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Texas Instruments LM53602AQPWPTQ1
- Part No.:
- LM53602AQPWPTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM53602AQPWPTQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:349
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Product details
Overview
LM53602AQPWPTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 2 A at 3.3 V or 5 V from a 3.5–36 V input, featuring 2.1 MHz fixed switching frequency, ±2% output voltage tolerance, and integrated reset with 2–4 ms assertion delay. It serves as the primary power supply for instrument cluster and ADAS domain controllers requiring high transient immunity (42 V surge) and low-noise operation.
For engineers reviewing the LM53602AQPWPTQ1 datasheet, LM53602AQPWPTQ1 pinout, LM53602AQPWPTQ1 application, or LM53602AQPWPTQ1 equivalent, key selection criteria include its 2 A current rating, HTSSOP-16 thermally enhanced package, FPWM mode control, open-drain RESET output with glitch filtering, and automotive-grade thermal range (–40°C to +150°C junction).
Technical Context
The LM53602AQPWPTQ1 uses current-mode control with internal compensation and operates in automatic PFM/PWM transition mode-maintaining 2.1 MHz PWM under heavy load while shifting to diode-emulation PFM at light loads to achieve 24 µA no-load quiescent current. Its valley-current limiting architecture provides robust short-circuit protection with hiccup-mode recovery.
It integrates a 3.15 V internal VCC regulator (supplied via BIAS pin), bootstrap gate drive (CBOOT), and precision reference (1.000 V ±0.7% for ADJ variants). The RESET output tracks output voltage with 94.5–96.5% falling threshold and 105–110% rising threshold, eliminating need for external supervisory ICs in safety-critical automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 36 V DC; withstands 42 V transients ≤500 ms-reduces need for upstream TVS/clamping in 12 V/24 V automotive systems. |
| Output Current | Up to 2 A continuous-supports dual-rail microcontrollers, CAN transceivers, and sensor interfaces in compact ECUs. |
| Switching Frequency | Fixed 2.1 MHz (±12.5%)-enables use of small 1–2.2 µH inductors and avoids AM radio band interference. |
| Output Voltage Accuracy | ±2% over line/load/temperature-ensures reliable logic-level compliance for 3.3 V/5 V digital subsystems. |
| Quiescent Current | 24 µA typical at no load-meets automotive "always-on" low-power requirements without compromising startup time. |
| Shutdown Current | 1.7 µA typical-minimizes battery drain during vehicle sleep mode. |
| Junction Temperature Range | –40°C to +150°C-qualified for under-hood deployment per AEC-Q100 Grade 1. |
Pinout & Package
Package: HTSSOP-16 (PWP), 5.00 mm × 4.40 mm × 1.00 mm, thermally enhanced with exposed die paddle (EP) for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1,2) | Switch node | Connects directly to inductor; pins 1 & 2 must be shorted on PCB to handle high di/dt current paths. |
| CBOOT (3) | Bootstrap supply | Drives high-side MOSFET gate; requires 470 nF ceramic capacitor to SW for stable gate drive. |
| VCC (4) | Internal regulator output | 3.15 V supply for control circuitry; decouple with 3.3 µF X7R capacitor to AGND-no external loading permitted. |
| BIAS (5) | Bias regulator input | Connected to output rail; powers internal LDO-decouple with 0.1 µF capacitor to AGND for noise rejection. |
| SYNC (6) | Frequency sync input | Accepts external clock (1.9–2.3 MHz); tie to GND if unused-prevents EMI skew in multi-regulator systems. |
| FPWM (7) | Mode control | High = forced PWM (constant frequency); Low = auto PFM/PWM-enables deterministic timing for real-time domains. |
| RESET (8) | Open-drain fault flag | Asserts low on undervoltage/fault; includes 12–45 µs glitch filter and 2–4 ms delay-eliminates need for discrete supervisor IC. |
| FB (9) | Feedback input | Direct connection to 3.3 V/5 V output or ADJ divider tap; 10 nA bias current enables high-impedance sensing. |
| AGND (10) | Analog ground | Reference for feedback, error amp, and internal circuits; connect to EP and PGND at single point to minimize noise coupling. |
| EN (11) | Enable input | Logic-high ≥2 V enables regulation; ≤0.8 V forces full shutdown-supports ignition-controlled power sequencing. |
