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Texas Instruments LM53600LQDSXTQ1
- Part No.:
- LM53600LQDSXTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53600LQDSXTQ1.pdf
- Description:
- IC REG BUCK 5V 650MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:355
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Product details
Overview
LM53600LQDSXTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering a fixed 5-V output at up to 650 mA, operating from 3.55 V to 36 V input with transient tolerance to 42 V, featuring 2.1-MHz fixed switching frequency, 23-µA quiescent current, and integrated RESET with delay and filtering - deployed in automotive camera power rails.
For engineers reviewing the LM53600LQDSXTQ1 datasheet, LM53600LQDSXTQ1 pinout, LM53600LQDSXTQ1 application, or LM53600LQDSXTQ1 equivalent, key selection criteria include its 5-V fixed output, wettable-flank WSON-10 package, spread-spectrum capability, -40°C to 125°C ambient rating, and automotive-grade RESET functionality with 4–8 ms activation delay.
Technical Context
The LM53600LQDSXTQ1 implements peak-current-mode control with internal compensation, enabling stable regulation across wide VIN (3.55–36 V) and load (0–650 mA) ranges while maintaining 2.1-MHz switching. Its architecture supports seamless PWM/PFM transitions and diode emulation in AUTO mode via SYNC/MODE pin configuration.
It integrates a 3-V internal LDO for biasing, open-drain RESET with 92–97% lower threshold and 105–110% upper threshold relative to VOUT, thermal shutdown at 151–185°C, and spread-spectrum modulation (±4% frequency deviation at 30 Hz) to reduce EMI - all qualified per AEC-Q100 with HBM Class 2 and CDM Class C5 ESD ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 5.0 V ±1.5% over temperature and line/load; enables direct powering of MCU I/O, sensors, and interface ICs without external feedback resistors. |
| Max output current | 650 mA continuous; sufficient for single-camera modules, radar transceivers, and body-control microcontrollers in automotive domains. |
| Input voltage range | 3.55 V to 36 V (transient to 42 V for ≤100 ms); eliminates need for upstream pre-regulator or surge protection in 12-V/24-V vehicle systems. |
| Quiescent current | 23 µA typical; maintains battery runtime during vehicle sleep modes without requiring external enable sequencing. |
| Switching frequency | 2.1 MHz nominal (1.89–2.4 MHz range); allows use of compact 1–2.2 µH inductors and avoids AM-band interference. |
| RESET function | Open-drain output with 4–8 ms delay, 92–97% falling / 105–110% rising thresholds; replaces discrete supervisor ICs in safety-critical boot monitoring. |
| Package | 10-pin WSON (3.0 mm × 3.0 mm) with wettable flanks; supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles. |
Pinout & Package
LM53600LQDSXTQ1 uses a 10-pin WSON package (3.0 mm × 3.0 mm) with exposed thermal pad (DAP), rated for –40°C to 125°C ambient operation and 150°C junction temperature. Wettable flanks enable reliable solder-joint inspection per IPC-A-610.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects to inductor; carries high-frequency pulsed current; requires low-inductance layout to minimize EMI and voltage spikes. |
| 2 BOOT | High-side gate driver supply | Supplies floating bias for upper MOSFET; requires 100-nF ceramic capacitor between BOOT and SW pins. |
| 3 VCC | Internal regulator output | 3.05–3.15 V supply for control circuitry; requires 1.0-µF bypass capacitor to AGND (fixed version). |
| 4 FB | Feedback input (5-V fixed) | Direct connection to 5-V output; provides regulation reference; 10-nF bypass required adjacent to pin. |
| 5 AGND | Analog ground reference | Ground return for FB and internal error amplifier; must be routed separately from power ground to avoid noise coupling. |
| 6 RESET | Open-drain status output | Asserts low on fault or EN deactivation; requires external pull-up; delay and hysteresis eliminate false resets during transients. |
| 7 EN | Enable input | Active-high logic; 1.7–2.0 V threshold with 0.4–0.55 V hysteresis; ties directly to VIN or microcontroller GPIO. |
| 8 VIN | Main input supply | Accepts 3.55–36 V; requires local 10-µF ceramic + bulk capacitance; transient-rated to 42 V for load-dump immunity. |
