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Texas Instruments LMR23630QDRRTQ1
- Part No.:
- LMR23630QDRRTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630QDRRTQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:183
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Product details
Overview
LMR23630QDRRTQ1 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, features 60-ns minimum on-time, and operates in PFM or FPWM mode with 75-μA no-load quiescent current - ideal for automotive infotainment power rails.
For engineers reviewing the LMR23630QDRRTQ1 datasheet, LMR23630QDRRTQ1 pinout, LMR23630QDRRTQ1 application, or LMR23630QDRRTQ1 equivalent, key selection considerations include its adjustable switching frequency (150–2425 kHz), internal compensation, soft-start into prebiased loads, hiccup-mode short-circuit protection, and thermal shutdown at 170°C.
Technical Context
The LMR23630QDRRTQ1 employs peak-current-mode control with fixed-frequency operation and user-selectable PFM/FPWM modes. Its internal compensation eliminates external loop components, while the RT pin enables precise frequency programming from 150 kHz to 2425 kHz via a single resistor to AGND.
It integrates high-side and low-side NMOS FETs (RDS(on) = 160 mΩ / 95 mΩ), supports synchronization to external clocks (200–2200 kHz), and provides precision enable with undervoltage lockout (3.3–3.9 V rising threshold) and power-good flag with 94–96.5% UV and 104–110% OV thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports wide automotive battery transients and unregulated 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. |
| Thermal Shutdown | 170°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Package | 12-pin WSON (3.0 mm × 3.0 mm) with wettable flanks - supports automated optical inspection and robust thermal performance (RθJA = 41.5°C/W). |
Pinout & Package
LMR23630QDRRTQ1 uses a 12-pin WSON package with exposed thermal pad (3.0 mm × 3.0 mm). Pin 6 is the RT terminal for frequency programming; no PGOOD pin is present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | Connects to inductor; carries high di/dt switching current - requires short, low-inductance trace. |
| 3 BOOT | Bootstrap supply | Drives high-side gate; requires 100-nF ceramic capacitor between BOOT and SW. |
| 4 VCC | Internal bias LDO output | Supplies internal circuitry; bypass with 2.2-μF capacitor to AGND - no external load allowed. |
| 5 FB | Feedback input | Monitors output voltage via resistor divider; reference is 1.0 V ±2% over temperature. |
| 6 RT | Frequency programming | Resistor to AGND sets fSW; floating = 400 kHz default - never short to ground. |
| 7 AGND | Analog ground | Reference for FB, EN/SYNC, RT; separate from PGND but connected on PCB near device. |
| 8, 9, 10 VIN | Power input | Accepts 4–36 V; requires local 10-μF ceramic input capacitor close to pins 8/9/10. |
| 12 PGND | Power ground | Low-side FET source connection; must tie to CIN, COUT, and thermal pad with minimal impedance. |
| 13 PAD | Thermal pad | Primary heat path to PCB ground plane; must be soldered to ≥4 thermal vias under pad. |
| 11 NC | No connect | Not internally bonded - leave floating per datasheet; do not route or connect. |
Key Features
| Feature | Design Value |
|---|---|
| Internal compensation | Eliminates need for external 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 sequencing. |
| Hiccup-mode short-circuit protection | Disables switching after 64 current-limit cycles, then retries after 10 ms - prevents thermal runaway. |
| PFM/FPWM mode selection | Enables efficiency optimization (PFM) or low-noise constant-frequency operation (FPWM) - selectable via EN/SYNC logic level. |
| High-duty-cycle support | 60-ns min on-time allows >80% duty cycle at 400 kHz - supports 5 V out from 6 V input without dropout. |
Applications
| Automotive Infotainment Cluster | USB-C Charging Module |
|---|---|
Use Scenario: Powering LCD controller, GPU, and audio DSP in digital instrument clusters with 12 V battery input. IC Role / Device Role / Timing Role: Primary 5-V or 3.3-V buck regulator delivering stable 3-A rail with low EMI and thermal resilience. Use Value: AEC-Q100 Grade 1 qualification ensures operation from –40°C to +125°C ambient; PFM mode extends standby time during vehicle sleep. |
Use Scenario: Generating 5-V/3-A bus for USB-C PD sink applications in automotive telematics units. IC Role / Device Role / Timing Role: High-efficiency step-down converter with fast transient response to handle dynamic load steps during negotiation. Use Value: 60-ns min on-time maintains regulation during 12 V → 5 V conversion at high duty cycle; FPWM mode minimizes ripple on sensitive USB data lines. |
| Off-Battery Industrial Sensor Hub | ADAS Camera Power Supply |
Use Scenario: Providing regulated 3.3-V supply to microcontroller, CAN transceiver, and analog sensors in battery-backed IoT edge nodes. IC Role / Device Role / Timing Role: Low-quiescent-current buck regulator enabling multi-year battery life in maintenance-free deployments. Use Value: 75-μA no-load IQ in PFM mode reduces standby power; wide 4–36 V input accommodates degraded battery or solar-charged systems. |
Use Scenario: Powering image sensor and ISP in rear-view or surround-view cameras requiring clean, low-noise 1.8-V or 2.8-V rails. IC Role / Device Role / Timing Role: Pre-regulator stepping 12 V down to intermediate voltage (e.g., 5 V), feeding downstream LDOs or point-of-load converters. Use Value: Adjustable frequency avoids AM band interference; internal compensation simplifies filtering for noise-sensitive imaging circuits. |
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 | Same WSON-12 package and RT pin, but adds FPWM mode capability (LMR23630QDRRTQ1 is PFM-only by default). | Required where strict output voltage ripple control is needed - e.g., RF or high-speed ADC power domains. | Select LMR23630FQDRRRQ1 if constant-frequency operation is mandatory; otherwise LMR23630QDRRTQ1 offers lower light-load IQ. |
| LMR23625QDRRRQ1 | 2.5-A rated version in identical WSON-12 package with RT pin; shares same pinout, compensation, and feature set. | Suitable for cost-optimized designs where 3-A headroom is unnecessary - reduces thermal margin and BOM cost. | Choose LMR23625QDRRRQ1 for ≤2.5-A loads to simplify thermal design; LMR23630QDRRTQ1 is preferred for full 3-A capability. |
Compared with LMR23630FQDRRRQ1, LMR23630QDRRTQ1 trades FPWM capability for lower 75-μA PFM quiescent current; versus LMR23625QDRRRQ1, it provides 0.5-A higher output current in the same footprint - enabling direct upgrade paths without PCB rework.
