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Texas Instruments LMR43610RS5QRPERQ1
- Part No.:
- LMR43610RS5QRPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR43610RS5QRPERQ1.pdf
- Description:
- IC REG BUCK ADJ/5V 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
LMR43610RS5QRPERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 1A output current with fixed 5V output, 3.0–36V input range, <2.5µA quiescent current at 150°C TJ, and integrated spread spectrum for CISPR25 Class 5 compliance-designed for radar ECU power rails.
For engineers reviewing the LMR43610RS5QRPERQ1 datasheet, LMR43610RS5QRPERQ1 pinout, LMR43610RS5QRPERQ1 application, or LMR43610RS5QRPERQ1 equivalent, key selection criteria include ultra-low IQ at high junction temperature, RT-pin-adjustable 200kHz–2.2MHz switching frequency, HotRod™ QFN package with wettable flanks, and functional safety documentation support.
Technical Context
The LMR43610RS5QRPERQ1 uses peak current mode control with internal compensation to minimize external components and output capacitance. Its dual random spread spectrum dithering and optimized HotRod™ pinout reduce peak EMI emissions without requiring common-mode chokes.
It supports auto mode (PFM) for light-load efficiency and FPWM mode via MODE/SYNC pin configuration, though this variant uses RT pin for frequency adjustment-not MODE/SYNC-enabling 200kHz–2.2MHz tuning with a single resistor while maintaining fixed 5V output and <2.5µA IQ at 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous DC output-supports automotive body electronics and infotainment subsystems with stable load regulation. |
| Input Voltage Range | 3.0V to 36V with 42V transient tolerance-handles cold-crank (3V) and load-dump (42V) events in 12V/24V automotive systems. |
| Quiescent Current | 2.0µA typical at VIN=13.5V, VOUT=5V, auto mode-enables always-on functionality in ADAS modules without battery drain. |
| Switching Frequency | Adjustable 200kHz–2.2MHz via RT pin resistor-avoids noise-sensitive bands and enables compact magnetics selection. |
| Output Voltage | Fixed 5.00V ±0.6% over full temperature and line range-eliminates external feedback resistors and improves accuracy vs. adjustable variants. |
| Junction Temperature | –40°C to +150°C operating range-qualified for under-hood and radar ECU environments per AEC-Q100 Grade 1. |
| EMI Performance | CISPR25 Class 5 compliant with integrated spread spectrum-reduces need for external EMI filters and shielding in compact PCB layouts. |
Pinout & Package
LMR43610RS5QRPERQ1 uses a 9-pin, 2mm × 2mm VQFN-HR (RPE) HotRod™ package with wettable flanks for optical solder inspection and enhanced thermal performance (RθJB = 26.1°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RT | Frequency setting input | Connects to resistor-to-GND to set switching frequency from 200kHz to 2.2MHz; no MODE/SYNC function on this variant. |
| 2 - PGOOD | Open-drain power-good flag | Signals regulated output status with 2.5ms delay and 40µs deglitch; eliminates need for external reset supervisor IC. |
| 3 - EN/UVLO | Enable and undervoltage lockout input | Logic-controlled ON/OFF with precision thresholds (VEN-WAKE = 0.5V, VEN-VOUT = 1.23V); supports direct VIN connection. |
| 4 - VIN | Main input power supply | Accepts 3.0–36V with 42V transient rating; requires local high-quality bypass capacitor for stability and EMI suppression. |
| 5 - SW | Switch node | Connects to power inductor; carries high di/dt; layout critical for EMI and efficiency. |
| 6 - BOOT | Bootstrap supply for high-side driver | Requires 100nF ceramic capacitor between BOOT and SW to sustain gate drive during HS conduction. |
| 7 - VCC | Internal LDO output | 3.3V internal supply for control circuitry; decoupled with 1µF capacitor to GND; not for external loading. |
| 8 - VOUT/FB | Fixed 5V output / feedback node | Direct connection to output rail for fixed 5V operation; no external divider required-improves accuracy and reduces BOM count. |
| 9 - GND | Power ground | Primary return path for high-current loops; must be connected to CIN with short, wide traces to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 2.0µA at 13.5VIN, 5VOUT, auto mode-enables >10-year battery standby in always-on automotive modules. |
| Integrated spread spectrum | Dual random dithering reduces peak EMI by >10dB-meets CISPR25 Class 5 without added filtering components. |
| HotRod™ QFN package | 2mm × 2mm footprint with wettable flanks and corner anchor pins-enables automated optical inspection and robust solder joints. |
| Internal compensation | No external compensation network required-reduces design time and component count while maintaining stability across all loads. |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration-covers FIT rate, failure modes, and diagnostic coverage analysis. |
Applications
| Radar ECU Power Supply | Infotainment Head Unit Core Rail |
|---|---|
Use Scenario: Powers MMIC-based 77GHz radar transceivers in ADAS front-end modules requiring low-noise, always-on 5V supply. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean 5V at up to 1A with <2.5µA IQ to maintain radar wake-up readiness. Use Value: Enables sub-2.5µA system sleep current while sustaining fast wake-up response and meeting CISPR25 Class 5 radiated emissions limits. |
Use Scenario: Supplies core logic voltage to SoC and display controller in automotive head units with variable load profiles. IC Role / Device Role / Timing Role: Fixed 5V step-down converter supporting dynamic load steps from 10mA to 1A with seamless PFM-to-PWM transition. Use Value: Delivers >85% efficiency at 1mA and >92% at 1A-reducing thermal load in sealed enclosures and extending display lifetime. |
| Body Control Module (BCM) Subsystem | eCall Telematics Power Management |
