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Texas Instruments LM53601MQUDSXRQ1
- Part No.:
- LM53601MQUDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53601MQUDSXRQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,607
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Product details
Overview
LM53601MQUDSXRQ1 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 - used in automotive camera power rails requiring compact, low-noise, high-reliability regulation.
For engineers reviewing the LM53601MQUDSXRQ1 datasheet, LM53601MQUDSXRQ1 pinout, LM53601MQUDSXRQ1 application, or LM53601MQUDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world substitution guidance for production design-in.
Technical Context
The LM53601MQUDSXRQ1 implements peak current mode control with internal compensation, enabling stable operation across wide VIN (3.55–36 V) and VOUT (adjustable, 3.3 V or 5 V) ranges while maintaining 2.1-MHz fixed-frequency PWM or AUTO mode with diode emulation at light load. Its architecture supports seamless PWM/PSM transitions and achieves regulation down to VIN = VOUT + 0.6 V.
It integrates a 3-V internal LDO (VCC), open-drain RESET with 4–8 ms delay and ±3% 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 max - supports full-load operation in ADAS camera modules without derating at 125°C ambient. |
| Input Voltage Range | 3.55 V to 36 V - enables direct battery connection in 12-V automotive systems with cold-crank and load-dump resilience. |
| Switching Frequency | 2.1 MHz (±10%) - places switching noise above AM band, reducing EMI filter size and cost. |
| Quiescent Current | 23 µA - sustains ultra-low standby power in always-on vision systems without auxiliary LDO. |
| Shutdown Current | 1.8 µA - eliminates need for external load switch in ignition-off states. |
| Output Options | Adjustable (via FB divider) - allows precise tailoring of rail voltage for image sensor biasing or ISP core logic. |
| Spread Spectrum | Enabled - reduces peak EMI by ±4% frequency dithering, easing CISPR-25 Class 5 compliance. |
| Junction Temp Range | –40°C to 150°C - ensures functional operation under hood-mounted placement near engine compartments. |
Pinout & Package
LM53601MQUDSXRQ1 uses a 10-pin WSON (DSX) package, 3.0 mm × 3.0 mm body size, with non-wettable flanks and exposed thermal pad (DAP) requiring direct solder 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 short, low-inductance layout to minimize ringing. |
| 2 BOOT | High-side gate driver supply | Supplies bootstrap capacitor (100 nF) between SW and BOOT; critical for HS MOSFET turn-on integrity. |
| 3 VCC | Internal regulator output | Powers internal control circuitry; requires 1.0-μF ceramic cap to GND (not AGND) for adjustable versions. |
| 4 FB | Feedback input | Resistor-divider input for adjustable output; reference voltage = 1.000 V ±1%; sets VOUT = 1.000 × (1 + R1/R2). |
| 5 BIAS | VCC bias source | Connected to output rail; supplies VCC regulator - bypass with 10-nF cap adjacent to pin for stability. |
| 6 RESET | Open-drain fault indicator | Asserts low on UVLO, overtemp, or EN deactivation; requires external pull-up; provides filtered system status. |
| 7 EN | Enable input | Active-high logic; threshold = 1.7–2.0 V rising; hysteresis = 0.4–0.55 V - prevents chatter during slow-rising battery inputs. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-μF ceramic input capacitor directly to GND for transient suppression. |
| 9 SYNC/MODE | Frequency sync & mode select | Configures FPWM (tie high), AUTO (tie low), or external sync (1.9–2.3 MHz); disables spread spectrum when synced. |
| 10 GND | Power ground | Primary return path for VIN, SW, and internal circuits; must be low-impedance and thermally coupled to DAP. |
| DAP | Thermal pad | Exposed copper pad tied exclusively to PCB ground plane - sole purpose is thermal conduction; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated soft-start | 1.3–4.5 ms ramp time - prevents inrush current into downstream capacitors during power-up. |
| Internal current limiting | HS limit = 1.5–2.1 A, LS limit = 1.0–1.43 A - protects against short-circuit and overload without external sensing. |
| Zero-cross detection | Enables diode emulation in AUTO mode - improves light-load efficiency by disabling LS FET conduction. |
| Reset with glitch filtering | 24-µs filter + 4–8 ms release delay - rejects noise-induced false resets while ensuring reliable power-good assertion. |
| UVLO with hysteresis | Rising threshold = 3.2–3.75 V, hysteresis = 0.2–0.35 V - ensures clean startup after battery recovery from cold-crank events. |
| Thermal shutdown protection | Activation at 151–185°C with 10°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Applications
| Automotive Camera Power | ADAS Domain Controller Rail |
|---|---|
|
Use Scenario: Powers CMOS image sensor and ISP in rear-view or surround-view camera modules mounted externally on vehicle body. IC Role / Device Role / Timing Role: Primary 3.3-V or adjustable buck regulator supplying sensor analog front-end and digital core logic. Use Value: 2.1-MHz operation avoids AM-band interference; 1000-mA capability supports dual-sensor configurations; spread spectrum eases EMC testing. |
Use Scenario: Supplies 5-V or adjustable rail to microcontroller, CAN transceiver, and radar preprocessor in centralized ADAS domain controller. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with RESET signaling for system-level power sequencing and fault reporting. Use Value: RESET output replaces discrete supervisor IC; 150°C junction rating supports under-hood placement; low IQ extends battery runtime in parking-mode vision systems. |
| Body Control Module (BCM) | Infotainment Display Backlight |
|
