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Texas Instruments LM53601AQDSXTQ1
- Part No.:
- LM53601AQDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601AQDSXTQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:8,804
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Product details
Overview
LM53601AQDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 1000 mA output current, operating from 3.55 V to 36 V input, with fixed 2.1-MHz switching frequency and 23 µA quiescent current - used in automotive camera power rails requiring compact, high-efficiency 3.3-V or 5-V regulation.
For engineers reviewing the LM53601AQDSXTQ1 datasheet, LM53601AQDSXTQ1 pinout, LM53601AQDSXTQ1 application, or LM53601AQDSXTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and ESD specs, and real-world implementation constraints for camera and ADAS subsystems.
Technical Context
The LM53601AQDSXTQ1 implements peak current mode control with internal compensation, enabling stable regulation across wide VIN (3.55–36 V) and VOUT (adjustable, 3.3 V, or 5 V) ranges without external loop components. Its 2.1-MHz fixed-frequency operation avoids AM-band interference and permits miniaturized inductors and ceramic capacitors.
It integrates a high-side MOSFET (220 mΩ RDS(on)) and low-side MOSFET (200 mΩ), supports forced PWM or AUTO mode via SYNC/MODE pin, and features a dedicated open-drain RESET output with 4–8 ms delay and ±3% hysteresis - eliminating need for external supervisory ICs in safety-critical automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA max - supports full-power operation of image sensors and SerDes interfaces in automotive cameras. |
| Input Voltage Range | 3.55 V to 36 V (transient tolerant to 42 V/100 ms) - accommodates cold-crank, load-dump, and wide-battery-range conditions. |
| Switching Frequency | 2.1 MHz fixed - enables use of ≤2.2-µH inductors and avoids AM radio band (0.53–1.71 MHz). |
| Quiescent Current | 23 µA - sustains always-on functionality in parking-mode camera systems without battery drain. |
| Junction Temperature Range | –40°C to 150°C - qualified for under-hood and cabin-mounted ADAS ECUs per AEC-Q100 Grade 1. |
| RESET Output | Open-drain with 4–8 ms delay and 92–97% / 105–110% VOUT thresholds - provides reliable power-good signaling without external RC timing. |
| Package | 10-pin WSON (3 mm × 3 mm) with wettable flanks - supports automated optical inspection (AOI) and robust solder-joint reliability in automotive reflow. |
Pinout & Package
LM53601AQDSXTQ1 uses a 10-pin WSON package (3.00 mm × 3.00 mm) with exposed thermal pad (DAP) tied to GND for enhanced heat dissipation. Wettable flanks enable solder fillet inspection per IPC-A-610.
| 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 | Requires 100-nF capacitor between SW and BOOT; critical for proper high-side FET turn-on. |
| 3 VCC | Internal 3-V regulator output | Supplies internal control circuitry; bypass with 1.0-µF capacitor to AGND (fixed) or GND (adjustable). |
| 4 FB | Feedback input (adjustable version) | Connects to resistor divider on output; sets VOUT with 1.0 V reference - enables 3.3–6 V adjustable range. |
| 5 BIAS | VCC bias source | Connected to output node; supplies VCC regulator - places feedback path outside main ground loop for stability. |
| 6 RESET | Open-drain reset output | Asserts low on fault or EN=low; requires external pull-up - replaces discrete supervisor IC in camera modules. |
| 7 EN | Enable input | Active-high logic; 1.7–2.0 V threshold with 0.4 V hysteresis - supports direct connection to MCU GPIO or ignition-sense rail. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; bypass directly to GND with low-ESR capacitor - critical for transient immunity and EMI suppression. |
| 9 SYNC/MODE | Mode selection & sync input | Tied high = forced PWM; tied low = AUTO with diode emulation; accepts 1.9–2.3 MHz external clock - enables system-level timing coordination. |
| 10 GND | Power ground | Primary return path for VIN, SW, and internal circuits - must be connected to solid ground plane under DAP. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | 220 mΩ / 200 mΩ RDS(on) - eliminates external power switches and reduces BOM count in space-constrained camera PCBs. |
| Internal compensation | No external compensation network required - simplifies design validation and improves production yield across temperature and load variations. |
| Spread spectrum option (via variant) | ±4% frequency modulation - reduces peak EMI by spreading energy across 1.9–2.3 MHz band, easing CISPR 25 Class 5 compliance. |
| Soft-start time | 1.3–4.5 ms - prevents inrush current during power-up of image sensor arrays and MIPI CSI-2 transceivers. |
| Thermal shutdown | 151–185°C rising threshold with 10°C hysteresis - protects against sustained overload in enclosed rear-view camera housings. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Core Rail |
|---|---|
Use Scenario: Powers 3.3-V MIPI CSI-2 image sensor and ISP in front/rear-view camera module exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 3.3-V rail with fast transient response to sensor burst modes. Use Value: 23 µA IQ enables parking-mode operation; 150°C junction rating ensures reliability at 85°C ambient + self-heating. |
Use Scenario: Supplies 5-V core logic for radar preprocessor SoC in 77-GHz ADAS domain controller with strict EMI limits. IC Role / Device Role / Timing Role: Fixed 5-V buck stage preceding LDOs; synchronized via SYNC/MODE pin to avoid beat frequencies with radar clocks. Use Value: 2.1-MHz switching avoids AM band; spread spectrum option (on M/N variants) reduces conducted emissions by >6 dBµV. |
| Automotive Body Control Module (BCM) | In-Cabin Driver Monitoring System |
Use Scenario: Generates 3.3-V rail for LIN gateway microcontroller and CAN transceiver in door module with cold-crank operation. IC Role / Device Role / Timing Role: Input-tolerant buck converter maintaining regulation down to 3.55 V during engine start. Use Value: 42-V transient tolerance eliminates need for external TVS; RESET output signals MCU on undervoltage events. |
