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Texas Instruments LM536005QDSXTQ1
- Part No.:
- LM536005QDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM536005QDSXTQ1.pdf
- Description:
- IC REG BUCK 5V 650MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:13,039
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Product details
Overview
LM536005QDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering a fixed 5-V output at up to 650 mA, operating from 3.55 V to 36 V input with transient tolerance to 42 V, 2.1-MHz fixed switching frequency, and 23-µA quiescent current - deployed in automotive camera power rails.
For engineers reviewing the LM536005QDSXTQ1 datasheet, LM536005QDSXTQ1 pinout, LM536005QDSXTQ1 application, or LM536005QDSXTQ1 equivalent, key selection criteria include its 5-V fixed output, wettable-flank WSON-10 package, AEC-Q100 qualification, RESET output with delay filtering, and forced PWM/AUTO mode selectability via SYNC/MODE pin.
Technical Context
The LM536005QDSXTQ1 implements peak current-mode control with internal compensation, enabling stable regulation across wide VIN (3.55–36 V) and load (0–650 mA) ranges while maintaining 2.1-MHz fixed-frequency operation. Its architecture supports seamless PWM-to-PFM transitions and achieves regulation down to 3.8 V input for 5-V output.
It integrates a 3-V internal LDO (VCC), open-drain RESET with 4–8 ms delay and ±3% hysteresis, and a multifunction SYNC/MODE pin that enables external clock synchronization, forced PWM, or AUTO mode with diode emulation - all within a –40°C to 150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over full temperature and load range - ensures stable MCU/peripheral supply without external feedback resistors. |
| Max Output Current | 650 mA continuous - sufficient for image sensor, ISP, and interface ICs in automotive camera modules. |
| Input Voltage Range | 3.55 V to 36 V (transient to 42 V/100 ms) - accommodates cold-crank, load-dump, and 12-V/24-V vehicle architectures. |
| Switching Frequency | 2.1 MHz ±10% - places switching above AM band, minimizing EMI filter size and cost. |
| Quiescent Current | 23 µA typical - enables always-on functionality in low-power wake-up states without battery drain. |
| Shutdown Current | 1.8 µA at 25°C - supports deep-sleep modes compliant with automotive static current budgets. |
| RESET Output | Open-drain with 4–8 ms delay, 92–97% UVLO and 105–110% OVLO thresholds - provides reliable system power-good signaling without external supervisor. |
Pinout & Package
LM536005QDSXTQ1 uses a 10-pin WSON (DSX) package, 3.00 mm × 3.00 mm, with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects 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 floating bias for HS FET; requires 100-nF ceramic capacitor between BOOT and SW for proper bootstrap operation. |
| 3 VCC | Internal 3-V regulator output | Powers internal control circuitry; requires 1.0-μF bypass capacitor to AGND for stability and noise immunity. |
| 4 FB | Feedback input (fixed 5-V) | Direct connection to 5-V output; sets regulation point and supplies VCC bias - no external divider needed. |
| 5 AGND | Analog ground reference | Ground return for FB and internal analog circuits - must be connected to quiet ground plane, separate from power GND where possible. |
| 6 RESET | Open-drain reset output | Asserts low on fault or EN deactivation; requires external pull-up resistor - eliminates need for discrete supervisor IC. |
| 7 EN | Enable input | Active-high logic control; 1.7–2.0 V threshold with 0.4 V hysteresis - supports direct connection to microcontroller GPIO or ignition signal. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-μF ceramic input capacitor placed adjacent to pin for transient suppression. |
| 9 SYNC/MODE | Mode selection & sync input | Configures AUTO (light-load PFM), forced PWM, or external sync; tolerant to VIN-level voltages - enables flexible system timing control. |
| 10 GND | Power ground | Main return path for high-current loops; must be tied to thermal pad (DAP) and low-impedance ground plane. |
| DAP | Exposed thermal pad | Electrically isolated ground-connected thermal interface - mandatory solder connection to PCB ground plane for RθJA = 46.2°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM Class 2 and CDM Class C5 ESD robustness - meets automotive functional safety baseline requirements. |
| Integrated RESET with delay & hysteresis | Eliminates external supervisory IC by providing filtered, temperature-compensated power-good signal with programmable release timing. |
| Wettable-flank WSON-10 package | Enables automated optical inspection of solder joints on bottom-side terminations - critical for zero-defect automotive manufacturing yield. |
| 2.1-MHz fixed-frequency operation | Reduces required inductor size and input/output capacitance - supports compact 11.2 mm × 12.7 mm PCB layout per TI reference design. |
| Pin-selectable AUTO/forced PWM modes | Optimizes efficiency across load range: PFM at light loads (23 µA IQ), PWM at heavy loads - no firmware or external control needed. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers CMOS image sensor, ISP, and serializer in rear-view or surround-view camera modules exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Primary 5-V buck regulator supplying regulated power with fast transient response to handle burst-mode imaging loads. Use Value: 650-mA capability, 23-µA quiescent current, and –40°C to 150°C junction rating ensure reliable operation during cold-crank and hot-soak conditions. |
Use Scenario: Delivers clean 5-V rail to microcontroller cores, CAN transceivers, and Ethernet PHYs in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping down 12-V battery to 5-V, synchronized via SYNC/MODE to avoid beat frequencies with other system clocks. Use Value: 2.1-MHz switching and integrated soft-start (1.3–4.5 ms) prevent inrush current and enable deterministic power-up sequencing. |
| Automotive Body Control Module (BCM) | Infotainment Display Backlight Bias |
|
Use Scenario: Supplies auxiliary 5-V logic power to door module MCUs, LIN transceivers, and LED drivers in body electronics. IC Role / Device Role / Timing Role: Always-on regulator supporting low-power sleep modes with 1.8-µA shutdown current and wake-up via EN pin. Use Value: Wide 3.55–36-V input range handles load-dump transients up to 42 V/100 ms without external protection components. |
