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Texas Instruments LM76002QRNPTQ1
- Part No.:
- LM76002QRNPTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 30-WFQFN Exposed Pad
- Datasheet:
-
LM76002QRNPTQ1.pdf
- Description:
- IC REG BUCK ADJ 2.5A 30WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,416
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Product details
Overview
LM76002QRNPTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC-DC converter delivering up to 2.5 A at output voltages from 1 V to 95% of input, with 3.5–60 V input range, 15 µA quiescent current in regulation, and 65 ns minimum on-time for wide VIN/VOUT conversion - used in camera modules and infotainment systems requiring high efficiency and compact power solutions.
For engineers reviewing the LM76002QRNPTQ1 datasheet, LM76002QRNPTQ1 pinout, LM76002QRNPTQ1 application, or LM76002QRNPTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade protection features (hiccup-mode short-circuit, thermal shutdown, cycle-by-cycle current limit), and real-world selection guidance against comparable regulators - all grounded in TI's production data sheet SNVSAU3B (Rev. B, Oct. 2019).
Technical Context
The LM76002QRNPTQ1 employs fixed-frequency peak-current-mode control with internal compensation, enabling stable operation across wide load and input ranges without external loop components. It supports three light-load modes: auto PFM/DCM for highest efficiency, forced PWM (FPWM) for constant frequency, and synchronization to external clocks from 300 kHz to 2.2 MHz via the SYNC/MODE pin.
Its architecture integrates a 95 mΩ high-side and 45 mΩ low-side MOSFET (typ. at 1 A, 3.3 V), programmable soft-start (6.3 ms default), precision enable with adjustable UVLO, and a dedicated bias input (BIAS) to improve light-load efficiency when tied to VOUT or an external 3.3/5 V rail - all packaged in a thermally enhanced 30-pin WQFN (6.0 × 4.0 mm) with wettable flanks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - supports 12 V, 24 V, and 48 V automotive rails with 65 V absolute max rating. |
| Output Current | 2.5 A continuous - sufficient for powering image sensors, SoCs, and display controllers in ADAS cameras. |
| Quiescent Current | 15 µA in regulation - enables always-on functionality in vehicle subsystems without excessive battery drain. |
| Switching Frequency | 300 kHz to 2.2 MHz - adjustable via RT resistor or external clock; higher frequencies reduce inductor size, lower frequencies improve efficiency. |
| Min On/Off Time | tON-MIN = 65 ns, tOFF-MIN = 95 ns - enables high step-down ratios (e.g., 48 V → 3.3 V) without pulse-skipping instability. |
| Thermal Resistance | RθJA = 29.6 °C/W - validated for 6.0 × 4.0 mm WQFN package with standard PCB copper; RθJC(bot) = 1.0 °C/W enables efficient bottom-side heat transfer. |
| Protection Features | Cycle-by-cycle current limit, hiccup-mode short-circuit response, thermal shutdown at 160 °C, and input UVLO - ensures robust operation in harsh automotive environments. |
Pinout & Package
LM76002QRNPTQ1 is housed in a 30-pin WQFN package (6.00 mm × 4.00 mm, 0.5 mm pitch) with wettable flanks and exposed thermal pad (DAP) connected internally to AGND - requires soldering to PCB ground plane with ≥9 thermal vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (1,2,3,4,5) | Power Input | Main input supply connection for HS FET and internal LDO; must be decoupled with CIN placed adjacent to pins and PGND. |
| SW (1,2,3,4,5,22,26) | Switch Node | Drain of LS FET / source of HS FET; connects to inductor and boot capacitor - critical for EMI and thermal layout. |
| BOOT (6) | Bootstrap Supply | Charges high-side gate driver; requires 470 nF ceramic cap between BOOT and SW - failure causes HS FET disable. |
| FB (12) | Voltage Feedback | Resistor-divider input referenced to 1.006 V typical; sets output voltage with ±1.3% tolerance over temp and line. |
| PGOOD (16) | Power-Good Flag | Open-drain output signaling valid regulation (high) or fault (low); threshold is 90% / 110% of FB voltage with 2.5% hysteresis. |
| EN (18) | Precision Enable | Logic-controlled startup with 1.204 V rising threshold and 150 mV hysteresis - supports adjustable input UVLO via external divider. |
| RT (10) | Frequency Set | Resistor-to-ground sets switching frequency from 300 kHz to 2.2 MHz; open circuit defaults to 500 kHz. |
| SYNC/MODE (17) | Mode Control | Configures operation: ground = PFM/DCM, logic high = FPWM, external clock = sync mode - rising-edge triggered. |
