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Texas Instruments LM536025QPWPTQ1
- Part No.:
- LM536025QPWPTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM536025QPWPTQ1.pdf
- Description:
- IC REG BUCK 5V 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:769
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Product details
Overview
LM536025QPWPTQ1 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 serves as primary power supply for infotainment domain controllers requiring high transient immunity and compact layout.
For engineers reviewing the LM536025QPWPTQ1 datasheet, LM536025QPWPTQ1 pinout, LM536025QPWPTQ1 application, or LM536025QPWPTQ1 equivalent, key selection criteria include its 2 A current rating, HTSSOP-16 thermal performance (RθJA = 42.5°C/W), forced PWM mode support, and automotive-grade ESD ratings (HBM ±2500 V on EN/FB/RESET).
Technical Context
The LM536025QPWPTQ1 implements current-mode control with valley-current limiting and automatic PFM/PWM transition. Its oscillator supports external synchronization (1.9–2.3 MHz) and reduces frequency under high VIN (>20 V) to maintain regulation.
It integrates internal 3.15 V VCC regulator, BIAS pin for output-sourced biasing, and open-drain RESET with glitch filtering (12–45 µs) and 2–4 ms activation delay-enabling system-level power sequencing without external supervisors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 36 V DC; withstands 42 V transients ≤500 ms - simplifies front-end surge protection in 12 V/24 V automotive systems. |
| Output Current | 2 A maximum continuous - matches load requirements of mid-tier ADAS camera modules and HUD display drivers. |
| Switching Frequency | 2.1 MHz nominal (1.85–2.35 MHz range); synchronizable to 1.9–2.3 MHz - enables use of small 1–2.2 µH inductors and avoids AM radio band. |
| Output Voltage Options | Fixed 5 V or 3.3 V; no external feedback divider required - reduces BOM count and layout area for standard logic rails. |
| Quiescent Current | 24 µA typical at no load - sustains >10-year battery standby life in always-on vehicle modules. |
| Shutdown Current | 1.7 µA typical - meets ISO 16750-2 cold-cranking and sleep-mode leakage requirements. |
| Reset Accuracy | ±2.5% threshold tracking (94.5–110% of VOUT) with 2–4 ms delay - provides reliable power-good signaling without external supervisor IC. |
Pinout & Package
Package: HTSSOP-16 (5.00 mm × 4.40 mm × 1.00 mm) with exposed thermal pad (EP). Thermally enhanced for automotive under-hood operation; RθJC(bot) = 1.1°C/W enables direct PCB copper pour 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 minimize loop inductance and EMI. |
| CBOOT (3) | Bootstrap supply | Requires 470 nF X7R capacitor to SW; enables high-side NMOS gate drive above VIN. |
| VCC (4) | Internal regulator output | 3.15 V supply for control circuitry; decouple with 3.3 µF ceramic to AGND - not for external loading. |
| BIAS (5) | Bias input | Connected to VOUT; powers internal regulators with 0.1 µF local decoupling - improves light-load efficiency. |
| SYNC (6) | Frequency sync input | Accepts 1.9–2.3 MHz external clock; tie to GND if unused - prevents noise coupling into oscillator. |
| FPWM (7) | Mode control | High = forced PWM (constant fSW); Low = auto PFM/PWM - selectable for EMI-sensitive or efficiency-critical applications. |
| RESET (8) | Open-drain fault flag | Asserts low on undervoltage/fault; requires external pull-up; remains valid down to VIN ≥1.5 V - replaces discrete supervisor IC. |
| FB (9) | Feedback input | Internally connected to 5 V/3.3 V divider; for ADJ version only - connects to resistor divider tap point. |
| AGND (10) | Analog ground | Reference for FB, EN, FPWM, SYNC; connect to EP and PGND at single point - critical for noise immunity. |
| EN (11) | Enable input | Active-high; 2 V threshold rising, 0.8 V falling - supports direct connection to microcontroller GPIO or battery rail. |
| VIN (12,13) | Main input supply | 3.5–36 V input; pins 12 & 13 must be shorted on PCB - handles dual-path routing for high-current delivery. |
| N/C (14) | No connect | Unbonded pin - leave unconnected; do not route or place copper. |
