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Texas Instruments LM63625DQDRRRQ1
- Part No.:
- LM63625DQDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LM63625DQDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,534
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Product details
Overview
LM63625DQDRRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 2.5A output current, operating from 3.5V to 36V input, with 50ns minimum on-time and 23µA quiescent current. It supports fixed 3.3V/5V or adjustable 1V–20V output, 250kHz–2200kHz switching frequency, and operates in FPWM, AUTO, or sync modes - deployed in ADAS power rails and infotainment domain controllers.
For engineers reviewing the LM63625DQDRRRQ1 datasheet, LM63625DQDRRRQ1 pinout, LM63625DQDRRRQ1 application, or LM63625DQDRRRQ1 equivalent, key selection criteria include its 2.5A rated current in WSON-12 package, automotive-grade thermal performance (RθJA = 47.4°C/W), integrated RESET flag, precision enable threshold (1.425V–1.575V), and spread-spectrum EMI reduction compliant with CISPR 25.
Technical Context
The LM63625DQDRRRQ1 implements peak-current-mode control with automatic PFM/PWM mode transition, enabling high light-load efficiency while maintaining tight regulation. Its internal 1V reference, programmable soft-start (1.6ms typical), and hiccup-mode short-circuit protection (128-cycle trip, 104ms retry) support robust automotive transient handling.
It integrates high-side (93mΩ) and low-side (61mΩ) MOSFETs, features a dedicated CBOOT bootstrap supply, and uses PowerPAD™ thermal enhancement in the DRR (WSON-12) package. The device supports external synchronization (250–2200kHz), pseudo-random spread spectrum (±5% depth, 0.98Hz pattern), and provides precise power-good signaling via open-drain RESET with 112% rising threshold and 2.5% hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports full automotive battery range including cold-crank (4.5V) and load-dump (36V) events. |
| Output Current Rating | 2.5A continuous - enables single-chip power for 5V/3.3V rails in camera modules or display controllers. |
| Quiescent Current | 23µA - sustains low-power sleep modes in always-on vehicle networks without battery drain. |
| Switching Frequency | 250kHz to 2200kHz - allows layout optimization: low fSW for EMI-sensitive zones, high fSW for compact 10mm × 10mm designs. |
| Minimum On-Time | 50ns - enables high step-down ratios (e.g., 24V→3.3V at 2.2MHz) without pulse-skipping instability. |
| Junction Temperature Range | –40°C to +150°C - meets AEC-Q100 Grade 1 ambient requirement (–40°C to +125°C) with 25°C thermal margin. |
| EMI Performance | CISPR 25 Class 5 compliant with spread spectrum - reduces peak radiated emissions without added filtering. |
Pinout & Package
LM63625DQDRRRQ1 is housed in a thermally enhanced 12-pin WSON (DRR) package measuring 3mm × 3mm with exposed PowerPAD™ bottom thermal pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | PGND/DAP | Power ground and thermal sink - must be soldered to large copper area for RθJB = 20.7°C/W performance. |
| 3 | EN | Enable input with precision thresholds (1.425–1.575V high, 0.9–0.94V low) - enables controlled power sequencing in multi-rail systems. |
| 4 | BOOT | Bootstrap capacitor node - requires 220nF ceramic cap between BOOT and SW for high-side gate drive. |
| 5 | AGND | Analog ground reference - separate from PGND to minimize noise coupling into feedback and control circuits. |
| 6 | VCC | Internal 5V LDO output - powers internal logic; decoupled with 1µF to PGND; not for external loads. |
| 7 | FB | Feedback input referenced to 1V internal reference - sets output via external resistor divider in ADJ mode. |
| 8 | SW | Switch node - connects to power inductor; high dv/dt node requiring minimized loop area for EMI control. |
| 9 | VIN | Main input supply - bypassed with 220nF capacitor placed within 1mm of VIN and PGND pins. |
| 10 | RT | Frequency programming input - tied to VCC (400kHz), AGND (2.1MHz), or resistor (250–2200kHz). |
| 11 | VSEL | Output voltage select - AGND = 3.3V, VCC = 5V, 10kΩ-to-AGND = adjustable (1–20V). |
| 12 | SYNC/MODE | Mode/sync input - AGND = AUTO, VCC = FPWM, external clock = synchronized operation. |
| 13 | RESET | Open-drain power-good flag - active-low when FB deviates >9% from target; pulled high externally. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - eliminates requalification effort for body electronics and ADAS ECUs. |
| Integrated PowerPAD™ thermal solution | Enables 2.5A operation in 3mm × 3mm WSON - achieves 47.4°C/W junction-to-ambient without heatsink. |
| Pseudo-random spread spectrum | ±5% frequency dither at 0.98Hz - lowers peak EMI by 10dB without altering filter design or layout. |
| Pin-selectable output voltage | 3.3V, 5V, or 1–20V adjustable - reduces BOM count across variants; no external resistors needed for fixed outputs. |
| Reset flag with precision thresholds | 112% rising / 93% falling threshold on FB - ensures reliable system power sequencing and fault detection. |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
|
Use Scenario: Powering SoC core, DDR memory, and display interface in head-unit systems with variable load profiles. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying multiple downstream LDOs and PMICs. Use Value: 23µA quiescent current extends battery life during vehicle sleep; 50ns min on-time supports 24V→3.3V conversion at 2.2MHz. |
Use Scenario: Generating clean 3.3V rail for image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High-efficiency, low-noise point-of-load converter with fast transient response. Use Value: Spread-spectrum EMI reduction avoids interference with RF receivers; RESET flag enables sensor initialization handshake. |
| Body Control Module | Automotive Lighting Driver |
|
