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Texas Instruments LM53601AQDSXRQ1
- Part No.:
- LM53601AQDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601AQDSXRQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM53601AQDSXRQ1 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 23 µA quiescent current - used in automotive camera power rails requiring compact, high-efficiency 3.3-V or 5-V regulation.
For engineers reviewing the LM53601AQDSXRQ1 datasheet, LM53601AQDSXRQ1 pinout, LM53601AQDSXRQ1 application, or LM53601AQDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and ESD specs, and real-world selection guidance for camera and ADAS subsystems.
Technical Context
The LM53601AQDSXRQ1 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 above the AM band. Its architecture supports seamless PWM/PFM transitions and diode emulation in AUTO mode.
It integrates a 3-V internal regulator (VCC), open-drain RESET with 4–8 ms delay and 24-µs glitch filtering, external SYNC/MODE pin for forced PWM or synchronization, and thermal shutdown at 151–185°C. The device uses dual MOSFETs with 220-mΩ high-side and 200-mΩ low-side RDS(on), supporting 1.5–2.1-A high-side current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1000 mA max - supports full-load operation in automotive camera modules without derating at 125°C ambient. |
| Input Voltage Range | 3.55 V to 36 V - enables direct battery connection (12 V/24 V systems) with 42-V transient tolerance for load-dump immunity. |
| Switching Frequency | 2.1 MHz fixed - allows use of small 1-µH inductors and avoids AM-band interference, reducing EMI filter size. |
| Quiescent Current | 23 µA - sustains ultra-low-power sleep modes in always-on ADAS sensors without auxiliary LDOs. |
| Shutdown Current | 1.8 µA - eliminates need for external load switches in ignition-off scenarios. |
| Output Options | Adjustable (via FB divider) - provides design flexibility for non-standard rail voltages (3.3 V to 6 V) with ±2% accuracy. |
| Junction Temp Range | –40°C to 150°C - meets AEC-Q100 Grade 1 requirements for under-hood and camera housing environments. |
Pinout & Package
LM53601AQDSXRQ1 is housed in a wettable-flank 10-pin WSON (DSX) package, 3.00 mm × 3.00 mm, with exposed thermal pad (DAP) requiring direct solder connection to PCB ground plane for thermal performance (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 trace to minimize ringing. |
| 2 BOOT | High-side gate driver supply | Supplies gate drive for upper MOSFET; requires 100-nF ceramic capacitor between BOOT and SW. |
| 3 VCC | Internal 3-V regulator output | Power source for control circuitry; bypass with 1.0-µF capacitor to GND (not AGND) for adjustable versions. |
| 4 FB | Feedback input (adjustable version) | Sets output voltage via resistor divider; input bias current <20 nA ensures minimal divider error. |
| 5 BIAS | VCC regulator power source | Connected to output rail; supplies VCC regulator - bypass with 10-nF capacitor adjacent to pin. |
| 6 RESET | Open-drain reset output | Asserts low on fault or EN=low; 4–8 ms delay and 24-µs glitch filter eliminate false resets during transients. |
| 7 EN | Enable input | Logic-high active; threshold 1.7–2.0 V with 0.4–0.55 V hysteresis - 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 | Mode control & sync input | Tied low for AUTO mode (PFM + diode emulation); tied high for forced PWM; accepts 1.9–2.3 MHz sync signal. |
| 10 GND | Power ground | Primary return path for VIN, SW, and control circuits - must be connected to solid ground plane under DAP. |
| DAP | Exposed thermal pad | Electrically connected to GND only; sole purpose is thermal conduction - no electrical signaling function. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum option | Reduces peak EMI by ±4% frequency dithering - improves CISPR-25 Class 5 compliance without added shielding. |
| Pin-selectable forced PWM | Eliminates audible noise and output ripple variation in sensitive imaging systems by disabling PFM mode. |
| Integrated RESET with delay | Replaces discrete supervisor ICs - provides system-ready indication after soft-start completion and output stabilization. |
| Internal compensation | Removes need for external compensation network - reduces BOM count and layout sensitivity for 3.3-V/5-V outputs. |
| Wettable flank package | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface logic in rear-view or surround-view cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator delivering 800 mA continuous current with 23-µA quiescent draw during vehicle sleep mode. Use Value: Enables single-chip solution replacing LDO + supervisor, reducing board area by >30% and eliminating cold-start dropout below 3.8 V input. |
Use Scenario: Generates clean 5-V supply for Ethernet PHYs and CAN transceivers in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter synchronized to system clock via SYNC/MODE pin to reduce beat-frequency noise. Use Value: Achieves 85% efficiency at 1-A load with 2.1-MHz operation, allowing compact 1210-size inductors and meeting ISO 11452-2 radiated emissions limits. |
| Automotive Body Control Module | Infotainment Display Backlight Driver |
|
Use Scenario: Supplies regulated 5-V rail to microcontrollers and LIN transceivers in door modules and seat controllers. IC Role / Device Role / Timing Role: Automotive-grade buck regulator with AEC-Q100 Grade 1 qualification and 150°C junction rating for under-dash mounting. Use Value: Withstands 42-V load dump transients without external TVS, simplifying protection circuitry and lowering system cost. |