Use Scenario: Powers IR LED driver and near-infrared image sensor in driver attention monitoring system mounted on dashboard. IC Role / Device Role / Timing Role: Adjustable-output buck supplying 4.2-V LED bias rail with precise current control via external sense resistor. Use Value: Adjustable FB reference (1.0 V ±1%) enables accurate LED current setting; 1000-mA capability supports multi-LED arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53600AQDSXTQ1 | 650-mA rated version; identical pinout, package, and feature set except lower current limit and higher Rdson. | Suitable for lower-power camera modules or auxiliary rails where <650 mA suffices. | Select when load current is ≤650 mA and cost sensitivity outweighs headroom requirements. |
| TPS543320RTWR | 3-A, 2.2-MHz buck with PMBus interface; larger 16-pin QFN; no integrated RESET; higher IQ (45 µA). | Used in high-performance ADAS ECUs requiring telemetry, dynamic voltage scaling, or multi-rail sequencing. | Choose when digital control, higher current, or telemetry is needed - not a drop-in replacement. |
Compared with LM53600AQDSXTQ1, the LM53601AQDSXTQ1 offers +53.8% output current headroom and lower conduction loss, while TPS543320RTWR trades simplicity and low IQ for programmability and scalability - making LM53601AQDSXTQ1 optimal for cost-sensitive, space-constrained automotive vision systems.
Availability
LM53601AQDSXTQ1 is available at Aetrix Electronics and suitable for automotive camera modules, ADAS domain controllers, and body electronics requiring stable component supply with AEC-Q100 qualification, 150°C junction rating, and wettable-flank packaging.
Supply support for LM53601AQDSXTQ1 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 signal chain solutions.
The LM53600/01-Q1 product line was designed specifically for automotive power conversion in camera, radar, and infotainment systems - emphasizing small size, ultra-low IQ, AEC-Q100 compliance, and robust transient handling.
FAQ
What is the maximum continuous output current supported by the LM53601AQDSXTQ1?
The LM53601AQDSXTQ1 supports a maximum continuous output current of 1000 mA under recommended operating conditions (TJ ≤ 150°C, proper PCB thermal design). This rating is validated across –40°C to 125°C ambient and accounts for internal MOSFET RDS(on), thermal resistance (RθJA = 46.2°C/W), and derating above 125°C junction temperature. Exceeding 1000 mA risks thermal shutdown activation.
Does the LM53601AQDSXTQ1 require external compensation components?
No, the LM53601AQDSXTQ1 features fully internal compensation - no external Type II or Type III compensation network is needed. Its peak current mode architecture with built-in error amplifier and compensation circuitry ensures stable operation across all valid input/output combinations and load conditions, reducing design complexity and board area versus traditional buck controllers.
How does the RESET output of the LM53601AQDSXTQ1 function during startup and fault conditions?
The LM53601AQDSXTQ1 RESET output is an open-drain signal that remains low until VOUT reaches 92–97% of its target (falling threshold), then releases high after a 4–8 ms filter delay. It asserts low again if VOUT drops below 92–97% or EN is pulled low. This behavior provides glitch-free power-good indication without external RC networks - a key advantage over discrete supervisor ICs.
Can the LM53601AQDSXTQ1 operate with an input voltage below 3.8 V?
Yes, the LM53601AQDSXTQ1 can start and regulate down to 3.55 V after startup (per Section 7.6), though minimum functional input is 3.8 V at full 1000-mA load. Below 3.8 V, output accuracy degrades and dropout behavior increases - verified in datasheet testing with VIN_MIN = 3.55 V at 500-mA load and VOUT = 3.3 V. Cold-crank compatibility is thus maintained without external boost assist.
What is the purpose of the BIAS pin on the LM53601AQDSXTQ1, and how must it be connected?
The BIAS pin on the LM53601AQDSXTQ1 supplies the internal VCC regulator and must be connected directly to the output voltage node (e.g., 3.3 V or 5 V rail). A 10-nF bypass capacitor is required adjacent to the pin. This configuration decouples VCC regulation from the main ground path, improving noise immunity and stability - especially critical for adjustable-output configurations where FB lacks a dedicated AGND terminal.
LM53601AQDSXTQ1 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.8V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 6V
- 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)
LM53601AQDSXTQ1 FAQ
1.How can I place an order for LM53601AQDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601AQDSXTQ1 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 LM53601AQDSXTQ1 reliable?
The price and inventory of LM53601AQDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601AQDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM53601AQDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601AQDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601AQDSXTQ1?
LM53601AQDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601AQDSXTQ1 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 LM53601AQDSXTQ1?
For technical support, including LM53601AQDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601AQDSXTQ1 requirements.
6.How does Aetrix verify that LM53601AQDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601AQDSXTQ1 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 LM53601AQDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM53601AQDSXTQ1?
All LM53601AQDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601AQDSXTQ1, 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 LM53601AQDSXTQ1 part is unused and in its original packaging.
Return procedure for LM53601AQDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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