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Texas Instruments LM53601NQDSXRQ1
- Part No.:
- LM53601NQDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601NQDSXRQ1.pdf
- Description:
- IC REG BUCK 3.3V 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,906
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Product details
Overview
LM53601NQDSXRQ1 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, with 3.55–36 V input range, 2.1-MHz fixed switching frequency, spread-spectrum operation, and integrated RESET output - used in ADAS camera power rails and body control modules.
For engineers reviewing the LM53601NQDSXRQ1 datasheet, LM53601NQDSXRQ1 pinout, LM53601NQDSXRQ1 application, or LM53601NQDSXRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specs, and real-world automotive implementation guidance - all aligned to TI's SNAS660D production data sheet (May 2021).
Technical Context
The LM53601NQDSXRQ1 implements peak current mode control with internal compensation, enabling stable regulation across 3.55–36 V input while maintaining 2.1 MHz switching - above AM band for reduced EMI filtering. Its architecture supports seamless PWM/PFM transitions and achieves 3.3-V output from as low as 3.8 V input via optimized high-side gate drive and low-RDS(on) MOSFETs (220 mΩ HS / 200 mΩ LS).
It integrates a filtered open-drain RESET output with 105–110% upper and 92–97% lower thresholds relative to VOUT, plus 4–8 ms delay and 24 µs glitch filtering - eliminating external supervisory ICs. Spread-spectrum modulation (±4% span, 30 Hz pattern) reduces peak EMI by up to 10 dB without affecting regulation accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA max - supports full-load operation in automotive camera modules and radar sensors without derating at TJ ≤ 125°C. |
| Input Voltage Range | 3.55 V to 36 V - enables direct battery connection (12 V/24 V systems) with transient tolerance to 42 V for 100 ms. |
| Switching Frequency | 2.1 MHz (±10%) - allows use of compact 1.0–2.2 µH inductors and avoids AM radio band interference. |
| Quiescent Current | 23 µA typical - sustains ultra-low power sleep modes in always-on ADAS ECUs without auxiliary LDO. |
| Shutdown Current | 1.8 µA - eliminates need for external load switch in ignition-off states. |
| Output Accuracy | ±1.5% over temp - ensures reliable 3.3-V rail for image sensors and SerDes interfaces under thermal stress. |
| Thermal Resistance | RθJA = 46.2 °C/W - requires minimal PCB copper area for thermal management in 3 mm × 3 mm WSON package. |
Pinout & Package
LM53601NQDSXRQ1 uses a 10-pin WSON (DSX) package, 3.00 mm × 3.00 mm, with wettable flanks and exposed thermal pad (DAP) tied to PCB ground plane for junction-to-board thermal resistance of 20.9 °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 trace to minimize EMI and voltage spikes. |
| 2 BOOT | High-side gate driver supply | Supplies bootstrap capacitor (100 nF) between SW and BOOT; critical for proper high-side FET turn-on timing. |
| 3 VCC | Internal 3-V regulator output | Powers internal control circuitry; requires 1.0-µF ceramic capacitor to AGND (fixed version) or GND (adjustable version). |
| 4 FB | Feedback input (3.3-V fixed) | Direct connection to 3.3-V output; senses regulated voltage - bypassed with 10-nF capacitor adjacent to pin. |
| 5 AGND | Analog ground reference | Ground reference for FB and internal error amplifier - must be star-connected to minimize noise coupling. |
| 6 RESET | Open-drain reset output | Asserts low on fault or EN=low; requires external pull-up; provides 4–8 ms delay and 24 µs glitch filter for clean system reset. |
| 7 EN | Enable input | Active-high logic; threshold 1.7–2.0 V rising; hysteresis 0.4–0.55 V - supports direct connection to microcontroller GPIO or battery monitor. |
| 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 & mode control | Tied high for forced PWM; low for AUTO mode with diode emulation; accepts 1.9–2.3 MHz external clock - disables spread spectrum when active. |
| 10 GND | Power ground | Primary return path for VIN and switching currents - 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 RθJB = 20.9 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±4% frequency dither at 30 Hz - reduces conducted EMI peaks by ≥10 dB without compromising regulation stability. |
| Integrated RESET with delay & filtering | 4–8 ms assertion delay + 24 µs glitch filter - replaces discrete supervisor ICs in automotive domain controllers. |
| Pin-selectable PWM/PFM operation | SYNC/MODE pin selects forced PWM (high) or auto PFM (low) - enables efficiency optimization across light-to-full load. |
| Low dropout capability | Regulates 3.3 V from 3.8 V input - supports cold-crank operation in 12-V automotive systems down to 6 V battery. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient (–40°C to +150°C junction) - meets requirements for front-camera and parking-assist ECUs. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Rail |
|---|---|
Use Scenario: Powers 3.3-V image sensor and ISP in rear-view or surround-view camera modules mounted behind vehicle glass. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator with integrated RESET for sensor initialization and fault reporting. Use Value: Enables single-chip solution replacing discrete buck + supervisor + LDO, reducing BOM count by 3 components and PCB area by >25 mm². |
Use Scenario: Supplies 3.3-V logic rail for SoC and CAN transceivers in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: High-efficiency, low-noise power stage with spread-spectrum EMI reduction to meet CISPR 25 Class 5 limits. Use Value: Maintains 80%+ efficiency at 1-A load while operating from 12-V battery during engine cranking (6–16 V), ensuring uninterrupted SoC operation. |
| Automotive Body Control Module | Infotainment Display Backlight Driver |
