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Texas Instruments LM53601MQDSXTQ1
- Part No.:
- LM53601MQDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601MQDSXTQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:424
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Product details
Overview
LM53601MQDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering up to 1000 mA output current, operating from 3.55 V to 36 V input with transient tolerance to 42 V, fixed 2.1-MHz switching frequency, and spread-spectrum capability for EMI reduction - deployed in ADAS camera power rails.
For engineers reviewing the LM53601MQDSXTQ1 datasheet, LM53601MQDSXTQ1 pinout, LM53601MQDSXTQ1 application, or LM53601MQDSXTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world implementation constraints including wettable-flank WSON-10 package layout requirements and RESET timing behavior under load transients.
Technical Context
The LM53601MQDSXTQ1 implements peak-current-mode control with internal compensation, enabling stable regulation across wide VIN–VOUT differentials (e.g., 3.8 V → 3.3 V) while maintaining 2.1 MHz fixed frequency operation. Its architecture supports seamless PWM/PFM transitions and diode-emulation mode at light loads via SYNC/MODE pin configuration.
It integrates a 3-V internal LDO (VCC), open-drain RESET with 4–8 ms delay and ±4% hysteresis, and dual current-limit protection (HS: 1.5–2.1 A, LS: 1.0–1.43 A). Thermal shutdown activates at 151–185°C with 10°C hysteresis, and junction temperature is rated from –40°C to 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA max - supports full-power operation of automotive image sensors and radar SoCs without external current boosting. |
| Input Voltage Range | 3.55 V to 36 V (transient to 42 V/100 ms) - eliminates need for upstream surge clamping in 12-V battery systems. |
| Switching Frequency | 2.1 MHz fixed - enables use of compact 1–2.2 µH inductors and avoids AM-band interference. |
| Quiescent Current | 23 µA typical - sustains always-on functionality in vehicle infotainment and domain controllers during sleep modes. |
| Shutdown Current | 1.8 µA - reduces parasitic drain on automotive batteries during extended parking periods. |
| Output Options | Adjustable (3.3–6 V) with 1% FB accuracy - allows single BOM to support multiple voltage rails via resistor divider. |
| Package | 10-pin WSON (3 mm × 3 mm) with wettable flanks - enables automated optical inspection (AOI) and reliable solder joint formation in automotive reflow profiles. |
Pinout & Package
LM53601MQDSXTQ1 uses a 10-pin WSON package (3.00 mm × 3.00 mm) with exposed thermal pad (DAP), designed for high-reliability automotive PCB assembly using wettable flank technology for solder fillet inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects directly to inductor; carries high di/dt switching current - requires short, low-inductance trace routing. |
| 2 BOOT | High-side gate driver supply | Requires 100-nF ceramic capacitor between BOOT and SW to sustain gate drive during HS conduction. |
| 3 VCC | Internal 3-V regulator output | Powers internal logic; requires 1.0-µF bypass capacitor to AGND (fixed) or GND (adjustable) per version. |
| 4 FB | Feedback input (adjustable mode) | Accepts voltage divider from output; reference voltage = 0.993–1.007 V - sets output with ±1% accuracy. |
| 5 BIAS | VCC bias source (adjustable mode) | Connected to output rail; supplies VCC regulator - must be decoupled with 10-nF capacitor adjacent to pin. |
| 6 RESET | Open-drain system status indicator | Asserts low when EN=0 or output fault occurs; requires external pull-up; 4–8 ms delay prevents false resets during startup. |
| 7 EN | Enable control input | Logic-high (>1.7 V) enables regulation; hysteresis = 0.4–0.55 V - supports direct connection to microcontroller GPIO. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-µF ceramic input capacitor placed adjacent to pin and GND. |
| 9 SYNC/MODE | Frequency sync & operating mode select | Tied high → forced PWM; tied low → AUTO mode with diode emulation; driven externally → synchronizes to 1.9–2.3 MHz clock. |
| 10 GND | Power ground | Primary return path for VIN, SW, and internal circuits - must connect directly to solid ground plane under DAP. |
| DAP | Exposed thermal pad | Electrically connected to GND only; sole purpose is thermal conduction - requires ≥6 thermal vias to inner ground layers. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±4% frequency dithering at 30 Hz - reduces peak EMI by >10 dB in CISPR 25 Class 5 conducted emissions tests. |
| Integrated RESET with filtering | Programmable 4–8 ms delay and 24-µs glitch filter - replaces discrete supervisor IC, saving 2.5 mm² board area and BOM cost. |
| Pin-selectable PWM/PFM operation | SYNC/MODE pin configures forced PWM (noise-sensitive systems) or AUTO mode (efficiency-critical standby states). |
| Wide-input, low-dropout capability | Regulates 3.3 V output from as low as 3.8 V input - supports cold-crank operation down to 6 V battery without dropout. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient (150°C junction) - meets automotive power supply reliability requirements for front-end camera modules. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers 5-MP CMOS image sensor and ISP in rear-view or surround-view camera module. IC Role / Device Role / Timing Role: Primary 3.3-V or adjustable 1.8-V/1.2-V buck regulator supplying sensor analog and digital domains with tight ripple control. Use Value: 23-µA quiescent current enables always-on wake-on-motion functionality; 2.1-MHz switching avoids interference with image sensor pixel clock harmonics. |
Use Scenario: Generates 1.0-V core voltage for automotive SoC (e.g., TI TDA4VM) in centralized ADAS domain controller. IC Role / Device Role / Timing Role: Secondary regulated rail downstream of primary 5-V supply; provides fast transient response to CPU load steps. Use Value: Internal compensation and 1000-mA capability eliminate need for external loop compensation components; soft-start time (1.3–4.5 ms) prevents inrush-induced brownout. |
| Automotive Body Control Module (BCM) | In-Cabin Driver Monitoring System |
|
