My Inquiry
My Account
Texas Instruments LM536003QDSXRQ1
- Part No.:
- LM536003QDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM536003QDSXRQ1.pdf
- Description:
- IC REG BUCK 3.3V 650MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,813
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM536003QDSXRQ1 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 - deployed in automotive camera modules requiring compact, robust, low-noise power conversion.
For engineers reviewing the LM536003QDSXRQ1 datasheet, LM536003QDSXRQ1 pinout, LM536003QDSXRQ1 application, or LM536003QDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and ESD specs, and real-world design implications for camera and ADAS power rails - no generic timing or interface assumptions.
Technical Context
The LM536003QDSXRQ1 implements peak current mode control with internal compensation, enabling stable regulation across wide input (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 achieves 3.3-V output regulation from as low as 3.8-V input via optimized high-side gate drive and low-RDS(on) MOSFETs (220 mΩ HS / 200 mΩ LS).
It integrates a filtered open-drain RESET output with ±1% threshold accuracy relative to 3.3-V output, 4–8-ms assertion delay, and 24-µs glitch filtering - eliminating external supervisory ICs. The SYNC/MODE pin enables forced PWM or AUTO mode with diode emulation, and supports external clock synchronization from 1.9–2.3 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over full load (0–650 mA) and temperature (–40°C to 125°C ambient), ensuring stable MCU/Sensor rail compliance. |
| Input Voltage Range | 3.55 V to 36 V continuous, with 42-V/100-ms transient tolerance - simplifies front-end surge protection in 12-V automotive systems. |
| Switching Frequency | 2.1 MHz ±10%, fixed and spread-spectrum capable - enables use of small 1-µH inductors and avoids AM-band interference. |
| Quiescent Current | 23 µA typical at no load - sustains battery-powered sleep modes in always-on camera systems without auxiliary LDOs. |
| Shutdown Current | 1.8 µA max at 25°C - meets stringent automotive off-state leakage requirements for ECU power domains. |
| Thermal Rating | Junction temperature range –40°C to 150°C, AEC-Q100 Grade 1 qualified (–40°C to 125°C ambient) - validated for under-hood deployment. |
| RESET Output | Open-drain with 105–110% rising / 92–97% falling thresholds vs. 3.3-V output, 4–8-ms delay - provides reliable system power-good signaling. |
Pinout & Package
LM536003QDSXRQ1 uses a 10-pin WSON (DSX) package, 3.0 mm × 3.0 mm, with wettable flanks and exposed thermal pad (DAP) tied to PCB ground plane for junction-to-board thermal resistance of 20.9°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects directly to inductor; carries high di/dt switching current - requires short, low-inductance layout to minimize EMI. |
| 2 BOOT | High-side gate driver supply | Requires 100-nF ceramic capacitor between BOOT and SW; internal diode charges it during low-SW phase. |
| 3 VCC | Internal 3-V regulator output | Supplies internal control circuitry; bypass with 1.0-µF capacitor to AGND - critical for startup stability. |
| 4 FB | Feedback input (fixed 3.3-V version) | Direct connection to output node; 10-nF capacitor adjacent to pin ensures loop stability and noise immunity. |
| 5 AGND | Analog ground reference | Ground reference for FB and internal error amplifier - must be star-connected to DAP and VIN bypass caps. |
| 6 RESET | Open-drain reset output | Pulled low on fault or EN=low; requires external pull-up resistor - provides system-level power-status indication. |
| 7 EN | Enable input | Active-high logic; 1.7–2.0 V threshold with 0.4–0.55 V hysteresis - supports direct connection to microcontroller GPIO. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; bypass with low-ESR capacitors placed adjacent to pin and GND - essential for transient immunity. |
| 9 SYNC/MODE | Mode selection & sync input | Tied low for AUTO mode (PFM at light load); tied high for forced PWM; accepts 1.9–2.3 MHz external clock - enables EMI shaping. |
| 10 GND | Power ground | Primary return path for high-current loops; connects to DAP - forms low-impedance thermal and electrical path. |
| DAP | Exposed thermal pad | Electrically connected to GND only; soldered to solid PCB ground plane - mandatory for thermal performance (RθJB = 20.9°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RESET with filtering | Eliminates external supervisor IC by providing glitch-filtered, temperature-compensated power-good signal referenced to 3.3-V output. |
| 2.1-MHz fixed-frequency operation | Enables use of miniature 1-µH inductors and reduces input/output capacitor size - cuts solution footprint by >30% vs. 500-kHz converters. |
| Low 23-µA quiescent current | Supports >1-year battery standby in always-on automotive cameras without supplemental LDOs or complex power sequencing. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM ±2000 V / CDM ±750 V ESD ratings - meets OEM requirements for body/camera ECUs. |
| Internal compensation | Reduces BOM count by removing external compensation network - simplifies design validation and improves production yield. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and MIPI PHY in rear-view or surround-view camera modules mounted in hot, vibration-prone locations. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator supplying digital core and interface logic with tight voltage accuracy (±2%) and fast transient response. Use Value: 2.1-MHz switching avoids AM-band noise coupling into analog video paths; 23-µA IQ extends parking-mode battery life. |
Use Scenario: Generates clean 3.3-V rail for SoC peripherals (CAN FD transceivers, Ethernet PHYs, flash memory) in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: High-reliability point-of-load converter with RESET output synchronized to system boot sequence. Use Value: Integrated RESET replaces discrete supervisor, saving 2 mm² PCB area; 42-V transient tolerance withstands load-dump events. |
| Automotive Body Control Module (BCM) | In-Cabin Occupancy Sensor System |
|
