My Inquiry
My Account
Texas Instruments LMR43606MSC3RPERQ1
- Part No.:
- LMR43606MSC3RPERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
LMR43606MSC3RPERQ1.pdf
- Description:
- IC REG BUCK ADJ/1V 600MA 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,209
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMR43606MSC3RPERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 0.6A output at fixed 3.3V or adjustable VOUT, operating from 3.0V–36V input with 42V load-dump tolerance, featuring <2.5µA quiescent current at 150°C TJMAX and integrated spread spectrum for ultra-low EMI in ADAS radar ECUs.
For engineers reviewing the LMR43606MSC3RPERQ1 datasheet, LMR43606MSC3RPERQ1 pinout, LMR43606MSC3RPERQ1 application, or LMR43606MSC3RPERQ1 equivalent, key selection considerations include its 2mm × 2mm HotRod™ QFN package with wettable flanks, MODE/SYNC pin for FPWM/autoswitching mode control and external clock synchronization, fixed 2.2MHz switching frequency, and functional safety documentation support.
Technical Context
The LMR43606MSC3RPERQ1 implements peak current mode control with internal compensation, enabling minimal output capacitance and simplified layout. Its dual random spread spectrum dithering and optimized HotRod™ pinout suppress peak EMI emissions without requiring common-mode chokes or shielding.
It supports seamless auto-mode (PFM) to FPWM transition with frequency foldback below 1mA load, achieving 1.5µA no-load IQ at 13.5VIN while maintaining >85% efficiency at 1mA. The MODE/SYNC pin enables user-selectable PFM/FPWM operation or synchronization to an external 0.2–2.5MHz clock signal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V–36V continuous, supports 42V transients - handles automotive cold-crank (3V) and load-dump events without external protection. |
| Output Current | 0.6A continuous DC - sufficient for low-power domain supplies in radar sensors and infotainment subsystems. |
| Quiescent Current | <2.5µA at TJ = 150°C - enables always-on functionality in vehicle security and telematics modules with minimal battery drain. |
| Switching Frequency | Fixed 2.2MHz - avoids AM radio band, enables compact 1µH inductors and reduces solution footprint. |
| Output Voltage | Fixed 3.3V ±1% over –40°C to +125°C ambient - eliminates external feedback resistors and improves regulation stability. |
| Package | 2mm × 2mm VQFN-HR (RPE), 9-pin HotRod™ with wettable flanks - supports automated optical inspection and high-reliability solder joints in automotive PCBs. |
| Thermal Limit | Junction temperature up to +150°C - qualified for under-hood and engine bay applications per AEC-Q100 Grade 1. |
Pinout & Package
LMR43606MSC3RPERQ1 uses a 9-pin, 2mm × 2mm VQFN-HR (RPE) HotRod™ package with wettable flanks and corner anchor pads for enhanced solder joint reliability in automotive thermal cycling environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MODE/SYNC | Digital control input | Selects PFM/FPWM mode or synchronizes switching to external 0.2–2.5MHz clock; must not be floated. |
| 2 - PGOOD | Open-drain status flag | Asserts high when VOUT is within ±4% of target; includes 2.5ms delay and 40µs deglitching for robust system reset sequencing. |
| 3 - EN/UVLO | Enable & undervoltage lockout | Starts regulation when VIN ≥ 3.35V; shuts down at VIN ≤ 2.7V; supports direct connection to VIN for simple enable logic. |
| 4 - VIN | Main power input | Accepts 3.0–36V with 42V transient tolerance; requires local high-quality bypass capacitor to GND. |
| 5 - SW | Power switch node | Connects to external inductor; carries high di/dt; layout critical for EMI and efficiency. |
| 6 - BOOT | High-side gate driver supply | Requires 100nF ceramic capacitor between BOOT and SW to sustain high-side MOSFET drive during conduction. |
| 7 - VCC | Internal LDO output | 3.3V ±3% regulated supply for internal circuitry; decoupled with 1µF to GND; not for external loading. |