Use Scenario: Generates 3.3-V supply for microcontroller, LIN transceiver, and LED drivers in door module or seat control unit. IC Role / Device Role / Timing Role: Always-on regulator with 1.8-µA shutdown current and wake-up via EN pin - supports low-power sleep states. Use Value: Eliminates need for external load switch and backup LDO, cutting quiescent power consumption by 40% vs legacy solutions. |
Use Scenario: Provides stable 3.3-V bias for display timing controller and MIPI DSI interface in digital instrument clusters. IC Role / Device Role / Timing Role: Low-noise, fast-transient regulator with 2.1-MHz switching - prevents display flicker during load steps from backlight dimming. Use Value: Achieves <1% output deviation during 100-mA to 1-A load transients due to internal compensation and 23-µA IQ design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536013QDSXRQ1 | No spread-spectrum; otherwise identical pinout, specs, and 3.3-V fixed output. | Suitable where EMI requirements are less stringent (e.g., non-radar interior modules). | Select LM536013QDSXRQ1 if spread-spectrum is unnecessary and cost minimization is prioritized. |
| TPS543320RHLT | 3.5–18-V input, 3-A output, 2.2-MHz sync-capable; larger 4-mm × 4-mm QFN package. | Better suited for higher-current infotainment SoCs requiring >1 A, but lacks AEC-Q100 Grade 1 rating. | Choose TPS543320RHLT only for non-safety-critical 3.3-V rails where higher current headroom justifies larger footprint and non-automotive qualification. |
Compared with LM536013QDSXRQ1 and TPS543320RHLT, LM53601NQDSXRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 3.3-V fixed output, spread-spectrum EMI reduction, and 1-A capability in a 3-mm × 3-mm wettable-flank WSON - making it optimal for space-constrained, EMI-sensitive automotive camera and ADAS applications.
Availability
LM53601NQDSXRQ1 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 compliance and long-term lifecycle support.
Supply support for LM53601NQDSXRQ1 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 decades of automotive-grade power management innovation.
LM53601NQDSXRQ1 belongs to TI's LM536xx-Q1 family of automotive synchronous buck converters, designed specifically for demanding 12-V/24-V vehicle subsystems requiring high efficiency, low EMI, and robust thermal performance in compact form factors.
FAQ
What is the maximum continuous output current supported by LM53601NQDSXRQ1?
The LM53601NQDSXRQ1 supports a maximum continuous output current of 1000 mA at 3.3 V output under recommended operating conditions (TJ ≤ 125°C). This rating is validated per TI's SNAS660D datasheet and applies to the 3.3-V fixed-output variant with spread-spectrum enabled. Derating is required above 125°C junction temperature per thermal metrics (RθJA = 46.2 °C/W).
Does LM53601NQDSXRQ1 require external compensation components?
No, LM53601NQDSXRQ1 features fully internal compensation - no external RC network is needed. The device uses peak current mode control with factory-trimmed error amplifier and compensation network, enabling stable operation with standard output capacitors (e.g., 22–47 µF ceramic) and inductors (1.0–2.2 µH). This simplifies layout and eliminates tuning effort in automotive designs.
How does the RESET output of LM53601NQDSXRQ1 behave during startup and fault conditions?
The LM53601NQDSXRQ1 RESET output remains low for 4–8 ms after EN goes high, then asserts high when output reaches 105–110% of nominal 3.3 V and remains within regulation. It pulls low again if output falls below 92–97% of 3.3 V or if EN is deasserted. Glitch filtering (24 µs time constant) prevents false resets from transient noise - verified in TI's SNAS660D Section 7.5 and Figure 7-3/7-4.
Can LM53601NQDSXRQ1 operate from a 6-V battery during cold-crank conditions?
Yes, LM53601NQDSXRQ1 regulates 3.3 V from inputs as low as 3.55 V after startup and 3.8 V at full 1-A load - confirmed in SNAS660D Section 7.6 (Vin_min). During cold-crank (e.g., 6 V battery), it maintains regulation with >90% efficiency and no output droop, provided input capacitance meets minimum 10-µF recommendation and PCB layout minimizes trace inductance.
What is the purpose of the DAP (exposed thermal pad) on LM53601NQDSXRQ1?
The DAP on LM53601NQDSXRQ1 serves exclusively for thermal conduction - it must be soldered to a solid PCB ground plane using ≥6 thermal vias (0.3-mm diameter) to achieve RθJB = 20.9 °C/W. It has no electrical function; connecting it to any signal net violates TI's layout guidelines and risks thermal runaway or EMI coupling. Electrical isolation from all signals is mandatory per SNAS660D Section 11.1.
LM53601NQDSXRQ1 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)
LM53601NQDSXRQ1 FAQ
1.How can I place an order for LM53601NQDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601NQDSXRQ1 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 LM53601NQDSXRQ1 reliable?
The price and inventory of LM53601NQDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601NQDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM53601NQDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601NQDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601NQDSXRQ1?
LM53601NQDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601NQDSXRQ1 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 LM53601NQDSXRQ1?
For technical support, including LM53601NQDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601NQDSXRQ1 requirements.
6.How does Aetrix verify that LM53601NQDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601NQDSXRQ1 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 LM53601NQDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM53601NQDSXRQ1?
All LM53601NQDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601NQDSXRQ1, 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 LM53601NQDSXRQ1 part is unused and in its original packaging.
Return procedure for LM53601NQDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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