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Texas Instruments LM536005QDSXRQ1
- Part No.:
- LM536005QDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM536005QDSXRQ1.pdf
- Description:
- IC REG BUCK 5V 650MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,828
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Product details
Overview
LM536005QDSXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering a fixed 5.0 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 LM536005QDSXRQ1 datasheet, LM536005QDSXRQ1 pinout, LM536005QDSXRQ1 application, or LM536005QDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and ESD specs, and real-world implementation constraints for body electronics and ADAS subsystems.
Technical Context
The LM536005QDSXRQ1 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 above the AM band. Its architecture supports seamless PWM/PFM transitions and diode emulation in AUTO mode via SYNC/MODE pin control.
It integrates a 3-V internal regulator (VCC), open-drain RESET with 4–8 ms delay and ±3% hysteresis, thermal shutdown at 151–185°C, and dual current limiting (HS: 1.0–1.65 A; LS: 0.65–0.93 A). The device uses a single-stage synchronous buck topology with integrated high- and low-side MOSFETs (RDS(on) = 220 mΩ / 200 mΩ).
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/Sensor bias without external feedback resistors. |
| Max Output Current | 650 mA continuous - matches typical power demand of automotive cameras and radar sensors. |
| Input Voltage Range | 3.55 V to 36 V (transient to 42 V/100 ms) - eliminates need for upstream surge protection in 12-V/24-V vehicle systems. |
| Quiescent Current | 23 µA at no load - enables always-on functionality in infotainment and ADAS modules without battery drain. |
| Switching Frequency | 2.1 MHz ±10% - allows use of compact 1–2.2 µH inductors and reduces EMI filtering requirements. |
| RESET Threshold Accuracy | 105–110% upper / 92–97% lower of VOUT - provides precise system power-good signaling without external supervisor IC. |
| Junction Temp Range | –40°C to 150°C - certified for under-hood and camera module mounting locations per AEC-Q100 Grade 1. |
Pinout & Package
LM536005QDSXRQ1 is housed in a 10-pin WSON (DSX) package, 3.0 mm × 3.0 mm, with wettable flanks and exposed thermal pad (DAP) requiring direct connection to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects to inductor; carries high di/dt switching current - requires short, low-inductance trace to minimize EMI. |
| 2 BOOT | High-side gate driver supply | Supplies floating voltage for HS FET gate drive; requires 100-nF ceramic capacitor between BOOT and SW. |
| 3 VCC | Internal 3-V regulator output | Power source for control circuitry; requires 1.0-µF bypass capacitor to AGND (fixed-output variant). |
| 4 FB | Feedback input (5-V fixed) | Direct connection to 5-V output; sets regulation point - no external divider needed for this variant. |
| 5 AGND | Analog ground reference | Ground reference for FB and internal analog circuits - must be star-connected near VCC capacitor. |
| 6 RESET | Open-drain power-good output | Active-low fault indicator with 4–8 ms delay; requires external pull-up resistor to system rail (e.g., 10 kΩ to 5 V). |
| 7 EN | Enable input | Logic-high (>1.7 V) enables regulation; logic-low (<0.4 V) disables with 1.8 µA shutdown current. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-µF ceramic input capacitor placed adjacent to pin. |
| 9 SYNC/MODE | Mode selection & sync input | Pull low for AUTO mode (PFM/PWM); pull high for forced PWM; accept 1.9–2.3 MHz external clock for synchronization. |
| 10 GND | Power ground | Primary return path for high-current loops; must be solidly connected to DAP and input/output capacitors. |
| DAP | Exposed thermal pad | Thermal interface only - electrically tied to GND; requires ≥80% solder coverage for RθJA = 46.2°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2000 V and CDM ±750 V ESD robustness - meets automotive reliability standards. |
| Integrated RESET with filter & delay | Eliminates external supervisory IC by providing glitch-filtered (24 µs), delayed (4–8 ms) power-good signal synchronized to output regulation. |
| Pin-selectable AUTO/FPWM modes | Enables light-load efficiency optimization (AUTO) or constant-frequency noise control (FPWM) without firmware or external logic. |
| Internal compensation & soft-start | Reduces BOM count by removing external compensation network; 1.3–4.5 ms soft-start prevents inrush current during power-up. |
| Wettable flank WSON package | Supports automated optical inspection (AOI) of solder joints on production lines - critical for zero-defect automotive manufacturing. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface circuitry in rear-view or surround-view camera modules mounted in exterior housings. IC Role / Device Role / Timing Role: Primary 5-V intermediate rail regulator converting 12-V battery to clean, low-noise 5-V supply with fast transient response. Use Value: 23 µA quiescent current enables always-on wake-on-motion functionality; 42-V transient tolerance withstands load-dump events without protection circuitry. |
Use Scenario: Supplies auxiliary 5-V rail to CAN transceivers, Ethernet PHYs, and microcontroller peripherals within centralized ADAS ECUs. IC Role / Device Role / Timing Role: Secondary regulated rail generator ensuring stable voltage during engine cranking (VIN dip to 3.55 V) and cold-cranking conditions. Use Value: Minimum 3.55-V startup enables uninterrupted operation during 12-V battery sag; 150°C junction rating supports placement near heat-generating SoCs. |
| Body Control Module (BCM) Subsystem | Automotive Infotainment Display Backlight |
|
