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Texas Instruments LM53601LQDSXTQ1
- Part No.:
- LM53601LQDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601LQDSXTQ1.pdf
- Description:
- IC REG BUCK 5V 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:737
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Product details
Overview
LM53601LQDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down 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 - used in ADAS camera power rails.
For engineers reviewing the LM53601LQDSXTQ1 datasheet, LM53601LQDSXTQ1 pinout, LM53601LQDSXTQ1 application, or LM53601LQDSXTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world implementation constraints for camera and driver-assistance systems.
Technical Context
The LM53601LQDSXTQ1 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 2.1-MHz fixed-frequency operation. Its architecture supports seamless PWM/PFM transitions and diode emulation in AUTO mode.
It integrates a 3-V internal LDO (VCC), open-drain RESET with 4–8 ms delay and ±4% hysteresis, SYNC/MODE pin for external clock synchronization or forced PWM/AUTO selection, and thermal shutdown at 151–185°C with 10°C hysteresis - all qualified per AEC-Q100 with junction temperature range –40°C to 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA maximum continuous load - supports full-power operation of automotive cameras and radar sensors. |
| Input Voltage Range | 3.55 V to 36 V (transient-rated to 42 V for ≤100 ms) - eliminates need for external surge protection in 12-V/24-V vehicle systems. |
| Switching Frequency | 2.1 MHz nominal (±10%) - enables use of compact 1–2.2 µH inductors and avoids AM-band interference. |
| Quiescent Current | 23 µA typical - sustains low-power sleep modes without auxiliary LDOs in always-on ADAS modules. |
| Shutdown Current | 1.8 µA at 25°C - meets automotive battery drain requirements for extended key-off periods. |
| Output Voltage | Fixed 5.0 V ±1.5% over temperature and line - ensures stable USB-peripheral or image sensor biasing. |
| Spread Spectrum | Enabled (L-suffix variant) - reduces peak EMI by ±4% frequency dithering, easing CISPR-25 Class 5 compliance. |
| Junction Temperature | –40°C to 150°C - supports under-hood deployment without derating in engine compartment proximity. |
Pinout & Package
LM53601LQDSXTQ1 uses a 10-pin WSON (DSX) package, 3.00 mm × 3.00 mm body size, 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 tight layout to minimize EMI and voltage spikes. |
| 2 BOOT | High-side gate driver supply | Requires 100-nF ceramic capacitor between BOOT and SW - critical for MOSFET turn-on reliability. |
| 3 VCC | Internal 3-V regulator output | Powers internal logic; requires 1.0-µF bypass to AGND - stabilizes control circuitry during transients. |
| 4 FB | Feedback input (fixed 5-V version) | Direct connection to output; sets regulation point - no external divider needed for 5-V operation. |
| 5 AGND | Analog ground reference | Ground reference for FB and internal error amplifier - must be star-connected near FB/VCC decoupling. |
| 6 RESET | Open-drain system 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; 1.7–2.0 V threshold with 0.4 V hysteresis - supports direct microcontroller GPIO control. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-µF ceramic + bulk capacitance - primary path for input surge energy. |
| 9 SYNC/MODE | Frequency sync & operating mode select | Tied high = forced PWM; tied low = AUTO with diode emulation; driven = external sync - enables EMI coordination in multi-rail systems. |
| 10 GND | Power ground | Low-impedance return for VIN and SW paths - must be solidly connected to DAP and AGND via multiple vias. |
| DAP | Exposed thermal pad | Thermal-only connection to PCB ground plane - no electrical function; mandatory for 150°C junction operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM Class 2 and CDM Class C5 ESD robustness - meets automotive functional safety baseline. |
| Integrated RESET with delay & filtering | 4–8 ms assertion delay and 24 µs glitch filter - provides clean, noise-immune power-good signal without external RC networks. |
| Pin-selectable forced PWM / AUTO mode | SYNC/MODE pin configures light-load behavior: forced PWM for constant frequency, AUTO for diode emulation - optimizes efficiency vs. EMI trade-off. |
| Internal compensation & soft-start | No external compensation components required; 1.3–4.5 ms programmable soft-start - simplifies design and prevents inrush current damage. |
| Wettable flank WSON package | Enables automated optical inspection (AOI) of solder joints - improves manufacturing yield and field reliability in automotive production. |
| Thermal shutdown with hysteresis | 151–185°C trip range with 10°C hysteresis - protects against sustained overload or poor heatsinking without oscillation. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Rail |
|---|---|
Use Scenario: Powers CMOS image sensor and ISP in rear-view or surround-view camera modules mounted in exterior housings. IC Role / Device Role / Timing Role: Primary 5-V buck regulator supplying sensor bias, digital core, and interface logic - operates continuously in parking mode. Use Value: 23 µA quiescent current extends battery life during 14-day key-off; 42-V transient tolerance survives load-dump events without protection diodes. |
Use Scenario: Generates clean 5-V rail for Ethernet switch, CAN transceivers, and microcontroller peripherals in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: Secondary regulated supply synchronized via SYNC/MODE pin to avoid beat frequencies with main SoC clock domains. Use Value: Spread-spectrum operation (enabled in L-suffix) reduces 2.1-MHz harmonics by >10 dBµV, easing CISPR-25 radiated emissions certification. |
| Automotive Body Control Module | In-Cabin Driver Monitoring System |
