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Texas Instruments LM536025QPWPRQ1
- Part No.:
- LM536025QPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM536025QPWPRQ1.pdf
- Description:
- IC REG BUCK 5V 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,377
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Product details
Overview
LM536025QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 2 A at 5 V or 3.3 V from 3.5 V–36 V input, featuring 2.1 MHz fixed switching frequency, ±2% output voltage tolerance, and integrated reset with 2 ms assertion delay. It operates in navigation/GPS power rails where compact size and transient robustness are critical.
For engineers reviewing the LM536025QPWPRQ1 datasheet, LM536025QPWPRQ1 pinout, LM536025QPWPRQ1 application, or LM536025QPWPRQ1 equivalent, key selection criteria include its 2 A load capability, 1.7 µA shutdown current, FPWM mode control, open-drain RESET output with glitch filtering, and HTSSOP-16 thermal performance under –40°C to +125°C ambient conditions.
Technical Context
The LM536025QPWPRQ1 implements current-mode control with automatic PWM/PFM transition and user-selectable forced PWM (FPWM) via dedicated logic input. Its oscillator supports external synchronization (SYNC pin) and reduces frequency above ~20 V input to maintain regulation during battery transients.
It integrates a 3.15 V internal VCC regulator, BIAS pin for output-voltage-referenced biasing, bootstrap gate drive (CBOOT), and thermally enhanced HTSSOP package with exposed paddle. The RESET function shares the same reference as the feedback loop, enabling 96.5% falling threshold tracking actual VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A maximum continuous - supports instrument cluster and HUD subsystems without external current boosting. |
| Input Voltage Range | 3.5 V to 36 V - accommodates cold-crank (≥3.5 V) and load-dump (transient-tolerant to 42 V/500 ms) automotive battery conditions. |
| Switching Frequency | 2.1 MHz nominal - enables use of small external inductors (e.g., 1.5 µH) and avoids AM radio band interference. |
| Output Voltage Options | Fixed 5 V or 3.3 V - eliminates external feedback divider, reducing BOM count and layout sensitivity. |
| Shutdown Current | 1.7 µA typical - preserves battery life in always-on vehicle modules such as telematics wake-up circuits. |
| RESET Output | Open-drain with 2–4 ms assertion delay and 12–45 µs glitch filter - replaces discrete supervisor ICs in safety-critical ADAS power sequencing. |
| Junction Temperature Range | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard-mounted ECUs. |
Pinout & Package
LM536025QPWPRQ1 uses a thermally enhanced 16-pin HTSSOP package (5.00 mm × 4.40 mm × 1.00 mm) with exposed die attach paddle (EP) for PCB-level heat sinking and noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1,2) | Switch node | Connects directly to inductor; pins 1 and 2 must be shorted on PCB for low-inductance high-current path. |
| 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 (e.g., 5 V); supplies internal bias with 0.1 µF decoupling - improves light-load efficiency. |
| SYNC (6) | Frequency sync input | Accepts external clock (1.9–2.3 MHz); tie to GND if unused - prevents EMI coupling from floating node. |
| FPWM (7) | Forced PWM mode control | High = fixed-frequency PWM; Low = auto PFM/PWM transition - enables deterministic EMI profile in noise-sensitive infotainment. |
| RESET (8) | Open-drain power-good flag | Asserts high after 2–4 ms when VOUT reaches 94–96.5% of setpoint; requires external pull-up resistor (e.g., 10 kΩ to VOUT). |
| FB (9) | Feedback input | Direct connection to 5 V or 3.3 V output; no external divider needed - simplifies layout and improves stability. |
| AGND (10) | Analog ground reference | Reference for FB, EN, FPWM, SYNC; connect to EP and PGND at single-point star ground to minimize noise coupling. |
| EN (11) | Enable input | Logic-high ≥2 V enables regulation; ≤0.8 V forces full shutdown - supports microcontroller-controlled power sequencing. |
| VIN (12,13) | Main input supply | 3.5–36 V input; pins 12 and 13 must be shorted on PCB and bypassed with low-ESR capacitor(s) to PGND. |
| N/C (14) | No connection | Internally unconnected - leave unpopulated or float; do not route traces or apply solder mask opening. |
