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Texas Instruments LM536003QDSXTQ1
- Part No.:
- LM536003QDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM536003QDSXTQ1.pdf
- Description:
- IC REG BUCK 3.3V 650MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:627
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Product details
Overview
LM536003QDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering a fixed 3.3-V output at up to 650 mA, operating from 3.55 V to 36 V input with transient tolerance to 42 V, featuring 2.1-MHz fixed switching frequency, 23-µA quiescent current, and integrated RESET output with delay and filtering - deployed in ADAS camera modules and body control units.
For engineers reviewing the LM536003QDSXTQ1 datasheet, LM536003QDSXTQ1 pinout, LM536003QDSXTQ1 application, or LM536003QDSXTQ1 equivalent, key selection criteria include its 3.3-V fixed output, 650-mA load capability, wettable-flank WSON-10 package, automotive-grade thermal range (–40°C to 150°C junction), and integrated reset functionality eliminating external supervisory ICs.
Technical Context
The LM536003QDSXTQ1 implements peak current mode control with internal compensation, enabling stable regulation across wide input (3.55–36 V) and output (3.3 V ±2%) ranges without external loop components. Its 2.1-MHz switching frequency supports compact 2.2-µH inductors and ceramic output capacitors while staying above the AM band for reduced EMI filtering.
It integrates a 3-V internal LDO for biasing control circuitry, open-drain RESET with 4–8-ms activation delay and 24-µs glitch filter, and dual-mode operation: forced PWM (via SYNC/MODE high) or AUTO mode with diode emulation at light loads - all within a –40°C to 150°C junction temperature envelope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over full load and temperature; enables direct powering of MCU I/O, sensors, and SerDes interfaces without external feedback resistors. |
| Max Output Current | 650 mA continuous; sufficient for single-camera ISP power rails or low-power domain supplies in automotive body electronics. |
| Input Voltage Range | 3.55 V to 36 V (transient to 42 V); supports cold-crank (≥3.55 V) and load-dump (≤42 V) conditions per ISO 7637-2 without external protection. |
| Quiescent Current | 23 µA typical; allows always-on operation in vehicle sleep modes while meeting <100-µA system standby targets. |
| Switching Frequency | 2.1 MHz ±10%; enables use of small 2.2-µH shielded inductors and 10–22-µF X7R ceramics, reducing solution size by >30% vs 500-kHz converters. |
| RESET Output | Open-drain with 4–8 ms delay and 24-µs filter; provides clean, glitch-immune power-good signal for microcontroller boot sequencing without external RC networks. |
| Junction Temp Range | –40°C to 150°C; validated per AEC-Q100 Grade 1, supporting under-hood and camera module placement near heat sources. |
Pinout & Package
LM536003QDSXTQ1 uses a 10-pin WSON (DSX) package, 3.0 mm × 3.0 mm, with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects directly to inductor; carries high di/dt switching current; requires tight layout to minimize EMI and voltage spikes. |
| 2 BOOT | High-side gate driver supply | Supplies bootstrap capacitor (100 nF) between SW and BOOT; critical for proper high-side MOSFET turn-on timing. |
| 3 VCC | Internal 3-V regulator output | Powers internal control logic; requires 1-µF ceramic capacitor to AGND for stability in fixed-output configuration. |
| 4 FB | Feedback input | Direct connection to 3.3-V output; senses regulated voltage; bypassed with 10-nF capacitor for noise immunity. |
| 5 AGND | Analog ground reference | Ground return for FB and internal error amplifier; must be connected to low-impedance ground plane adjacent to FB pin. |
| 6 RESET | Open-drain reset output | Asserts low during fault or EN deactivation; requires external pull-up resistor (typically 10 kΩ) to system rail. |
| 7 EN | Enable input | Active-high logic input; threshold 1.7–2.0 V; hysteresis 400 mV ensures noise immunity in automotive environments. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-µF ceramic input capacitor placed directly between VIN and GND. |
| 9 SYNC/MODE | Mode control & sync input | Tied low for AUTO mode (PFM at light load); tied high for forced PWM; accepts 1.9–2.3 MHz external clock for synchronization. |
| 10 GND | Power ground | Main return path for high-current loops; must be thermally and electrically connected to exposed DAP pad. |
| DAP | Exposed thermal pad | Electrically connected to GND only; mandatory solder connection to inner-layer ground plane for thermal performance (RθJA = 46.2°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient (–40°C to 150°C junction), HBM ±2 kV, CDM ±750 V - meets automotive functional safety baseline requirements. |
| Integrated RESET with delay & filter | Eliminates need for external supervisor IC; 4–8 ms release delay prevents premature MCU wake-up during brown-out recovery. |
| 2.1-MHz fixed-frequency operation | Enables use of miniature 2.2-µH inductors and avoids AM radio band (0.53–1.71 MHz), reducing EMI filter complexity and cost. |
| Low 23-µA quiescent current | Supports >10-year battery life in always-on vehicle modules; maintains regulation down to 3.55 V input during cold-crank. |
| Wettable-flank WSON-10 package | Enables AOI-compatible solder joint inspection on automotive PCBs, improving manufacturing yield and field reliability. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Auxiliary Rail |
|---|---|
Use Scenario: Powers image signal processor (ISP) and CMOS sensor in rear-view or surround-view camera modules mounted near exhaust or engine bay. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator providing stable, low-noise power with fast transient response to handle burst-mode sensor readouts. Use Value: 650-mA capability and 150°C junction rating enable direct mounting on camera PCB without heatsink; 23-µA IQ extends parking-mode runtime. |
Use Scenario: Supplies auxiliary 3.3-V rail for CAN transceivers, Ethernet PHYs, and watchdog timers in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: Secondary regulated supply decoupled from main 5-V rail; RESET output synchronizes with MCU boot sequence. Use Value: Integrated RESET with 24-µs filter rejects ESD-induced glitches; wettable flanks ensure solder joint integrity in high-vibration environments. |
