dump (42V transient) operation in automotive body and ADAS systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous DC - supports radar sensor modules and infotainment SoCs without derating at TJ = 125°C. |
| Input Voltage Range | 3.0V–36V - covers automotive cold-crank (3V) and 42V transients (with 42V abs max rating). |
| Fixed Output Voltage | 5.00V ±0.6% - tight accuracy over –40°C to +150°C ensures stable USB-PD or MCU I/O rail operation. |
| Quiescent Current | 2.0µA at 13.5VIN, 0A load, auto mode - enables >10-year battery standby in always-on telematics. |
| Switching Frequency | Fixed 2.2MHz - avoids AM band interference and allows use of compact 1µH inductors in 10mm × 10mm designs. |
| EMI Performance | CISPR-25 Class 5 compliant - eliminates need for common-mode chokes in head-unit power supplies. |
| Thermal Rating | TJ = –40°C to +150°C - qualified for under-hood placement in engine control units and ADAS ECUs. |
Pinout & Package
LMR43620MSC5RPERQ1 is housed in a 2mm × 2mm, 9-pin HotRod™ QFN (RPE package) with wettable flanks for automated optical inspection and enhanced solder-joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE/SYNC |
Digital control input | Selects PFM/FPWM mode or synchronizes switching to external clock (0.2–2.5MHz); must not be floated. |
| 2 PGOOD |
Open-drain status flag | Asserts high after 2.5ms soft-start when VOUT reaches 90% of target; enables system reset sequencing without external supervisor. |
| 3 EN/UVLO |
Enable & precision UVLO input | Wakes at 0.7V, starts regulation at 1.23V with 0.35V hysteresis; supports direct connection to VIN for simple enable logic. |
| 4 VIN |
Main power input | Accepts 3.0–36V with 42V transient rating; requires local 10µF ceramic bypass capacitor to GND. |
| 5 SW |
Power switch node | Connects to external 1µH power inductor; carries high di/dt; requires short, wide PCB trace to minimize ringing. |
| 6 BOOT |
High-side gate driver supply | Requires 100nF ceramic capacitor to SW; enables efficient 30V-rated internal high-side MOSFET drive. |
| 7 VCC |
Internal LDO output | 3.3V ±3% regulated supply for control circuitry; decoupled with 1µF capacitor to GND; not for external loading. |
| 8 VOUT/FB |
Output voltage sense / feedback | Configured as fixed 5V output; connects directly to output capacitor; sets regulation point with internal 1.00V reference. |
| 9 GND |
Power ground | Primary thermal and current return path; must be connected to CIN with low-inductance, wide copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ at high temperature | 2.0µA at 13.5VIN, 0A, TJ = 150°C - extends battery life in parked ADAS cameras without compromising wake-up latency. |
| Integrated spread spectrum | Dual-random dithering reduces peak EMI by >10dB - meets CISPR-25 Class 5 without added filtering components. |
| Automotive-grade thermal design | RθJA = 84.4°C/W on standard PCB; 150°C TJ max enables placement near heat sources in domain controllers. |
| Robust fault protection | Thermal shutdown at 168°C with 20°C hysteresis; current limits (HS: 3.4A typ, LS: 2.2A typ) prevent damage during short-circuit events. |
| Scalable pin compatibility | Pins match LMR36506-Q1 (65V/600mA) and LMR36503-Q1 (65V/300mA) - simplifies multi-rail power architecture upgrades. |
Applications
| ADAS Radar ECU Power | Infotainment Head Unit |
|---|---|
|
Use Scenario: Powers 77GHz radar transceiver SoC requiring clean, low-noise 5V rail with fast transient response during chirp bursts. IC Role / Device Role / Timing Role: Primary 2A buck regulator supplying core logic and RF bias; provides PGOOD signal for SoC reset coordination. Use Value: 2.2MHz fixed FSW avoids radar IF band interference; spread spectrum suppresses harmonics that could corrupt echo detection. |
Use Scenario: Delivers stable 5V to USB-C PD controller, display interface, and audio codec in centralized vehicle head unit. IC Role / Device Role / Timing Role: Secondary buck stage downstream of main 12V bus; enables compact layout with minimal input filter. Use Value: Wettable-flank RPE package ensures solder-joint reliability across thermal cycles; 42V transient rating survives jump-start events. |
| Body Control Module (BCM) | eCall Telematics Module |
|
Use Scenario: Supplies 5V to LIN gateway microcontroller and LED driver ICs in door module or lighting control unit. IC Role / Device Role / Timing Role: Always-on power source with ultra-low IQ; enables wake-on-LIN functionality without draining 12V battery. Use Value: 1.5µA shutdown current extends 12V battery life beyond 10 years in parked vehicle; EN pin supports deep-sleep entry via MCU GPIO. |
Use Scenario: Powers GNSS receiver, cellular modem, and emergency call processor in crash-detection telematics unit. IC Role / Device Role / Timing Role: Primary regulator with PGOOD-driven system watchdog; supports cold-crank operation down to 3VIN. Use Value: 3V start-up capability ensures GPS lock and call initiation during engine cranking; AEC-Q100 Grade 1 certifies for safety-critical deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR43620MSC3RPERQ1 | Same RPE package, 2A rating, but fixed 3.3V output; identical 2.2MHz FSW and spread-spectrum EMI features. | Used where 3.3V logic rails dominate (e.g., MCU cores, CAN transceivers); not suitable for 5V USB or analog sensors. | Select when system requires 3.3V instead of 5V; pin-compatible drop-in replacement with no layout change. |
| LMR43620RS5QRPERQ1 | Same 5V fixed output and 2A rating, but RT-pin variant: adjustable 200kHz–2.2MHz FSW via external resistor; no spread spectrum. | Preferred for noise-sensitive audio subsystems where deterministic frequency avoids beat tones; lacks CISPR-25 Class 5 compliance. | Choose when custom frequency tuning is needed to avoid sensitive bands; requires external RT resistor and forfeits EMI certification. |
Compared with LMR43620MSC3RPERQ1, the LMR43620MSC5RPERQ1 delivers higher output voltage for USB peripherals and analog front-ends, while retaining identical thermal, EMI, and packaging advantages. Against LMR43620RS5QRPERQ1, it trades frequency flexibility for guaranteed CISPR-25 Class 5 compliance and simplified BOM with no external resistor.
