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Texas Instruments LMR23630AFQDDAQ1
- Part No.:
- LMR23630AFQDDAQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR23630AFQDDAQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:765
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Product details
Overview
LMR23630AFQDDAQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 36-V, 3-A synchronous step-down DC/DC converter in SOIC-8 package, delivering up to 3 A continuous output current with 4–36 V input range, 400 kHz fixed switching frequency, and 75 µA quiescent current in PFM mode - used in automotive infotainment power rails and USB charging modules.
For engineers reviewing the LMR23630AFQDDAQ1 datasheet, LMR23630AFQDDAQ1 pinout, LMR23630AFQDDAQ1 application, or LMR23630AFQDDAQ1 equivalent, key selection considerations include its automotive qualification (–40°C to +125°C), FPWM light-load mode for low ripple, internal compensation, and SOIC-8 thermal performance with 42.0°C/W RθJA.
Technical Context
The LMR23630AFQDDAQ1 employs peak-current-mode control with fixed 400 kHz switching frequency and supports forced PWM (FPWM) operation to maintain constant frequency and minimize output voltage ripple under light loads. Its internal compensation eliminates external loop components, and the precision enable input allows accurate system power sequencing.
It integrates high-side and low-side NMOS power switches with RDS(on) of 185 mΩ / 105 mΩ, features hiccup-mode short-circuit protection, thermal shutdown at 162–178°C, and VIN undervoltage lockout with 3.3–3.9 V rising threshold and 0.4 V hysteresis - all validated for automotive Grade 1 ambient operation.
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) transients. |
| Output Current | 3 A continuous - sustains full rated load without derating at +85°C ambient with standard PCB layout and 2 oz copper. |
| Switching Frequency | Fixed 400 kHz - enables compact magnetics design while maintaining EMI compliance in automotive CISPR 25 Class 5 bands. |
| Quiescent Current | 75 µA in PFM mode - extends battery runtime in always-on automotive modules such as telematics and ADAS sensors. |
| Enable Threshold | 1.4–1.7 V rising, 0.4 V hysteresis - ensures clean startup/shutdown sequencing with minimal external resistor divider overhead. |
| Reference Voltage | 0.98–1.02 V over –40°C to +125°C - enables ±1% output regulation accuracy across automotive temperature range using 1% FB resistors. |
| Thermal Resistance | RθJA = 42.0°C/W (SOIC-8) - limits junction rise to ≤84°C at 3 A, 25°C ambient, enabling convection-only cooling in most automotive enclosures. |
Pinout & Package
LMR23630AFQDDAQ1 is packaged in an 8-pin HSOIC (DDA) with PowerPAD™, measuring 4.90 mm × 3.90 mm, optimized for thermal dissipation via exposed thermal pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to power inductor; carries high di/dt switching current - requires tight layout with minimal loop area to reduce EMI. |
| BOOT | Bootstrap supply | Drives high-side MOSFET gate; requires 100-nF ceramic capacitor between BOOT and SW for reliable gate drive. |
| VCC | Internal bias LDO output | Supplies internal circuitry; bypass with 2.2-μF/16-V capacitor to AGND - no external loading permitted. |
| FB | Feedback input | Senses output voltage via resistor divider; high-impedance (10 nA leakage) node requiring noise-free routing away from SW. |
| EN/SYNC | Enable & sync input | Active-high enable with UVLO; also accepts external clock (200–2200 kHz) for EMI reduction via synchronization. |
| AGND | Analog ground | Reference for feedback, reference, and logic - must be star-connected to PGND at single point near IC. |
| VIN | Main input supply | Accepts 4–36 V; requires local 10-μF ceramic input capacitor placed within 5 mm of VIN and PGND pins. |
| PGND | Power ground | Low-side FET source return; connects internally to thermal pad - must be solid copper pour tied to AGND at one point. |
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 ESD robustness in SOIC package. |
| FPWM light-load mode | Forces continuous PWM conduction to eliminate audible noise and maintain <±10 mV output ripple at 10 mA load. |
| Internal compensation | Eliminates need for external Type II/III compensation network - reduces BOM count and layout sensitivity. |
| Soft-start into prebiased output | Prevents reverse current flow when powering up into existing VOUT voltage - critical for hot-swap and rail sequencing. |
| Hiccup-mode short-circuit protection | Enters 5-ms retry cycle after 64 consecutive valley-current-limit trips - protects MOSFETs during sustained overload. |
Applications
| Automotive Instrument Cluster Power Supply | USB-C Charging Module (12 V Input) |
|---|---|
Use Scenario: Powers LCD display, microcontroller, and CAN transceiver in digital instrument clusters with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Primary 5-V/3.3-V buck regulator supplying core logic and interface ICs; operates in FPWM mode to avoid beat frequencies with display refresh timing. Use Value: Delivers stable 3-A output with <1% load regulation across –40°C to +105°C, meeting OEM EMC requirements without added shielding. |
Use Scenario: Converts 12-V vehicle bus to regulated 5-V/3-A for USB-C PD sink applications in center console and rear-seat chargers. IC Role / Device Role / Timing Role: Main DC/DC stage before USB-C controller; uses EN/SYNC to align switching with system clock for deterministic noise shaping. Use Value: Achieves >92% efficiency at 2.4 A (5 V), enabling thermally constrained plastic enclosures without heatsinks or fans. |
| ADAS Camera Power Rail | Telematics Control Unit (TCU) Core Supply |