Use Scenario: Supplies 5-V power to LIN transceivers, LED drivers, and environmental sensors in door modules and seat controllers. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in AUTO mode during low-current standby states - transitions seamlessly to PWM under load. Use Value: Seamless PWM/PFM transition maintains >85% efficiency from 1 mA to 1 A load - eliminates audible coil whine and improves thermal margin. |
Use Scenario: Powers IR illuminator LEDs and time-of-flight sensor in driver attention monitoring systems embedded in rearview mirrors. IC Role / Device Role / Timing Role: Regulator with integrated RESET output used as power-good indicator for sensor initialization sequence and fault reporting. Use Value: Open-drain RESET with built-in delay and filtering replaces discrete supervisor IC - saves 2.5 mm² board area and reduces BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536015QDSXTQ1 | Same 5-V fixed output, but without spread spectrum - higher peak EMI at 2.1 MHz. | Suitable where EMI is managed externally or test limits are less stringent. | Select when cost sensitivity outweighs EMI performance requirements in non-critical zones. |
| TPS62130AQRTJRQ1 | 3-V to 17-V input, 3-A output, 2.25-MHz switching - wider VIN not needed; higher current capability unused. | Over-specified for 1-A 5-V camera rails; larger package (3.5×3.5 mm) increases layout footprint. | Choose only if future scalability to higher loads or multi-rail sharing is required. |
Compared with LM536015QDSXTQ1, LM53601LQDSXTQ1 adds spread-spectrum EMI reduction without changing pinout or layout; versus TPS62130AQRTJRQ1, it offers tighter automotive qualification (Grade 1 vs Grade 0), smaller footprint, and lower IQ - making it optimal for space- and emission-constrained camera modules.
Availability
LM53601LQDSXTQ1 is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS domain controllers, and body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM53601LQDSXTQ1 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-grade power management solutions.
LM53601LQDSXTQ1 belongs to TI's automotive-qualified DC/DC buck regulator family, designed specifically for demanding automotive environments including camera, radar, and domain controller power rails where reliability, EMI control, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum output current supported by LM53601LQDSXTQ1?
The LM53601LQDSXTQ1 supports a maximum continuous output current of 1000 mA at 5 V output. This rating is valid across the full AEC-Q100 Grade 1 ambient temperature range (–40°C to 125°C) and junction temperature range up to 150°C, provided thermal design meets RθJA ≤ 46.2°C/W and DAP is properly connected to a ground plane. Derating applies above 125°C junction temperature.
Does LM53601LQDSXTQ1 require external compensation components?
No, LM53601LQDSXTQ1 features fully internal compensation - no external compensation network is required. The device uses peak current mode control with factory-trimmed error amplifier and compensation network, enabling stable operation with minimal external components: only input/output capacitors, inductor, BOOT capacitor, and optional SYNC resistor.
How does the RESET output of LM53601LQDSXTQ1 behave during startup and fault conditions?
The LM53601LQDSXTQ1 RESET output is an open-drain signal that remains low until the output reaches 92–97% of nominal 5 V and remains stable for 4–8 ms. It asserts low again if output drops below threshold, EN is pulled low, or thermal shutdown activates. An external pull-up resistor (typically 10–100 kΩ) is required to generate a logic-high signal for microcontroller reset sequencing.
Can LM53601LQDSXTQ1 operate with input voltage below 3.8 V?
Yes, LM53601LQDSXTQ1 can start and regulate down to 3.55 V input after startup, as confirmed in Section 7.6 of the datasheet. However, full functionality (including 1000 mA load capability and 2.1-MHz operation) requires VIN ≥ 3.8 V for 5-V output. Below 3.8 V, switching frequency folds back and regulation accuracy degrades - verify performance in actual application conditions.
What is the purpose of the DAP (exposed thermal pad) on LM53601LQDSXTQ1?
The DAP on LM53601LQDSXTQ1 serves exclusively as a thermal interface - it must be soldered to a solid PCB ground plane using ≥4 thermal vias to achieve the specified RθJB = 20.9°C/W. It has no electrical function; connecting it to any net other than ground violates the thermal model and risks exceeding 150°C junction temperature under load.
LM53601LQDSXTQ1 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)
LM53601LQDSXTQ1 FAQ
1.How can I place an order for LM53601LQDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601LQDSXTQ1 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 LM53601LQDSXTQ1 reliable?
The price and inventory of LM53601LQDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601LQDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM53601LQDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601LQDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601LQDSXTQ1?
LM53601LQDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601LQDSXTQ1 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 LM53601LQDSXTQ1?
For technical support, including LM53601LQDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601LQDSXTQ1 requirements.
6.How does Aetrix verify that LM53601LQDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601LQDSXTQ1 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 LM53601LQDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM53601LQDSXTQ1?
All LM53601LQDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601LQDSXTQ1, 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 LM53601LQDSXTQ1 part is unused and in its original packaging.
Return procedure for LM53601LQDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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