Use Scenario: Generates stable 5-V rail for LIN gateway, door module MCU, and LED driver ICs in automotive body electronics. IC Role / Device Role / Timing Role: Input-tolerant buck converter interfacing directly with vehicle battery; enables single-rail simplification in multi-voltage BCM designs. Use Value: 42-V transient tolerance eliminates need for upstream TVS; SYNC/MODE pin allows synchronization with other SMPS to reduce beat frequencies. |
Use Scenario: Provides adjustable bias voltage (e.g., 4.2 V) to white LED strings in TFT-LCD instrument cluster or center display backlight drivers. IC Role / Device Role / Timing Role: Precision-adjustable constant-voltage source with tight output accuracy (±1.5%) across temperature and load. Use Value: Adjustable FB reference (1.000 V ±1%) enables accurate dimming control; low dropout (0.6 V) preserves headroom at low battery voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53601MQDSXRQ1 | Same functionality but wettable flanks; identical electrical specs and thermal performance. | Preferred for automated optical inspection (AOI) in high-volume SMT lines requiring solder joint verification. | Select LM53601MQDSXRQ1 only if AOI process mandates wettable flank geometry; otherwise LM53601MQUDSXRQ1 offers same reliability with non-wettable flanks. |
| TPS543320RHLR | Higher 3-A output, 2.2-MHz switching, but requires external compensation and lacks integrated RESET. | Suitable for higher-power domain controllers where footprint and component count are secondary to current capacity. | Choose TPS543320RHLR only when >1-A load or programmable loop response is required; LM53601MQUDSXRQ1 provides lower BOM count and faster design cycle for ≤1-A applications. |
Compared with LM53601MQDSXRQ1, LM53601MQUDSXRQ1 trades AOI compatibility for identical electrical behavior in non-inspection-critical builds; versus TPS543320RHLR, it delivers faster time-to-market via internal compensation and integrated RESET, at the cost of lower current headroom.
Availability
LM53601MQUDSXRQ1 is available at Aetrix Electronics and suitable for automotive camera modules, ADAS domain controllers, and body control units requiring stable component supply with AEC-Q100 qualification, extended temperature support, and long-term production continuity.
Supply support for LM53601MQUDSXRQ1 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, embedded processing, and automotive-grade power management solutions, with decades of automotive qualification expertise and broad manufacturing scale.
LM53601MQUDSXRQ1 belongs to TI's automotive-qualified DC/DC converter portfolio, designed specifically for harsh-environment applications including camera, radar, and infotainment subsystems demanding high reliability, low EMI, and extended temperature operation.
FAQ
What is the maximum output current supported by LM53601MQUDSXRQ1?
The LM53601MQUDSXRQ1 supports a maximum recommended output current of 1000 mA under specified thermal conditions. This rating is validated across the full AEC-Q100 Grade 1 ambient temperature range (–40°C to 125°C) and junction temperature range up to 150°C, with appropriate PCB thermal design using the exposed DAP pad.
Does LM53601MQUDSXRQ1 include integrated reset functionality?
Yes, LM53601MQUDSXRQ1 features an open-drain RESET output with built-in glitch filtering (24 µs) and a programmable release delay of 4–8 ms. It asserts low during UVLO, thermal shutdown, or EN deactivation, and provides true power-good indication without requiring external supervisory ICs.
What package type and mounting requirements apply to LM53601MQUDSXRQ1?
LM53601MQUDSXRQ1 uses a 10-pin WSON (DSX) package measuring 3.0 mm × 3.0 mm with non-wettable flanks and an exposed thermal pad (DAP). The DAP must be soldered directly to a solid PCB ground plane for thermal performance; no electrical connection is required or recommended for the DAP.
Can LM53601MQUDSXRQ1 operate with input voltage below 4 V?
Yes, LM53601MQUDSXRQ1 supports a minimum input voltage of 3.55 V after startup and can regulate down to VIN = VOUT + 0.6 V (e.g., 3.9 V for 3.3-V output). Startup requires VIN ≥ 3.6 V due to UVLO rising threshold, but once running, it maintains regulation at lower inputs - critical for cold-crank scenarios.
How does the SYNC/MODE pin configure operating modes on LM53601MQUDSXRQ1?
The SYNC/MODE pin selects three modes: tie high for forced PWM, tie low for AUTO mode with diode emulation at light load, or apply 1.9–2.3 MHz clock for external synchronization. Spread spectrum is disabled during external sync; mode transitions occur within 60–100 µs, enabling dynamic efficiency optimization.
LM53601MQUDSXRQ1 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):
- 3.55V
- 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)
LM53601MQUDSXRQ1 FAQ
1.How can I place an order for LM53601MQUDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53601MQUDSXRQ1 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 LM53601MQUDSXRQ1 reliable?
The price and inventory of LM53601MQUDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53601MQUDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM53601MQUDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53601MQUDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53601MQUDSXRQ1?
LM53601MQUDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53601MQUDSXRQ1 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 LM53601MQUDSXRQ1?
For technical support, including LM53601MQUDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53601MQUDSXRQ1 requirements.
6.How does Aetrix verify that LM53601MQUDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53601MQUDSXRQ1 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 LM53601MQUDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM53601MQUDSXRQ1?
All LM53601MQUDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53601MQUDSXRQ1, 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 LM53601MQUDSXRQ1 part is unused and in its original packaging.
Return procedure for LM53601MQUDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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