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Texas Instruments LM53601NQDSXTQ1
- Part No.:
- LM53601NQDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601NQDSXTQ1.pdf
- Description:
- IC REG BUCK 3.3V 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:936
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Product details
Overview
LM53601NQDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering up to 1000 mA at 3.3 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 capability - deployed in ADAS camera power rails.
For engineers reviewing the LM53601NQDSXTQ1 datasheet, LM53601NQDSXTQ1 pinout, LM53601NQDSXTQ1 application, or LM53601NQDSXTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world implementation constraints for safety-critical 12-V vehicle systems.
Technical Context
The LM53601NQDSXTQ1 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 above the AM band. Its architecture supports seamless PWM/PFM transitions and diode emulation in AUTO mode.
It integrates a 3-V internal LDO for biasing, open-drain RESET with 4–8 ms delay and ±3% hysteresis, SYNC/MODE pin for external clock synchronization or forced PWM/AUTO mode 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 max - supports full-power operation of automotive image sensors and radar SoCs without derating at 125°C ambient. |
| Input Voltage Range | 3.55 V to 36 V - enables direct connection to 12-V battery rail with cold-crank (3.55 V) and load-dump (42 V transient) robustness. |
| Switching Frequency | 2.1 MHz (±10%) - allows use of compact 1.0–2.2 µH inductors and avoids AM radio interference band. |
| Quiescent Current | 23 µA - sustains low-power camera sleep modes without auxiliary LDO, reducing system BOM count. |
| Shutdown Current | 1.8 µA - eliminates need for external load switch in always-on vehicle domains. |
| Output Voltage | Fixed 3.3 V ±2% - meets I/O voltage requirements of SerDes interfaces (e.g., GMSL, FPD-Link) and microcontrollers. |
| Spread Spectrum | Enabled - reduces EMI peak amplitude by ±4% frequency dithering, easing CISPR 25 Class 5 compliance. |
Pinout & Package
LM53601NQDSXTQ1 uses a 10-pin WSON (DSX) package, 3.0 mm × 3.0 mm body size, with wettable flanks and thermally enhanced exposed DAP (die attach pad) requiring direct PCB ground connection for thermal management (RθJA = 46.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects 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 floating gate drive for upper MOSFET; requires 100-nF ceramic capacitor between BOOT and SW. |
| 3 VCC | Internal regulator output | Provides 3.05–3.15 V bias for control circuitry; requires 1.0-µF capacitor to AGND (fixed version) or GND (adjustable). |
| 4 FB | Feedback input (fixed 3.3 V) | Direct connection to output node; senses regulated 3.3 V; bypassed with 10-nF capacitor adjacent to pin. |
| 5 AGND | Analog ground reference | Ground reference for FB and internal analog circuits - must be connected to quiet ground plane, separate from power GND if possible. |
| 6 RESET | Open-drain reset indicator | Asserts low on fault or EN=low; requires external pull-up; provides 4–8 ms delay and filtered release for reliable system boot sequencing. |
| 7 EN | Enable input | Active-high logic; threshold 1.7–2.0 V; includes 0.4–0.55 V hysteresis to reject noise; must not be left floating. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 4.7–10 µF ceramic input capacitor placed adjacent to pin and GND. |
| 9 SYNC/MODE | Mode control & sync input | Selects AUTO (diode emulation), FPWM, or external sync (1.9–2.3 MHz); tolerant to VIN; disables spread spectrum when synced. |
| 10 GND | Power ground | Primary return path for high-current loops; must be tied to AGND at single point near IC; connects to DAP for thermal conduction. |
| DAP | Thermal pad (exposed) | Electrically isolated ground connection; sole purpose is thermal dissipation - must be soldered to solid copper ground plane. |
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 - suitable for under-hood and ADAS ECUs. |
| Integrated RESET with delay & filtering | Eliminates external supervisor IC; provides glitch-immune power-good signal with 24-µs filter and 4–8 ms release delay for deterministic boot timing. |
| Pin-selectable AUTO/FPWM modes | Enables light-load efficiency optimization (AUTO with diode emulation) or constant-frequency noise control (FPWM) without firmware changes. |
| Internal compensation | Reduces external component count to only input/output capacitors, inductor, and BOOT capacitor - simplifies layout and accelerates design validation. |
| Low dropout capability | Maintains regulation with only 0.6 V VIN–VOUT differential at 1 A - supports 3.3-V output from 3.9-V input during cold-crank conditions. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers 3.3-V image sensor and ISP in rear-view or surround-view camera modules mounted in exterior housings. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator delivering 1 A with <4-ms RESET assertion delay to coordinate sensor initialization after ignition. Use Value: Enables direct battery connection without pre-regulator; spread spectrum reduces EMI coupling into analog video signals. |
Use Scenario: Supplies 3.3-V core logic for radar or vision processing SoCs in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: High-efficiency, low-noise power stage supporting dynamic load steps up to 1 A with <100-µs transient response. Use Value: 23-µA quiescent current extends battery life in parked surveillance mode; thermal shutdown protects against enclosure overheating. |
| Automotive Body Control Module (BCM) | Telematics Control Unit (TCU) Interface Rail |
|
Use Scenario: Generates 3.3-V supply for CAN transceivers, LIN interface ICs, and microcontroller peripherals in BCMs. IC Role / Device Role / Timing Role: Stable, low-ripple 3.3-V source with integrated RESET used for microcontroller brown-out detection and safe state entry. Use Value: Eliminates discrete supervisor and LDO; 36-V input rating accommodates jump-start and alternator surge events. |
Use Scenario: Provides clean 3.3-V rail for cellular modem baseband processors and GNSS receivers in TCUs. IC Role / Device Role / Timing Role: Synchronous buck converter with 2.1-MHz switching synchronized to system clock to avoid beat frequencies with RF front-end. Use Value: SYNC/MODE pin enables deterministic clock alignment; wettable flanks support automated optical inspection (AOI) in high-reliability manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536013QDSXTQ1 | No spread spectrum; otherwise identical pinout, 3.3-V fixed output, and 1-A rating. | Suitable where EMI requirements are less stringent and cost minimization is prioritized over CISPR 25 margin. | Select LM536013QDSXTQ1 if spread spectrum is unnecessary and BOM cost reduction is critical. |
| TPS543B20RTWR | 3.5–18-V input, 15-A capability, PMBus interface, larger 4-mm × 4-mm QFN package. | Targets higher-power ADAS compute modules; lacks AEC-Q100 Grade 1 qualification and automotive temp range. | Choose TPS543B20RTWR only for non-safety-critical, high-current applications outside AEC-Q100 scope. |
Compared with LM536013QDSXTQ1 and TPS543B20RTWR, LM53601NQDSXTQ1 uniquely combines AEC-Q100 Grade 1 qualification, 36-V input, spread spectrum, and 3.0-mm × 3.0-mm wettable-flank WSON - making it the only drop-in solution for space-constrained, EMI-sensitive automotive camera modules requiring full automotive lifecycle support.