| PGND (15,16) | Power ground | Low-side MOSFET source return; connect to AGND and system GND at EP - minimizes ground bounce during switching. |
| EP (17) | Exposed paddle | Thermal and electrical ground; must be soldered to large PCB copper area - essential for RθJC = 1.1°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient), HBM ±2500 V on EN/FB/RESET - certified for engine bay and dashboard deployment. |
| Integrated reset function | Glitch-filtered (12–45 µs), delayed (2–4 ms), and output-voltage-tracked thresholds - eliminates need for external supervisor IC and saves 3–4 mm² board space. |
| Light-load efficiency | 24 µA no-load input current with automatic PFM mode - extends battery life in parked vehicle scenarios without compromising transient response. |
| Thermally optimized package | HTSSOP-16 with exposed paddle and RθJC(bot) = 1.1°C/W - enables 2 A operation at +105°C ambient without heatsink in typical 4-layer PCB layout. |
| Robust protection suite | Valley current limit (2.0–2.8 A), thermal shutdown (162–178°C), UVLO, and hiccup-mode short-circuit recovery - ensures safe operation during load faults and cold cranking. |
Applications
| Navigation/GPS Module Power | Instrument Cluster Display Supply |
|---|---|
Use Scenario: Powers GPS baseband processor, RF front-end, and memory in automotive navigation units operating across battery voltage swings (6–16 V) and temperature extremes. IC Role / Device Role / Timing Role: Primary 5 V/2 A DC-DC converter regulating main logic rail; provides clean, stable output with fast line/load transient response (<10 µs). Use Value: 2.1 MHz switching enables compact 1.5 µH inductor and 22 µF output capacitance - reduces total solution size by 35% vs. 500 kHz alternatives. | Use Scenario: Supplies 3.3 V to TFT LCD controller, touch interface MCU, and backlight driver in digital instrument clusters with strict EMI limits. IC Role / Device Role / Timing Role: Fixed 3.3 V buck regulator with FPWM mode enabled to suppress switching frequency harmonics in AM radio band (530–1710 kHz). Use Value: Forced PWM eliminates variable-frequency PFM noise; ±2% output tolerance ensures consistent display brightness and timing margin for SPI interfaces. |
| ADAS Camera Sensor Bias | HUD Projection Unit Power |
Use Scenario: Delivers regulated 5 V to CMOS image sensor, ISP, and serializer in forward-facing ADAS cameras exposed to under-hood thermal stress. IC Role / Device Role / Timing Role: High-reliability 5 V/2 A power stage with thermal shutdown (162°C) and 42 V transient tolerance - survives load dump events per ISO 7637-2. Use Value: Integrated BIAS pin sourcing from VOUT improves light-load efficiency by 12% vs. external bias supplies - extends operational uptime during low-power vision processing modes. | Use Scenario: Generates 5 V for DLP or LCoS microdisplay controller and LED driver in head-up displays requiring ultra-low noise and precise voltage accuracy. IC Role / Device Role / Timing Role: Primary 5 V regulator with ±2% output tolerance and 7 mV line regulation - maintains stable pixel clock reference and analog bias voltages. Use Value: Built-in soft-start (1–3 ms) prevents inrush current spikes that could disrupt sensitive optical alignment circuits during power-up sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53603QPWPTQ1 | 3 A output current; higher peak/valley current limits (4.5/3.6 A vs. 4.4/2.8 A); identical pinout and features | Supports higher-power ADAS ECUs and radar processors requiring >2 A sustained load | Select when system peak current exceeds 2 A or future-proofing for higher-power derivatives is needed. |
| TPS543320RTWR | 3 A, 4.5–18 V input, 2.2 MHz, integrated FETs and compensation; QFN-18 package (3.5 × 4.5 mm) | Lacks automotive qualification (AEC-Q100 Grade 2 only); no integrated RESET; smaller footprint but lower thermal capability | Consider for non-safety-critical infotainment subsystems where size is constrained and qualification is not mandated. |
Compared with LM53603QPWPTQ1, the LM536025QPWPTQ1 trades 1 A output capacity for tighter thermal design margins in HTSSOP-16; versus TPS543320RTWR, it delivers certified automotive reliability and integrated power-good signaling at the cost of slightly larger footprint.
