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Texas Instruments LMR23630FQDRRRQ1
- Part No.:
- LMR23630FQDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630FQDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LMR23630FQDRRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 3-A synchronous step-down DC/DC converter in a 12-pin WSON package with wettable flanks, featuring adjustable switching frequency (150–2425 kHz), FPWM mode for constant-frequency operation, and 75-μA quiescent current in PFM mode - designed for automotive infotainment power rails requiring high efficiency at light load and robust thermal performance.
For engineers reviewing the LMR23630FQDRRRQ1 datasheet, LMR23630FQDRRRQ1 pinout, LMR23630FQDRRRQ1 application, or LMR23630FQDRRRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed efficiency curves across 12 V/24 V/36 V inputs, real-world thermal metrics (RθJA = 41.5°C/W), and two rigorously cross-checked alternative parts with documented functional and packaging differences.
Technical Context
The LMR23630FQDRRRQ1 implements fixed-frequency peak-current-mode control with internal compensation, enabling stable regulation using only external inductor, input/output capacitors, and feedback resistors. Its FPWM mode eliminates light-load frequency variation, ensuring consistent EMI profile and tight output voltage regulation (±1% reference accuracy over –40°C to +125°C).
This variant includes EN/SYNC functionality for precise system power sequencing and external clock synchronization (200 kHz–2.2 MHz), while omitting the PGOOD pin and RT pin - confirming its identity as the FPWM-enabled, frequency-adjustable WSON-12 variant without power-good flag or frequency-setting resistor interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery rails including cold-crank (4.5 V) and load-dump (36 V) transients. |
| Output Current | 3 A continuous - delivers full rated current with thermal derating governed by RθJA = 41.5°C/W in WSON package. |
| Switching Frequency | Adjustable 150–2425 kHz - enables optimization of size (higher fSW) vs. efficiency (lower fSW) and EMI filtering requirements. |
| IQ (PFM Mode) | 75 μA at no load - extends battery runtime in always-on automotive modules such as telematics or HUD controllers. |
| Min. On-Time | 60 ns - supports high-duty-cycle operation (e.g., 5 V out from 6 V in) and low-VOUT regulation down to 1 V. |
| Voltage Reference | 1.0 V ±1% (–40°C to +125°C) - ensures accurate output setting via FB divider with minimal temperature-induced drift. |
| Protection Features | Cycle-by-cycle current limit, hiccup-mode short-circuit protection, thermal shutdown (162–178°C), and VIN/VCC UVLO - enables autonomous fault recovery in unattended systems. |
Pinout & Package
LMR23630FQDRRRQ1 is housed in a 3.0 mm × 3.0 mm, 12-pin WSON package with wettable flanks and exposed thermal pad (DRR package). The pinout matches the WSON variant with RT pin (Pin 6), and excludes PGOOD - consistent with TI's orderable addendum identifying FQDRRRQ1 as the FPWM + adjustable-frequency option without power-good output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | Connects to drain of internal high-side and low-side MOSFETs; requires low-inductance path to power inductor. |
| 3 BOOT | Bootstrap supply | Bias for high-side gate driver; requires 100-nF ceramic capacitor between BOOT and SW. |
| 4 VCC | Internal LDO output | Provides ~4.1 V bias for control circuitry; must be bypassed with 2.2-μF capacitor to AGND - no external loading permitted. |
| 5 FB | Feedback input | Senses output voltage via resistor divider; precision 1-V reference enables accurate VOUT setting from 1 V to 28 V. |
| 6 RT | Frequency programming | Resistor-to-AGND sets switching frequency (150–2425 kHz); floating defaults to ~400 kHz - not shorted to ground. |
| 7 AGND | Analog ground | Reference for internal comparators and reference; separate from PGND but connected on PCB via low-impedance path. |
| 8, 9 VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor placed near pins with shortest possible trace to PGND. |
| 10 EN/SYNC | Enable & sync input | Logic-level enable (1.4–1.7 V threshold); also accepts AC-coupled external clock (2.8–5.5 V, 200 kHz–2.2 MHz) for EMI reduction. |
| 11 NC | No connect | Not internally bonded; must remain unconnected and unpopulated on PCB. |
| 12 PGND | Power ground | Low-side MOSFET source return; connects directly to thermal pad; requires solid copper pour under package. |
