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Texas Instruments LM53601LQDSXRQ1
- Part No.:
- LM53601LQDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601LQDSXRQ1.pdf
- Description:
- IC REG BUCK 5V 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,417
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Product details
Overview
LM53601LQDSXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering up to 1000 mA at 5 V output, operating from 3.55 V to 36 V input with transient tolerance to 42 V, fixed 2.1-MHz switching frequency, and spread-spectrum EMI reduction - deployed in ADAS camera power rails.
For engineers reviewing the LM53601LQDSXRQ1 datasheet, LM53601LQDSXRQ1 pinout, LM53601LQDSXRQ1 application, or LM53601LQDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world alternative selection guidance for safety-critical 12-V vehicle systems.
Technical Context
The LM53601LQDSXRQ1 implements peak current mode control with internal compensation, enabling stable regulation across wide VIN (3.55–36 V) and load (0–1000 mA) ranges while maintaining fixed 2.1-MHz operation. Its architecture supports seamless PWM/PFM transitions and achieves 3.3-V output from as low as 3.8-V input via optimized low-dropout design.
It integrates a 3-V internal regulator (VCC), open-drain RESET with 4–8 ms delay and ±3% hysteresis, pin-selectable forced PWM or AUTO mode via SYNC/MODE, and thermal shutdown at 151–185°C with 10°C hysteresis - all qualified for –40°C to 150°C junction operation per AEC-Q100.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA max - supports full-power operation of automotive camera modules and radar sensors without external current boosting. |
| Input Voltage Range | 3.55 V to 36 V (transient to 42 V/100 ms) - eliminates need for upstream surge protection in 12-V battery systems with cold-crank and load-dump events. |
| Switching Frequency | 2.1 MHz fixed - enables use of compact 1-µH inductors and avoids AM-band interference in cabin-mounted electronics. |
| Quiescent Current | 23 µA typical - sustains always-on functionality in parking-mode ADAS systems without draining battery. |
| Shutdown Current | 1.8 µA - meets automotive low-power sleep-state requirements for ECU-level power gating. |
| Output Voltage | 5.0 V fixed - factory-trimmed to ±1.5% accuracy over temperature, eliminating external feedback resistor network. |
| Spread Spectrum | Enabled - reduces peak EMI by ±4% frequency dithering, easing CISPR-25 Class 5 compliance in EMC-sensitive zones. |
| Junction Temp Range | –40°C to 150°C - ensures reliable operation under hood-mounted placement near engine compartments. |
Pinout & Package
LM53601LQDSXRQ1 uses 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 directly to inductor; carries high di/dt switching current - requires short, low-inductance layout to minimize EMI and voltage spikes. |
| 2 BOOT | High-side gate driver supply | Supplies gate drive for upper MOSFET; requires 100-nF ceramic capacitor between BOOT and SW to sustain charge during high-side conduction. |
| 3 VCC | Internal 3-V regulator output | Power source for control circuitry; must be decoupled with 1.0-µF capacitor to AGND (fixed version) - critical for startup stability. |
| 4 FB | Feedback input | Fixed 5-V output sensing node; connects directly to output rail - bypassed with 10-nF capacitor adjacent to pin to suppress noise coupling. |
| 5 AGND | Analog ground reference | Ground return for FB and internal analog circuits; must be routed separately from power ground to avoid noise injection into regulation loop. |
| 6 RESET | Open-drain reset output | Asserts low on fault or EN deactivation; requires external pull-up; provides filtered, delayed release (4–8 ms) for clean system boot sequencing. |
| 7 EN | Enable input | Active-high logic control; threshold 1.7–2.0 V with 0.4–0.55 V hysteresis - allows direct connection to microcontroller GPIO or battery monitor signal. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-µF ceramic input capacitor placed adjacent to pin to suppress ripple and transients. |
| 9 SYNC/MODE | Mode selection & sync input | Configures AUTO (light-load PFM) or forced PWM; accepts external 1.9–2.3 MHz clock for synchronization - disables spread spectrum when active. |
| 10 GND | Power ground | Primary ground return for power switches; must be connected to low-impedance ground plane - ties to DAP for thermal conduction. |