Use Scenario: Supplies 5-V rail to LIN transceivers, LED drivers, and microcontroller peripherals in door module or seat control unit. IC Role / Device Role / Timing Role: High-efficiency step-down converter replacing discrete LDO + switching combo; handles load dumps up to 42 V. Use Value: 42-V transient rating and integrated UVLO (3.2–3.75 V) ensure uninterrupted operation during alternator load dump events per ISO 7637-2 Pulse 5a. |
Use Scenario: Powers near-infrared (NIR) illumination LEDs and time-of-flight sensor in driver attention monitoring system. IC Role / Device Role / Timing Role: Adjustable-output buck supplying precise 3.3-V or 5-V to LED driver IC and sensor interface. Use Value: Spread-spectrum mode suppresses EMI coupling into sensitive analog sensor paths; RESET output validates power integrity before sensor initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53600MQDSXTQ1 | 650-mA output limit, identical pinout and feature set except lower current capability and no spread-spectrum option in some variants. | Suitable for lower-power camera modules or sensors requiring ≤650 mA; not recommended for 1-A SoC core rails. | Select LM53600MQDSXTQ1 only when load current stays below 650 mA and spread-spectrum is not required. |
| TPS543320RTWR | 3-A output, 2.2-MHz switching, but requires external compensation and lacks AEC-Q100 Grade 1 qualification. | Used in non-automotive industrial or telecom power supplies where higher current and flexibility outweigh qualification needs. | Choose TPS543320RTWR only for non-automotive designs needing >1-A output; LM53601MQDSXTQ1 remains preferred for qualified automotive deployment. |
Compared with LM53600MQDSXTQ1, the LM53601MQDSXTQ1 delivers 54% higher output current and includes spread-spectrum EMI reduction; versus TPS543320RTWR, it trades off current headroom for guaranteed AEC-Q100 compliance and zero-external-compensation simplicity in space-constrained automotive modules.
Availability
LM53601MQDSXTQ1 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 documentation and traceable lot history.
Supply support for LM53601MQDSXTQ1 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 solutions, with over 50 years of innovation in high-reliability electronics.
The LM53601MQDSXTQ1 belongs to TI's automotive-qualified DC/DC buck regulator product line, engineered specifically for demanding power conversion tasks in ADAS, infotainment, and body electronics where AEC-Q100 compliance, low IQ, and EMI robustness are mandatory.
FAQ
What is the maximum continuous output current supported by the LM53601MQDSXTQ1?
The LM53601MQDSXTQ1 supports a maximum continuous output current of 1000 mA under recommended operating conditions (TJ ≤ 150°C, proper PCB thermal design). This rating applies across the full input range (3.55 V to 36 V) and output configurations (adjustable, 3.3 V, or 5 V), provided the thermal resistance to board (RθJB = 20.9°C/W) is maintained via adequate copper area and thermal vias under the DAP.
Does the LM53601MQDSXTQ1 require external compensation components?
No, the LM53601MQDSXTQ1 features fully internal compensation - no external RC network is needed for loop stability. This simplifies layout, reduces BOM count, and ensures consistent performance across temperature and manufacturing variance. The device achieves stable operation with standard 1–2.2 µH inductors and ceramic output capacitors, as validated in TI's SNAS660D reference design.
How does the RESET output function on the LM53601MQDSXTQ1?
The LM53601MQDSXTQ1 provides an open-drain RESET output that asserts low during startup until output reaches 92–97% of target voltage, then releases high after a 4–8 ms delay. It also pulls low during EN deactivation, overtemperature (≥151°C), or output fault. A 50–120 Ω internal pull-down ensures clean release; external pull-up is required to system rail (e.g., 3.3 V or 5 V) with current limiting.
Is the LM53601MQDSXTQ1 compatible with both wettable and non-wettable flank WSON packages?
The LM53601MQDSXTQ1 is specified and shipped exclusively in the wettable flank (WF) variant of the 10-pin WSON package, as confirmed in TI's orderable addendum and device comparison table. Non-wettable flank versions exist for other part numbers (e.g., LM53601MQUDSXRQ1), but LM53601MQDSXTQ1 is not offered in non-WF configuration - AOI-compatible solder fillets are guaranteed.
What is the minimum input voltage required for the LM53601MQDSXTQ1 to regulate a 3.3-V output at full load?
The LM53601MQDSXTQ1 requires a minimum input voltage of 3.8 V to maintain 3.3-V output regulation at 100% rated load (1000 mA), as specified in Section 7.3 Recommended Operating Conditions. At lighter loads (e.g., 100 µA–100 mA), it can regulate from as low as 3.55 V in AUTO mode - critical for cold-crank scenarios where battery voltage dips below 6 V.
LM53601MQDSXTQ1 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)
LM53601MQDSXTQ1 FAQ
1.How can I place an order for LM53601MQDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601MQDSXTQ1 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 LM53601MQDSXTQ1 reliable?
The price and inventory of LM53601MQDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601MQDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM53601MQDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601MQDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601MQDSXTQ1?
LM53601MQDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601MQDSXTQ1 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 LM53601MQDSXTQ1?
For technical support, including LM53601MQDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601MQDSXTQ1 requirements.
6.How does Aetrix verify that LM53601MQDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601MQDSXTQ1 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 LM53601MQDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM53601MQDSXTQ1?
All LM53601MQDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601MQDSXTQ1, 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 LM53601MQDSXTQ1 part is unused and in its original packaging.
Return procedure for LM53601MQDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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