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Texas Instruments LMR23630AQDDAQ1
- Part No.:
- LMR23630AQDDAQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23630AQDDAQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,249
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Product details
Overview
LMR23630AQDDAQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 3-A synchronous step-down DC/DC converter in an 8-pin HSOIC package with PowerPAD™. It delivers continuous 3-A output current, supports 4-V to 36-V input range, features 400-kHz fixed switching frequency, and operates down to –40°C ambient for automotive infotainment power rails.
For engineers reviewing the LMR23630AQDDAQ1 datasheet, LMR23630AQDDAQ1 pinout, LMR23630AQDDAQ1 application, or LMR23630AQDDAQ1 equivalent, key selection considerations include its PFM/FPWM mode flexibility, internal compensation, 75-μA no-load quiescent current, precision enable input, and integrated overcurrent/thermal protection - all validated for automotive-grade reliability.
Technical Context
The LMR23630AQDDAQ1 employs peak-current-mode control with internal loop compensation, eliminating external compensation components. Its fixed 400-kHz switching frequency enables predictable EMI filtering and stable operation across 4–36 V input while maintaining 3-A continuous output capability.
It integrates high-side (185 mΩ) and low-side (105 mΩ) MOSFETs, supports soft-start into prebiased loads, and includes hiccup-mode short-circuit protection. The EN/SYNC pin provides both precision enable control and external clock synchronization capability up to 2.2 MHz - though the DDA variant uses fixed-frequency operation without RT pin.
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 - sufficient for powering USB-C PD controllers, display timing controllers, or multi-rail SoC subsystems. |
| Switching Frequency | 400 kHz fixed - enables compact magnetics design and predictable EMI profile without requiring external RT resistor. |
| Quiescent Current | 75 μA in PFM mode - extends battery runtime in always-on automotive modules such as telematics or ADAS sensors. |
| Operating Junction Temp | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard-mounted applications. |
| Protection Features | Cycle-by-cycle current limit, hiccup-mode short-circuit, thermal shutdown, VIN/VCC UVLO - ensures robust field operation without external supervision. |
| Package | 8-pin HSOIC with PowerPAD™ - thermally enhanced SOIC footprint enabling >3 A operation with standard PCB copper area. |
Pinout & Package
LMR23630AQDDAQ1 is housed in an 8-pin HSOIC (DDA) package with exposed thermal pad (PowerPAD™), measuring 4.90 mm × 3.90 mm. The package provides low thermal resistance (RθJA = 42.0°C/W) and supports high-power density layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects to power inductor; carries high di/dt switching current - requires short, low-inductance trace to minimize EMI and voltage spikes. |
| 2 BOOT | Bootstrap supply | Drives high-side MOSFET gate; requires 100-nF ceramic capacitor between BOOT and SW for proper gate drive voltage generation. |
| 3 VCC | Internal bias LDO output | Supplies internal circuitry; must be bypassed with 2.2-μF/16-V capacitor to AGND - no external loading permitted. |
| 4 FB | Feedback input | Monitors output via resistor divider; precision 1-V reference enables accurate VOUT regulation (±1% over temp). |
| 5 EN/SYNC | Enable & sync input | Logic-level enable (1.55 V threshold); also accepts AC-coupled external clock for synchronization - not used for frequency adjustment in this fixed-F version. |
| 6 AGND | Analog ground | Reference for feedback, reference, and control circuits; must be connected to system ground with low-impedance path. |
| 7 VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor placed near pin to suppress high-frequency noise. |
| 8 PGND | Power ground | Internally tied to low-side FET source; connects to CIN/COUT grounds and thermal pad - forms primary return path for high-current switching loop. |
| Pad | Thermal pad | Exposed die attach pad; must be soldered to large PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2000 V and CDM ±1000 V - suitable for front-end automotive electronics. |
| Internal compensation | Eliminates need for external Type-II/III compensation network - reduces BOM count and layout sensitivity while ensuring stability with wide capacitor ESR ranges. |
| PFM and FPWM light-load modes | PFM achieves 75-μA IQ for battery longevity; FPWM option (on alternate variants) maintains constant frequency and low ripple - selectable per design requirement. |
| Soft-start into prebiased output | Prevents reverse current flow when enabling into a powered rail - critical for hot-swap and power-sequencing applications in multi-rail systems. |
| High-duty-cycle operation | Supports VOUT close to VIN (e.g., 5 V out from 5.5 V input) without dropout - enables efficient post-regulation in low-headroom scenarios. |
Applications
| Automotive Infotainment Cluster | USB Charging Port |
|---|---|
Use Scenario: Powering TFT-LCD display, touch controller, and audio codec in digital instrument cluster with 12-V battery input. IC Role / Device Role / Timing Role: Primary 5-V or 3.3-V point-of-load regulator delivering regulated power with tight transient response and low noise. Use Value: Meets AEC-Q100 requirements, sustains operation during cold-crank (4.5 V), and maintains <1% output regulation across temperature and load. |
Use Scenario: Supplying 5-V/3-A power to USB Type-A or Type-C ports in vehicle center console or rear-seat entertainment. IC Role / Device Role / Timing Role: High-efficiency buck converter stepping down 12-V battery to stable 5-V USB output with fast load-step response. Use Value: Delivers full 3-A continuously at >90% efficiency (12 V → 5 V), supports PFM for standby power savings, and includes hiccup protection against cable shorts. |
| Off-Battery Industrial Sensor Node | ADAS Camera Module Power |