Use Scenario: Provides stable 5-V bias for display timing controllers and backlight LED drivers in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output DC/DC with RESET output used as power-good indicator for display initialization sequence. Use Value: RESET delay (4–8 ms) and hysteresis (±3% of VOUT) ensure glitch-free boot and robust brownout recovery during ignition cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536015QDSXTQ1 | Same package and pinout; rated for 1-A max output current instead of 650 mA - higher Rdson (220 mΩ HS, 200 mΩ LS) and slightly higher IQ (26 µA typical). | Supports higher-current peripherals (e.g., radar SoCs, multi-camera hubs); requires larger inductor and output cap due to higher peak currents. | Select when load exceeds 650 mA but 5-V fixed output and AEC-Q100 Grade 1 remain required. |
| TPS62231QDGSRQ1 | 3-MHz fixed-frequency 5-V buck (600 mA), smaller 2-mm × 2-mm WSON, but lacks RESET output, spread spectrum, and 42-V transient tolerance. | Suitable for space-constrained non-safety-critical body electronics; not recommended for camera or ADAS where RESET supervision and surge robustness are mandatory. | Choose only for cost- or size-sensitive secondary rails where full automotive surge immunity and power-good signaling are not required. |
Compared with LM536015QDSXTQ1 and TPS62231QDGSRQ1, LM536005QDSXTQ1 uniquely balances 650-mA capability, integrated RESET, 42-V transient tolerance, and wettable-flank packaging - making it optimal for mainstream automotive camera and BCM applications requiring production-grade reliability and testability.
Availability
LM536005QDSXTQ1 is available at Aetrix Electronics and suitable for automotive camera systems, ADAS domain controllers, and body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM536005QDSXTQ1 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 automotive power management and AEC-Q100-qualified solutions.
LM536005QDSXTQ1 belongs to TI's automotive-grade synchronous buck regulator product line, designed specifically for demanding power conversion in camera, ADAS, and body electronics - emphasizing high efficiency, small footprint, and robust qualification.
FAQ
What is the maximum output current supported by LM536005QDSXTQ1?
The LM536005QDSXTQ1 supports a maximum continuous output current of 650 mA. This rating is validated across the full AEC-Q100 Grade 1 ambient temperature range (–40°C to +125°C) and accounts for thermal derating at elevated junction temperatures. The device maintains regulation and specified electrical characteristics up to this load under typical PCB layout and thermal conditions with the DAP properly soldered to ground.
Does LM536005QDSXTQ1 require external feedback resistors for its 5-V output?
No, LM536005QDSXTQ1 is a fixed 5-V output variant and does not require external feedback resistors. The FB pin is internally connected to the 5-V reference and serves both as the regulation sense point and VCC bias source. External components needed are limited to input/output capacitors, inductor, BOOT capacitor, and optional RESET pull-up resistor - simplifying design and reducing BOM count.
How does the RESET output of LM536005QDSXTQ1 function during startup and fault conditions?
The LM536005QDSXTQ1 RESET output is an open-drain signal that remains low until the output reaches 92–97% of nominal 5 V, then releases high after a 4–8 ms delay. It asserts low again if output drops below threshold or EN is deactivated. This behavior provides a true power-good indication without external timing components - directly replacing discrete supervisors in automotive designs.
Can LM536005QDSXTQ1 synchronize to an external clock, and what are the requirements?
Yes, LM536005QDSXTQ1 can synchronize to an external clock via the SYNC/MODE pin. The valid sync frequency range is 1.9–2.3 MHz with 25–75% duty cycle and input high threshold of 1.5 V. When synchronized, the device operates in forced PWM mode at the external clock's rising edge and disables spread spectrum. This enables EMI reduction through frequency coordination in multi-rail automotive systems.
What is the purpose of the wettable flank feature in the WSON package of LM536005QDSXTQ1?
The wettable flanks on the LM536005QDSXTQ1's WSON-10 package expose solderable metal on the vertical side walls of each pin, enabling automated optical inspection (AOI) of solder joint quality after reflow. This feature is mandated for zero-defect automotive manufacturing, ensuring reliable interconnects in safety-critical applications such as camera and ADAS systems where field failure is unacceptable.
LM536005QDSXTQ1 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):
- 5V
- 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)
LM536005QDSXTQ1 FAQ
1.How can I place an order for LM536005QDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM536005QDSXTQ1 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 LM536005QDSXTQ1 reliable?
The price and inventory of LM536005QDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM536005QDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM536005QDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM536005QDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM536005QDSXTQ1?
LM536005QDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM536005QDSXTQ1 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 LM536005QDSXTQ1?
For technical support, including LM536005QDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM536005QDSXTQ1 requirements.
6.How does Aetrix verify that LM536005QDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM536005QDSXTQ1 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 LM536005QDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM536005QDSXTQ1?
All LM536005QDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM536005QDSXTQ1, 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 LM536005QDSXTQ1 part is unused and in its original packaging.
Return procedure for LM536005QDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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