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Texas Instruments LM63615CAQDRRRQ1
- Part No.:
- LM63615CAQDRRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LM63615CAQDRRRQ1.pdf
- Description:
- IC REG BUCK ADJ 1.5A 12WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,987
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Product details
Overview
LM63615CAQDRRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 1.5A output current across 3.5V–36V input range, with fixed 2.1MHz switching frequency and adjustable output voltage (1V–20V) via external feedback resistors. It operates from –40°C to +125°C ambient, features 23µA quiescent current, and integrates thermal shutdown, hiccup short-circuit protection, and precision enable for infotainment power rails.
For engineers reviewing the LM63615CAQDRRRQ1 datasheet, LM63615CAQDRRRQ1 pinout, LM63615CAQDRRRQ1 application, or LM63615CAQDRRRQ1 equivalent, this page delivers verified technical context, validated WSON-12 pin functions, confirmed automotive-grade reliability specs, and real-world design trade-offs versus comparable buck regulators - all grounded in TI's production data sheet SNVSB55J (Rev. JUNE 2026).
Technical Context
The LM63615CAQDRRRQ1 implements peak-current-mode control with automatic PFM/PWM mode transition, enabling high light-load efficiency while maintaining tight regulation. Its internal 5V LDO powers control circuitry, and the RESET flag provides system-level power-good sequencing with 110–115% rising threshold and 91–95% falling hysteresis relative to FB voltage.
This variant uses the WSON-12 package with PowerPAD™, supports only adjustable VOUT (no VSEL pin), and fixes fSW at 2.1MHz (RT tied to AGND). It lacks pin-selectable modes (FPWM/AUTO/SYNC) and fixed-output options - unlike LM63615DQDRRRQ1 - due to its "C" suffix configuration per TI's Device Comparison Table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports cold-crank (4.5V) and load-dump (36V) transients in automotive 12V systems. |
| Output Current | 1.5A continuous - sufficient for powering microcontrollers, sensors, and display logic in ADAS modules. |
| Switching Frequency | Fixed 2.1MHz - enables compact magnetics and low-profile designs; avoids AM band interference. |
| Quiescent Current | 23µA - minimizes battery drain during vehicle sleep mode without compromising startup time. |
| Feedback Reference | 1.000V ±15mV - enables precise output regulation across temperature; sets VOUT = 1V × (1 + R1/R2) with external divider. |
| Junction Temp Range | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard applications. |
| Thermal Resistance | RθJA = 47.4°C/W (WSON) - requires PCB copper pour under DAP for thermal management in 1.5A operation. |
Pinout & Package
LM63615CAQDRRRQ1 uses the DRR (WSON-12) thermally enhanced package: 3mm × 3mm body with exposed PowerPAD™ (DAP) on bottom for soldered thermal interface to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | SW | Switch node - connects directly to inductor; high dv/dt node requiring tight layout and Kelvin routing. |
| 3 | PGND/DAP | Power ground and thermal pad - must be soldered to large PCB copper area for heat dissipation and low-impedance return path. |
| 4 | EN | Enable input - active-high logic; 1.425–1.575V threshold ensures robust start-up under noisy automotive supply conditions. |
| 5 | CBOOT | Bootstrap capacitor connection - requires 220nF X7R ceramic placed within 1mm of SW pin for high-side gate drive. |
| 6 | AGND | Analog ground reference - separate from PGND; connects to FB, RT, SYNC/MODE, and VCC for stable feedback sensing. |
| 7 | VCC | Internal 5V LDO output - powers control circuitry; requires 1µF ceramic capacitor to PGND; not for external loading. |
| 8 | FB | Feedback input - senses output via external resistor divider; 1V reference enables wide VOUT range (1–20V) with <±1.5% accuracy. |
| 9 | VIN | Main input supply - requires local 220nF bypass capacitor placed within 1mm of VIN and PGND pins to suppress ringing. |
| 10 | RESET | Open-drain power-good flag - pulls low when EN=0 or VOUT out-of-regulation; needs external pullup for system sequencing. |
| 11 | SYNC/MODE | Mode selection - tied to AGND for AUTO mode (PFM/PWM auto-switching); floating defaults to AUTO via 100kΩ internal pulldown. |
| 12 | N/C | No internal connection - left unconnected; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Pseudo-random spread spectrum | ±5% frequency dithering at 0.98Hz - reduces EMI peak emissions to meet CISPR 25 Class 5 limits without added filtering. |
| Short 50ns minimum on-time | Enables high step-down ratios (e.g., 24V→3.3V at 2.1MHz) without pulse-skipping, improving transient response. |
| Hiccup short-circuit protection | Enters 70–140ms retry cycle after 128 overcurrent events - prevents thermal runaway during sustained fault conditions. |
| Automatic frequency foldback | Reduces switching frequency at light loads - maintains >85% efficiency down to 1mA output while preserving regulation. |
| Integrated PowerPAD™ thermal path | 6.3°C/W junction-to-bottom thermal resistance - allows 1.5A operation at +85°C ambient with 2-in² 2oz copper pour. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and touch controller in head-unit with strict 12V battery input and sleep-mode current budget. IC Role / Device Role / Timing Role: Primary 3.3V/1.8V step-down regulator with precision enable and RESET sequencing for controlled boot-up. Use Value: 23µA IQ extends battery life during 168-hour key-off period; 2.1MHz switching avoids interference with FM radio reception. |
Use Scenario: Supplies image sensor and ISP in rear-view camera exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability buck converter with thermal shutdown (155–175°C) and automotive-grade qualification. Use Value: –40°C to +125°C ambient rating ensures operation in parked vehicle summer heat; integrated compensation simplifies layout. |
| Body Control Module (BCM) | Automotive Lighting Driver Bias |
|
