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Texas Instruments LM63615DQPWPRQ1
- Part No.:
- LM63615DQPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM63615DQPWPRQ1.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:877
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Product details
Overview
LM63615DQPWPRQ1 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 pin-selectable 3.3V/5V/fixed or adjustable output (1V–20V), 400kHz/2.1MHz switching frequency, and 23µA quiescent current - deployed in infotainment power rails and ADAS camera modules.
For engineers reviewing the LM63615DQPWPRQ1 datasheet, LM63615DQPWPRQ1 pinout, LM63615DQPWPRQ1 application, or LM63615DQPWPRQ1 equivalent, key selection criteria include its HTSSOP-16 PowerPAD™ package thermal performance (RθJA = 43.1°C/W), 50ns minimum on-time for high VIN-to-VOUT ratios, RESET flag timing (2–5ms valid FB delay), and functional safety documentation support for ISO 26262 ASIL-B system integration.
Technical Context
This peak-current-mode buck regulator operates in PWM at full load and auto-transitions to PFM with diode emulation at light loads, maintaining >85% efficiency down to 1mA while enabling tight load regulation via automatic frequency foldback. Its internal compensation eliminates external loop components, and integrated 1V reference with ±1.5% VOUT accuracy over –40°C to +125°C ambient enables robust operation in engine bay and head unit environments.
The device implements cycle-by-cycle current limiting (1.9–2.7A short-circuit threshold), hiccup-mode fault recovery (70–140ms retry delay), thermal shutdown (155–175°C trip), and UVLO with hysteresis (3.5V rising / 2.6–3.0V falling). Pin-strapped configuration (VSEL, RT, SYNC/MODE) avoids firmware dependency while supporting CISPR 25 Class 5 EMI compliance via pseudo-random spread spectrum (±5% dither, 0.98Hz pattern).
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 per ISO 16750-2 without external protection. |
| Output Current | 1.5A continuous - validated across –40°C to +150°C junction temperature with thermal derating per RθJA = 43.1°C/W. |
| Quiescent Current | 23µA - enables always-on systems (e.g., telematics wake-up circuits) to meet <100µA total system standby budgets. |
| Switching Frequency | 400kHz or 2.1MHz (pin-selectable) - 2.1MHz allows <1µH inductors and compact 10mm × 10mm layouts; 400kHz improves light-load efficiency. |
| Output Accuracy | ±1.5% over line/load/temperature - ensures stable 3.3V/5V rail delivery for MCU cores and image sensors without post-regulation. |
| Minimum On-Time | 50ns - enables 12V-to-1.2V conversion at 2.1MHz (D ≈ 10%) without pulse-skipping artifacts. |
| Power-Good Flag | RESET with 110–115% upper / 91–95% lower threshold - provides clean sequencing for FPGA configuration or microcontroller boot. |
Pinout & Package
LM63615DQPWPRQ1 uses the HTSSOP-16 PowerPAD™ package (PWP0016D, 5.00mm × 4.00mm footprint) with exposed thermal pad (DAP) soldered to PCB ground plane for low RθJC(bot) = 4.5°C/W. Pin 17 (DAP) is electrically connected to PGND and serves as primary heat sink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 SW | Switch node | Connects to inductor; carries high di/dt; requires tight layout with minimal loop area to suppress EMI. |
| 3 CBOOT | Bootstrap supply | 220nF capacitor to SW establishes gate drive voltage for high-side MOSFET (RDS-ON-HS = 93mΩ). |
| 4 VCC | Internal 5V LDO output | Powers control circuitry; must be decoupled with 1µF to PGND; not for external loading. |
| 5 RT | Frequency programming | Tie to VCC (400kHz), AGND (2.1MHz), or resistor (250–2200kHz); floating disables switching. |
| 6 VSEL | Output voltage select | Tie to VCC (5V), AGND (3.3V), or 10kΩ to AGND (adjustable 1–20V); fixed at power-on. |
| 7 SYNC/MODE | Mode control | Tie to VCC (FPWM), AGND (AUTO), or external clock (250–2200kHz sync); internal 100kΩ pulldown. |
| 8 RESET | Open-drain power-good | Pulls low when EN = 0 or FB < 91% of target; requires external pullup for logic-level signaling. |
| 9 FB | Feedback input | Regulates to 1V (ADJ), 3.3V, or 5V; leakage <100nA enables high-resistor dividers for low IQ. |
| 10 AGND | Analog ground | Reference for FB, VSEL, RT, SYNC; separate from PGND to avoid noise coupling into feedback path. |
| 11 EN | Enable input | Logic-high active (VEN-H = 1.425–1.575V); precision threshold enables direct battery monitoring. |
