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Texas Instruments LMR23630QDRRRQ1
- Part No.:
- LMR23630QDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630QDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LMR23630QDRRRQ1 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 RT pin for frequency adjustment. It delivers continuous 3-A output current, supports 4-V to 36-V input range, operates at adjustable switching frequency (150–2425 kHz), and features PFM/FPWM mode selection for optimized light-load efficiency or low-ripple regulation - used in automotive infotainment power rails.
For engineers reviewing the LMR23630QDRRRQ1 datasheet, LMR23630QDRRRQ1 pinout, LMR23630QDRRRQ1 application, or LMR23630QDRRRQ1 equivalent, key selection considerations include its RT-programmable frequency, absence of power-good output, internal compensation, 60-ns minimum on-time, and thermal performance in wettable-flank WSON packaging for automotive PCB reliability.
Technical Context
The LMR23630QDRRRQ1 employs peak-current-mode control with fixed-frequency operation and user-adjustable switching frequency via external RT resistor (150–2425 kHz). It integrates high-side and low-side MOSFETs with RDS(on) of 160 mΩ / 95 mΩ and supports soft-start into prebiased loads.
It features internal loop compensation, precision enable with 1.4–1.7 V threshold and 0.4 V hysteresis, 75 µA quiescent current in PFM mode, and hiccup-mode short-circuit protection. The device lacks PGOOD output and uses EN/SYNC as dual-function pin for enable control or external clock synchronization.
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 USB charging, display backlight drivers, and MCU core rails. |
| Switching Frequency | Adjustable 150–2425 kHz via RT pin - enables EMI optimization and inductor size reduction. |
| Quiescent Current | 75 µA in PFM mode - extends battery life in always-on automotive modules. |
| Min On-Time | 60 ns - enables high-duty-cycle operation (e.g., 5 V out from 12 V in) without pulse-skipping. |
| Package | 12-pin WSON (3.0 mm × 3.0 mm) with wettable flanks - supports automated optical inspection and robust solder joint reliability. |
| Thermal Resistance | RθJA = 41.5°C/W - enables 3-A operation at +125°C ambient with minimal heatsinking. |
Pinout & Package
LMR23630QDRRRQ1 is housed in a 12-pin WSON package (3.0 mm × 3.0 mm) with exposed thermal pad (Pin 13) and wettable flank leads for solder inspection. Pin 6 is dedicated to RT (frequency programming); no PGOOD pin is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | Connects to inductor; carries high di/dt switching current - requires tight layout and Kelvin connection. |
| 3 BOOT | Bootstrap supply | Drives high-side gate; requires 100-nF ceramic capacitor between BOOT and SW for proper gate drive. |
| 4 VCC | Bias LDO output | Internal 4.1-V supply; bypass with 2.2-µF capacitor to AGND - no external load permitted. |
| 5 FB | Voltage feedback input | Senses output via resistor divider; 1-V internal reference enables precise VOUT setting (e.g., 3.3 V, 5 V). |
| 6 RT | Frequency programming | Resistor to AGND sets fSW; floating defaults to 400 kHz - not shorted to ground. |
| 7 AGND | Analog ground reference | Reference for FB, EN/SYNC, RT; must be connected to system ground with low-impedance path. |
| 8, 9 VIN | Main input supply | Accepts 4–36 V; decoupled with low-ESR CIN close to pins - critical for EMI and stability. |
| 11 NC | No-connect | Not internally bonded - must remain unconnected and unstubbed on PCB. |
| 12 PGND | Power ground return | Low-side FET source return; ties to CIN, COUT, and thermal pad - separate from AGND at single point. |
| 13 PAD | Thermal pad | Primary heat dissipation path; must be soldered to large copper pour tied to PGND for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| RT-programmable frequency | Enables EMI compliance tuning and optimal inductor selection across 150–2425 kHz without changing layout. |
| Internal compensation | Eliminates need for external compensation network - reduces BOM count and design iteration time. |
| PFM/FPWM mode selection | PFM maximizes light-load efficiency; FPWM maintains constant fSW and low ripple for noise-sensitive analog circuits. |
| Soft-start into prebiased output | Prevents reverse current flow when powering up into existing rail voltage - essential for hot-swap and sequencing. |
| Hiccup-mode short-circuit protection | Shuts down during overload, retries after delay - protects MOSFETs and prevents thermal runaway in fault conditions. |
Applications
| Automotive Cluster Power Supply | USB-C Charging Module |
|---|---|
Use Scenario: Powers instrument cluster MCU, display driver, and CAN transceiver from 12-V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 5-V/3.3-V rails with <1.5% load regulation over 0–3 A. Use Value: 60-ns min on-time supports >40% duty cycle at 5 V out from 12 V, enabling compact solution size without pulse skipping. |
Use Scenario: Generates 5-V/9-V/15-V PD sink rails in vehicle-mounted USB-C chargers with dynamic load steps. IC Role / Device Role / Timing Role: Adjustable-frequency synchronous buck providing fast transient response and low output ripple in FPWM mode. Use Value: 75 µA quiescent current in PFM mode minimizes standby loss; RT pin allows frequency shift to avoid AM band interference. |
