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Texas Instruments LM53601MQDSXRQ1
- Part No.:
- LM53601MQDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601MQDSXRQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,165
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Product details
Overview
LM53601MQDSXRQ1 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 - used in automotive camera power rails.
For engineers reviewing the LM53601MQDSXRQ1 datasheet, LM53601MQDSXRQ1 pinout, LM53601MQDSXRQ1 application, or LM53601MQDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world alternative selection guidance for safety-critical power design.
Technical Context
The LM53601MQDSXRQ1 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 while maintaining 2.1-MHz fixed-frequency operation. Its architecture supports seamless PWM/PFM transitions and diode-emulation light-load mode via SYNC/MODE pin configuration.
It integrates a high-side MOSFET (Rdson = 220 mΩ), low-side MOSFET (Rdson = 200 mΩ), internal 3-V VCC regulator, open-drain RESET with 4–8 ms delay and ±4% hysteresis, and thermal shutdown at 151–185°C. The device uses a 10-pin WSON package with wettable flanks and exposed thermal pad tied to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA max - supports full-power operation in ADAS camera modules without external current boosting. |
| Input Voltage Range | 3.55 V to 36 V - enables direct connection to automotive battery (cold-crank down to ~4 V) with 42-V transient tolerance. |
| Switching Frequency | 2.1 MHz (±10%) - places switching above AM band, minimizing EMI filter size and cost in compact PCB layouts. |
| Quiescent Current | 23 µA - sustains ultra-low standby power in always-on vehicle systems without auxiliary LDOs. |
| Shutdown Current | 1.8 µA - allows deep sleep states in infotainment or ADAS ECUs with minimal battery drain. |
| Output Options | Adjustable (via FB divider) - supports custom rail voltages (3.3–6 V) with ±1.5% initial accuracy and ±2.5% load regulation. |
| Thermal Rating | Junction range –40°C to 150°C - qualified for under-hood deployment with no derating below 125°C ambient. |
| EMI Reduction | Spread spectrum enabled - reduces peak radiated emissions by ±4% frequency dithering, easing CISPR 25 Class 5 compliance. |
Pinout & Package
LM53601MQDSXRQ1 uses a 10-lead, 3.0 mm × 3.0 mm WSON (DSX) package with wettable flanks and an exposed thermal pad (DAP) electrically isolated but thermally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects directly to inductor; carries high di/dt switching current - requires tight layout and Kelvin routing to minimize noise. |
| 2 BOOT | High-side gate driver supply | Requires 100-nF ceramic capacitor between BOOT and SW; critical for proper high-side FET turn-on timing. |
| 3 VCC | Internal 3-V regulator output | Supplies internal control circuitry; bypassed with 1.0-μF capacitor to AGND (fixed) or GND (adjustable). |
| 4 FB | Feedback input (adjustable mode) | Accepts voltage divider from output; sets VOUT = 1.0 V × (1 + R1/R2); input bias current ≤20 nA ensures accuracy. |
| 5 BIAS | VCC regulator power source | Connected to output node; supplies VCC regulator - must be bypassed with 10-nF capacitor adjacent to pin. |
| 6 RESET | Open-drain reset output | Asserts low when EN = low or output fault occurs; includes 24-µs glitch filter and 4–8 ms delay - replaces external supervisor IC. |
| 7 EN | Enable input | Active-high logic; threshold 1.7–2.0 V with 0.4–0.55 V hysteresis - supports direct microcontroller GPIO control. |
| 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 | Pulled high → forced PWM; pulled 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 be solidly connected to PCB ground plane beneath DAP. |
| DAP | Exposed thermal pad | Electrically isolated GND connection for thermal dissipation - requires ≥80% solder coverage and direct thermal via connection to inner ground layers. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM ±2 kV and CDM ±750 V ESD robustness - meets automotive reliability requirements. |
| Integrated RESET with filtering | Provides system-ready signal with 24-µs glitch immunity and 4–8 ms release delay - eliminates need for discrete reset IC and saves board space. |
| Pin-selectable PWM/PFM modes | SYNC/MODE pin configures forced PWM (low noise, fixed frequency) or AUTO mode (high efficiency at light loads) - optimizes performance per operating condition. |
| Internal compensation | Reduces external component count to only input/output capacitors, inductor, and optional feedback resistors - accelerates design and improves layout reproducibility. |
| Low dropout capability | Maintains regulation with VIN as low as 3.8 V for 3.3-V output - supports cold-crank operation in 12-V automotive systems without pre-regulation. |
| Thermal protection with hysteresis | Shuts down at 151–185°C junction temperature and restarts at 140–157°C - prevents thermal runaway during overload or poor heatsinking. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface circuitry in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Primary 3.3-V or adjustable buck regulator supplying clean, low-noise power with fast transient response to handle burst-mode imaging. Use Value: 23-µA quiescent current extends battery life during vehicle sleep; 42-V transient tolerance withstands load-dump events without protection circuitry. |
Use Scenario: Generates intermediate 5-V or 3.3-V rails for radar preprocessing units, Ethernet switches, or MCU peripherals in centralized ADAS ECUs. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter operating in forced PWM mode synchronized to system clock for deterministic EMI behavior. Use Value: Spread-spectrum option reduces peak radiated emissions by ±4%, easing CISPR 25 Class 5 compliance in dense electronic environments. |
| Automotive Body Control Module | In-Cabin Infotainment Display |
|
