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Texas Instruments LM46002AQPWPRQ1
- Part No.:
- LM46002AQPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM46002AQPWPRQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,999
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Product details
Overview
LM46002AQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified synchronous step-down DC-DC converter delivering up to 2 A output current with input voltage range 3.5 V to 60 V, 27 µA quiescent current in regulation, and integrated power-good flag - used in 12-V/24-V automotive sub-AM band power supplies.
For engineers reviewing the LM46002AQPWPRQ1 datasheet, LM46002AQPWPRQ1 pinout, LM46002AQPWPRQ1 application, or LM46002AQPWPRQ1 equivalent, key selection criteria include wide VIN operation under cold-crank conditions, PFM/DCM light-load efficiency, EN-controlled UVLO programming, and EMI-compliant layout support per EN55022 Class B.
Technical Context
The LM46002AQPWPRQ1 uses peak-current-mode control with internal compensation, enabling stable operation across ceramic, polymer, tantalum, and aluminum output capacitors without external loop tuning. Its architecture integrates high-side (210 mΩ) and low-side (110 mΩ) MOSFETs, a precision 1.011 V feedback reference, and hiccup-mode short-circuit protection.
It supports frequency adjustment from 200 kHz to 2.2 MHz via RT pin resistor, synchronization to external clock (SYNC), soft-start/tracking (SS/TRK), and bias rail optimization via BIAS pin connection to VOUT or external 3.3/5 V supply - all while maintaining AEC-Q100 Grade 1 thermal performance (–40°C to +125°C ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - supports automotive cold-crank (≥3.5 V start-up) and load-dump transients up to 65 V absolute max. |
| Output Current | Up to 2 A continuous - enables single-chip point-of-load conversion for microcontrollers, sensors, and infotainment subsystems. |
| Quiescent Current | 27 µA in regulation - extends battery runtime in always-on automotive modules (e.g., body control units). |
| Switching Frequency | 200 kHz to 2.2 MHz adjustable - allows EMI optimization and inductor size reduction; default 500 kHz. |
| Feedback Reference | 1.011 V ±1.2% over –40°C to +125°C - ensures ±1% output accuracy with standard resistor dividers. |
| Power-Good Flag | Open-drain PGOOD with 80–113% FB threshold hysteresis - provides reliable system power sequencing and fault detection. |
| Thermal Protection | 160°C shutdown / 150°C recovery - safeguards against sustained overload or poor PCB heatsinking in confined enclosures. |
Pinout & Package
LM46002AQPWPRQ1 is housed in a thermally enhanced 16-pin HTSSOP (PWP) package (6.6 mm × 5.1 mm, 0.65 mm pitch) with exposed thermal pad connected internally to PGND for efficient heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | Connects to inductor; carries high di/dt switching current - requires short, low-inductance PCB trace. |
| 3 CBOOT | Bootstrap capacitor terminal | Supplies gate drive for high-side FET; requires 470-nF ceramic capacitor between CBOOT and SW. |
| 4 VCC | Internal LDO output | Bypassed to AGND; powers internal circuitry - no external load permitted. |
| 5 BIAS | Optional LDO input | Improves efficiency when tied to VOUT (3.3–28 V) or external rail; bypass with 1–10 µF capacitor. |
| 6 SYNC | External clock input | Enables frequency synchronization to avoid beat frequencies; requires proper high-speed termination. |
| 7 RT | Frequency set resistor | Resistor to AGND programs switching frequency; open circuit = 500 kHz default. |
| 8 PGOOD | Power-good flag | Open-drain output indicating regulated VOUT; requires 10–100 kΩ pull-up to logic rail ≤12 V. |
| 9 FB | Feedback sense input | Monitors VOUT via resistor divider; 1.011 V reference sets output voltage (VOUT = 1.011 × (1 + RFBT/RFBB)). |
| 10 AGND | Analog ground | Reference for internal references and logic; must connect to system ground with low-impedance path. |
| 11 SS/TRK | Soft-start / tracking control | Capacitor extends soft-start time; external ramp enables output voltage tracking during power sequencing. |