Use Scenario: Provides regulated 5V rail for LIN gateway, LED drivers, and sensor interfaces in centralized BCM designs. IC Role / Device Role / Timing Role: High-reliability buck converter operating from 3V cold-crank to 42V load-dump transients. Use Value: Eliminates need for external TVS or pre-regulator stages-reducing solution size by 35% and bill-of-material cost by $0.42. |
Use Scenario: Powers GNSS receiver, cellular modem, and backup SRAM in emergency call (eCall) systems requiring fail-safe operation. IC Role / Device Role / Timing Role: Functional safety-capable 5V regulator with PGOOD monitoring and thermal shutdown (168°C trip). Use Value: Supports ASIL-B diagnostics via documented FIT rate and fault tree analysis-accelerating eCall certification cycle by 4 weeks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR43610RS3QRPERQ1 | Same package and pinout; fixed 3.3V output instead of 5V; identical IQ, frequency adjustability, and thermal specs. | Used where 3.3V logic rails dominate (e.g., MCU cores), not 5V peripherals or analog sensors. | Select when system requires 3.3V output with identical size, efficiency, and automotive qualification. |
| LMR43620RS5QRPERQ1 | Same pinout and 5V fixed output, but rated for 2A output current; higher peak/valley current limits (2.8A/1.9A vs. 1.8A/1.1A). | Suitable for higher-power ADAS cameras or domain controllers needing >1A, with margin for future derating. | Choose when load current exceeds 1A or long-term reliability margin above 1A is required-same layout, no redesign needed. |
Compared with LMR43610RS5QRPERQ1, the LMR43610RS3QRPERQ1 offers identical performance at 3.3V for logic rails, while LMR43620RS5QRPERQ1 provides 2A capability in the same footprint-enabling scalable power design across vehicle platforms without changing PCB layout.
Availability
LMR43610RS5QRPERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems, infotainment head units, and body electronics requiring stable component supply across automotive production lifecycles.
Supply support for LMR43610RS5QRPERQ1 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.
The LMR436x0-Q1 product line delivers compact, low-IQ buck converters for automotive subsystems demanding high reliability, EMI robustness, and functional safety support-targeting radar, infotainment, and body electronics.
FAQ
What is the maximum junction temperature rating for LMR43610RS5QRPERQ1?
The LMR43610RS5QRPERQ1 is rated for continuous operation from –40°C to +150°C junction temperature and features thermal shutdown at 168°C (typical). This AEC-Q100 Grade 1 qualification ensures reliable performance in under-hood and radar ECU environments where ambient temperatures exceed 125°C. The device maintains <2.5µA IQ even at 150°C TJ.
Does LMR43610RS5QRPERQ1 support external frequency synchronization?
No, LMR43610RS5QRPERQ1 does not support external synchronization. It is an RT-pin variant-frequency is adjusted via a resistor from RT to GND (200kHz–2.2MHz)-and lacks the MODE/SYNC pin functionality found in MSC variants. For sync capability, consider LMR43610MSC5RPERQ1, which uses the MODE/SYNC pin for external clock locking.
What is the output voltage accuracy of LMR43610RS5QRPERQ1 over temperature and line?
LMR43610RS5QRPERQ1 delivers 5.00V ±0.6% output voltage accuracy over the full operating range: VIN = 5.5V to 36V and TJ = –40°C to +150°C in FPWM mode. This is achieved via factory-trimmed internal reference (VFB = 1.00V ±1%) and fixed-output architecture-no external feedback resistors required, eliminating resistor tolerance drift.
Can LMR43610RS5QRPERQ1 operate during automotive cold-crank conditions?
Yes, LMR43610RS5QRPERQ1 supports input voltages as low as 3.0V after startup and 3.35V minimum for start-up-fully compatible with 12V automotive cold-crank events down to 3V. Its peak current limit (1.8A typ) and low dropout behavior (VDROP1 = 0.2V at 1A) ensure uninterrupted 5V output regulation during cranking transients.
Is LMR43610RS5QRPERQ1 pin-compatible with other devices in the LMR436x0-Q1 family?
Yes, LMR43610RS5QRPERQ1 shares the identical 9-pin RPE (2mm × 2mm) HotRod™ QFN package and pinout with all LMR436x0-Q1 variants-including LMR43620RS5QRPERQ1, LMR43610RS3QRPERQ1, and LMR43610MSC5RPERQ1-enabling drop-in replacement for 1A/5V, 2A/5V, 1A/3.3V, or MODE/SYNC variants without PCB changes.
LMR43610RS5QRPERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-PowerVFQFN
- Packaging:
- Bulk
- 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:
- 200kHz ~ 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)
LMR43610RS5QRPERQ1 FAQ
1.How can I place an order for LMR43610RS5QRPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR43610RS5QRPERQ1 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 LMR43610RS5QRPERQ1 reliable?
The price and inventory of LMR43610RS5QRPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR43610RS5QRPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR43610RS5QRPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR43610RS5QRPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR43610RS5QRPERQ1?
LMR43610RS5QRPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR43610RS5QRPERQ1 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 LMR43610RS5QRPERQ1?
For technical support, including LMR43610RS5QRPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR43610RS5QRPERQ1 requirements.
6.How does Aetrix verify that LMR43610RS5QRPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR43610RS5QRPERQ1 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 LMR43610RS5QRPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR43610RS5QRPERQ1?
All LMR43610RS5QRPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR43610RS5QRPERQ1, 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 LMR43610RS5QRPERQ1 part is unused and in its original packaging.
Return procedure for LMR43610RS5QRPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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