Use Scenario: Supplies regulated power to LIN transceivers, LED drivers, and microcontrollers in door modules or seat controllers. IC Role / Device Role / Timing Role: Compact, AEC-Q100-compliant step-down regulator replacing discrete buck solutions with integrated FETs and protection. Use Value: 1000-mA output current supports multiple downstream loads; wettable-flank WSON package enables automated optical inspection (AOI) in high-volume manufacturing. |
Use Scenario: Powers touch controller, display backlight driver, and audio codec in center-stack displays subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-grade buck converter with –40°C to 150°C junction rating ensuring reliable operation behind heated glass or near HVAC vents. Use Value: Internal soft-start (1.3–4.5 ms) prevents inrush current damage to capacitors; RESET output provides sequenced power-good signaling to SoC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM536013QDSXRQ1 | Fixed 3.3-V output; no spread-spectrum; same 1000-mA rating and WSON package. | Eliminates FB resistor network but lacks adjustable output flexibility for multi-rail designs. | Select when 3.3 V is fixed requirement and EMI margin permits omission of spread-spectrum. |
| TPS543320RTWR | 3-A output, 2.2-MHz switching, integrated MOSFETs, but not AEC-Q100 qualified; larger 16-pin QFN package. | Suitable for non-automotive industrial or computing applications requiring higher current. | Choose only for non-automotive use cases where AEC-Q100 is not mandated and >1-A output is needed. |
Compared with LM536013QDSXRQ1 and TPS543320RTWR, the LM53601MQDSXRQ1 uniquely combines AEC-Q100 Grade 1 qualification, spread-spectrum EMI reduction, and adjustable output in a compact wettable-flank WSON package - making it the only drop-in solution for automotive camera and ADAS subsystems requiring both reliability and design flexibility.
Availability
LM53601MQDSXRQ1 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 LM53601MQDSXRQ1 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 IC development and AEC-Q100 qualification expertise.
The LM53601MQDSXRQ1 belongs to TI's automotive-qualified DC/DC converter portfolio, designed specifically for demanding power management in camera modules, ADAS sensors, and body electronics where reliability, thermal robustness, and EMI control are critical.
FAQ
What is the maximum output current supported by the LM53601MQDSXRQ1?
The LM53601MQDSXRQ1 supports a maximum continuous output current of 1000 mA under recommended operating conditions (–40°C to 150°C junction temperature, proper thermal layout). This rating applies across its full input voltage range (3.55 V to 36 V) and is validated for automotive Grade 1 ambient operation. Derating may be required at elevated ambient temperatures or with insufficient PCB copper area for heat dissipation.
Does the LM53601MQDSXRQ1 require external compensation components?
No, the LM53601MQDSXRQ1 features fully internal compensation, eliminating the need for external Type II or Type III compensation networks. This simplifies design, reduces BOM count, and improves layout reproducibility. Only input/output capacitors, the power inductor, and optional feedback resistors (for adjustable output) are required - all specified in TI's SNAS660D datasheet typical application circuits.
How does the spread-spectrum feature function in the LM53601MQDSXRQ1?
The LM53601MQDSXRQ1 implements hardware-based spread-spectrum modulation with ±4% frequency dithering centered at 2.1 MHz and a 30-Hz pattern frequency. This reduces peak radiated emissions without affecting regulation performance or requiring firmware control. Spread spectrum is enabled by default in the "M" suffix variant (LM53601MQDSXRQ1) and disabled when the SYNC/MODE pin receives a valid external clock signal.
What is the purpose of the BIAS pin on the LM53601MQDSXRQ1?
The BIAS pin on the LM53601MQDSXRQ1 serves as the power source for the internal 3-V VCC regulator in adjustable-output configurations. It must be connected directly to the output voltage node and bypassed with a 10-nF capacitor placed adjacent to the pin. This configuration improves efficiency and stability compared to using VIN for VCC generation, especially at low input-to-output voltage differentials.
Can the LM53601MQDSXRQ1 operate with an input voltage below 3.8 V?
Yes - the LM53601MQDSXRQ1 can start and regulate from as low as 3.55 V after startup, and maintains regulation down to VIN = VOUT + 0.6 V (e.g., 3.9 V for 3.3-V output) in FPWM mode. However, full functionality including guaranteed 1000-mA output and 2.1-MHz operation requires VIN ≥ 3.8 V for 3.3-V outputs and ≥ 5.5 V for 5-V outputs, per Section 7.3 of the SNAS660D datasheet.
LM53601MQDSXRQ1 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)
LM53601MQDSXRQ1 FAQ
1.How can I place an order for LM53601MQDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601MQDSXRQ1 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 LM53601MQDSXRQ1 reliable?
The price and inventory of LM53601MQDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601MQDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM53601MQDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601MQDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601MQDSXRQ1?
LM53601MQDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601MQDSXRQ1 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 LM53601MQDSXRQ1?
For technical support, including LM53601MQDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601MQDSXRQ1 requirements.
6.How does Aetrix verify that LM53601MQDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601MQDSXRQ1 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 LM53601MQDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM53601MQDSXRQ1?
All LM53601MQDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601MQDSXRQ1, 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 LM53601MQDSXRQ1 part is unused and in its original packaging.
Return procedure for LM53601MQDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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