Use Scenario: Supplies image sensor and ISP in forward-facing camera modules where low quiescent current preserves battery during sleep. IC Role / Device Role / Timing Role: Always-on 3.3-V rail with PFM mode active below 50 mA; soft-start prevents voltage overshoot during wake-up events. Use Value: 75 µA IQ enables >10-day battery hold-up time in parking mode; meets ISO 16750-2 pulse 4a (cold crank) immunity. |
Use Scenario: Powers LTE modem, MCU, and GNSS receiver in cellular-connected TCU units requiring high reliability and long service life. IC Role / Device Role / Timing Role: Primary 1.2-V/3-A core supply derived from 5-V intermediate rail; uses internal soft-start to coordinate with PMIC sequencing. Use Value: Thermal shutdown at 170°C and hiccup protection ensure safe operation during extended high-temp cabin conditions (>85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR23630AQDDARQ1 | Same SOIC-8 package and 400 kHz fixed frequency, but lacks FPWM mode - operates only in PFM at light load. | Higher light-load ripple and potential audible noise; unsuitable where constant-frequency operation is required. | Select LMR23630AQDDARQ1 only if lowest possible IQ (75 µA) is prioritized over ripple/noise control. |
| LMR23630FQDRRRQ1 | 12-pin WSON with RT pin - supports adjustable frequency (150–2425 kHz) and same FPWM capability, but different pinout and thermal metrics (RθJA = 41.5°C/W). | Enables EMI optimization via frequency tuning; requires redesign of PCB layout and thermal pad footprint. | Choose LMR23630FQDRRRQ1 when board space is limited and frequency synchronization or higher efficiency at 24 V input is needed. |
Compared with LMR23630AQDDARQ1, LMR23630AFQDDAQ1 adds FPWM for ripple-sensitive loads; compared with LMR23630FQDRRRQ1, it trades frequency flexibility for SOIC-8 compatibility and simplified layout - making it optimal for cost-sensitive, volume automotive designs where 400 kHz is acceptable.
Availability
LMR23630AFQDDAQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB charging, and ADAS camera power supplies requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LMR23630AFQDDAQ1 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 LMR23630AFQDDAQ1 belongs to TI's SIMPLE SWITCHER® automotive-grade DC/DC converter family, designed specifically for robust, low-risk power conversion in safety-critical vehicle subsystems.
FAQ
What is the maximum input voltage rating for the LMR23630AFQDDAQ1?
The LMR23630AFQDDAQ1 has an absolute maximum input voltage rating of 42 V, with recommended operating range from 4 V to 36 V. This allows direct connection to 12-V and 24-V automotive batteries while surviving load-dump transients per ISO 7637-2 Pulse 5a (up to 35 V for 400 ms) without external clamping.
Does the LMR23630AFQDDAQ1 support power-good signaling?
No, the LMR23630AFQDDAQ1 does not include a PGOOD pin. That function is only available on WSON-package variants (e.g., LMR23630APQDRRRQ1). The LMR23630AFQDDAQ1 uses SOIC-8 packaging with EN/SYNC, FB, BOOT, SW, VCC, AGND, VIN, and PGND pins - no dedicated open-drain power-good output.
Can the LMR23630AFQDDAQ1 be synchronized to an external clock?
Yes, the LMR23630AFQDDAQ1 supports external clock synchronization via its EN/SYNC pin. An AC-coupled square wave (2.8–5.5 V amplitude, ≥100 ns pulse width) in the 200–2200 kHz range can be injected to lock switching frequency - useful for EMI reduction in multi-rail systems.
What is the minimum on-time specification for the LMR23630AFQDDAQ1?
The LMR23630AFQDDAQ1 has a guaranteed minimum on-time of 60 ns. This enables high-duty-cycle operation down to VOUT/VIN ≈ 0.13 at 400 kHz - supporting 5-V output from 12-V input (42% duty) and 3.3-V output from 5-V input (66% duty) without pulse-skipping artifacts.
Is the LMR23630AFQDDAQ1 RoHS and REACH compliant?
Yes, the LMR23630AFQDDAQ1 is RoHS-compliant (lead-free, halogen-free) and REACH-conformant, meeting TI's standard environmental specifications for automotive-grade products. Full material declarations and conflict minerals statements are available in TI's product change notifications and PPAP documentation.
LMR23630AFQDDAQ1 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
LMR23630AFQDDAQ1 FAQ
1.How can I place an order for LMR23630AFQDDAQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR23630AFQDDAQ1 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 LMR23630AFQDDAQ1 reliable?
The price and inventory of LMR23630AFQDDAQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR23630AFQDDAQ1 is usually 5 days.
3.What payment methods are accepted for LMR23630AFQDDAQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR23630AFQDDAQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR23630AFQDDAQ1?
LMR23630AFQDDAQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR23630AFQDDAQ1 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 LMR23630AFQDDAQ1?
For technical support, including LMR23630AFQDDAQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR23630AFQDDAQ1 requirements.
6.How does Aetrix verify that LMR23630AFQDDAQ1 is sourced from the original manufacturer or authorized distributors?
All LMR23630AFQDDAQ1 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 LMR23630AFQDDAQ1 meets industry standards.
7.What is the process for return or replacement of LMR23630AFQDDAQ1?
All LMR23630AFQDDAQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR23630AFQDDAQ1, 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 LMR23630AFQDDAQ1 part is unused and in its original packaging.
Return procedure for LMR23630AFQDDAQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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