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Texas Instruments LMR23630AFQDDARQ1
- Part No.:
- LMR23630AFQDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23630AFQDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:493
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Product details
Overview
LMR23630AFQDDARQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 3-A synchronous step-down DC/DC converter in 8-pin HSOIC package, delivering up to 3 A continuous output current with 4–36 V input range, 400 kHz fixed switching frequency, and FPWM light-load mode for low output ripple - used in automotive infotainment power rails and USB charging modules.
For engineers reviewing the LMR23630AFQDDARQ1 datasheet, LMR23630AFQDDARQ1 pinout, LMR23630AFQDDARQ1 application, or LMR23630AFQDDARQ1 equivalent, key selection considerations include its FPWM-only operation (no PFM), absence of power-good flag, internal compensation, 60 ns minimum on-time, and qualification for –40°C to +125°C ambient automotive environments.
Technical Context
The LMR23630AFQDDARQ1 employs fixed-frequency peak-current-mode control with internal loop compensation, eliminating external compensation components. It operates exclusively in forced PWM (FPWM) mode - no PFM - ensuring constant 400 kHz switching and minimal output voltage ripple across load conditions.
It integrates high-side and low-side NMOS power switches with RDS(on) of 185 mΩ / 105 mΩ (HSOIC), supports soft-start into prebiased loads, and includes cycle-by-cycle current limiting, hiccup-mode short-circuit protection, and thermal shutdown at 170°C. The EN/SYNC pin enables system-level sequencing and external clock synchronization (200–2200 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports wide automotive battery transients and off-battery industrial supplies. |
| Output Current | 3 A continuous - sufficient for powering SoCs, displays, and USB PD companion circuits. |
| Switching Frequency | Fixed 400 kHz - enables predictable EMI filtering and compact magnetics without RT resistor. |
| Quiescent Current | 75 µA in FPWM mode - balances low-load efficiency with ripple performance in always-on systems. |
| Min. On-Time | 60 ns - supports high step-down ratios (e.g., 24 V → 3.3 V) without pulse-skipping artifacts. |
| Operating Temp. | –40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood and cockpit use. |
| Protection Features | Cycle-by-cycle current limit, hiccup-mode short-circuit, thermal shutdown, VIN/VCC UVLO - ensures robust field operation. |
Pinout & Package
LMR23630AFQDDARQ1 uses the 8-pin HSOIC (DDA) package with PowerPAD™, measuring 4.90 mm × 3.90 mm. Thermal pad (Pin 9) must be soldered to PCB ground plane for thermal management and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to power inductor; carries high di/dt switching current - requires tight layout and Kelvin connection. |
| BOOT | Bootstrap supply | Drives high-side MOSFET gate; requires 100 nF ceramic capacitor between BOOT and SW. |
| VCC | Bias LDO output | Internal 4.1 V LDO; bypass with 2.2 µF/16 V capacitor to AGND - no external loading permitted. |
| FB | Feedback input | Monitors output via resistor divider; precision 1.0 V reference enables accurate VOUT regulation. |
| EN/SYNC | Enable & sync input | Active-high enable (1.55 V threshold); also accepts AC-coupled external clock for frequency synchronization. |
| AGND | Analog ground | Reference for FB, EN/SYNC, and internal circuitry - connect to clean system ground, separate from PGND if possible. |
| VIN | Main input supply | Accepts 4–36 V; decouple with low-ESR CIN close to VIN and PGND pins. |
| PGND | Power ground | Low-side FET source return; tie directly to CIN/COUT grounds and thermal pad - forms primary current return path. |
Key Features
| Feature | Design Value |
|---|---|
| FPWM-only operation | Eliminates light-load frequency variation and output voltage ripple - critical for noise-sensitive analog/RF subsystems. |
| Internal compensation | Reduces BOM count by removing external Type II/III compensation network - accelerates design validation. |
| Soft-start into prebiased output | Prevents reverse current flow when enabling into powered bus - essential for hot-swap and rail-sequencing applications. |
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (–40°C to +125°C), HBM ±2000 V, and CDM Level C4B - supports ASIL-B system integration. |
| High duty-cycle capability | Supports >90% duty cycle (e.g., 36 V → 3.3 V) without dropout - enables single-stage conversion in wide-input systems. |
Applications
| Automotive Cluster Power Supply | USB-C Charging Module |
|---|---|
|
Use Scenario: Powers TFT-LCD display, microcontroller, and touch controller in digital instrument clusters with 12 V battery input. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V buck regulator supplying core logic and interface ICs; operates continuously during vehicle runtime. Use Value: FPWM mode ensures stable 5 V rail with <15 mVpp ripple under dynamic load steps - prevents display flicker and MCU resets. |
Use Scenario: Generates 5 V/3 A output for USB-C downstream ports in vehicle center console or rear-seat entertainment. IC Role / Device Role / Timing Role: Main DC/DC stage converting 12 V battery to regulated 5 V; synchronized to system clock to reduce conducted EMI. Use Value: 60 ns min-on-time enables direct 12 V → 5 V conversion without intermediate stages - reduces solution size and cost. |
| ADAS Camera Power Rail | Telematics Control Unit (TCU) Core Supply |
|
Use Scenario: Supplies clean 3.3 V to image sensor and ISP in forward-facing ADAS cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Point-of-load regulator delivering low-noise, thermally robust 3.3 V; enabled only during camera active state. Use Value: AEC-Q100 Grade 1 rating and 170°C thermal shutdown ensure reliable operation at +125°C ambient - avoids thermal derating. |
