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Texas Instruments LM53600AQDSXRQ1
- Part No.:
- LM53600AQDSXRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM53600AQDSXRQ1.pdf
- Description:
- IC REG BUCK ADJ 650MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,701
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Product details
Overview
LM53600AQDSXRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 650 mA at adjustable output voltage, 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.
For engineers reviewing the LM53600AQDSXRQ1 datasheet, LM53600AQDSXRQ1 pinout, LM53600AQDSXRQ1 application, or LM53600AQDSXRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and electrical specs, and real-world implementation guidance for body electronics and ADAS subsystems.
Technical Context
The LM53600AQDSXRQ1 implements peak current mode control with internal compensation, enabling stable regulation across wide VIN (3.55–36 V) and VOUT (3.3–6 V adjustable) 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 ±3% hysteresis, SYNC/MODE pin for external clock synchronization or forced PWM/AUTO mode selection, and thermal shutdown at 151–185°C with 10°C hysteresis - all qualified for –40°C to 150°C junction operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.55 V to 36 V (transient tolerant to 42 V for ≤100 ms); enables direct battery connection without pre-regulator in 12-V automotive systems. |
| Output Current | 650 mA max; sufficient for powering image sensors, SerDes interfaces, and microcontrollers in camera modules. |
| Switching Frequency | 2.1 MHz (±10%); allows use of compact 1–2.2 µH inductors and avoids AM radio interference. |
| Quiescent Current | 23 µA typical; supports always-on functionality in low-power vehicle domains without draining battery. |
| Output Voltage | Adjustable 3.3–6 V via external resistor divider; supports flexible rail generation for diverse SoCs and peripherals. |
| Junction Temperature Range | –40°C to 150°C; meets AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted applications. |
| RESET Output | Open-drain with 4–8 ms delay, ±3% hysteresis, and 50–120 Ω on-resistance; replaces discrete supervisor ICs in safety-critical power sequencing. |
Pinout & Package
LM53600AQDSXRQ1 uses a 10-pin WSON (DSX) package, 3.0 mm × 3.0 mm, with 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 path. |
| 2 BOOT | High-side gate driver supply | Supplies bootstrap capacitor (100 nF) between SW and BOOT; critical for high-side MOSFET turn-on. |
| 3 VCC | Internal 3-V regulator output | Powers internal control circuitry; requires 1-µF ceramic capacitor to AGND (fixed) or GND (adjustable). |
| 4 FB | Feedback input (adjustable version) | Connects to resistor divider from output; sets VOUT = 1 V × (1 + R1/R2); reference voltage = 1.000 V ±1%. |
| 5 BIAS | VCC bias supply (adjustable version) | Connects directly to output node; provides regulated bias for VCC regulator; bypass with 10-nF capacitor. |
| 6 RESET | Open-drain reset output | Asserts low during fault or EN=low; requires external pull-up; indicates valid output after soft-start delay. |
| 7 EN | Enable input | Active-high logic; threshold = 1.7–2.0 V rising; includes 0.4–0.55 V hysteresis; must not be left floating. |
| 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 high → forced PWM; tied 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; connects to thermal pad (DAP) for heat dissipation. |
| DAP | Exposed thermal pad | Electrically connected to GND only; mandatory solder connection to inner/outer ground planes for RθJB = 20.9°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Spread spectrum option | Not enabled in LM53600AQDSXRQ1 (per Device Comparison table); reduces EMI peak emissions by ±4% frequency dither. |
| Internal soft-start | 1.3–4.5 ms ramp time; prevents inrush current and output overshoot during power-up. |
| Pin-selectable PWM mode | SYNC/MODE pin high forces continuous PWM operation; eliminates light-load frequency variation and improves noise predictability. |
| Integrated current limit | High-side limit = 1.0–1.65 A; low-side limit = 0.65–0.93 A; protects against short-circuit and overload without external sensing. |
| UVLO with hysteresis | Starts at 3.2–3.75 V rising; shuts down below 2.9–3.4 V falling; ensures clean power sequencing across cold-crank conditions. |
Applications
| Automotive Camera Power Supply | ADAS Domain Controller Rail |
|---|---|
|
Use Scenario: Powers 3.3-V or 5-V image sensor, ISP, and serializer in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Primary buck regulator providing stable, low-noise, always-on power with RESET signaling for sensor initialization. Use Value: 23 µA IQ enables parking-mode operation; 2.1-MHz switching minimizes EMI near high-speed video links; wettable flanks support automated optical inspection (AOI). |
Use Scenario: Generates intermediate 3.3-V rail for microcontroller, CAN transceiver, and radar preprocessing unit in front-end ADAS ECUs. IC Role / Device Role / Timing Role: High-reliability point-of-load regulator with thermal shutdown and RESET monitoring for functional safety compliance. Use Value: –40°C to 150°C junction rating ensures operation in engine-bay proximity; 42-V transient tolerance handles load-dump events without external TVS. |
| Body Control Module (BCM) Subsystem | Automotive Infotainment Display Backlight |
|
Use Scenario: Supplies 5-V logic rail for door module MCUs, LIN transceivers, and LED drivers in distributed body electronics. IC Role / Device Role / Timing Role: Compact, AEC-Q100-compliant DC/DC converter replacing discrete LDO + switcher combinations. Use Value: Internal compensation reduces BOM count; 3-mm × 3-mm WSON saves PCB area vs. larger SOIC alternatives; RESET output simplifies power-good monitoring. |
Use Scenario: Powers LED driver ICs or analog backlight dimming circuitry in center-stack displays and digital instrument clusters. IC Role / Device Role / Timing Role: Adjustable-output buck regulator enabling precise 3.3–6-V tuning for varying LED forward voltage stacks. Use Value: Adjustable feedback allows single BOM variant across multiple display models; spread-spectrum disable option (as in LM53600AQDSXRQ1) supports deterministic EMI filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53601AQDSXRQ1 | 1-A output capability (vs. 650 mA); identical pinout, package, and feature set except higher current limit and Rdson. | Required where load exceeds 650 mA (e.g., multi-sensor camera modules with integrated ISP). | Select when higher output current is needed without changing layout; shares same footprint and control interface. |
| TPS543B20RTWR | 3-A output, 2.2-MHz switching, integrated FETs, but no AEC-Q100 qualification; requires external compensation. | Suitable for non-safety-critical infotainment subsystems where automotive qualification is not mandated. | Choose for higher current density where AEC-Q100 is not required; verify thermal performance separately due to different RθJA (32°C/W). |
Compared with LM53600AQDSXRQ1, LM53601AQDSXRQ1 offers +538 mA output headroom with zero layout change, while TPS543B20RTWR trades automotive qualification for higher current and flexibility - making LM53600AQDSXRQ1 optimal for cost-sensitive, space-constrained Grade 1 camera rails.