Availability
LM536025QPWPTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM536025QPWPTQ1 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 ICs, with over 40 years of automotive qualification expertise and AEC-Q100-compliant manufacturing.
The LM5360x-Q1 product line was designed specifically for automotive power conversion in harsh environments - targeting navigation, cluster, ADAS, and HUD systems requiring high VIN range, transient robustness, and functional safety-aware features.
FAQ
What is the maximum input voltage the LM536025QPWPTQ1 can withstand without damage?
The LM536025QPWPTQ1 has an absolute maximum VIN rating of 40 V DC, and can sustain 42 V transients for ≤500 ms at ≤0.01% duty cycle. This meets ISO 7637-2 Pulse 5a load-dump requirements for 12 V automotive systems. Operation above 36 V is not recommended for continuous use, as switching frequency drops below 1.2 MHz and regulation margin decreases.
Does the LM536025QPWPTQ1 require external feedback resistors for 5 V output?
No, the LM536025QPWPTQ1 does not require external feedback resistors for 5 V or 3.3 V fixed-output versions. Internal resistor dividers set the feedback reference; the FB pin is internally connected and must not be left floating or grounded. External resistors are only needed for the ADJ variant to program output between 3.3 V and 6 V.
How does the RESET pin on the LM536025QPWPTQ1 behave during enable/disable transitions?
When EN is pulled low, the LM536025QPWPTQ1 forces RESET low regardless of output voltage status. RESET remains valid (can assert low on fault) as long as VIN ≥1.5 V. Upon EN rising above 2 V, RESET asserts high only after VOUT reaches regulation and the 2–4 ms delay (TRESET-act) expires - preventing false power-good signals during startup overshoot.
Can the LM536025QPWPTQ1 operate with input voltage below 3.5 V?
No - the LM536025QPWPTQ1 has a minimum operating input voltage of 3.5 V (3.95 V typical start-up). Below this, the device will not initiate switching or regulate output. For 3.3 V output, the minimum input to maintain regulation is 3.9 V at full 2 A load, per system characterization data. Input below 3.5 V results in UVLO shutdown.
What is the purpose of the BIAS pin on the LM536025QPWPTQ1, and how should it be connected?
The BIAS pin on the LM536025QPWPTQ1 supplies the internal bias regulator and improves light-load efficiency by sourcing current from the output rail instead of VIN. It must be connected directly to the VOUT node (not GND or VIN) and decoupled with a 0.1 µF X7R ceramic capacitor to AGND. Floating or grounding BIAS disables this efficiency enhancement and may cause instability.
LM536025QPWPTQ1 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
LM536025QPWPTQ1 FAQ
1.How can I place an order for LM536025QPWPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM536025QPWPTQ1 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 LM536025QPWPTQ1 reliable?
The price and inventory of LM536025QPWPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM536025QPWPTQ1 is usually 5 days.
3.What payment methods are accepted for LM536025QPWPTQ1?
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4.How is shipping managed for LM536025QPWPTQ1?
LM536025QPWPTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM536025QPWPTQ1 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 LM536025QPWPTQ1?
For technical support, including LM536025QPWPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM536025QPWPTQ1 requirements.
6.How does Aetrix verify that LM536025QPWPTQ1 is sourced from the original manufacturer or authorized distributors?
All LM536025QPWPTQ1 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 LM536025QPWPTQ1 meets industry standards.
7.What is the process for return or replacement of LM536025QPWPTQ1?
All LM536025QPWPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM536025QPWPTQ1, 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 LM536025QPWPTQ1 part is unused and in its original packaging.
Return procedure for LM536025QPWPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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