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Texas Instruments LMR23630APQDRRTQ1
- Part No.:
- LMR23630APQDRRTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630APQDRRTQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR23630APQDRRTQ1 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 power-good (PGOOD) output, 4-V to 36-V input range, fixed 400-kHz switching frequency, and 75-μA quiescent current in PFM mode-designed for automotive infotainment power rails.
For engineers reviewing the LMR23630APQDRRTQ1 datasheet, LMR23630APQDRRTQ1 pinout, LMR23630APQDRRTQ1 application, or LMR23630APQDRRTQ1 equivalent, key selection considerations include its integrated PGOOD flag, automotive-grade thermal performance (–40°C to +125°C ambient), fixed-frequency operation without external RT resistor, and compatibility with prebiased soft-start in clustered display systems.
Technical Context
The LMR23630APQDRRTQ1 uses peak-current-mode control with internal compensation, enabling stable regulation across wide input (4–36 V) and output (1–28 V) ranges without external loop components. Its fixed 400-kHz switching frequency eliminates RT pin configuration while supporting synchronization to external clocks up to 2.2 MHz via the EN/SYNC pin.
It integrates high-side and low-side NMOS FETs (RDS(on) = 160 mΩ / 95 mΩ), delivers 3-A continuous output, and features hiccup-mode short-circuit protection, thermal shutdown at 170°C, and precision enable with 1.55-V threshold and 0.4-V hysteresis-optimized for battery-powered automotive subsystems requiring low-noise, regulated 5-V or 3.3-V rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery (cold-crank down to 4 V, load-dump up to 36 V). |
| Output Current | 3 A continuous - sufficient for USB charging ports, display backlight drivers, or SoC core rails in head units. |
| Switching Frequency | Fixed 400 kHz - enables predictable EMI filtering and eliminates need for RT resistor layout or tuning. |
| Quiescent Current | 75 μA in PFM mode - extends battery runtime in always-on infotainment modules during sleep states. |
| Power-Good Output | Open-drain PGOOD with 94–96.5% UV and 104–110% OV thresholds - provides system-level fault detection before downstream logic powers up. |
| Thermal Performance | RθJA = 41.5°C/W (WSON) - allows 3-A operation at +125°C ambient with minimal heatsinking on 2-layer PCB. |
| Protection Features | Cycle-by-cycle current limit, hiccup-mode short-circuit recovery, thermal shutdown, VIN/VCC UVLO - ensures robustness in noisy automotive environments. |
Pinout & Package
LMR23630APQDRRTQ1 is housed in a 3.0 mm × 3.0 mm, 12-pin WSON package with wettable flanks and exposed thermal pad (PAD). The package supports automated optical inspection (AOI) and offers superior thermal dissipation versus SOIC.
| 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 to minimize EMI. |
| 3 BOOT | Bootstrap supply | Drives high-side gate; requires 100-nF ceramic capacitor between BOOT and SW for proper high-side FET turn-on. |
| 4 VCC | Bias LDO output | Internal 4.1-V regulator output; must be bypassed with 2.2-μF capacitor to AGND - no external loading permitted. |
| 5 FB | Feedback input | Senses output voltage divider midpoint; reference is 1.0 V ±2% - sets VOUT = 1.0 × (1 + RFBT/RFBB). |
| 6 PGOOD | Power-good flag | Open-drain output asserted when VOUT is within ±6% of target - requires external 10–100-kΩ pullup to logic rail ≤12 V. |
| 7 AGND | Analog ground | Reference for FB, PGOOD, and internal circuits - must connect directly to system ground plane, separate from PGND if noise-sensitive. |
| 8, 9 VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor placed near pins with shortest possible path to PGND. |
| 10 EN/SYNC | Enable & sync input | Active-high enable (1.55-V threshold); also accepts AC-coupled external clock (200–2200 kHz) for EMI reduction. |
| 12 PGND | Power ground | Low-side FET source return; connects internally to thermal pad - must tie to CIN/COUT ground and PCB ground plane. |
| 13 PAD | Thermal pad | Primary heat path to PCB; must be soldered to solid copper pour connected to PGND - critical for thermal reliability at 3 A. |
| 11 NC | No-connect | Not internally bonded - leave floating; do not route or connect to any net. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive infotainment thermal requirements without derating. |
| Integrated PGOOD with hysteresis | Enables safe power sequencing in multi-rail systems by confirming stable VOUT before releasing reset to microcontrollers or FPGAs. |
| Prebias soft-start | Allows controlled startup into already energized output capacitors - prevents reverse current and voltage overshoot in hot-swap or backup-power scenarios. |
| PFM/FPWM mode selection | PFM maximizes light-load efficiency; FPWM maintains constant frequency and low ripple - selectable via part number variant, not pin. |
| Internal compensation | Eliminates need for external Type-II/III compensation network - reduces BOM count and layout sensitivity for faster design cycles. |
Applications
| Automotive Cluster Display Power | USB-C Charging Module |
|---|---|
Use Scenario: Supplies regulated 5-V and 3.3-V rails to TFT LCD controller, touch IC, and CAN transceiver in digital instrument clusters. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3-A peak current with PGOOD confirmation before MCU boot sequence initiation. Use Value: Enables single-chip solution for dual-rail cluster power with automotive-grade reliability, eliminating discrete LDOs and external supervision ICs. | Use Scenario: Powers USB PD sink circuitry in vehicle-mounted charging ports, accepting variable input from 12-V battery or start-stop systems. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating in PFM mode during standby, switching to FPWM during data+power negotiation bursts. Use Value: Achieves >90% efficiency at 100-mA load (extending accessory battery life) and <1% output ripple at full 3-A charge current. |
