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Texas Instruments LMR23630APQDRRRQ1
- Part No.:
- LMR23630APQDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LMR23630APQDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,712
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Product details
Overview
LMR23630APQDRRRQ1 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, fixed 400-kHz switching frequency, and internal compensation. It delivers up to 3 A continuous output current with 4-V to 36-V input range, 75-μA quiescent current in PFM mode, and supports soft-start into prebiased loads for automotive infotainment power rails.
For engineers reviewing the LMR23630APQDRRRQ1 datasheet, LMR23630APQDRRRQ1 pinout, LMR23630APQDRRRQ1 application, or LMR23630APQDRRRQ1 equivalent, key selection considerations include its integrated PGOOD flag, fixed-frequency operation without external RT resistor, automotive-grade thermal and ESD robustness (HBM ±2500 V, CDM ±750 V), and compatibility with 5-V or 3.3-V output configurations in space-constrained PCB layouts.
Technical Context
The LMR23630APQDRRRQ1 uses peak-current-mode control with internal loop compensation, eliminating need for external compensation components. Its fixed 400-kHz switching frequency simplifies EMI filtering and enables predictable transient response across load steps from 0.1 A to 3 A.
It integrates high-side and low-side NMOS FETs with RDS(on) of 160 mΩ and 95 mΩ respectively, supports PFM for light-load efficiency and FPWM for constant-frequency operation, and features precision enable threshold (1.4–1.7 V), 1-V reference voltage (±2% over –40°C to +125°C), and hiccup-mode short-circuit protection.
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) conditions. |
| Output Current | 3 A continuous - sustains full rated load at +125°C ambient with proper PCB thermal design using thermal pad. |
| Switching Frequency | Fixed 400 kHz - eliminates need for RT resistor; enables consistent EMI profile and simplified filter design. |
| Quiescent Current | 75 μA in PFM mode - extends battery runtime in always-on automotive modules such as telematics or ADAS sensors. |
| Reference Voltage | 1.0 V ±2% - ensures output accuracy of ±1% for 5-V or 3.3-V outputs when using 1% feedback resistors. |
| Power-Good Flag | Open-drain PGOOD with 104–110% OV / 92–96.5% UV thresholds - provides reliable system-level power sequencing and fault detection. |
| Min. On-Time | 60 ns - enables high-duty-cycle operation down to VOUT/VIN = 0.14 at 36-V input, supporting 5-V output from 36-V supply. |
Pinout & Package
LMR23630APQDRRRQ1 is housed in a 12-pin WSON (DRR) package with wettable flank and exposed thermal pad (3.00 mm × 3.00 mm). The package supports automated optical inspection (AOI) and provides low thermal resistance (RθJA = 41.5°C/W, RθJC(bot) = 16.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | Connects to drain of internal high-side FET and source of low-side FET; requires low-inductance path to power inductor. |
| 3 BOOT | Bootstrap supply | Drives high-side gate via 100-nF ceramic capacitor to SW; critical for stable high-side FET turn-on. |
| 4 VCC | Bias supply output | Internal LDO output (4.1 V); must be bypassed with 2.2-μF capacitor to AGND-no external loading permitted. |
| 5 FB | Feedback input | Senses output voltage divider midpoint; 1-V reference enables precise VOUT setting (e.g., 5 V with RFBB = 10 kΩ, RFBT = 40 kΩ). |
| 6 PGOOD | Power-good flag | Open-drain output asserting high when VOUT is within ±4% of target; requires external 10–100-kΩ pullup to logic rail ≤12 V. |
| 8 EN/SYNC | Enable & sync input | Active-high enable (1.4–1.7 V threshold); also accepts external clock for synchronization (200–2200 kHz). |
| 7, 9, 10 AGND / VIN | Analog ground & input | VIN pins are paralleled for low-impedance input path; AGND is separate analog reference-must tie to PGND at single point. |
| 12 PGND | Power ground | Internal connection to low-side FET source; must connect directly to CIN, COUT, and thermal pad with minimal trace length. |
| 13 PAD | Thermal pad | Exposed die attach pad tied internally to AGND; mandatory solder connection to PCB ground plane for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient), HBM ±2500 V, CDM ±750 V-validated for under-hood and infotainment use. |
| Integrated PGOOD | Dedicated open-drain output with 1.5% hysteresis and deglitch timing (150 μs rise / 18 μs fall)-enables reliable system power sequencing. |
| Prebias soft-start | Allows safe startup into precharged output capacitors without reverse current-critical for hot-swap and multi-rail systems. |
| Short-circuit protection | Hiccup-mode current limiting with 64-cycle trip threshold and 10-ms retry delay-limits power dissipation during sustained faults. |
| Thermal management | Thermal shutdown at 162–178°C with 15°C hysteresis; low RθJC(bot) (16.3°C/W) enables >2.5 W dissipation on 2-layer PCB with 1-in² copper. |
Applications
| Automotive Cluster Power Supply | USB-C Charging Port Regulator |
|---|---|
|
Use Scenario: Powers TFT-LCD display, microcontroller, and CAN transceiver in digital instrument cluster with 12-V battery input. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering 2.5 A continuous; provides clean, sequenced power with PGOOD confirmation before MCU boot. Use Value: Fixed 400-kHz operation avoids audible noise; PGOOD enables fail-safe boot sequence; 75-μA quiescent current meets ISO 16750-2 sleep-mode requirements. |
Use Scenario: Generates stable 5-V bus for USB-C PD sink applications in vehicle center console. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12-V vehicle supply to regulated 5-V USB output with tight load regulation (<±1%). Use Value: Internal compensation reduces BOM count; hiccup-mode protection prevents thermal runaway during cable short events; wettable flank aids AOI in high-volume assembly. |
| ADAS Camera Module Bias Rail | Telematics Control Unit (TCU) Core Supply |
|