| ADAS Camera Power Rail | Industrial Telematics Gateway |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 regulator delivering 1.8-V/2.8-V rails with thermal shutdown at 162–178°C junction. Use Value: Wettable-flank WSON package ensures solder joint reliability during thermal cycling; RDS(on) of 160/95 mΩ limits conduction loss at full load. |
Use Scenario: Powers LTE modem, GPS receiver, and microcontroller in fleet management gateways operating from 24-V truck battery. IC Role / Device Role / Timing Role: Wide-input buck converter supporting 4–36 V with hiccup-mode protection against load dump-induced shorts. Use Value: 4-V UVLO start-up enables operation during deep battery discharge; internal soft-start prevents inrush into large capacitive loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23630FQDRRRQ1 | Includes FPWM mode option; identical pinout, package, and RT functionality. | Required where constant switching frequency and low output ripple are mandatory (e.g., RF-sensitive systems). | Select LMR23630FQDRRRQ1 if FPWM is needed; otherwise LMR23630QDRRRQ1 offers lower cost and same core functionality. |
| LMR23625QDRRRQ1 | 2.5-A rated version; shares same 12-pin WSON package and RT pin, but lower current limit and RDS(on). | Suitable for lower-power infotainment subsystems where 3-A headroom is unnecessary. | Choose LMR23625QDRRRQ1 only if 2.5 A suffices - avoids overdesign and reduces thermal margin requirements. |
Compared with LMR23630FQDRRRQ1, the LMR23630QDRRRQ1 omits FPWM capability but retains identical frequency adjustability and thermal performance; versus LMR23625QDRRRQ1, it provides higher current headroom and lower conduction losses at full load, making it optimal for 3-A automotive power rails.
Availability
LMR23630QDRRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and industrial telematics requiring stable component supply with AEC-Q100 qualification and long-term production support.
Supply support for LMR23630QDRRRQ1 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 decades of automotive-grade product development and manufacturing excellence.
The LMR23630QDRRRQ1 belongs to TI's SIMPLE SWITCHER® automotive DC/DC converter family, designed specifically for reliable, low-EMI, high-efficiency power conversion in harsh-temperature automotive environments.
FAQ
What is the function of the RT pin on the LMR23630QDRRRQ1?
The RT pin on the LMR23630QDRRRQ1 programs the switching frequency by connecting an external resistor to AGND. Its value determines fSW across 150–2425 kHz per TI's equation RT(kΩ) = 40200 / fSW(kHz) – 0.6. Floating the RT pin sets default 400-kHz operation. The LMR23630QDRRRQ1 does not support shorting RT to ground.
Does the LMR23630QDRRRQ1 include a power-good (PGOOD) output?
No, the LMR23630QDRRRQ1 does not include a PGOOD output. This variant uses Pin 6 for RT functionality. For power-good signaling, select the PGOOD-equipped variant LMR23630APQDRRRQ1 (WSON with Pin 6 = PGOOD) or LMR23630AQDDARQ1 (SOIC with PGOOD).
What is the maximum output current capability of the LMR23630QDRRRQ1?
The LMR23630QDRRRQ1 delivers up to 3 A of continuous DC output current under recommended operating conditions (TJ ≤ 125°C, proper PCB layout with thermal pad soldered). Peak inductor current limit is 4–5.5 A depending on temperature and package, ensuring robust overload handling.
How does the LMR23630QDRRRQ1 manage light-load efficiency?
The LMR23630QDRRRQ1 automatically enters PFM mode at light loads to reduce switching losses, achieving 75 µA quiescent current. It can be configured for forced PWM (FPWM) using the LMR23630FQDRRRQ1 variant - but the LMR23630QDRRRQ1 itself operates in PFM-only mode unless externally forced via SYNC signal.
What package type and thermal characteristics apply to the LMR23630QDRRRQ1?
The LMR23630QDRRRQ1 uses a 12-pin WSON package (3.0 mm × 3.0 mm) with wettable flanks and exposed thermal pad (Pin 13). Its RθJA is 41.5°C/W, and RθJC(bot) is 16.3°C/W - requiring direct thermal pad connection to PCB ground plane for full 3-A performance at +125°C ambient.
LMR23630QDRRRQ1 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)
LMR23630QDRRRQ1 FAQ
1.How can I place an order for LMR23630QDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630QDRRRQ1 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 LMR23630QDRRRQ1 reliable?
The price and inventory of LMR23630QDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630QDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630QDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630QDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630QDRRRQ1?
LMR23630QDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630QDRRRQ1 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 LMR23630QDRRRQ1?
For technical support, including LMR23630QDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630QDRRRQ1 requirements.
6.How does Aetrix verify that LMR23630QDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630QDRRRQ1 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 LMR23630QDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630QDRRRQ1?
All LMR23630QDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630QDRRRQ1, 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 LMR23630QDRRRQ1 part is unused and in its original packaging.
Return procedure for LMR23630QDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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