| VIN (12,13) | Main input supply | 3.5–36 V input; pins 12 & 13 must be shorted on PCB and bypassed with low-ESR capacitors near PGND. |
| N/C (14) | No connect | Internally unconnected-leave unpopulated or float; no PCB trace required. |
| PGND (15,16) | Power ground | Return path for low-side MOSFET and input/output capacitors; short pins 15 & 16 and tie to AGND/EP at star ground. |
| EP (17) | Exposed paddle | Thermal and electrical ground; must be soldered to large copper pour for thermal dissipation (RθJB = 16.2°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2500 V (I/O pins) and CDM ±750 V-meets automotive reliability standards. |
| Integrated RESET with tracking thresholds | 94.5–96.5% falling / 105–110% rising thresholds referenced to actual VOUT-provides tighter system-level power-good accuracy than discrete supervisors. |
| Automatic PFM/PWM transition | Reduces no-load IQ to 24 µA while maintaining fast transient response-optimizes efficiency across 10 µA–2 A load range without external mode control. |
| Valley-current limiting with hiccup recovery | ILS = 2.0–2.8 A (typical) with 5.5 ms hiccup interval-protects against sustained overload without thermal runaway or latch-off. |
| Thermally optimized HTSSOP-16 package | RθJA = 42.5°C/W on 4-layer JEDEC board; EP pad enables >1.5 W power dissipation in compact layouts-supports high-density automotive PCBs. |
Applications
| Instrument Cluster Power Supply | ADAS Camera Module Rail |
|---|---|
Use Scenario: Powers LCD driver, microcontroller, and backlight LED controller in digital instrument clusters exposed to wide temperature swings and battery transients. IC Role / Device Role / Timing Role: Primary 5 V/2 A buck regulator with integrated RESET for MCU boot validation and brown-out detection. Use Value: Eliminates external supervisor and reduces BOM count by 2 components; 42 V surge tolerance avoids need for pre-regulator clamping. | Use Scenario: Supplies 3.3 V to image sensor, ISP, and MIPI interface in forward-facing camera modules operating near engine compartments. IC Role / Device Role / Timing Role: High-efficiency 3.3 V/2 A step-down converter with FPWM mode enabled for deterministic EMI profile during video streaming. Use Value: 2.1 MHz switching allows <2.2 µH inductor size; 24 µA quiescent current meets ISO 16750-2 sleep-mode leakage limits. |
| Infotainment System Core Logic | HUD Display Controller Power |
Use Scenario: Generates stable 3.3 V for application processor I/O, audio codec, and USB PHY in head-unit designs with variable input voltage (9–16 V). IC Role / Device Role / Timing Role: Main system rail regulator with SYNC input synchronized to SoC clock to minimize beat-frequency EMI. Use Value: Synchronization eliminates heterodyne noise in sensitive analog audio sections; ±2% accuracy ensures reliable DDR I/O voltage margin. | Use Scenario: Provides regulated 5 V to DMD controller and laser driver in augmented reality HUD units mounted on windshield. IC Role / Device Role / Timing Role: Compact 5 V/2 A power stage with thermal shutdown (162–178°C) and low EMI for space-constrained optical assemblies. Use Value: HTSSOP-16 footprint fits within 8 mm × 7 mm area; RθJC(bot) = 1.1°C/W enables direct thermal coupling to metal housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53603AQPWPTQ1 | 3 A output capability; identical pinout, package, and feature set-higher current rating with same footprint and control interface. | Suitable for higher-power infotainment processors or multi-sensor fusion ECUs where 2 A is insufficient. | Select when peak load exceeds 1.8 A or future-proofing for higher-current derivatives is required. |
| TPS54240QDGQRQ1 | Adjustable 0.8–28 V output; 2.5 A rating; 3.5–40 V input; but fixed 570 kHz frequency and no integrated RESET output. | Used where programmable output voltage or wider VIN range is needed, but adds external supervisor for power-good signaling. | Choose when design flexibility outweighs integration benefits-requires additional BOM and layout effort for RESET functionality. |
Compared with LM53603AQPWPTQ1, the LM53602AQPWPTQ1 offers lower cost and thermal margin for 2 A applications; versus TPS54240QDGQRQ1, it delivers superior integration (RESET, FPWM, SYNC) and higher frequency for smaller magnetics-but lacks adjustable output voltage.