Availability
LMR23630QDRRTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and off-battery industrial sensor applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMR23630QDRRTQ1 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 and embedded processing solutions for automotive, industrial, and personal electronics markets.
The LMR23630QDRRTQ1 belongs to TI's SIMPLE SWITCHER® automotive-grade DC/DC converter family, engineered specifically for reliability in harsh environments - including engine bay, dashboard, and ADAS subsystems - with integrated protection and AEC-Q100 certification.
FAQ
What is the switching frequency range of the LMR23630QDRRTQ1?
The LMR23630QDRRTQ1 supports an adjustable switching frequency from 150 kHz to 2425 kHz, set by a resistor from the RT pin to AGND. With RT floating, it defaults to 400 kHz. This range enables EMI compliance tuning and optimization of inductor size and efficiency trade-offs. The LMR23630QDRRTQ1 does not support external clock synchronization in this variant - that function requires the EN/SYNC pin configuration found in other members of the family.
Does the LMR23630QDRRTQ1 include power-good signaling?
No, the LMR23630QDRRTQ1 does not include a PGOOD pin. It is the RT-pin variant (WSON-12 with pin 6 = RT), whereas the PGOOD functionality is implemented in the alternate WSON-12 variant LMR23630APQDRRRQ1 (pin 6 = PGOOD). The LMR23630QDRRTQ1 relies on monitoring the FB pin or using external supervision circuits for output validation.
What is the maximum output current capability of the LMR23630QDRRTQ1?
The LMR23630QDRRTQ1 delivers up to 3 A of continuous DC output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Peak inductor current limit is 5.5 A (typical) for the WSON package. Sustained 3-A operation requires adequate copper area, thermal vias under the PAD, and airflow - derating applies above 85°C ambient.
How does the LMR23630QDRRTQ1 handle light-load efficiency?
The LMR23630QDRRTQ1 automatically enters PFM mode at light loads to maintain high efficiency, achieving 75 μA quiescent current at no load. This behavior reduces switching losses and extends battery runtime in always-on automotive modules. Unlike FPWM variants, the LMR23630QDRRTQ1 does not force constant-frequency operation below ~100 mA - making it optimal for intermittent-load applications.
Is the LMR23630QDRRTQ1 pin-compatible with other devices in the LMR236xx-Q1 family?
Yes, the LMR23630QDRRTQ1 shares identical 12-pin WSON packaging and pinout with other LMR236xx-Q1 variants (e.g., LMR23625QDRRRQ1, LMR23630FQDRRRQ1), enabling drop-in replacement within the same current and feature tier. This allows scalable design reuse - for example, upgrading from 2.5 A to 3 A without layout changes - provided the RT pin usage and mode selection align with system requirements.
LMR23630QDRRTQ1 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)
LMR23630QDRRTQ1 FAQ
1.How can I place an order for LMR23630QDRRTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630QDRRTQ1 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 LMR23630QDRRTQ1 reliable?
The price and inventory of LMR23630QDRRTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630QDRRTQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630QDRRTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630QDRRTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630QDRRTQ1?
LMR23630QDRRTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630QDRRTQ1 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 LMR23630QDRRTQ1?
For technical support, including LMR23630QDRRTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630QDRRTQ1 requirements.
6.How does Aetrix verify that LMR23630QDRRTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630QDRRTQ1 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 LMR23630QDRRTQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630QDRRTQ1?
All LMR23630QDRRTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630QDRRTQ1, 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 LMR23630QDRRTQ1 part is unused and in its original packaging.
Return procedure for LMR23630QDRRTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23630QDRRTQ1 Tags
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TPS562201DDCR
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AZ34063UMTR-G1
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MC34063EBD-TR
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