Availability
LMR43620MSC5RPERQ1 is available at Aetrix Electronics and suitable for automotive radar ECUs, infotainment head units, and telematics modules requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LMR43620MSC5RPERQ1 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 automotive ICs, with decades of automotive qualification expertise and functional safety documentation support.
The LMR436x0-Q1 product line is designed specifically for automotive power management in ADAS, infotainment, and body electronics-delivering ultra-small footprint, ultra-low IQ, and certified EMI performance in harsh environments.
FAQ
What is the maximum junction temperature rating for the LMR43620MSC5RPERQ1?
The LMR43620MSC5RPERQ1 is rated for continuous operation up to +150°C junction temperature, with thermal shutdown triggering at 168°C and 20°C hysteresis. This Grade 1 AEC-Q100 qualification enables under-hood deployment in engine control units and radar modules where ambient temperatures exceed 105°C.
Does the LMR43620MSC5RPERQ1 support external frequency synchronization?
Yes, the LMR43620MSC5RPERQ1 supports external clock synchronization via its MODE/SYNC pin, accepting input frequencies from 0.2MHz to 2.5MHz. When synchronized, it locks phase to the external clock's rising edge and remains in FPWM mode, maintaining constant frequency even at light loads.
What is the typical quiescent current of the LMR43620MSC5RPERQ1 at no load?
The LMR43620MSC5RPERQ1 draws 2.0µA typical non-switching input current at 13.5VIN, 0A load, and room temperature in auto mode. At 150°C junction temperature, total IQ remains below 2.5µA-enabling multi-year battery standby in always-on telematics and ADAS camera systems.
How does the PGOOD function behave during startup of the LMR43620MSC5RPERQ1?
The LMR43620MSC5RPERQ1 asserts PGOOD high 2.5ms after EN goes high, once VOUT/FB reaches 90% of its 5.00V target. The open-drain output requires a pull-up resistor; it remains low during soft-start and transitions cleanly without glitch, eliminating need for external reset supervisors in automotive ECUs.
Is the LMR43620MSC5RPERQ1 pin-compatible with other devices in the LMR436x0-Q1 family?
Yes, the LMR43620MSC5RPERQ1 shares identical 9-pin RPE (2mm × 2mm) HotRod™ QFN packaging and pinout with all LMR436x0-Q1 variants-including LMR43620MSC3RPERQ1 (3.3V), LMR43620RS5QRPERQ1 (adjustable FSW), and LMR43610-Q1 series-enabling scalable power design and BOM reuse across 1A/2A and 3.3V/5V configurations.
LMR43620MSC5RPERQ1 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:
- 2A
- 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)
LMR43620MSC5RPERQ1 FAQ
1.How can I place an order for LMR43620MSC5RPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR43620MSC5RPERQ1 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 LMR43620MSC5RPERQ1 reliable?
The price and inventory of LMR43620MSC5RPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR43620MSC5RPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR43620MSC5RPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR43620MSC5RPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR43620MSC5RPERQ1?
LMR43620MSC5RPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR43620MSC5RPERQ1 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 LMR43620MSC5RPERQ1?
For technical support, including LMR43620MSC5RPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR43620MSC5RPERQ1 requirements.
6.How does Aetrix verify that LMR43620MSC5RPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR43620MSC5RPERQ1 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 LMR43620MSC5RPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR43620MSC5RPERQ1?
All LMR43620MSC5RPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR43620MSC5RPERQ1, 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 LMR43620MSC5RPERQ1 part is unused and in its original packaging.
Return procedure for LMR43620MSC5RPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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