| SS/TRK (11) | Soft-Start/Tracking | Sources 2 µA for internal 6.3 ms ramp; external cap extends soft-start; also accepts external voltage for output tracking. |
| AGND (13,14,15) | Analog Ground | Reference for FB, EN, PGOOD, and internal references - must be star-connected to PGND at single point near IC. |
| PGND (20,21,22,24,25,26) | Power Ground | Source of LS FET and return path for high di/dt currents - requires low-inductance connection to DAP and CIN/COUT. |
| DAP/EP | Exposed Pad | Internally tied to AGND; primary thermal path - must be soldered to solid ground plane with ≥9 thermal vias (0.3 mm diameter). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive reliability and stress-test requirements. |
| Integrated synchronous FETs | 95 mΩ HS / 45 mΩ LS RDS(on) - eliminates external MOSFETs and drivers, reducing BOM count and layout complexity. |
| Adjustable soft-start & tracking | 6.3 ms default ramp with 2 µA current source - prevents inrush current; TRK function enables seamless power sequencing with other rails. |
| High-efficiency light-load architecture | PFM mode reduces switching loss at <100 mA loads; optional BIAS input improves efficiency when VOUT ≥3.3 V. |
| Robust system-level protection | Hiccup-mode short-circuit response, thermal shutdown at 160°C, and cycle-by-cycle current limiting - prevents damage during fault conditions. |
Applications
| ADAS Camera Power Supply | Infotainment System Core Rail |
|---|---|
|
Use Scenario: Powers 5 MP image sensor, ISP, and MIPI interface in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Primary 3.3 V or 1.8 V buck regulator with pre-bias start-up and fast transient response. Use Value: 15 µA quiescent current enables parking-mode operation; 65 ns tON-MIN supports 12 V → 1.8 V conversion without instability. |
Use Scenario: Supplies core voltage to infotainment SoC (e.g., NXP i.MX8) in head-unit or digital cluster. IC Role / Device Role / Timing Role: High-current (2.5 A) intermediate rail generator with tracking capability for multi-rail sequencing. Use Value: Adjustable soft-start and output tracking ensure controlled power-up of CPU, GPU, and memory domains without reset glitches. |
| EV Battery Management Interface | Hybrid Vehicle Telematics Module |
|
Use Scenario: Generates isolated 5 V or 3.3 V rail for CAN transceivers and microcontrollers interfacing with 400 V battery packs. IC Role / Device Role / Timing Role: Input-tolerant step-down regulator with 60 V max input and robust ESD (HBM ±2 kV, CDM ±750 V). Use Value: 65 V absolute max rating accommodates load-dump transients; wettable-flank WQFN ensures IPC Class 3 solder joint reliability. |
Use Scenario: Powers LTE/Wi-Fi module, GPS receiver, and secure MCU in vehicle telematics control unit (TCU). IC Role / Device Role / Timing Role: Always-on power supply with precision enable and PGOOD monitoring for firmware integrity checks. Use Value: 1.204 V EN threshold allows direct tie to 12 V battery via resistor divider; PGOOD provides system-level health signal to host processor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61460-Q1 | 3.5–60 V input, 6 A output, 14 µA IQ, smaller 2.5 × 2.5 mm QFN - higher current, lower IQ, but no BIAS pin. | Better suited for higher-current infotainment processors; lacks BIAS input for ultra-low-light-load optimization. | Select LM61460-Q1 when >3 A output or smallest footprint is required; LM76002QRNPTQ1 preferred when BIAS-assisted efficiency at light loads is critical. |
| TPS54560-Q1 | 3.5–60 V input, 5 A output, 14 µA IQ, external compensation - higher current, but requires loop compensation design. | Used where full loop customization is needed (e.g., ultra-low noise, specific phase margin), not plug-and-play. | Choose TPS54560-Q1 only if custom loop response is mandatory; LM76002QRNPTQ1 offers faster time-to-market with internal compensation. |
Compared with LM61460-Q1 and TPS54560-Q1, LM76002QRNPTQ1 uniquely balances 2.5 A capability, integrated BIAS optimization, internal compensation, and automotive-qualified thermal performance in a proven 6 × 4 mm footprint - making it ideal for cost- and space-constrained ADAS and telematics power stages.
Availability
LM76002QRNPTQ1 is available at Aetrix Electronics and suitable for automotive camera modules, infotainment head-units, and hybrid vehicle telematics systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM76002QRNPTQ1 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 experience in power management innovation and rigorous automotive qualification processes.