| 8 - VOUT/FB | Output voltage sense / feedback | Configured as fixed 3.3V output; connects directly to VOUT node - no external resistor divider needed. |
| 9 - GND | Power ground | Primary return path for VIN, SW, and VOUT currents; must be connected to system ground with short, wide traces. |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety Documentation Support | Available FIT data, FMEA reports, and safety analysis documentation to accelerate ISO 26262 ASIL-B system certification. |
| Ultra-Low Quiescent Current | 1.5µA at 13.5VIN and no load - extends battery life in always-on vehicle modules such as eCall and intrusion detection. |
| Integrated Spread Spectrum | Dual-random frequency dithering reduces peak EMI by >10dB - eliminates need for external EMI filters in cost-sensitive ADAS designs. |
| Pin-Selectable Light-Load Mode | MODE/SYNC pin configures auto (PFM) or forced PWM (FPWM) operation - balances efficiency vs. output ripple based on real-time system demand. |
| HotRod™ Package with Wettable Flanks | 2mm × 2mm QFN with exposed thermal pad and solderable side flanks - enables AOI verification and improves thermal resistance (RθJB = 26.1°C/W). |
Applications
| Radar Sensor Power Supply | Infotainment Head Unit Core Rail |
|---|---|
|
Use Scenario: Powers 77GHz radar transceiver ASICs in forward collision warning and adaptive cruise control systems. IC Role / Device Role / Timing Role: Primary 3.3V domain regulator supplying analog front-end, DSP core, and CAN FD interface. Use Value: Fixed 3.3V output with ±1% accuracy ensures stable ADC reference and PLL lock; 2.2MHz switching avoids interference with radar chirp frequencies. |
Use Scenario: Supplies low-noise 3.3V rail to audio codec, touch controller, and display timing ICs in automotive head units. IC Role / Device Role / Timing Role: Secondary buck converter downstream of main 5V rail, providing clean, regulated power for mixed-signal peripherals. Use Value: Ultra-low EMI design prevents audible noise in audio amplifiers; <2.5µA IQ enables quick wake-from-sleep response for voice-activated UI. |
| eCall Telematics Module | Body Control Module Subsystem |
|
Use Scenario: Powers GSM/LTE modem, GPS receiver, and accelerometer in emergency call systems requiring 10-year battery standby. IC Role / Device Role / Timing Role: Always-on buck regulator maintaining 3.3V supply to MCU and cellular baseband during vehicle ignition-off state. Use Value: 1.5µA no-load IQ minimizes parasitic drain; AEC-Q100 Grade 1 qualification ensures reliable operation across –40°C to +125°C ambient. |
Use Scenario: Generates 3.3V for LIN transceivers, LED drivers, and door module MCUs in centralized body electronics architecture. IC Role / Device Role / Timing Role: Distributed point-of-load regulator replacing discrete LDOs to improve efficiency and reduce thermal load. Use Value: 0.6A output supports multiple LIN nodes simultaneously; 42V load-dump tolerance eliminates need for upstream TVS diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR43606MSC5RPERQ1 | Fixed 5V output instead of 3.3V; identical pinout, package, and electrical specs otherwise. | Used where 5V logic rails or USB peripheral interfaces require primary regulation. | Select when system architecture mandates 5V core voltage instead of 3.3V - no layout or firmware changes required. |
| LMR43610MSC3RPERQ1 | 1A output current rating; same 3.3V fixed output, 2.2MHz frequency, and MODE/SYNC functionality. | Suitable for higher-current domains like camera ISPs or multi-core MCUs needing >0.6A. | Choose for future-proofing or when peak load exceeds 0.6A; shares identical footprint and control interface. |
Compared with LMR43606MSC5RPERQ1, the LMR43606MSC3RPERQ1 provides tighter regulation for 3.3V-sensitive analog circuits; versus LMR43610MSC3RPERQ1, it offers lower BOM cost and thermal margin for sub-0.6A loads while retaining identical EMI performance and functional safety support.