| 9 SYNC/MODE | Mode control & sync input | Configures AUTO (light-load PFM) or forced PWM; accepts external 1.9–2.3 MHz clock; disables spread spectrum when active. |
| 10 GND | Power ground | Primary return path for high-current loops; connects to PCB ground plane under DAP for thermal performance. |
| DAP | Exposed thermal pad | Electrically tied to GND; sole purpose is thermal conduction; must be soldered to solid ground plane for RθJA = 46.2°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±4% frequency deviation at 30 Hz reduces peak EMI by >10 dB, easing CISPR-25 Class 5 compliance without added shielding. |
| Integrated RESET with delay | 4–8 ms activation delay and 24-µs glitch filter prevent spurious resets during startup or brown-out; eliminates external supervisor IC. |
| Pin-selectable PWM/PFM mode | SYNC/MODE pin configures forced PWM (low noise, constant fSW) or AUTO mode (diode emulation, <23 µA IQ at light load). |
| Wide-input, high-transient tolerance | Operates down to 3.55 V input and withstands 42-V transients ≤100 ms, supporting direct battery connection in 12-V/24-V architectures. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient, HBM ±2 kV, CDM ±750 V, and 150°C max junction temperature - meets automotive ASIL-B system requirements. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and serializer in rear-view or surround-view camera modules mounted in exterior locations. IC Role / Device Role / Timing Role: Primary 5-V buck regulator providing clean, low-noise, and transient-robust power with integrated RESET for boot validation. Use Value: Eliminates need for external supervisor and pre-regulator; wettable-flank WSON ensures AOI-compatible assembly for high-reliability automotive production. |
Use Scenario: Supplies 5-V domain for CAN/FlexRay transceivers, watchdog timers, and low-power microcontrollers in ADAS ECUs. IC Role / Device Role / Timing Role: Always-on auxiliary rail with ultra-low 23-µA quiescent current and fast 0.7-ms turn-on delay for rapid system wake-up. Use Value: Maintains system readiness during vehicle sleep; spread-spectrum operation prevents interference with radar and vision processing clocks. |
| Body Control Module (BCM) Interface | Automotive Infotainment Display Backlight |
|
Use Scenario: Delivers regulated 5-V power to LIN transceivers, door module MCUs, and LED drivers in body electronics. IC Role / Device Role / Timing Role: Input-tolerant buck converter handling cold-crank (3.55 V) and load-dump (42 V) events without latch-off. Use Value: Single-chip solution replaces discrete LDO + supervisor + TVS; reduces BOM count and PCB area by >35% vs legacy designs. |
Use Scenario: Powers display timing controller and backlight driver ICs in center-stack infotainment units with variable dimming. IC Role / Device Role / Timing Role: Fixed-output buck stage with precise 5-V accuracy (±1.5%) and soft-start (1.3–4.5 ms) preventing inrush-induced reset. Use Value: Ensures consistent display initialization across temperature; RESET output validates rail stability before GPU/video subsystem enable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53601LQDSXTQ1 | Same 5-V fixed output and spread-spectrum, but rated for 1-A max load and higher current-limit thresholds (1.5–2.1 A HS, 1.0–1.43 A LS). | Suitable where future-proofing for higher current (e.g., dual-sensor cameras) or tighter dropout margin is required. | Select LM53601LQDSXTQ1 only if >650 mA sustained load or lower VIN-to-VOUT differential (<2.0 V) is needed; otherwise LM53600LQDSXTQ1 offers optimal cost/performance for 500-mA-class loads. |
| TPS62130AQDGSRQ1 | 3-V to 17-V input, 3-A output, 2.25-MHz switching, but no spread-spectrum, no integrated RESET, and no 42-V transient rating. | Limited to lower-voltage domains (e.g., infotainment core rails); requires external supervisor and TVS for automotive robustness. | Choose TPS62130AQDGSRQ1 only for non-battery-connected 5-V rails where input stays within 3–17 V and EMI is less critical; LM53600LQDSXTQ1 remains superior for direct-battery applications. |
Compared with LM53601LQDSXTQ1 and TPS62130AQDGSRQ1, LM53600LQDSXTQ1 uniquely combines 42-V transient tolerance, integrated RESET with delay, spread-spectrum EMI reduction, and wettable-flank packaging - making it the most complete single-chip solution for cost-sensitive, space-constrained 5-V automotive camera and BCM rails.