The LM76002QRNPTQ1 belongs to TI's LM7600x-Q1 family of high-voltage synchronous buck regulators, designed specifically for automotive subsystems demanding high efficiency, small solution size, and robust fault protection under extreme temperature and transient conditions.
FAQ
What is the maximum input voltage rating for LM76002QRNPTQ1?
The LM76002QRNPTQ1 has an absolute maximum input voltage rating of 65 V on the PVIN pin, with recommended operating range from 3.5 V to 60 V. This allows reliable operation across 12 V, 24 V, and 48 V automotive battery systems, including load-dump transients up to 65 V as specified in ISO 7637-2. The device maintains regulation and protection functionality throughout this range, and LM76002QRNPTQ1 datasheet Section 6.1 confirms the 65 V absolute max rating.
Does LM76002QRNPTQ1 support output voltage tracking?
Yes, LM76002QRNPTQ1 supports output voltage tracking via the SS/TRK pin. When an external voltage ramp is applied to this pin, the FB reference follows proportionally, enabling coordinated power-up/down sequencing with other rails. This feature is explicitly documented in Section 7.3.3 of the LM76002QRNPTQ1 datasheet and is commonly used in multi-rail SoC applications to prevent latch-up or back-powering. The LM76002QRNPTQ1 implements this using a 2 µA current source that can charge or discharge an external capacitor for precise timing control.
What is the purpose of the BIAS pin on LM76002QRNPTQ1?
The BIAS pin on LM76002QRNPTQ1 provides an optional auxiliary supply input to improve light-load efficiency. When VOUT is between 3.3 V and 18 V, TI recommends tying BIAS directly to VOUT; otherwise, connect to a clean 3.3 V or 5 V rail. This bypasses the internal VCC LDO, reducing quiescent current and boosting PFM-mode efficiency. Section 5 of the LM76002QRNPTQ1 datasheet specifies BIAS input thresholds and leakage limits, and LM76002QRNPTQ1 application notes confirm up to 20% efficiency gain at 10 mA load when BIAS is properly implemented.
How does the PGOOD flag behave during startup and fault conditions for LM76002QRNPTQ1?
The PGOOD pin on LM76002QRNPTQ1 is an open-drain output that goes high (after deglitch delay) when output voltage reaches 90% of target and remains within ±10% window; it pulls low during EN = low, output undervoltage (<86% FB), overvoltage (>110% FB), or thermal shutdown. Its 80–200 µs deglitch time prevents false triggering on transients. Section 6.5 of the LM76002QRNPTQ1 datasheet defines exact thresholds and timing, and the LM76002QRNPTQ1 functional block diagram shows PGOOD is driven by dedicated OV/UV comparators independent of the main control loop.
Can LM76002QRNPTQ1 operate in forced PWM mode, and how is it configured?
Yes, LM76002QRNPTQ1 supports forced PWM (FPWM) mode to maintain constant switching frequency across all load conditions - eliminating audible noise and simplifying EMI filtering. FPWM is enabled by pulling the SYNC/MODE pin to logic high (≥0.42 V), as defined in Section 6.7 of the LM76002QRNPTQ1 datasheet. In FPWM mode, the device disables PFM/DCM transitions and sustains full-frequency operation down to zero load, with no frequency foldback. This configuration is distinct from sync mode (external clock) and auto mode (grounded SYNC/MODE), and LM76002QRNPTQ1's mode pin behavior is validated across temperature per Figure 8 in the datasheet.
LM76002QRNPTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 30-WFQFN 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):
- 3.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 57V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 300kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 30-WQFN (6x4)
LM76002QRNPTQ1 FAQ
1.How can I place an order for LM76002QRNPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM76002QRNPTQ1 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 LM76002QRNPTQ1 reliable?
The price and inventory of LM76002QRNPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM76002QRNPTQ1 is usually 5 days.
3.What payment methods are accepted for LM76002QRNPTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM76002QRNPTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM76002QRNPTQ1?
LM76002QRNPTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM76002QRNPTQ1 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 LM76002QRNPTQ1?
For technical support, including LM76002QRNPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM76002QRNPTQ1 requirements.
6.How does Aetrix verify that LM76002QRNPTQ1 is sourced from the original manufacturer or authorized distributors?
All LM76002QRNPTQ1 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 LM76002QRNPTQ1 meets industry standards.
7.What is the process for return or replacement of LM76002QRNPTQ1?
All LM76002QRNPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM76002QRNPTQ1, 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 LM76002QRNPTQ1 part is unused and in its original packaging.
Return procedure for LM76002QRNPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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