| DAP | Exposed thermal pad | Thermal interface only - electrically isolated from internal circuitry; must be soldered to solid copper 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 ±2000 V and CDM ±750 V ESD robustness - meets automotive functional safety baseline requirements. |
| Integrated RESET with delay & filtering | Eliminates external supervisor IC; provides glitch-immune system reset with 24-µs filter and 4–8 ms release delay - ensures reliable MCU boot after power stabilization. |
| Pin-selectable PWM/PFM mode | SYNC/MODE pin toggles between high-efficiency light-load PFM (AUTO) and constant-frequency forced PWM - enables dynamic trade-off between efficiency and EMI in variable-load applications. |
| Internal compensation & soft-start | Reduces BOM count by removing external compensation network; 1.3–4.5 ms programmable soft-start prevents inrush current and output overshoot during power-up. |
| Low dropout capability | Regulates 5-V output from input as low as 5.5 V (VDROP1 = 0.6 V) - supports operation during cold-crank (6.5 V battery) without brownout in camera ECU subsystems. |
| Wettable flank package | Enables automated optical inspection (AOI) of solder joints on 3-mm × 3-mm WSON - improves manufacturing yield and field reliability in automotive SMT lines. |
Applications
| Automotive Camera Power Supply | ADAS Radar Sensor Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface circuitry in rear-view or surround-view cameras mounted externally on vehicle body. IC Role / Device Role / Timing Role: Primary 5-V buck regulator providing stable, low-noise power with fast transient response to handle burst-mode imaging loads. Use Value: Spread spectrum and 2.1-MHz operation reduce conducted EMI into video signal path; 1000-mA rating supports dual-sensor configurations without derating. |
Use Scenario: Supplies 5-V power to millimeter-wave radar transceivers in front-end collision avoidance modules. IC Role / Device Role / Timing Role: High-reliability DC/DC converter with RESET monitoring and thermal shutdown - ensures fail-safe power delivery during extended highway operation. Use Value: 150°C junction rating and AEC-Q100 qualification enable under-hood placement; low IQ extends standby time during vehicle sleep modes. |
| Body Control Module (BCM) Subsystem | Infotainment Display Backlight Driver |
|
Use Scenario: Generates 5-V rail for LIN gateway, door module controllers, and LED lighting drivers within distributed body electronics. IC Role / Device Role / Timing Role: Compact, high-efficiency step-down regulator replacing discrete LDO + buck combinations in space-constrained junction boxes. Use Value: 3-mm × 3-mm WSON package saves >40% board area vs. legacy solutions; wettable flanks support AOI for zero-defect automotive assembly. |
Use Scenario: Powers LED backlight driver ICs in digital instrument clusters and center-stack displays requiring clean, regulated 5-V supply. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with tight output accuracy (±1.5%) - prevents visible flicker or brightness variation in TFT backlights. Use Value: Internal compensation and soft-start eliminate output overshoot during display wake-up; RESET output synchronizes backlight enable with MCU readiness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536015QDSXRQ1 | Same 5-V fixed output, same 1000-mA rating, but no spread-spectrum feature. | Lacks EMI reduction - suitable where board-level filtering suffices and cost optimization is prioritized over CISPR-25 margin. | Select when EMI testing passes without spread spectrum and BOM cost reduction is critical. |
| TPS62130AQRTJRQ1 | 1-A, 3–17-V input, 2.25-MHz fixed frequency, but no integrated RESET output or AEC-Q100 Grade 1 thermal rating (only Grade 2). | Rated for –40°C to 105°C ambient - insufficient for under-hood placement; requires external reset supervisor. | Choose only for cabin-mounted infotainment subsystems where ambient temperature stays below 105°C and RESET is handled elsewhere. |
Compared with LM536015QDSXRQ1 and TPS62130AQRTJRQ1, the LM53601LQDSXRQ1 uniquely combines 150°C junction operation, integrated RESET with delay, and spread-spectrum EMI control - making it the sole option qualified for thermally demanding, safety-critical ADAS camera power rails.