Availability
LM53600LQDSXTQ1 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 LM53600LQDSXTQ1 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 ICs, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.
LM53600LQDSXTQ1 belongs to TI's automotive-qualified buck regulator family designed specifically for demanding 12-V/24-V vehicle systems - emphasizing low IQ, high transient immunity, functional safety features, and AEC-Q100 compliance from design inception.
FAQ
What is the maximum output current supported by LM53600LQDSXTQ1?
The LM53600LQDSXTQ1 supports a maximum continuous output current of 650 mA. This rating is validated across the full AEC-Q100 Grade 1 ambient temperature range (–40°C to +125°C) and accounts for thermal derating at elevated junction temperatures. Exceeding this current may trigger overcurrent protection or thermal shutdown.
Does LM53600LQDSXTQ1 require external feedback resistors for its 5-V output?
No, LM53600LQDSXTQ1 is a fixed 5-V output variant and does not require external feedback resistors. The FB pin is internally connected to the 5-V reference; it must be tied directly to the output node with a 10-nF bypass capacitor placed adjacent to the pin for stability and noise suppression.
How does the RESET output of LM53600LQDSXTQ1 behave during startup?
The LM53600LQDSXTQ1 RESET output remains low for 4–8 ms after EN goes high and regulation is established, then transitions high to indicate valid output. It includes a 24-µs internal glitch filter and hysteresis (92–97% lower / 105–110% upper threshold) to prevent false assertion during input transients or output settling.
Can LM53600LQDSXTQ1 operate with input voltages below 4 V?
Yes, LM53600LQDSXTQ1 supports startup down to 3.55 V and maintains regulation at 3.8 V for full 650-mA load. Below 3.8 V, output current capability decreases progressively; at 3.55 V input, it delivers reduced load while preserving 5-V accuracy - enabling cold-crank operation in 12-V automotive systems.
What is the purpose of the wettable flanks on the LM53600LQDSXTQ1 WSON package?
The wettable flanks on the LM53600LQDSXTQ1's 3-mm × 3-mm WSON package expose solderable metal along the vertical side walls, enabling automated optical inspection (AOI) of solder joint quality - a critical requirement for zero-defect automotive manufacturing and IPC-A-610 compliance verification.
LM53600LQDSXTQ1 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 650mA
- 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)
LM53600LQDSXTQ1 FAQ
1.How can I place an order for LM53600LQDSXTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53600LQDSXTQ1 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 LM53600LQDSXTQ1 reliable?
The price and inventory of LM53600LQDSXTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53600LQDSXTQ1 is usually 5 days.
3.What payment methods are accepted for LM53600LQDSXTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53600LQDSXTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53600LQDSXTQ1?
LM53600LQDSXTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53600LQDSXTQ1 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 LM53600LQDSXTQ1?
For technical support, including LM53600LQDSXTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53600LQDSXTQ1 requirements.
6.How does Aetrix verify that LM53600LQDSXTQ1 is sourced from the original manufacturer or authorized distributors?
All LM53600LQDSXTQ1 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 LM53600LQDSXTQ1 meets industry standards.
7.What is the process for return or replacement of LM53600LQDSXTQ1?
All LM53600LQDSXTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53600LQDSXTQ1, 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 LM53600LQDSXTQ1 part is unused and in its original packaging.
Return procedure for LM53600LQDSXTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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