| 13 PAD | Thermal pad | Primary heat dissipation path; must be soldered to large PCB ground plane with ≥4 thermal vias (0.3-mm diameter). |
Key Features
| Feature | Design Value |
|---|---|
| FPWM light-load operation | Maintains fixed 400-kHz (or user-set) frequency under all loads - eliminates audible noise and simplifies EMI filter design. |
| Internal loop compensation | Eliminates need for external Type-II/III compensation network - reduces BOM count and layout sensitivity. |
| Soft-start into prebiased output | Prevents reverse current flow when enabling into powered rail - critical for hot-swap and multi-rail sequencing. |
| Wettable flank WSON package | Enables automated optical inspection (AOI) of solder joints - improves manufacturing yield in automotive-grade assembly. |
| High duty-cycle capability | Supports >90% duty cycle (e.g., 5 V out from 5.5 V in) due to 60-ns minimum on-time - ideal for post-regulation stages. |
Applications
| Automotive Cluster Power Supply | USB-C Automotive Charging Port |
|---|---|
|
Use Scenario: Powers TFT-LCD display, microcontroller, and CAN transceiver in digital instrument cluster with 12-V battery input subject to cold-crank and load-dump events. IC Role / Device Role / Timing Role: Primary 5-V/3.3-V step-down regulator delivering 3-A peak current with FPWM mode ensuring stable timing for display refresh and CAN frame transmission. Use Value: 75-μA quiescent current extends sleep-mode battery life; 36-V max input withstands 30-V load-dump transients per ISO 7637-2; wettable flanks ensure AOI-verified solder joints for ASIL-B compliance. |
Use Scenario: Generates 5-V/3-A USB Power Delivery (PD) bus from vehicle's 12-V battery, supporting BC1.2 and USB-C charging protocols. IC Role / Device Role / Timing Role: Constant-frequency buck converter supplying regulated 5 V to USB port controller IC, synchronized to system clock to minimize conducted EMI in shared harnesses. Use Value: Adjustable frequency avoids AM radio band (530–1710 kHz); hiccup-mode protection prevents thermal runaway during cable short; 4-V min input supports start-stop engine operation. |
| ADAS Camera Module Bias Rail | Telematics Control Unit (TCU) Core Supply |
|
Use Scenario: Provides clean, low-noise 3.3-V supply to image sensor and ISP in rear-view or surround-view camera, mounted near engine bay with ambient temperatures up to +105°C. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator operating in FPWM mode to eliminate switching frequency modulation that could couple into analog video signals. Use Value: 1-V reference accuracy (±1%) ensures stable sensor bias; RθJA = 41.5°C/W enables 3-A operation at +105°C ambient with standard 2-layer PCB; AEC-Q100 Grade 1 qualification covers full automotive temperature range. |
Use Scenario: Supplies 1.2-V core voltage to ARM Cortex-A series processor in cellular-connected TCU, requiring ultra-low IQ during cellular idle states. IC Role / Device Role / Timing Role: Pre-regulator stepping 12 V down to 3.3 V, feeding secondary low-dropout regulator (LDO) for processor core - FPWM ensures predictable power-state transitions. Use Value: 75-μA IQ minimizes standby power draw; soft-start into prebiased load prevents brownout during LTE modem wake-up; EN/SYNC allows precise coordination with cellular baseband timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23630AQDDARQ1 | SOIC-8 package; fixed 400-kHz frequency; no FPWM or frequency adjustment; includes PGOOD pin. | Preferred where board space permits larger SOIC, power-good monitoring is required, and EMI filtering targets fixed 400-kHz fundamental. | Select when PGOOD signal is mandatory for system health monitoring and layout constraints allow SOIC footprint. |
| LMR23625FQDRRRQ1 | Same WSON-12 package and FPWM/adjustable-frequency features, but rated for 2.5-A continuous output. | Used where thermal margin or future-proofing demands lower current rating with identical pinout and control interface. | Choose for cost-sensitive designs needing reduced current headroom or where 2.5-A suffices with identical layout reuse. |
Compared with LMR23630FQDRRRQ1, LMR23630AQDDARQ1 trades WSON miniaturization and FPWM flexibility for PGOOD visibility and SOIC manufacturability, while LMR23625FQDRRRQ1 retains full pin compatibility and feature parity at a 0.5-A lower current rating - enabling drop-in derating without layout change.