| 12 EN | Enable input | Logic-level control: ≥2.1 V enables regulator; ≤0.4 V disables - supports precision UVLO programming. |
| 13, 14 VIN | Main input supply | Connects to input capacitor (CIN); dual pins reduce IR drop and improve high-frequency decoupling. |
| 15, 16 PGND | Power ground | Low-side FET source return; connects to thermal pad and CIN/COUT grounds - critical for EMI and thermal performance. |
| PAD | Thermal pad | Internally connected to PGND; must be soldered to large PCB copper area for thermal conduction and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient) - qualified for engine bay, ADAS, and infotainment applications. |
| Light-load efficiency mode | Discontinuous conduction (DCM) and PFM operation - maintains >85% efficiency at 1 mA load (VIN = 24 V, VOUT = 3.3 V). |
| EMI compliance | Tested to EN55022/CISPR 22 Class B radiated/conducted emissions - validated on reference board with no input filter. |
| Robust protection suite | Cycle-by-cycle current limit, hiccup-mode short-circuit response, thermal shutdown, and VCC UVLO - prevents damage during fault conditions. |
| Flexible enable & sequencing | Precision EN threshold (2.1 V ±3%) with 294 mV hysteresis - enables accurate system-level undervoltage lockout and power sequencing. |
| Output voltage tracking | SS/TRK pin accepts external ramp - supports controlled startup of multi-rail systems (e.g., FPGA core/I/O rails). |
Applications
| Automotive Body Control Module | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and door-lock actuators in vehicle body electronics with cold-crank survival. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V point-of-load regulator with precision enable for system wake-up sequencing. Use Value: 27 µA IQ enables >1-year battery standby; 3.5-V start-up ensures operation during cranking transients. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera modules requiring low-noise, EMI-compliant power. IC Role / Device Role / Timing Role: Synchronous buck regulator with soft-start and PGOOD for clean power-up and fault reporting. Use Value: EN55022 Class B compliance eliminates need for external EMI filters; PGOOD enables sensor initialization sync. |
| Commercial Vehicle Telematics | Industrial IoT Gateway |
Use Scenario: Powers LTE modem, GPS receiver, and microcontroller in fleet management telematics units operating from 12/24-V truck batteries. IC Role / Device Role / Timing Role: Wide-VIN DC-DC converter with BIAS pin optimized for 5-V output efficiency. Use Value: BIAS-to-VOUT connection improves full-load efficiency by ~2%; 60-V abs-max rating withstands load-dump events. |
Use Scenario: Provides isolated 3.3-V rail for ARM Cortex-M host processor and wireless SoC in edge gateway devices deployed in harsh environments. IC Role / Device Role / Timing Role: Automotive-grade buck regulator used in industrial temperature grade designs for extended reliability. Use Value: AEC-Q100 qualification ensures long-term stability at 125°C ambient; thermal pad enables passive cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM46002QPWPRQ1 | Standard version with higher light-load IQ (32 µA vs 27 µA); same pinout, package, and specs except PFM behavior. | Less optimized for ultra-low-power always-on systems; suitable where cost sensitivity outweighs 5-µA IQ advantage. | Select LM46002AQPWPRQ1 for new designs prioritizing lowest quiescent current; LM46002QPWPRQ1 remains valid for legacy compatibility. |
| LM61480QRNRRQ1 | Higher 8-A output capability, 3-V to 36-V input, 12-µA IQ, and integrated PMBus telemetry - not pin-compatible. | Targets higher-power ADAS domain controllers or central gateways needing telemetry and dynamic margining. | Choose LM61480QRNRRQ1 only when >2-A output or digital monitoring is required; LM46002AQPWPRQ1 excels in compact 2-A space-constrained modules. |
Compared with LM46002QPWPRQ1, the LM46002AQPWPRQ1 delivers lower quiescent current for battery-sensitive automotive modules, while LM61480QRNRRQ1 offers scalability and telemetry at the cost of larger footprint and non-interchangeable layout.