Use Scenario: Delivers 5-V power to LIN transceivers, LED drivers, and sensor interfaces in door modules and seat controllers. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing discrete LDOs and linear regulators to reduce thermal load and board space. Use Value: 2.1-MHz switching allows use of 1.5-µH inductors <1.2 mm height - fits tight mechanical envelopes in slim door panels. |
Use Scenario: Provides regulated 5-V supply to display timing controller (TCON) and backlight driver ICs in digital instrument clusters. IC Role / Device Role / Timing Role: Noise-sensitive power rail generator where EMI must stay below CISPR-25 Class 5 limits in 150 kHz–1 GHz band. Use Value: Fixed 2.1-MHz frequency avoids AM band interference; spread spectrum option (not enabled in LM536005QDSXRQ1) available in pin-compatible variants for further EMI reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536015QDSXRQ1 | Same package and pinout; rated for 1-A max output current (vs. 650 mA); identical 5-V fixed output and 2.1-MHz frequency. | Required when load exceeds 650 mA (e.g., multi-sensor camera modules with ISP + MIPI + flash LED drivers). | Select LM536015QDSXRQ1 if future-proofing for higher current or consolidating BOM across 650-mA and 1-A designs. |
| TPS543320RTWR | 3.5-V to 18-V input; 3-A output; 2.2-MHz switching; requires external compensation; no integrated RESET; not AEC-Q100 qualified. | Suitable for non-automotive industrial or commercial 5-V rails where cost and size are prioritized over automotive qualification. | Choose TPS543320RTWR only for non-automotive applications - lacks AEC-Q100 Grade 1, RESET, and 42-V transient capability. |
Compared with LM536015QDSXRQ1, LM536005QDSXRQ1 offers lower cost and thermal margin for ≤650-mA loads; versus TPS543320RTWR, it provides automotive qualification, integrated supervision, and wider input range - essential for vehicle-level deployment.
Availability
LM536005QDSXRQ1 is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS domain controllers, and body control modules requiring stable component supply with full AEC-Q100 compliance and long-term lifecycle support.
Supply support for LM536005QDSXRQ1 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 IC design expertise and broad qualification infrastructure.
The LM53600-Q1 product line delivers compact, high-reliability DC/DC converters optimized for automotive power management in camera, sensor, and ECU subsystems - emphasizing low IQ, wide VIN, and integrated supervision.
FAQ
What is the maximum load current supported by the LM536005QDSXRQ1?
The LM536005QDSXRQ1 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 current needs, consider the pin-compatible LM536015QDSXRQ1 rated at 1 A.
Does the LM536005QDSXRQ1 require external compensation components?
No, the LM536005QDSXRQ1 features fully internal compensation, eliminating the need for external RC networks or type-II/type-III compensators. This simplifies layout, reduces BOM count, and ensures stable operation across all recommended input voltages (3.55 V to 36 V) and output capacitors (4.7 µF to 47 µF ceramic), as verified in TI's SNAS660D datasheet Section 8.3.7.
How does the RESET output function on the LM536005QDSXRQ1?
The LM536005QDSXRQ1 provides an open-drain RESET output with built-in glitch filtering (24 µs time constant) and programmable delay (4–8 ms after regulation is achieved). It asserts low when output voltage falls below 92–97% of nominal 5 V or when EN is deasserted. A pull-up resistor to a valid supply (e.g., 5 V) is required to generate a logic-high "power-good" signal - no external supervisor IC is needed.
Can the LM536005QDSXRQ1 operate during cold-cranking conditions?
Yes, the LM536005QDSXRQ1 starts up and regulates continuously down to 3.55 V input, making it suitable for automotive cold-cranking where battery voltage can dip to 3.2 V. Its input UVLO threshold is 3.2–3.75 V with 0.2–0.35 V hysteresis, and it maintains regulation at 500 mA load with as little as 3.55 V input - confirmed in Section 7.6 of the SNAS660D datasheet.
Is the LM536005QDSXRQ1 compatible with external clock synchronization?
Yes, the LM536005QDSXRQ1 supports external clock synchronization via the SYNC/MODE pin. When driven with a 1.9–2.3 MHz square wave (25–75% duty cycle), it locks its switching frequency to the external source and operates in forced PWM mode. Synchronization disables spread spectrum but enables EMI reduction through frequency alignment - detailed in Section 7.5 of the datasheet.
LM536005QDSXRQ1 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)
LM536005QDSXRQ1 FAQ
1.How can I place an order for LM536005QDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM536005QDSXRQ1 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 LM536005QDSXRQ1 reliable?
The price and inventory of LM536005QDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM536005QDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM536005QDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM536005QDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM536005QDSXRQ1?
LM536005QDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM536005QDSXRQ1 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 LM536005QDSXRQ1?
For technical support, including LM536005QDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM536005QDSXRQ1 requirements.
6.How does Aetrix verify that LM536005QDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM536005QDSXRQ1 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 LM536005QDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM536005QDSXRQ1?
All LM536005QDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM536005QDSXRQ1, 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 LM536005QDSXRQ1 part is unused and in its original packaging.
Return procedure for LM536005QDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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