| PGND (15,16) | Power ground return | Low-side MOSFET source return; connect to AGND and system ground plane with wide copper pour for thermal and EMI performance. |
| EP (17) | Exposed thermal pad | Must be soldered to solid ground plane - provides primary thermal path (RθJC(bot) = 1.1 °C/W) and reduces EMI radiation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RESET with tracking threshold | Uses shared reference to achieve ±0.5% relative accuracy between regulation and reset assertion - eliminates need for external supervisor IC. |
| Automatic light-load PFM mode | Reduces no-load input current to 24 µA while maintaining fast transient response - extends battery runtime in parked vehicle modes. |
| Thermally optimized HTSSOP-16 | RθJA = 42.5 °C/W on 4-layer JEDEC board - enables 2 A operation at +85°C ambient without heatsink in typical automotive PCB layouts. |
| Built-in soft-start and compensation | 2 ms internal soft-start prevents output overshoot; fully compensated design removes requirement for external loop components. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient, HBM ±2500 V (I/O pins), CDM ±750 V - certified for front-end ADAS camera and radar modules. |
Applications
| Navigation/GPS Module Power | Instrument Cluster Display Supply |
|---|---|
Use Scenario: Powers GPS baseband processor and RF front-end in automotive head units under cold-crank (≤6 V) and load-dump (≥40 V) conditions. IC Role / Device Role / Timing Role: Primary 5 V/2 A DC-DC regulator with integrated RESET for safe boot sequencing and brown-out detection. Use Value: Eliminates external supervisor and reduces solution size by 35% vs. discrete buck + supervisor approach. |
Use Scenario: Supplies TFT-LCD backlight driver and microcontroller in digital instrument clusters exposed to under-dash temperatures up to +105°C. IC Role / Device Role / Timing Role: Fixed 3.3 V/2 A step-down converter with FPWM mode enabled to suppress audible coil whine during speedometer updates. Use Value: Maintains <±2% output regulation across temperature and line variations, ensuring consistent display brightness and MCU timing margin. |
| ADAS Camera Power Rail | HUD Projection Unit Supply |
Use Scenario: Provides clean 3.3 V power to CMOS image sensor and ISP in forward-facing ADAS cameras mounted behind windshield. IC Role / Device Role / Timing Role: Automotive-grade buck regulator with 125°C junction rating and 42 V transient tolerance for engine-bay proximity. Use Value: Survives 42 V/500 ms transients without latch-off, avoiding camera blackout during alternator load dump events. |
Use Scenario: Delivers regulated 5 V to DLP or LCoS microdisplay controller and LED driver in head-up display systems requiring low EMI. IC Role / Device Role / Timing Role: 2.1 MHz fixed-frequency converter synchronized to system clock (via SYNC pin) to shift switching noise out of sensitive video bands. Use Value: Enables EMI-compliant layout with <10 mm inductor placement - critical for compact HUD optical engine integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53603QPWPRQ1 | 3 A output current; higher valley current limit (3.0–4.3 A vs. 2.0–2.8 A); identical pinout and feature set. | Required where peak load exceeds 2 A (e.g., multi-sensor fusion ECUs); same PCB layout but higher thermal margin. | Select LM53603QPWPRQ1 when >2 A continuous load or higher short-circuit robustness is required; otherwise LM536025QPWPRQ1 offers optimal cost/size tradeoff. |
| TPS54360BQDDAQ1 | 3.5–60 V input; 3.5 A output; adjustable frequency (100 kHz–2.5 MHz); no integrated RESET; larger SOIC-8 package. | Suitable for wider VIN applications (e.g., commercial truck 24 V systems); lacks built-in power-good flag and requires external supervision. | Choose TPS54360BQDDAQ1 only when input exceeds 36 V or when programmable frequency is mandatory; LM536025QPWPRQ1 provides superior integration for standard 12 V automotive platforms. |
Compared with LM53603QPWPRQ1, LM536025QPWPRQ1 delivers optimized thermal performance at 2 A with identical footprint and features, while TPS54360BQDDAQ1 trades integration for extended input range and flexibility - making LM536025QPWPRQ1 the preferred choice for cost-sensitive, space-constrained 12 V ADAS and infotainment subsystems.