Use Scenario: Provides stable 3.3-V bias for LED driver ICs in digital instrument clusters with variable dimming profiles. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured for 3.3 V with ±2% accuracy over temperature and line/load variations. Use Value: Maintains regulation down to 3.55-V input during cranking, preventing display flicker or reset events in start-stop vehicles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53600AQDSXRQ1 | 650-mA rated output; identical pinout, package, and feature set except lower current limit and reduced high-side switch RDS(on) (1.35 A vs 1.83 A). | Targeted at lower-power camera modules or sensors where 1-A capability is unnecessary. | Select when load current ≤650 mA and cost optimization is prioritized over headroom. |
| TPS543B20RTWR | 3-A output, 2.2-MHz switching, integrated FETs, but requires external compensation and lacks spread spectrum or wettable flanks. | Used in higher-power ADAS ECUs needing >1-A rails; not AEC-Q100 certified out-of-box. | Choose only if higher current and programmability outweigh automotive qualification and layout simplicity. |
Compared with LM53600AQDSXRQ1, the LM53601AQDSXRQ1 offers 54% higher output current and improved thermal margin at 150°C junction, while TPS543B20RTWR trades automotive qualification and integrated features for raw power density - making LM53601AQDSXRQ1 optimal for qualified, space-constrained camera and body electronics.
Availability
LM53601AQDSXRQ1 is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS domain controllers, and body control modules requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for LM53601AQDSXRQ1 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.
The LM53600/01-Q1 product line was designed specifically for automotive subsystems demanding high reliability, wide input range, and ultra-low quiescent current - targeting camera, radar, and body electronics where space, thermal, and qualification constraints dominate.
FAQ
What is the maximum output current supported by the LM53601AQDSXRQ1?
The LM53601AQDSXRQ1 supports a maximum recommended output current of 1000 mA across its full operating temperature range (–40°C to 150°C junction). This rating is validated per AEC-Q100 Grade 1 conditions and accounts for thermal derating in high-ambient environments. Exceeding 1000 mA may trigger current-limit protection or thermal shutdown, especially above 125°C ambient.
Does the LM53601AQDSXRQ1 require external compensation components?
No, the LM53601AQDSXRQ1 features fully internal compensation, eliminating the need for external RC networks. This simplifies layout, reduces BOM count, and ensures stability across all supported output configurations (3.3 V, 5 V, or adjustable) when using recommended inductor and capacitor values from the datasheet.
How does the RESET output of the LM53601AQDSXRQ1 behave during startup and fault conditions?
The LM53601AQDSXRQ1 RESET output remains low until the output voltage reaches 92–97% of its target (e.g., 3.04–3.20 V for 3.3 V output), then asserts high after a 4–8 ms delay. It goes low again if EN is deasserted, output drops below threshold, or thermal shutdown activates - providing reliable system supervision without external circuitry.
Can the LM53601AQDSXRQ1 operate with an input voltage below 3.8 V?
Yes - the LM53601AQDSXRQ1 can start and regulate from as low as 3.55 V after startup, though full functionality (including specified efficiency and regulation accuracy) requires ≥3.8 V for 3.3-V output. Below 3.8 V, it enters dropout mode with reduced duty cycle; minimum input-to-output differential is 0.6 V at 1-A load.
Is the LM53601AQDSXRQ1 pin-compatible with other devices in the LM536xx-Q1 family?
Yes - the LM53601AQDSXRQ1 shares identical 10-pin WSON (DSX) package, pinout, and footprint with all LM53600/01-Q1 variants, including LM53600AQDSXRQ1 and LM536013QDSXRQ1. This enables drop-in replacement across output voltage and current variants without PCB redesign.
LM53601AQDSXRQ1 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)
LM53601AQDSXRQ1 FAQ
1.How can I place an order for LM53601AQDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601AQDSXRQ1 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 LM53601AQDSXRQ1 reliable?
The price and inventory of LM53601AQDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601AQDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM53601AQDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601AQDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601AQDSXRQ1?
LM53601AQDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601AQDSXRQ1 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 LM53601AQDSXRQ1?
For technical support, including LM53601AQDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601AQDSXRQ1 requirements.
6.How does Aetrix verify that LM53601AQDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601AQDSXRQ1 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 LM53601AQDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM53601AQDSXRQ1?
All LM53601AQDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601AQDSXRQ1, 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 LM53601AQDSXRQ1 part is unused and in its original packaging.
Return procedure for LM53601AQDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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