Availability
LMR23630FQDRRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB-C vehicle charging, and ADAS camera module designs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LMR23630FQDRRRQ1 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 power management ICs, with deep expertise in automotive-grade reliability and functional safety.
The LMR23630FQDRRRQ1 belongs to TI's SIMPLE SWITCHER® automotive DC/DC converter family, engineered specifically for harsh-environment vehicle subsystems demanding high input voltage tolerance, low quiescent current, and AEC-Q100 compliance.
FAQ
What is the package type and thermal performance of the LMR23630FQDRRRQ1?
The LMR23630FQDRRRQ1 uses a 3.0 mm × 3.0 mm, 12-pin WSON package with wettable flanks and an exposed thermal pad. Its junction-to-ambient thermal resistance is 41.5°C/W, and junction-to-board is 16.5°C/W - enabling 3-A continuous operation on standard 2-layer PCBs with proper thermal vias under the pad. This package supports automated optical inspection for automotive manufacturing traceability.
Does the LMR23630FQDRRRQ1 support synchronization to an external clock?
Yes, the LMR23630FQDRRRQ1 supports external clock synchronization via its EN/SYNC pin. An AC-coupled square wave (2.8–5.5 V amplitude, 200 kHz–2.2 MHz) can be injected through a small coupling capacitor to lock the internal oscillator - reducing EMI peaks and enabling deterministic timing in multi-converter systems. This function operates independently of the FPWM mode selection.
What is the minimum input voltage required for the LMR23630FQDRRRQ1 to operate?
The LMR23630FQDRRRQ1 has a specified minimum input voltage of 4 V, with undervoltage lockout (UVLO) rising threshold at 3.3–3.9 V and falling threshold at 2.9–3.5 V. This allows reliable startup from automotive batteries during cranking events down to ~4.5 V, and supports stop-start systems where input may dip transiently below 6 V while maintaining regulation.
How does the FPWM mode affect efficiency and output ripple in the LMR23630FQDRRRQ1?
In FPWM mode, the LMR23630FQDRRRQ1 maintains constant switching frequency across all load conditions, resulting in higher light-load output voltage ripple compared to PFM mode - but with significantly improved regulation accuracy and predictable EMI spectrum. Efficiency drops ~2–5% at very light loads (<10 mA) versus PFM, yet remains >85% at 100 mA with 12-V input and 5-V output.
Can the LMR23630FQDRRRQ1 be used to generate output voltages below 1 V?
No - the LMR23630FQDRRRQ1's internal reference is fixed at 1.0 V ±1%, and the FB pin is designed for resistor-divider-based output setting where VOUT = 1 V × (1 + RFBT/RFBB). The datasheet specifies a minimum output voltage of 1 V; attempting sub-1-V operation violates the reference architecture and is not characterized or supported.
LMR23630FQDRRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz ~ 2.425MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-SON (3x3)
LMR23630FQDRRRQ1 FAQ
1.How can I place an order for LMR23630FQDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630FQDRRRQ1 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 LMR23630FQDRRRQ1 reliable?
The price and inventory of LMR23630FQDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630FQDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630FQDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630FQDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630FQDRRRQ1?
LMR23630FQDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630FQDRRRQ1 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 LMR23630FQDRRRQ1?
For technical support, including LMR23630FQDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630FQDRRRQ1 requirements.
6.How does Aetrix verify that LMR23630FQDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630FQDRRRQ1 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 LMR23630FQDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630FQDRRRQ1?
All LMR23630FQDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630FQDRRRQ1, 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 LMR23630FQDRRRQ1 part is unused and in its original packaging.
Return procedure for LMR23630FQDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23630FQDRRRQ1 Tags
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