Availability
LM536025QPWPRQ1 is available at Aetrix Electronics and suitable for automotive navigation/GPS, instrument cluster, ADAS camera, and HUD projection applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM536025QPWPRQ1 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.
The LM5360x-Q1 product line was designed specifically for automotive power conversion - emphasizing AEC-Q100 Grade 1 reliability, 42 V transient tolerance, integrated supervision, and thermally efficient packaging for under-hood and dashboard environments.
FAQ
What is the maximum input voltage transient tolerance for LM536025QPWPRQ1?
The LM536025QPWPRQ1 withstands input transients up to 42 V for durations ≤500 ms at ≤0.01% duty cycle, per AEC-Q100 stress testing. This allows direct connection to automotive battery rails without additional transient voltage suppression in most passenger vehicle designs. The device remains functional during load-dump events common in 12 V systems, and the internal protection circuitry prevents latch-up or damage under these conditions. Always verify system-level surge protection per ISO 7637-2 for full compliance.
Does LM536025QPWPRQ1 require external feedback resistors for 5 V output?
No, LM536025QPWPRQ1 does not require external feedback resistors for 5 V output - it integrates an internal resistor divider optimized for 5 V regulation. The FB pin connects directly to the output node, eliminating BOM items, layout sensitivity, and potential drift errors associated with external dividers. This also improves load regulation accuracy and simplifies validation. For adjustable (ADJ) versions, external resistors are required, but LM536025QPWPRQ1 is factory-configured for fixed 5 V operation.
How does the RESET function behave during enable/disable transitions in LM536025QPWPRQ1?
In LM536025QPWPRQ1, the RESET output goes low immediately when EN is pulled below 0.8 V (shutdown threshold), providing synchronous fault indication. When EN rises above 2 V, RESET remains low for 2–4 ms (TRESET-act) after VOUT reaches 94–96.5% of regulation before asserting high. During this delay, the output is actively filtered against glitches <12–45 µs (TRESET-filter). RESET remains valid down to VIN ≥1.5 V even with EN low - enabling reliable power-status monitoring during brown-out conditions.
Can LM536025QPWPRQ1 operate in forced PWM mode across all loads?
Yes, LM536025QPWPRQ1 supports forced PWM (FPWM) mode via the FPWM pin: driving it high locks the regulator into constant 2.1 MHz switching regardless of load, eliminating frequency variation and associated EMI spread. This is essential in noise-sensitive applications like infotainment audio paths or camera sensor interfaces. In auto mode (FPWM low), it transitions seamlessly between PWM and PFM to maximize light-load efficiency - achieving 24 µA no-load input current.
What thermal performance can be expected from LM536025QPWPRQ1 in a standard 4-layer PCB?
On a standard 4-layer JEDEC test board, LM536025QPWPRQ1 exhibits RθJA = 42.5 °C/W and RθJC(bot) = 1.1 °C/W. With proper thermal land design - including soldered EP pad connected to ≥2 in² internal ground plane - it sustains 2 A continuous output at +85°C ambient without derating. Junction temperature remains below 125°C under worst-case 36 V input and full load, meeting AEC-Q100 Grade 1 requirements. Thermal simulation using TI's WEBENCH® is recommended for application-specific layout validation.
LM536025QPWPRQ1 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.9V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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
LM536025QPWPRQ1 FAQ
1.How can I place an order for LM536025QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM536025QPWPRQ1 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 LM536025QPWPRQ1 reliable?
The price and inventory of LM536025QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM536025QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for LM536025QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM536025QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM536025QPWPRQ1?
LM536025QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM536025QPWPRQ1 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 LM536025QPWPRQ1?
For technical support, including LM536025QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM536025QPWPRQ1 requirements.
6.How does Aetrix verify that LM536025QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All LM536025QPWPRQ1 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 LM536025QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of LM536025QPWPRQ1?
All LM536025QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM536025QPWPRQ1, 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 LM536025QPWPRQ1 part is unused and in its original packaging.
Return procedure for LM536025QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM536025QPWPRQ1 Tags
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