| 12,13 VIN | Main input supply | Requires local 220nF ceramic cap within 1mm of pin and PGND to suppress ringing and ensure stability. |
| 14 NC | No connect | Not internally bonded; leave unconnected or tie to AGND for mechanical stability. |
| 15,16 PGND | Power ground | High-current return path for SW and VIN; connect to AGND at single point near DAP. |
| 17 DAP | Thermal pad / ground | Soldered to PCB ground plane; primary thermal path (RθJC(bot) = 4.5°C/W) and EMI shield. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive cabin and under-hood temperature requirements without derating. |
| Integrated 1V reference with ±1.5% accuracy | Enables precise output regulation across temperature and line/load variations without external trimming components. |
| Pin-selectable output voltage (3.3V/5V/ADJ) | Eliminates external feedback resistors for standard rails, reducing BOM count and PCB area while maintaining 1V FB node for noise immunity. |
| 23µA quiescent current | Supports always-on domains (e.g., CAN wake-up receivers) with sub-100µA system standby budgets in vehicle sleep modes. |
| RESET flag with 2–5ms FB validation delay | Prevents false power-good assertion during soft-start or transient recovery, ensuring reliable microcontroller boot sequencing. |
| Thermal shutdown with 150°C recovery hysteresis | Protects against sustained overload or poor heatsinking while enabling autonomous recovery without host intervention. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head unit with 12V battery input and cold-crank resilience. IC Role / Device Role / Timing Role: Primary 3.3V/5V step-down regulator with RESET flag enabling controlled SoC reset after power stabilization. Use Value: 50ns min on-time supports 12V-to-3.3V conversion at 2.1MHz, enabling <10mm² solution size while meeting CISPR 25 Class 5 EMI limits. |
Use Scenario: Supplies image sensor and ISP in forward-facing camera with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: High-efficiency 5V buck converter with PFM mode extending battery life during parking surveillance mode. Use Value: 23µA IQ and AUTO mode reduce average current to <50µA at 100µA load, doubling parking-mode runtime versus fixed-frequency alternatives. |
| Body Control Module (BCM) Rail | Automotive Lighting Driver Bias |
|
Use Scenario: Generates 5V rail for microcontroller, CAN transceiver, and LIN interface in door module or seat controller. IC Role / Device Role / Timing Role: Robust input-stage regulator handling load-dump transients up to 36V and reverse-battery protection via external FET. Use Value: 36V absolute max VIN and thermal shutdown (155–175°C) prevent failure during jump-start events or prolonged high-ambient conditions. |
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 (via VSEL + external divider) delivering 12V from 14V alternator supply with tight load regulation. Use Value: ±1.5% VOUT accuracy and 1V FB reference minimize output drift across temperature, ensuring consistent LED brightness control. |
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 | 2.5A rated output current; identical pinout, package, and feature set except higher current capability and adjusted current-limit thresholds (3.18–4.41A vs. 1.9–2.7A). | Required where peak loads exceed 1.5A (e.g., multi-camera clusters), but increases thermal design complexity at same PCB area. | Select LM63625DQPWPRQ1 only if sustained >1.2A load current is confirmed; otherwise LM63615DQPWPRQ1 offers better light-load efficiency and smaller thermal solution. |
| TPS54361QRTETQ1 | 3.5A output, wider 3.5–60V input, but larger SOIC-8 package (6.2mm × 4.9mm), no integrated PowerPAD™, and 125µA IQ - lacks spread spectrum and RESET flag. | Suitable for higher-input-voltage systems (e.g., commercial truck 24V), but requires external compensation and additional sequencing logic. | Choose TPS54361QRTETQ1 only when >36V input or >2.5A output is mandatory; LM63615DQPWPRQ1 provides superior EMI, thermal, and integration for 12V automotive platforms. |
Compared with LM63625DQPWPRQ1, LM63615DQPWPRQ1 delivers optimized thermal performance and light-load efficiency for sub-1.5A applications, while TPS54361QRTETQ1 trades integration and EMI for extended input range - making LM63615DQPWPRQ1 the preferred choice for compact, low-noise 12V infotainment and ADAS supplies.