Use Scenario: Supplies 3.3-V core voltage to image sensor and ISP in rear-view camera module operating at –40°C to +105°C. IC Role / Device Role / Timing Role: High-efficiency synchronous buck delivering 1.2 A at 3.3 V with PFM mode active below 100 mA to minimize standby loss. Use Value: 4-V minimum input supports cold-crank; 1-V reference ensures <±30 mV output drift over temperature; AEC-Q100 qualification guarantees field reliability. |
Use Scenario: Provides 1.2-V core supply to LTE modem and GPS SoC in cellular-connected TCU with always-on wake-up capability. IC Role / Device Role / Timing Role: Low-IQ buck converter enabling <20-μA system sleep current; PGOOD signals valid rail to baseband processor before data transmission. Use Value: 75-μA no-load IQ extends battery backup time; soft-start into prebias prevents brownout during modem wake; thermal pad ensures stable operation in sealed enclosure. |
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 but includes FPWM mode (forced PWM at light load); no PGOOD output. | Lacks power-good signaling-unsuitable where system sequencing or fault monitoring is required. | Select only if low-output-ripple operation is prioritized over power sequencing capability. |
| LMR23630AQDDARQ1 | SOIC-8 package with same fixed 400-kHz frequency and no PGOOD; higher RDS(on) (185/105 mΩ) and lower thermal performance (RθJA = 42.0°C/W). | Less suitable for high-ambient or high-power-density designs; lacks wettable flank for AOI. | Choose only for legacy SOIC-based designs where board rework is prohibitive and thermal margin exists. |
Compared with LMR23630FQDRRRQ1 and LMR23630AQDDARQ1, the LMR23630APQDRRRQ1 uniquely combines PGOOD functionality, WSON-12 wettable flank packaging, and fixed-frequency operation-making it the optimal choice for new automotive designs requiring verified power sequencing and compact, inspectable layouts.
Availability
LMR23630APQDRRRQ1 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 LMR23630APQDRRRQ1 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 and embedded processing technologies, with decades of automotive-grade power management innovation.
The LMR23630-Q1 product line delivers SIMPLE SWITCHER® synchronous buck regulators optimized for automotive environments-designed to simplify power design while meeting stringent AEC-Q100, thermal, and EMI requirements in infotainment, body electronics, and ADAS systems.
FAQ
What is the function of the PGOOD pin on the LMR23630APQDRRRQ1?
The PGOOD pin on the LMR23630APQDRRRQ1 is an open-drain power-good flag that asserts high when the output voltage is within 92–110% of the target value. It features 150-μs rise-time deglitching and 18-μs fall-time deglitching to prevent false triggering during transients. This signal enables reliable system power sequencing and fault detection in automotive applications where the LMR23630APQDRRRQ1 supplies critical rails like MCU cores or display drivers.
Does the LMR23630APQDRRRQ1 require external compensation components?
No, the LMR23630APQDRRRQ1 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 PCB area. The internal compensation is optimized for stability with standard output capacitor types (e.g., 150-μF ceramic or polymer), enabling robust performance across temperature and load without tuning.
Can the LMR23630APQDRRRQ1 operate with a 3.3-V output?
Yes, the LMR23630APQDRRRQ1 supports adjustable output voltages from 1 V to 28 V using a resistor divider on the FB pin. For a 3.3-V output, TI recommends RFBB = 10 kΩ and RFBT = 23 kΩ (1% tolerance), yielding VOUT = 1 V × (1 + 23k/10k) = 3.3 V. The 1-V reference ensures ±2% accuracy over –40°C to +125°C, making it suitable for precision 3.3-V rails in ADAS camera modules.
What is the minimum input voltage required for the LMR23630APQDRRRQ1 to assert PGOOD?
The LMR23630APQDRRRQ1 requires a minimum input voltage of 1.5 V to generate a valid PGOOD output, as specified in the Electrical Characteristics table under VIN_PG_MIN. Below this threshold, the internal circuitry cannot reliably monitor output regulation. This ensures PGOOD remains inactive during undervoltage lockout (UVLO) recovery, preventing premature system enablement before stable operation is achieved.
How does the LMR23630APQDRRRQ1 handle short-circuit conditions?
The LMR23630APQDRRRQ1 employs hiccup-mode short-circuit protection: when valley current limit is tripped for 64 consecutive cycles, the device shuts down for 10 ms (WSON package), then retries. During hiccup, power dissipation is limited to ~0.5 W, preventing thermal damage. This behavior is confirmed in the datasheet's Timing Characteristics table and protects downstream components during sustained output shorts-common in automotive USB port or camera interface faults.
LMR23630APQDRRRQ1 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)
LMR23630APQDRRRQ1 FAQ
1.How can I place an order for LMR23630APQDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630APQDRRRQ1 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 LMR23630APQDRRRQ1 reliable?
The price and inventory of LMR23630APQDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630APQDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630APQDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630APQDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630APQDRRRQ1?
LMR23630APQDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630APQDRRRQ1 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 LMR23630APQDRRRQ1?
For technical support, including LMR23630APQDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630APQDRRRQ1 requirements.
6.How does Aetrix verify that LMR23630APQDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630APQDRRRQ1 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 LMR23630APQDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630APQDRRRQ1?
All LMR23630APQDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630APQDRRRQ1, 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 LMR23630APQDRRRQ1 part is unused and in its original packaging.
Return procedure for LMR23630APQDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR23630APQDRRRQ1 Tags
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