| Body Control Module (BCM) Subsystem | Automotive Infotainment Display Backlight Bias |
Use Scenario: Powers microcontroller peripherals (LIN transceivers, LED drivers, EEPROM) in door modules and seat control units. IC Role / Device Role / Timing Role: Always-on 3.3-V regulator maintaining communication readiness during vehicle sleep; EN pin controlled by BCM wake-up line. Use Value: 1.8-µA shutdown current minimizes battery drain; 42-V transient tolerance eliminates need for TVS diodes on 12-V input. |
Use Scenario: Generates bias voltage for display timing controller (TCON) and local LED driver ICs in center-stack infotainment displays. IC Role / Device Role / Timing Role: Fixed 3.3-V source with precise output accuracy (±2%) ensuring stable TCON reference and consistent display startup timing. Use Value: 3.3-V fixed output eliminates feedback resistor network; 2.1-MHz switching reduces audible noise from ceramic capacitors near user interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536013QDSXTQ1 | Same pinout and features, but rated for 1-A max output current; higher current limit (1.5–2.1 A) and lower Rdson (200 mΩ low-side). | Required where load exceeds 650 mA (e.g., multi-sensor camera clusters); otherwise identical thermal and layout footprint. | Select LM536013QDSXTQ1 only if peak load >650 mA; shares same PCB design but requires validation of inductor saturation current. |
| TPS62130AQDGSRQ1 | 3-V to 17-V input, 3-A output, 2.5-MHz switching; no integrated RESET; uses 14-pin WQFN with different pinout and no wettable flanks. | Suitable for higher-current domains (e.g., radar SoC cores); lacks automotive RESET function and cold-crank support below 3.55 V. | Choose TPS62130AQDGSRQ1 when >1-A output or wider VIN range is needed; requires full PCB redesign due to pinout and package mismatch. |
Compared with LM536013QDSXTQ1, LM536003QDSXTQ1 offers optimized cost and thermal performance for ≤650-mA loads; versus TPS62130AQDGSRQ1, it delivers superior cold-crank capability, integrated RESET, and AOI-ready packaging - making it the preferred choice for space-constrained, safety-critical 3.3-V camera and BCM rails.
Availability
LM536003QDSXTQ1 is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS domain controller auxiliary rails, and body control module subsystems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM536003QDSXTQ1 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 automotive-grade power management solutions, with decades of automotive qualification expertise and broad AEC-Q100 product portfolio.
LM536003QDSXTQ1 belongs to TI's automotive synchronous buck regulator family designed specifically for demanding vehicle environments - emphasizing ultra-low IQ, wide VIN range, integrated supervision, and robust thermal performance in compact packages.
FAQ
What is the maximum load current supported by the LM536003QDSXTQ1?
The LM536003QDSXTQ1 supports a maximum continuous output current of 650 mA. This rating is validated across the full AEC-Q100 Grade 1 temperature range (–40°C to 125°C ambient) and accounts for thermal derating at elevated junction temperatures. Exceeding 650 mA may trigger current-limit protection or thermal shutdown; for higher loads, consider the pin-compatible LM536013QDSXTQ1 variant.
Does the LM536003QDSXTQ1 require external feedback resistors for its 3.3-V output?
No, the LM536003QDSXTQ1 provides a factory-trimmed fixed 3.3-V output and does not require external feedback resistors. The FB pin connects directly to the output node, and internal precision voltage reference (±1% initial accuracy) ensures regulation without external components - simplifying layout and reducing BOM count.
How does the RESET output of the LM536003QDSXTQ1 behave during startup and fault conditions?
The LM536003QDSXTQ1 RESET output remains low until the output reaches 94–97% of nominal 3.3 V and remains stable for ≥4–8 ms. It asserts low again during undervoltage, overtemperature, or EN deactivation. The 24-µs internal glitch filter prevents false triggering from transient noise, and the open-drain structure requires an external pull-up resistor to a valid system rail.
Can the LM536003QDSXTQ1 operate during automotive cold-crank conditions?
Yes, the LM536003QDSXTQ1 operates down to 3.55 V input after startup and can sustain regulation at 3.8 V input under full 650-mA load - meeting typical cold-crank requirements (≥3.5 V for 15–30 seconds). Its 23-µA quiescent current and internal UVLO with 3.2–3.75 V rising threshold ensure reliable start-up even with weak batteries.
What package type and thermal characteristics does the LM536003QDSXTQ1 use?
The LM536003QDSXTQ1 uses a 10-pin WSON (DSX) package measuring 3.0 mm × 3.0 mm with wettable flanks. Its thermal resistance is RθJA = 46.2°C/W (JEDEC High-K board), RθJC(bot) = 4.1°C/W, and the exposed DAP pad must be soldered to a solid ground plane for optimal heat dissipation and reliability in automotive under-hood applications.
LM536003QDSXTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.8V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 650mA
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
LM536003QDSXTQ1 FAQ
1.How can I place an order for LM536003QDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM536003QDSXTQ1 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 LM536003QDSXTQ1 reliable?
The price and inventory of LM536003QDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM536003QDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM536003QDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM536003QDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM536003QDSXTQ1?
LM536003QDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM536003QDSXTQ1 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 LM536003QDSXTQ1?
For technical support, including LM536003QDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM536003QDSXTQ1 requirements.
6.How does Aetrix verify that LM536003QDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM536003QDSXTQ1 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 LM536003QDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM536003QDSXTQ1?
All LM536003QDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM536003QDSXTQ1, 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 LM536003QDSXTQ1 part is unused and in its original packaging.
Return procedure for LM536003QDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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