Availability
LM63615DQPWPRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body electronics requiring stable component supply with AEC-Q100 qualification and long-term production continuity.
Supply support for LM63615DQPWPRQ1 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.
LM63615DQPWPRQ1 belongs to TI's LM636x5-Q1 family of automotive synchronous buck converters, designed specifically for space-constrained, thermally demanding vehicle subsystems requiring high reliability, low EMI, and functional safety support.
FAQ
What is the maximum input voltage rating for LM63615DQPWPRQ1?
The LM63615DQPWPRQ1 has an absolute maximum input voltage rating of 40V across the VIN-to-PGND pins for the HTSSOP package. It operates continuously across 3.5V to 36V, covering automotive cold-crank (down to ~4.5V) and load-dump (up to 36V) conditions per ISO 16750-2 without external clamping. Exceeding 40V risks permanent damage.
How does the RESET flag on LM63615DQPWPRQ1 behave during startup and fault conditions?
The LM63615DQPWPRQ1 RESET pin is an open-drain output that remains low until FB voltage reaches 110–115% of the target (e.g., 5.5V for 5V mode), then transitions high after a 2–5ms validation delay. It pulls low again if FB falls below 91–95% of target or when EN is deasserted. This ensures reliable power sequencing for downstream MCUs and FPGAs.
Can LM63615DQPWPRQ1 operate in forced PWM mode, and how is it configured?
Yes, LM63615DQPWPRQ1 supports forced PWM (FPWM) mode via the SYNC/MODE pin. Tie SYNC/MODE to VCC to enable FPWM - disabling PFM diode emulation and maintaining constant switching frequency regardless of load. This eliminates audible noise and ensures predictable EMI profiles in noise-sensitive applications like audio subsystems.
What thermal performance can be expected from LM63615DQPWPRQ1 in a typical 4-layer PCB layout?
In a standard 4-layer JEDEC board with 2oz copper and the DAP soldered to a 1000mm² ground plane, LM63615DQPWPRQ1 achieves RθJA = 43.1°C/W. At 1.5A output with 12V input, this yields ~65°C junction rise above ambient - well within the –40°C to +150°C operating range. Thermal derating begins above 125°C ambient.
Is LM63615DQPWPRQ1 compatible with external synchronization, and what is the supported frequency range?
Yes, LM63615DQPWPRQ1 accepts external clock signals on the SYNC/MODE pin for synchronization across multiple converters. The supported range is 250kHz to 2200kHz, matching its internal adjustable frequency capability. External sync ensures deterministic phase relationships and reduces beat-frequency EMI in multi-rail systems like domain controllers.
LM63615DQPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- 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:
- 400kHz, 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM63615DQPWPRQ1 FAQ
1.How can I place an order for LM63615DQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM63615DQPWPRQ1 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 LM63615DQPWPRQ1 reliable?
The price and inventory of LM63615DQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM63615DQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for LM63615DQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM63615DQPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM63615DQPWPRQ1?
LM63615DQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM63615DQPWPRQ1 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 LM63615DQPWPRQ1?
For technical support, including LM63615DQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM63615DQPWPRQ1 requirements.
6.How does Aetrix verify that LM63615DQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All LM63615DQPWPRQ1 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 LM63615DQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of LM63615DQPWPRQ1?
All LM63615DQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM63615DQPWPRQ1, 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 LM63615DQPWPRQ1 part is unused and in its original packaging.
Return procedure for LM63615DQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM63615DQPWPRQ1 Tags
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AZ34063UMTR-G1
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MC34063EBD-TR
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