Use Scenario: Supplies 3.3-V logic for LIN gateway, LED drivers, and window/mirror control MCUs in door modules and center consoles. IC Role / Device Role / Timing Role: Compact, thermally efficient DC/DC converter operating across cold-crank (3.55 V) to load-dump (42 V) conditions. Use Value: Wettable flank WSON package enables automated optical inspection (AOI); 150°C junction rating supports sealed enclosure operation. |
Use Scenario: Powers time-of-flight (ToF) sensors and low-power microcontrollers in driver/passenger detection systems behind dashboards. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator maintaining sensor readiness during vehicle sleep states. Use Value: 1.8-µA shutdown current prevents parasitic drain; soft-start (1.3–4.5 ms) prevents inrush-induced brownouts on shared 12-V bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536013QDSXRQ1 | Same pinout and package; rated for 1-A load (vs. 650 mA), higher current limit (1.5–2.1 A), and identical 3.3-V fixed output. | Suitable where future-proofing for higher sensor loads or parallel camera channels is required; same thermal footprint but higher power dissipation at full load. | Select LM536013QDSXRQ1 if system peak current exceeds 650 mA or long-term reliability margin at 125°C ambient is critical. |
| TPS62813QWRVCRQ1 | 3.3-V fixed output, 1.2-A capability, 2.25-MHz switching, lower IQ (15 µA), but uses 12-pin VQFN (3.0 × 2.5 mm) with different pinout and no integrated RESET. | Requires external reset supervisor and re-layout; better efficiency at light loads due to DCS-Control topology, but adds BOM and validation effort. | Choose TPS62813QWRVCRQ1 only when ultra-low IQ dominates over board space and RESET integration - not a drop-in replacement. |
Compared with LM536003QDSXRQ1, LM536013QDSXRQ1 offers higher current headroom in identical packaging, while TPS62813QWRVCRQ1 trades RESET integration and pin compatibility for marginally lower quiescent current and different thermal characteristics - neither is pin-compatible without PCB revision.
Availability
LM536003QDSXRQ1 is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS domain controller core rails, and body control module applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LM536003QDSXRQ1 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 ICs, with decades of automotive qualification expertise and broad manufacturing scale.
The LM53600-Q1 product line delivers compact, high-frequency synchronous buck regulators optimized for automotive camera, ADAS, and body electronics - designed to replace multi-chip solutions with single-package, AEC-Q100-compliant power conversion.
FAQ
What is the maximum continuous output current supported by the LM536003QDSXRQ1?
The LM536003QDSXRQ1 supports a maximum continuous output current of 650 mA under recommended operating conditions (–40°C to 125°C ambient, proper PCB thermal design). This rating is validated per AEC-Q100 and accounts for internal current limits (0.65–0.93 A low-side, 1.0–1.65 A high-side) and thermal derating above 85°C ambient. Exceeding 650 mA risks thermal shutdown activation or reduced lifetime.
Does the LM536003QDSXRQ1 require external compensation components?
No, the LM536003QDSXRQ1 features fully internal compensation - no external RC network is needed for loop stability. This is confirmed in the datasheet's "Internal compensation" feature list and Section 8.3.7, which states the device is "designed for stable operation with minimal external components." Designers only need input/output capacitors, inductor, BOOT capacitor, and optional SYNC resistor.
How does the RESET output of the LM536003QDSXRQ1 behave during enable/disable transitions?
The RESET output of the LM536003QDSXRQ1 goes low when EN is pulled low (shutdown), and remains low for 4–8 ms after EN rises until output regulation is confirmed. It asserts high only after soft-start completes and output voltage reaches 105–110% of 3.3 V, with built-in 24-µs glitch filtering. This behavior is specified in Sections 7.5 and 7.7 of the LM53600-Q1 datasheet.
Can the LM536003QDSXRQ1 operate with an input voltage below 3.8 V?
Yes - the LM536003QDSXRQ1 can start and regulate from as low as 3.55 V after startup, per Section 7.6 (Vin_min). However, full functionality (including 650-mA load capability and 2.1-MHz switching) requires ≥3.8 V input. Below 3.8 V, the device may enter dropout or reduce switching frequency; operation down to 3.55 V is validated only for light loads and specific output configurations.
Is the LM536003QDSXRQ1 pin-compatible with other members of the LM53600-Q1 family?
Yes - all LM53600-Q1 variants (e.g., LM536005QDSXRQ1, LM53600AQDSXRQ1) share identical 10-pin WSON (DSX) package, pinout, and footprint. The LM536003QDSXRQ1 differs only in factory-trimmed feedback network for 3.3-V output; no PCB changes are needed when substituting within the LM53600-Q1 family for same-output-voltage variants.
LM536003QDSXRQ1 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)
LM536003QDSXRQ1 FAQ
1.How can I place an order for LM536003QDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM536003QDSXRQ1 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 LM536003QDSXRQ1 reliable?
The price and inventory of LM536003QDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM536003QDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM536003QDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM536003QDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM536003QDSXRQ1?
LM536003QDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM536003QDSXRQ1 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 LM536003QDSXRQ1?
For technical support, including LM536003QDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM536003QDSXRQ1 requirements.
6.How does Aetrix verify that LM536003QDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM536003QDSXRQ1 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 LM536003QDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM536003QDSXRQ1?
All LM536003QDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM536003QDSXRQ1, 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 LM536003QDSXRQ1 part is unused and in its original packaging.
Return procedure for LM536003QDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM536003QDSXRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