Use Scenario: Supplying microcontroller, CAN transceiver, and sensor interfaces in door module or seat controller. IC Role / Device Role / Timing Role: Robust 2.5A buck converter tolerant of 36V load-dump transients. Use Value: Input UVLO (3.5V rising) prevents brownout during cranking; thermal shutdown (163°C) protects against enclosure overheating. |
Use Scenario: Providing stable 5V bias for LED driver ICs and analog front-ends in adaptive headlights. IC Role / Device Role / Timing Role: High-PWM-frequency (2.2MHz) converter minimizing inductor size in space-constrained lamp housings. Use Value: Compact 10mm × 10mm design enabled by WSON-12 package and integrated MOSFETs; FPWM mode ensures constant frequency under dimming PWM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM63625DQPWPRQ1 | Same silicon, HTSSOP-16 package (5mm × 6.4mm); higher RθJA (43.1°C/W); includes NC pins not present in WSON. | Better thermal dissipation in airflow-rich environments; larger footprint limits use in ultra-compact modules. | Select when board layout allows larger package and thermal performance outweighs size constraints. |
| TPS543B20RVLQ1 | 3.5V–18V input, 3A output, 2.2MHz max fSW; uses external compensation; no integrated spread spectrum. | Higher current rating but narrower input range; requires additional compensation components and EMI filtering. | Select when >2.5A is required and spread-spectrum EMI reduction is handled at system level. |
Compared with LM63625DQPWPRQ1, LM63625DQDRRRQ1 saves 64% board area and improves thermal resistance to PCB but trades off some heatsinking capability; versus TPS543B20RVLQ1, it offers integrated EMI mitigation and smaller BOM at the cost of lower max input voltage and fixed compensation.
Availability
LM63625DQDRRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM63625DQDRRRQ1 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 qualification expertise and AEC-Q100-compliant product development infrastructure.
The LM636x5-Q1 product line delivers high-reliability, feature-rich buck converters optimized for automotive power systems - designed to simplify design-in for infotainment, ADAS, and body electronics while meeting stringent EMI, thermal, and functional safety requirements.
FAQ
What is the maximum input voltage rating for LM63625DQDRRRQ1?
The LM63625DQDRRRQ1 has an absolute maximum input voltage rating of 42V for the WSON package, with recommended operating range from 3.5V to 36V. This supports full automotive battery operation including load-dump conditions. Exceeding 42V may cause permanent damage per Absolute Maximum Ratings table in the datasheet. LM63625DQDRRRQ1 must be used within this limit to ensure reliability in harsh vehicle environments.
Does LM63625DQDRRRQ1 support adjustable output voltage?
Yes, LM63625DQDRRRQ1 supports adjustable output voltage from 1V to 20V using the VSEL pin configured with a 10kΩ resistor to AGND, which disables the internal voltage divider and enables external FB resistor selection. Fixed 3.3V and 5V outputs are also available by tying VSEL to AGND or VCC respectively. All configurations maintain ±1.5% output accuracy over temperature and load.
How does the spread-spectrum feature work in LM63625DQDRRRQ1?
The LM63625DQDRRRQ1 implements pseudo-random spread spectrum with ±5% frequency modulation depth and a 0.98Hz pattern repetition rate. This dithers the switching frequency to distribute EMI energy across a wider bandwidth, reducing peak emissions without altering layout or adding filters. It is enabled by default and compliant with CISPR 25 Class 5 requirements for automotive applications.
What thermal performance can be expected from LM63625DQDRRRQ1 in its WSON package?
In the WSON-12 (DRR) package, LM63625DQDRRRQ1 achieves a junction-to-ambient thermal resistance (RθJA) of 47.4°C/W on a standard 4-layer JEDEC board. With proper PowerPAD™ soldering to a 1-in² copper area, it sustains 2.5A continuous output at +85°C ambient. Thermal shutdown activates at 163°C (typical), with recovery at 150°C, ensuring safe operation under overload or poor airflow.
Is LM63625DQDRRRQ1 pin-compatible with other devices in the LM636x5-Q1 family?
LM63625DQDRRRQ1 shares identical pinout with LM63615DQDRRRQ1 (1.5A version) in the WSON-12 package, enabling current-scaling flexibility on the same PCB layout. It is not pin-compatible with HTSSOP variants (e.g., LM63625DQPWPRQ1) due to differing pin count and placement. Functional compatibility exists across the family for VSEL, RT, SYNC/MODE, and RESET logic levels.
LM63625DQDRRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 20V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 400kHz, 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-WSON (3x3)
LM63625DQDRRRQ1 FAQ
1.How can I place an order for LM63625DQDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM63625DQDRRRQ1 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 LM63625DQDRRRQ1 reliable?
The price and inventory of LM63625DQDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM63625DQDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LM63625DQDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM63625DQDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM63625DQDRRRQ1?
LM63625DQDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM63625DQDRRRQ1 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 LM63625DQDRRRQ1?
For technical support, including LM63625DQDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM63625DQDRRRQ1 requirements.
6.How does Aetrix verify that LM63625DQDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM63625DQDRRRQ1 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 LM63625DQDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LM63625DQDRRRQ1?
All LM63625DQDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM63625DQDRRRQ1, 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 LM63625DQDRRRQ1 part is unused and in its original packaging.
Return procedure for LM63625DQDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM63625DQDRRRQ1 Tags
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