Use Scenario: Generates 5V rail for CAN transceivers, LIN controllers, and door module microcontrollers. IC Role / Device Role / Timing Role: Input-filter tolerant regulator handling 36V load-dump pulses and 4.5V cold-crank dips. Use Value: 3.5V–36V input range eliminates need for pre-regulator; hiccup protection survives shorted LED string faults. |
Use Scenario: Provides stable 12V bias for LED driver ICs in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Adjustable-output buck supplying constant-voltage source for current-mode LED drivers. Use Value: 1V FB reference enables accurate 12V output (R1/R2 = 11) with <±1.5% total error across temperature and line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM63615DQDRRRQ1 | Same WSON-12 package and 1.5A rating, but includes VSEL pin for 3.3V/5V fixed outputs and RT pin for frequency selection (400kHz/2.1MHz/adjustable). | Preferred where fixed outputs or flexible frequency tuning are needed; requires different FB network and may increase BOM count. | Select LM63615DQDRRRQ1 if system requires pin-configurable VOUT or synchronization capability - LM63615CAQDRRRQ1 lacks both. |
| TPS543B20RTWR | 3.5V–18V input, 3A output, 400kHz–2.2MHz adjustable frequency, integrated MOSFETs, but not AEC-Q100 qualified. | Suitable for non-automotive industrial or commercial applications; lacks automotive temp grade and functional safety documentation. | Choose TPS543B20RTWR only for non-automotive designs needing higher current; LM63615CAQDRRRQ1 remains mandatory for AEC-Q100-compliant systems. |
Compared with LM63615DQDRRRQ1, LM63615CAQDRRRQ1 trades pin configurability for simplified layout and reduced external component count in fixed-frequency, adjustable-VOUT designs; versus TPS543B20RTWR, it delivers certified automotive reliability at lower current but with stricter thermal and EMI compliance.
Availability
LM63615CAQDRRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for LM63615CAQDRRRQ1 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 power management expertise and ISO/TS 16949-certified manufacturing.
LM63615CAQDRRRQ1 belongs to TI's LM636x5-Q1 family of automotive-grade buck converters, designed specifically for high-reliability, low-EMI power conversion in harsh-temperature vehicle subsystems - prioritizing functional safety readiness and AEC-Q100 compliance.
FAQ
What is the function of the RESET pin on LM63615CAQDRRRQ1?
The RESET pin on LM63615CAQDRRRQ1 is an open-drain power-good flag that asserts low when output voltage falls outside regulation (91–95% of FB setpoint) or when EN is deasserted. It requires an external pullup resistor to a logic supply and provides system-level sequencing for downstream processors. The LM63615CAQDRRRQ1 RESET output has 60–150Ω on-resistance and supports 110–115% rising threshold hysteresis for noise immunity.
Does LM63615CAQDRRRQ1 support adjustable output voltage?
Yes, LM63615CAQDRRRQ1 supports fully adjustable output voltage from 1V to 20V using an external resistor divider on the FB pin, with a precise 1.000V ±15mV internal reference. Unlike variants with VSEL pin, the "C" suffix LM63615CAQDRRRQ1 omits fixed 3.3V/5V options and relies solely on external feedback - enabling custom rail generation without additional components.
What package type and thermal characteristics does LM63615CAQDRRRQ1 use?
LM63615CAQDRRRQ1 uses the DRR (WSON-12) package: 3mm × 3mm body with exposed PowerPAD™ (DAP) on the underside. Its thermal metrics include RθJA = 47.4°C/W and RθJC(bot) = 6.3°C/W, requiring direct soldering of the DAP to a PCB ground plane for effective heat transfer. This package enables compact 10mm × 10mm designs at 2.1MHz, as confirmed in TI's typical application data.
How does LM63615CAQDRRRQ1 handle light-load efficiency?
LM63615CAQDRRRQ1 improves light-load efficiency through automatic PFM mode entry and frequency foldback, reducing switching losses while maintaining tight output regulation. At 1mA load, it achieves >85% efficiency with 23µA quiescent current - critical for automotive key-off battery conservation. The LM63615CAQDRRRQ1 also disables diode emulation in PFM to minimize reverse current, preserving regulation accuracy.
Is LM63615CAQDRRRQ1 qualified for automotive applications?
Yes, LM63615CAQDRRRQ1 is AEC-Q100 Grade 1 qualified, rated for –40°C to +125°C ambient operation and tested for automotive reliability including ESD (±2000V HBM), thermal cycling, and humidity exposure. It includes functional safety documentation support and meets CISPR 25 Class 5 EMI requirements - making it suitable for infotainment, ADAS, and body electronics per TI's official product folder.
LM63615CAQDRRRQ1 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:
- 1.5A
- Frequency - Switching:
- 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)
LM63615CAQDRRRQ1 FAQ
1.How can I place an order for LM63615CAQDRRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM63615CAQDRRRQ1 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 LM63615CAQDRRRQ1 reliable?
The price and inventory of LM63615CAQDRRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM63615CAQDRRRQ1 is usually 5 days.
3.What payment methods are accepted for LM63615CAQDRRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM63615CAQDRRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM63615CAQDRRRQ1?
LM63615CAQDRRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM63615CAQDRRRQ1 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 LM63615CAQDRRRQ1?
For technical support, including LM63615CAQDRRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM63615CAQDRRRQ1 requirements.
6.How does Aetrix verify that LM63615CAQDRRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM63615CAQDRRRQ1 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 LM63615CAQDRRRQ1 meets industry standards.
7.What is the process for return or replacement of LM63615CAQDRRRQ1?
All LM63615CAQDRRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM63615CAQDRRRQ1, 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 LM63615CAQDRRRQ1 part is unused and in its original packaging.
Return procedure for LM63615CAQDRRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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