Availability
LM53601LQDSXRQ1 is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS radar sensor rails, and body control module subsystems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for LM53601LQDSXRQ1 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 deep expertise in automotive power management and functional safety-compliant design.
The LM53601-Q1 product line delivers high-efficiency, small-footprint DC/DC converters engineered specifically for automotive ADAS, body electronics, and infotainment systems operating in harsh thermal and EMI environments.
FAQ
What is the maximum continuous output current supported by the LM53601LQDSXRQ1?
The LM53601LQDSXRQ1 supports a maximum continuous output current of 1000 mA at 5 V output under recommended operating conditions (TJ ≤ 150°C, proper PCB thermal design). This rating is validated per AEC-Q100 and applies across the full –40°C to 150°C junction temperature range when using the specified 3-mm × 3-mm WSON package with DAP grounded to a thermal plane.
Does the LM53601LQDSXRQ1 include an integrated power-good or reset function?
Yes, the LM53601LQDSXRQ1 features an open-drain RESET output with built-in glitch filtering (24 µs) and programmable delay (4–8 ms). It asserts low during startup until output reaches 92–97% of nominal 5 V, then releases high after delay - providing a true power-good signal that eliminates the need for an external supervisory IC in automotive ECUs.
Can the LM53601LQDSXRQ1 operate with input voltages below 4 V?
Yes, the LM53601LQDSXRQ1 supports minimum input voltage of 3.55 V after startup for full functionality at 500-mA load, and 5.5 V for 100% rated 1000-mA load. Its low dropout architecture enables regulation of 5-V output from inputs as low as 5.5 V (VDROP1 = 0.6 V), making it suitable for cold-crank scenarios in 12-V automotive systems.
How does spread spectrum operation affect EMI performance of the LM53601LQDSXRQ1?
The LM53601LQDSXRQ1's spread spectrum feature dithers the 2.1-MHz switching frequency by ±4% at 30 Hz, spreading energy across a wider bandwidth and reducing peak radiated emissions. This lowers measured EMI by up to 10 dB in the 30–108 MHz band - easing CISPR-25 Class 5 compliance without adding ferrite beads or shielding cans.
Is the LM53601LQDSXRQ1 pin-compatible with other devices in the LM5360x-Q1 family?
Yes, all LM53600-Q1 and LM53601-Q1 variants share identical 10-pin WSON (DSX) package, pinout, and footprint. The LM53601LQDSXRQ1 is pin-compatible with LM536015QDSXRQ1 (5-V, no spread spectrum) and LM536013QDSXRQ1 (3.3-V, spread spectrum), enabling drop-in replacement for output voltage or EMI tuning without PCB redesign.
LM53601LQDSXRQ1 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:
- 1A
- 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)
LM53601LQDSXRQ1 FAQ
1.How can I place an order for LM53601LQDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601LQDSXRQ1 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 LM53601LQDSXRQ1 reliable?
The price and inventory of LM53601LQDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601LQDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM53601LQDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601LQDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601LQDSXRQ1?
LM53601LQDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601LQDSXRQ1 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 LM53601LQDSXRQ1?
For technical support, including LM53601LQDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601LQDSXRQ1 requirements.
6.How does Aetrix verify that LM53601LQDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601LQDSXRQ1 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 LM53601LQDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM53601LQDSXRQ1?
All LM53601LQDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601LQDSXRQ1, 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 LM53601LQDSXRQ1 part is unused and in its original packaging.
Return procedure for LM53601LQDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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