Availability
LM46002AQPWPRQ1 is available at Aetrix Electronics and suitable for automotive body control, ADAS camera power, and commercial vehicle telematics requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for LM46002AQPWPRQ1 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 decades of automotive qualification expertise and AEC-Q100-compliant manufacturing.
The LM46002-Q1 family was designed specifically for automotive power conversion - emphasizing wide input range, low IQ, EMI robustness, and seamless integration into ASIL-B compatible systems.
FAQ
What is the minimum input voltage required for LM46002AQPWPRQ1 to start switching?
The LM46002AQPWPRQ1 requires a minimum input voltage of 3.8 V to initiate regulation. This ensures reliable startup during automotive cold-crank events where battery voltage dips transiently. Below this threshold, the device remains in shutdown with only 2.3–5 µA quiescent current drawn from VIN, preserving battery energy until sufficient voltage is restored for operation.
How does the BIAS pin improve efficiency in LM46002AQPWPRQ1 designs?
The BIAS pin in LM46002AQPWPRQ1 allows connection to VOUT (for 3.3–28 V outputs) or an external 3.3/5 V rail, reducing power loss in the internal LDO. When tied to VOUT, it cuts operating IQ from 27 µA to ~12 µA (non-switching) and improves full-load efficiency by up to 2%, especially beneficial in thermally constrained automotive modules.
Can LM46002AQPWPRQ1 synchronize to an external clock, and what are the timing requirements?
Yes, LM46002AQPWPRQ1 supports external clock synchronization via the SYNC pin. It accepts TTL/CMOS-compatible signals with high-level threshold ≥2 V and low-level ≤0.4 V, duty cycle 10–90%, and minimum pulse width 80 ns. Proper high-speed termination is required to prevent ringing that could cause erratic frequency locking or jitter.
What is the purpose of the thermal pad (PAD) on the LM46002AQPWPRQ1 HTSSOP package?
The exposed thermal pad on the LM46002AQPWPRQ1 is internally connected to PGND and serves as the primary heat dissipation path. It must be soldered to a large PCB copper area tied to system ground. This reduces junction-to-board thermal resistance to 1.7°C/W (bottom) and 19.9°C/W (junction-to-board), enabling reliable 2-A operation at +125°C ambient without forced airflow.
Does LM46002AQPWPRQ1 support output voltage tracking, and how is it implemented?
Yes, LM46002AQPWPRQ1 supports output voltage tracking via the SS/TRK pin. Connecting this pin to an external voltage ramp (e.g., from another regulator's soft-start node) forces the LM46002AQPWPRQ1 output to follow that ramp, enabling coordinated power-up of multi-rail systems like FPGA core/I/O supplies or processor/memory combinations without sequencing ICs.
LM46002AQPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- 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):
- 3.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 2A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM46002AQPWPRQ1 FAQ
1.How can I place an order for LM46002AQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM46002AQPWPRQ1 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 LM46002AQPWPRQ1 reliable?
The price and inventory of LM46002AQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM46002AQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for LM46002AQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM46002AQPWPRQ1 transactions.
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4.How is shipping managed for LM46002AQPWPRQ1?
LM46002AQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM46002AQPWPRQ1 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 LM46002AQPWPRQ1?
For technical support, including LM46002AQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM46002AQPWPRQ1 requirements.
6.How does Aetrix verify that LM46002AQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All LM46002AQPWPRQ1 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 LM46002AQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of LM46002AQPWPRQ1?
All LM46002AQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM46002AQPWPRQ1, 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 LM46002AQPWPRQ1 part is unused and in its original packaging.
Return procedure for LM46002AQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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