Availability
LMR43606MSC3RPERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (radar ECU), infotainment head units, and body electronics modules requiring stable component supply with AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for LMR43606MSC3RPERQ1 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 and embedded processing technologies, with deep expertise in automotive-grade power management ICs and functional safety solutions.
The LMR43606MSC3RPERQ1 belongs to TI's LMR436xx-Q1 family of automotive buck converters, designed specifically for ultra-low-IQ, low-EMI power delivery in space-constrained ADAS, infotainment, and body electronics applications.
FAQ
What is the maximum junction temperature rating for the LMR43606MSC3RPERQ1?
The LMR43606MSC3RPERQ1 is rated for operation up to +150°C junction temperature, fully qualified per AEC-Q100 Grade 1 (–40°C to +125°C ambient) and validated for extended thermal stress in under-hood automotive environments. This rating enables reliable use in radar sensors and engine control modules where ambient temperatures exceed 105°C.
Does the LMR43606MSC3RPERQ1 support external frequency synchronization?
Yes, the LMR43606MSC3RPERQ1 supports external clock synchronization via its MODE/SYNC pin, accepting input signals from 0.2MHz to 2.5MHz. When synchronized, the device locks its switching edge to the rising edge of the external clock and operates in FPWM mode, maintaining full-frequency regulation even at light loads without entering PFM.
What output voltage options does the LMR43606MSC3RPERQ1 support?
The LMR43606MSC3RPERQ1 supports fixed 3.3V output - the "3" in the part number denotes this configuration. It does not support adjustable output or 5V fixed variants; those are separate orderables (e.g., LMR43606MSC5RPERQ1). The VOUT/FB pin is internally configured for 3.3V, eliminating external feedback resistors.
How does the LMR43606MSC3RPERQ1 achieve ultra-low EMI performance?
The LMR43606MSC3RPERQ1 achieves ultra-low EMI through three integrated features: dual-random spread spectrum dithering (±4% frequency modulation), a bond-wire-free HotRod™ QFN package that minimizes parasitic inductance, and an optimized pinout that reduces high-di/dt loop area. Together, these eliminate the need for external EMI filters in most automotive applications.
Is the LMR43606MSC3RPERQ1 pin-compatible with other devices in the LMR436xx-Q1 family?
Yes, the LMR43606MSC3RPERQ1 is pin-compatible with the LMR43610-Q1 (1A), LMR36506-Q1 (65V, 600mA), and LMR36503-Q1 (65V, 300mA) - all share the same 2mm × 2mm RPE package and identical pin assignments. This allows scalable power design with minimal PCB redesign when upgrading current capability or input voltage range.
LMR43606MSC3RPERQ1 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 (3.3V)
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (2x2)
LMR43606MSC3RPERQ1 FAQ
1.How can I place an order for LMR43606MSC3RPERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR43606MSC3RPERQ1 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 LMR43606MSC3RPERQ1 reliable?
The price and inventory of LMR43606MSC3RPERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR43606MSC3RPERQ1 is usually 5 days.
3.What payment methods are accepted for LMR43606MSC3RPERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR43606MSC3RPERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR43606MSC3RPERQ1?
LMR43606MSC3RPERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR43606MSC3RPERQ1 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 LMR43606MSC3RPERQ1?
For technical support, including LMR43606MSC3RPERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR43606MSC3RPERQ1 requirements.
6.How does Aetrix verify that LMR43606MSC3RPERQ1 is sourced from the original manufacturer or authorized distributors?
All LMR43606MSC3RPERQ1 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 LMR43606MSC3RPERQ1 meets industry standards.
7.What is the process for return or replacement of LMR43606MSC3RPERQ1?
All LMR43606MSC3RPERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR43606MSC3RPERQ1, 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 LMR43606MSC3RPERQ1 part is unused and in its original packaging.
Return procedure for LMR43606MSC3RPERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR43606MSC3RPERQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