Use Scenario: Provides 1.8 V or 1.2 V core supply (via secondary LDO) to cellular modem and GNSS SoC in TCU modules. IC Role / Device Role / Timing Role: Primary buck stage feeding downstream LDOs; sequenced via EN/SYNC to match processor boot timing. Use Value: Precision enable (1.55 V threshold, 0.4 V hysteresis) enables accurate UVLO and power sequencing - prevents brownout lockup. |
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 | Same HSOIC package and 400 kHz fixed frequency, but supports PFM mode instead of FPWM - higher light-load efficiency, larger output ripple. | Preferred for battery-backed always-on modules where quiescent current dominates lifetime energy budget. | Select LMR23630AQDDARQ1 if low-noise is secondary to >90% efficiency at 1 mA load; avoid if ripple-sensitive ADCs or RF sections are present. |
| LMR23630FQDRRRQ1 | 12-pin WSON with RT pin - adjustable frequency (200–2200 kHz), FPWM mode, same 3 A rating - no power-good output. | Enables EMI optimization via frequency tuning and smaller inductors; wettable flank package improves solder joint inspection. | Choose LMR23630FQDRRRQ1 for space-constrained layouts requiring higher fSW or production testability; verify thermal performance vs. HSOIC. |
Compared with LMR23630AFQDDARQ1, the AQDDARQ1 trades ripple for ultra-low IQ in PFM, while the FQDRRRQ1 adds frequency flexibility and improved thermal metrics in WSON - all share identical control architecture and AEC-Q100 qualification, but differ in noise profile, layout footprint, and thermal resistance (RθJA = 42.0°C/W vs. 41.5°C/W).
Availability
LMR23630AFQDDARQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and general off-battery power applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LMR23630AFQDDARQ1 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 designing analog ICs, embedded processors, and connectivity solutions for automotive, industrial, and consumer markets.
The LMR23630-Q1 product line delivers SIMPLE SWITCHER® synchronous buck regulators optimized for automotive-grade reliability, ease of use, and minimal external component count in harsh environments.
FAQ
What distinguishes LMR23630AFQDDARQ1 from other variants in the LMR23630-Q1 family?
The LMR23630AFQDDARQ1 is the FPWM-only, fixed 400 kHz, HSOIC-packaged variant with no power-good output. Unlike the AQDDARQ1 (PFM-capable) or APQDRRRQ1 (PGOOD-enabled), it guarantees constant switching frequency and low output ripple at all loads - making it ideal for noise-sensitive applications like display power and camera sensors. Its SOIC package offers proven manufacturability and thermal performance in legacy automotive designs.
Does LMR23630AFQDDARQ1 support external frequency synchronization?
Yes, LMR23630AFQDDARQ1 supports external clock synchronization via the EN/SYNC pin. An AC-coupled square wave (2.8–5.5 V amplitude, ≥100 ns pulse width) can be injected through a small capacitor to lock the internal oscillator to an external source between 200 kHz and 2200 kHz - enabling EMI reduction and multi-rail phase alignment in complex automotive ECUs.
What is the recommended input capacitance for LMR23630AFQDDARQ1 in automotive applications?
For LMR23630AFQDDARQ1 in automotive applications, TI recommends ≥47 µF total input capacitance using low-ESR X7R/X5R ceramics (e.g., three 22 µF/25 V devices) placed within 5 mm of VIN and PGND pins. This minimizes voltage overshoot during load dump (ISO 7637-2 Pulse 5a) and ensures stable operation under cold-crank (4.5 V min). Add a bulk electrolytic (100 µF/50 V) if board space allows.
Can LMR23630AFQDDARQ1 operate with a 3.3 V output at 36 V input?
Yes, LMR23630AFQDDARQ1 supports 3.3 V output from 36 V input. Its 60 ns minimum on-time enables ~9.2% duty cycle (3.3/36), well above the practical limit. However, efficiency drops to ~75% at full 3 A load (per Figure D001), and thermal design must account for ~2.5 W dissipation - use adequate copper area on the thermal pad and consider airflow or heatsinking in sealed enclosures.
Is LMR23630AFQDDARQ1 compatible with WEBENCH® Power Designer?
Yes, LMR23630AFQDDARQ1 is fully supported in TI's WEBENCH® Power Designer. Users can enter input/output specifications, select LMR23630AFQDDARQ1, and generate complete schematics, BOMs, efficiency plots, thermal simulations, and PCB layout recommendations - including optimized inductor selection (e.g., 8.2 µH, 4.5 A saturation) and feedback resistor values for target VOUT.
LMR23630AFQDDARQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LMR23630AFQDDARQ1 FAQ
1.How can I place an order for LMR23630AFQDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630AFQDDARQ1 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 LMR23630AFQDDARQ1 reliable?
The price and inventory of LMR23630AFQDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630AFQDDARQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630AFQDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630AFQDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630AFQDDARQ1?
LMR23630AFQDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630AFQDDARQ1 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 LMR23630AFQDDARQ1?
For technical support, including LMR23630AFQDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630AFQDDARQ1 requirements.
6.How does Aetrix verify that LMR23630AFQDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630AFQDDARQ1 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 LMR23630AFQDDARQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630AFQDDARQ1?
All LMR23630AFQDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630AFQDDARQ1, 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 LMR23630AFQDDARQ1 part is unused and in its original packaging.
Return procedure for LMR23630AFQDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23630AFQDDARQ1 Tags
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