Use Scenario: Regulating 24-V industrial bus to 3.3-V for microcontroller, CAN transceiver, and analog sensor interface. IC Role / Device Role / Timing Role: Robust, low-quiescent-current DC/DC converter enabling long-life battery or energy-harvesting operation. Use Value: 75-μA no-load IQ extends battery life; 36-V max input accommodates 24-V surge transients; thermal shutdown prevents field failures. |
Use Scenario: Providing clean, stable 1.8-V or 2.8-V core voltage to image signal processor (ISP) and MIPI interface in automotive camera ECU. IC Role / Device Role / Timing Role: Secondary buck regulator fed from main 5-V rail, delivering low-noise, tightly regulated core voltage. Use Value: Internal compensation ensures stability with small ceramic output caps; soft-start prevents ISP reset on power-up; -40°C to +125°C operation matches camera thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23630FQDDARQ1 | Same DDA package and 400-kHz fixed frequency, but adds FPWM mode for constant-frequency operation at light load. | Preferred where low output voltage ripple and tight regulation under dynamic load are required (e.g., RF or ADC power rails). | Select LMR23630FQDDARQ1 if FPWM mode is needed; otherwise LMR23630AQDDAQ1 offers lower IQ in PFM for battery-sensitive use cases. |
| LMR23625AQDDAQ1 | Pin-compatible 2.5-A variant with identical 400-kHz frequency, same package, and matching pinout - differs only in current rating and internal current limit. | Suitable when 3-A headroom is unnecessary and thermal margin or cost optimization is prioritized. | Choose LMR23625AQDDAQ1 for designs with ≤2.5-A sustained load; retains identical layout, BOM, and qualification status. |
Compared with LMR23630FQDDARQ1, the LMR23630AQDDAQ1 trades FPWM capability for lower 75-μA quiescent current in PFM mode - optimizing for battery runtime over ripple performance. Against LMR23625AQDDAQ1, it provides 0.5-A higher current headroom without changing PCB layout or qualification effort.
Availability
LMR23630AQDDAQ1 is available at Aetrix Electronics and suitable for automotive infotainment clusters, USB charging ports, and off-battery industrial sensor nodes requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for LMR23630AQDDAQ1 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 qualification expertise and broad manufacturing scale.
The LMR23630AQDDAQ1 belongs to TI's SIMPLE SWITCHER® automotive-grade DC/DC converter family, designed specifically for reliable, easy-to-deploy power conversion in harsh automotive environments - emphasizing qualification integrity, thermal robustness, and minimal external component count.
FAQ
What is the maximum input voltage rating for the LMR23630AQDDAQ1?
The LMR23630AQDDAQ1 has an absolute maximum input voltage rating of 42 V, with recommended operating input range from 4 V to 36 V. This allows safe operation during automotive load-dump events (up to 36 V) and cold-crank conditions (down to 4.5 V), making it suitable for direct battery connection in Grade 1 automotive applications.
Does the LMR23630AQDDAQ1 require external compensation components?
No, the LMR23630AQDDAQ1 features fully internal compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, reduces BOM count, improves layout robustness, and ensures stable operation across a wide range of output capacitor types and values - a key advantage of the SIMPLE SWITCHER® architecture.
What protection features are integrated into the LMR23630AQDDAQ1?
The LMR23630AQDDAQ1 integrates cycle-by-cycle current limiting, hiccup-mode short-circuit protection, thermal shutdown (162–178°C trip), VIN undervoltage lockout (3.3–3.9 V rising threshold), and VCC undervoltage lockout. These protections operate autonomously without external circuitry, ensuring field reliability in automotive and industrial deployments.
Can the LMR23630AQDDAQ1 synchronize to an external clock?
Yes, the EN/SYNC pin of the LMR23630AQDDAQ1 supports external clock synchronization within 200 kHz to 2.2 MHz, using AC coupling via a small capacitor. However, because this variant uses the fixed 400-kHz oscillator (no RT pin), synchronization is used only to align switching edges - not to adjust nominal frequency.
Is the LMR23630AQDDAQ1 pin-compatible with other members of the LMR236xx-Q1 family?
Yes, the LMR23630AQDDAQ1 in the 8-pin HSOIC (DDA) package shares identical pinout and footprint with LMR23610AQDDAQ1 (1-A), LMR23615AQDDAQ1 (1.5-A), and LMR23625AQDDAQ1 (2.5-A). This enables scalable power design and last-minute current-rating changes without PCB revision.
LMR23630AQDDAQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LMR23630AQDDAQ1 FAQ
1.How can I place an order for LMR23630AQDDAQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630AQDDAQ1 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 LMR23630AQDDAQ1 reliable?
The price and inventory of LMR23630AQDDAQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630AQDDAQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630AQDDAQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630AQDDAQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630AQDDAQ1?
LMR23630AQDDAQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630AQDDAQ1 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 LMR23630AQDDAQ1?
For technical support, including LMR23630AQDDAQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630AQDDAQ1 requirements.
6.How does Aetrix verify that LMR23630AQDDAQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630AQDDAQ1 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 LMR23630AQDDAQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630AQDDAQ1?
All LMR23630AQDDAQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630AQDDAQ1, 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 LMR23630AQDDAQ1 part is unused and in its original packaging.
Return procedure for LMR23630AQDDAQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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