Availability
LM53601NQDSXTQ1 is available at Aetrix Electronics and suitable for automotive camera modules, ADAS domain controllers, and body control units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM53601NQDSXTQ1 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 design.
LM53601NQDSXTQ1 belongs to TI's automotive-qualified DC/DC converter portfolio, engineered specifically for demanding vehicle environments including camera, radar, and infotainment subsystems requiring AEC-Q100 compliance and extended temperature operation.
FAQ
What is the maximum continuous output current of the LM53601NQDSXTQ1?
The LM53601NQDSXTQ1 supports a maximum continuous output current of 1000 mA at 3.3 V output under recommended operating conditions (TJ ≤ 150°C). This rating is validated across the full –40°C to +125°C ambient temperature range and accounts for thermal derating in high-power-density PCB layouts. The device maintains regulation down to a 0.6-V input-to-output differential at full load, enabling operation during automotive cold-crank events.
Does the LM53601NQDSXTQ1 require external compensation components?
No, the LM53601NQDSXTQ1 features fully internal compensation, eliminating the need for external RC networks or type-II/type-III compensators. Its peak current mode control architecture with built-in error amplifier and compensation network ensures stability with standard output capacitor types (e.g., 22–47 µF X5R/X7R ceramics) and inductors (1.0–2.2 µH). This reduces BOM count, board area, and design validation effort compared to controllers requiring external loop compensation.
How does the RESET function operate on the LM53601NQDSXTQ1?
The LM53601NQDSXTQ1 provides an open-drain RESET output that asserts low during startup until output reaches 92–97% of nominal 3.3 V, then releases high after a 4–8 ms delay. It reasserts low on undervoltage, overtemperature (>151°C), or EN pin deactivation. The internal 24-µs glitch filter prevents false triggering from noise, and the RESET pin requires an external pull-up resistor (typically 10–100 kΩ) to a valid supply. This integrated function replaces discrete supervisors in most automotive designs.
Can the LM53601NQDSXTQ1 be synchronized to an external clock?
Yes, the LM53601NQDSXTQ1 supports external synchronization via the SYNC/MODE pin. When driven with a 1.9–2.3 MHz square wave (25–75% duty cycle, logic-high ≥1.5 V), the device locks its switching frequency to the external clock's rising edge and operates in forced PWM mode. Spread spectrum is automatically disabled during synchronization. This capability enables EMI reduction through frequency dithering or deterministic clock alignment in multi-rail systems to avoid beat frequencies.
What package type and thermal characteristics does the LM53601NQDSXTQ1 have?
The LM53601NQDSXTQ1 uses a 10-pin WSON (DSX) package measuring 3.0 mm × 3.0 mm with wettable flanks and an exposed thermal pad (DAP). Its thermal resistance is RθJA = 46.2°C/W (JEDEC standard), RθJC(bot) = 4.1°C/W, and RθJB = 20.9°C/W. The DAP must be soldered to a dedicated PCB ground plane for effective heat dissipation; electrical isolation of the DAP is mandatory as it serves thermal, not electrical, functions.
LM53601NQDSXTQ1 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:
- 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)
LM53601NQDSXTQ1 FAQ
1.How can I place an order for LM53601NQDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601NQDSXTQ1 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 LM53601NQDSXTQ1 reliable?
The price and inventory of LM53601NQDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601NQDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM53601NQDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601NQDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601NQDSXTQ1?
LM53601NQDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601NQDSXTQ1 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 LM53601NQDSXTQ1?
For technical support, including LM53601NQDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601NQDSXTQ1 requirements.
6.How does Aetrix verify that LM53601NQDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601NQDSXTQ1 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 LM53601NQDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM53601NQDSXTQ1?
All LM53601NQDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601NQDSXTQ1, 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 LM53601NQDSXTQ1 part is unused and in its original packaging.
Return procedure for LM53601NQDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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