Availability
LM53602AQPWPTQ1 is available at Aetrix Electronics and suitable for automotive instrument cluster, ADAS camera module, and infotainment system designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM53602AQPWPTQ1 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 electronics with decades of automotive qualification expertise.
The LM5360x-Q1 product line delivers high-reliability, wide-input synchronous buck regulators optimized for automotive power rails-designed to replace discrete DC/DC solutions in safety-critical ECU applications.
FAQ
What is the maximum input voltage transient the LM53602AQPWPTQ1 can withstand?
The LM53602AQPWPTQ1 sustains 42 V transients at the VIN pin for up to 500 ms with ≤0.01% duty cycle, per AEC-Q100 stress testing. This allows direct connection to automotive battery rails without external transient suppression in most 12 V systems. Operation above 36 V is limited to transient conditions only-continuous operation must remain within 3.5–36 V.
Does the LM53602AQPWPTQ1 require external feedback resistors for 5 V output?
No, the LM53602AQPWPTQ1 does not require external feedback resistors for 5 V or 3.3 V fixed-output versions-the FB pin is internally connected to a precision voltage divider. Only the ADJ variant requires external resistor network to set output voltage between 3.3 V and 6 V. This simplifies layout and improves accuracy by eliminating resistor tolerance errors.
How does the RESET output of the LM53602AQPWPTQ1 differ from standard power-good signals?
The LM53602AQPWPTQ1 RESET output features voltage-tracking thresholds (94.5–96.5% falling, 105–110% rising) referenced to actual VOUT-not a fixed voltage-plus 12–45 µs glitch filtering and 2–4 ms assertion delay. This eliminates false triggers during transients and provides tighter system-level accuracy than discrete supervisors, making LM53602AQPWPTQ1 suitable for ASIL-B functional safety paths.
Can the LM53602AQPWPTQ1 operate with input voltage below 3.5 V?
No-the LM53602AQPWPTQ1 has a minimum operating input voltage of 3.5 V (rising) and 3.2 V (falling with hysteresis). Below this, the device will not start or will shut down. For 3.3 V output, the minimum input to maintain regulation is 3.9 V at full load-so it cannot bootstrap from a discharged 3.6 V LiFePO₄ battery without pre-biasing.
What thermal derating applies to the LM53602AQPWPTQ1 at 125°C ambient?
At 125°C ambient, the LM53602AQPWPTQ1 junction temperature must stay ≤150°C. With RθJA = 42.5°C/W, maximum allowable power dissipation drops to ~0.59 W-limiting continuous 2 A output to cases with significant airflow or enhanced copper pours. Derating curves in the datasheet show 1.5 A max at 125°C ambient on standard 4-layer board; use EP thermal vias and ground plane to improve performance.
LM53602AQPWPTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- 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):
- 3.9V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM53602AQPWPTQ1 FAQ
1.How can I place an order for LM53602AQPWPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53602AQPWPTQ1 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 LM53602AQPWPTQ1 reliable?
The price and inventory of LM53602AQPWPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53602AQPWPTQ1 is usually 5 days.
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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 LM53602AQPWPTQ1?
For technical support, including LM53602AQPWPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53602AQPWPTQ1 requirements.
6.How does Aetrix verify that LM53602AQPWPTQ1 is sourced from the original manufacturer or authorized distributors?
All LM53602AQPWPTQ1 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 LM53602AQPWPTQ1 meets industry standards.
7.What is the process for return or replacement of LM53602AQPWPTQ1?
All LM53602AQPWPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM53602AQPWPTQ1, 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 LM53602AQPWPTQ1 part is unused and in its original packaging.
Return procedure for LM53602AQPWPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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