| Heads-Up Display (HUD) Core Supply | ADAS Camera Sensor Bias Rail |
Use Scenario: Generates clean 3.3-V bias for HUD projection engine ASIC and laser driver, where EMI must avoid interfering with RF receivers. IC Role / Device Role / Timing Role: Synchronous buck with fixed 400-kHz frequency and optional external sync - allows alignment to system clock to shift switching harmonics away from sensitive bands. Use Value: Reduces conducted EMI by 15 dB through deterministic frequency placement, meeting CISPR-25 Class 5 limits without added shielding. | Use Scenario: Provides low-noise 2.5-V or 1.8-V rail for CMOS image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Regulator with soft-start into prebiased output and hiccup-mode protection - survives transient overloads from sensor frame-rate switching. Use Value: Prevents camera blackouts during rapid illumination changes by maintaining regulation during 200-ms load surges up to 2.5 A. |
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 package but FPWM-only mode (no PFM), no PGOOD, RT pin for adjustable frequency (200–2200 kHz). | Suitable for noise-sensitive applications requiring strict EMI control via frequency tuning, but lacks power sequencing capability. | Select when constant-frequency operation and EMI shaping outweigh need for ultra-low IQ or system-level fault reporting. |
| LMR23630AQDDARQ1 | SOIC-8 package, no PGOOD, fixed 400-kHz, PFM/FPWM selectable, higher RDS(on) (185/105 mΩ), RθJA = 42.0°C/W. | Better suited for industrial or non-automotive designs where board space is less constrained and AEC-Q100 is not required. | Choose for cost-sensitive, non-automotive applications needing same electrical specs but relaxed thermal and qualification requirements. |
Compared with LMR23630FQDRRRQ1 and LMR23630AQDDARQ1, the LMR23630APQDRRTQ1 uniquely combines automotive qualification, integrated PGOOD, and fixed-frequency simplicity - making it optimal for safety-aware infotainment power domains where fault visibility and startup predictability are mandatory.
Availability
LMR23630APQDRRTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and ADAS camera bias applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LMR23630APQDRRTQ1 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for automotive, industrial, and consumer markets.
The LMR23630-Q1 product line delivers SIMPLE SWITCHER® synchronous buck regulators engineered for automotive-grade reliability, ease of use, and minimal external component count - targeting infotainment, body electronics, and ADAS subsystems.
FAQ
What is the maximum input voltage rating for the LMR23630APQDRRTQ1?
The LMR23630APQDRRTQ1 has an absolute maximum input voltage rating of 42 V, with recommended operating input range from 4 V to 36 V. This allows direct connection to automotive batteries under cold-crank (down to 4 V) and load-dump (up to 36 V) conditions while maintaining functional operation per AEC-Q100 Grade 1 specifications.
Does the LMR23630APQDRRTQ1 require external compensation components?
No, the LMR23630APQDRRTQ1 uses internal compensation for its peak-current-mode control loop. This eliminates the need for external Type-II or Type-III compensation networks, reducing BOM count and layout complexity while ensuring stable operation across all supported output capacitor types and values.
How does the PGOOD pin on the LMR23630APQDRRTQ1 function?
The PGOOD pin on the LMR23630APQDRRTQ1 is an open-drain output that asserts low when the output voltage falls below 94–96.5% of the target or rises above 104–110%. It requires an external 10–100-kΩ pullup resistor to a logic rail ≤12 V and provides system-level power sequencing feedback before downstream devices are enabled.
Can the LMR23630APQDRRTQ1 synchronize to an external clock?
Yes, the LMR23630APQDRRTQ1 supports external clock synchronization via the EN/SYNC pin. An AC-coupled positive pulse (2.8–5.5 V amplitude, ≥100 ns width) can be injected into this pin to lock the internal oscillator to an external clock in the 200–2200 kHz range - enabling EMI reduction through frequency alignment.
What thermal performance can be expected from the LMR23630APQDRRTQ1 in its WSON package?
The LMR23630APQDRRTQ1 in the 12-pin WSON package has a junction-to-ambient thermal resistance (RθJA) of 41.5°C/W. With proper PCB layout-including full thermal-pad soldering to a 4-layer board with 1-in² copper pour-it sustains 3-A continuous output at +125°C ambient temperature without derating.
LMR23630APQDRRTQ1 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:
- 400kHz
- 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)
LMR23630APQDRRTQ1 FAQ
1.How can I place an order for LMR23630APQDRRTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630APQDRRTQ1 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 LMR23630APQDRRTQ1 reliable?
The price and inventory of LMR23630APQDRRTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630APQDRRTQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630APQDRRTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630APQDRRTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630APQDRRTQ1?
LMR23630APQDRRTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630APQDRRTQ1 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 LMR23630APQDRRTQ1?
For technical support, including LMR23630APQDRRTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630APQDRRTQ1 requirements.
6.How does Aetrix verify that LMR23630APQDRRTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630APQDRRTQ1 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 LMR23630APQDRRTQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630APQDRRTQ1?
All LMR23630APQDRRTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630APQDRRTQ1, 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 LMR23630APQDRRTQ1 part is unused and in its original packaging.
Return procedure for LMR23630APQDRRTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23630APQDRRTQ1 Tags
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