Availability
LM53600AQDSXRQ1 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 LM53600AQDSXRQ1 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.
The LM53600-Q1 product line delivers compact, high-efficiency synchronous buck regulators optimized for automotive camera, ADAS, and body electronics applications demanding AEC-Q100 qualification and extended temperature operation.
FAQ
What is the maximum output current supported by LM53600AQDSXRQ1?
The LM53600AQDSXRQ1 supports a maximum recommended output current of 650 mA. This rating is specified across the full AEC-Q100 Grade 1 ambient temperature range (–40°C to 125°C) and junction temperature range (–40°C to 150°C). Exceeding this current may trigger overcurrent protection or thermal shutdown; derating is required above 125°C junction temperature per TI's thermal metrics (RθJA = 46.2°C/W).
Does LM53600AQDSXRQ1 include spread spectrum modulation?
No, LM53600AQDSXRQ1 does not include spread spectrum modulation. Per the Device Comparison table in the official datasheet (SNAS660D), this specific part number is designated with "No" under the Spread Spectrum column. Spread spectrum is only available in variants ending in 'M' (e.g., LM53600MQDSXRQ1) or 'N'/'L' for fixed-output versions.
What package type and thermal characteristics apply to LM53600AQDSXRQ1?
LM53600AQDSXRQ1 uses a 10-pin WSON (DSX) package measuring 3.0 mm × 3.0 mm with wettable flanks and an exposed thermal pad (DAP). Its thermal resistance is characterized as RθJA = 46.2°C/W (junction-to-ambient), RθJC(bot) = 4.1°C/W (junction-to-case bottom), and RθJB = 20.9°C/W (junction-to-board), requiring direct DAP soldering to a PCB ground plane for reliable operation at full load and high ambient temperatures.
How does the RESET output function on LM53600AQDSXRQ1?
The RESET output on LM53600AQDSXRQ1 is an open-drain signal that goes low during startup until output reaches 92–97% of target voltage, remains low during EN = low or fault conditions, and asserts high after a 4–8 ms delay once regulation is stable. It features built-in glitch filtering (24 µs time constant) and ±3% hysteresis, eliminating need for external supervisory ICs in automotive power sequencing.
Can LM53600AQDSXRQ1 operate from a 3.55-V input?
Yes, LM53600AQDSXRQ1 supports a minimum input voltage of 3.55 V after startup for full functionality at 500-mA load (per Section 7.6), and 3.8 V for full-rated 650-mA load. Startup requires ≥3.6 V (typical UVLO rising threshold), but once running, it sustains regulation down to 3.55 V - enabling compatibility with deep-discharge 12-V battery conditions in automotive stop-start systems.
LM53600AQDSXRQ1 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:
- 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)
LM53600AQDSXRQ1 FAQ
1.How can I place an order for LM53600AQDSXRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53600AQDSXRQ1 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 LM53600AQDSXRQ1 reliable?
The price and inventory of LM53600AQDSXRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53600AQDSXRQ1 is usually 5 days.
3.What payment methods are accepted for LM53600AQDSXRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53600AQDSXRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53600AQDSXRQ1?
LM53600AQDSXRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53600AQDSXRQ1 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 LM53600AQDSXRQ1?
For technical support, including LM53600AQDSXRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53600AQDSXRQ1 requirements.
6.How does Aetrix verify that LM53600AQDSXRQ1 is sourced from the original manufacturer or authorized distributors?
All LM53600AQDSXRQ1 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 LM53600AQDSXRQ1 meets industry standards.
7.What is the process for return or replacement of LM53600AQDSXRQ1?
All LM53600AQDSXRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53600AQDSXRQ1, 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 LM53600AQDSXRQ1 part is unused and in its original packaging.
Return procedure for LM53600AQDSXRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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