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Texas Instruments LM76002RNPT
- Part No.:
- LM76002RNPT
- Manufacturer:
- Texas Instruments
- Package:
- 30-WFQFN Exposed Pad
- Datasheet:
-
LM76002RNPT.pdf
- Description:
- IC REG BUCK ADJ 2.5A 30WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,460
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Product details
Overview
LM76002RNPT from Texas Instruments is a 3.5-V to 60-V, 2.5-A synchronous step-down DC-DC converter in a 30-pin WQFN (6.0 mm × 4.0 mm) package with wettable flanks. It delivers regulated output voltage from 1 V to 95% VIN using peak current-mode control, features 15-µA quiescent current in regulation, 65-ns minimum on-time, and supports synchronization to external clocks up to 2.2 MHz. It is used in industrial power rails requiring high input voltage tolerance and compact footprint.
For engineers reviewing the LM76002RNPT datasheet, LM76002RNPT pinout, LM76002RNPT application, or LM76002RNPT equivalent, key selection considerations include its 2.5-A continuous output capability, integrated high-side/low-side MOSFETs (RDS(on) = 150 mΩ / 85 mΩ), precision enable threshold (1.204 V), power-good flag, and adjustable soft-start-critical for reliable startup in telecom and PLC systems.
Technical Context
The LM76002RNPT employs fixed-frequency peak-current-mode control with internal compensation, enabling stable operation across wide input (3.5–60 V) and output (1 V–95% VIN) ranges. Its tON-MIN = 65 ns and tOFF-MIN = 95 ns support high step-down ratios, while automatic frequency foldback extends regulation at light loads.
It operates in three modes: PFM for high efficiency at light load (15 µA IQ), FPWM for constant switching frequency, and synchronized mode via SYNC/MODE pin. Protection includes cycle-by-cycle current limit (4.2 A typical HS), hiccup-mode short-circuit response, thermal shutdown (160 °C), and VCC undervoltage lockout (3.14 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - supports wide industrial and automotive battery inputs without pre-regulation |
| Output Current | 2.5 A continuous - sufficient for powering FPGAs, microcontrollers, and sensor interfaces |
| Quiescent Current | 15 µA in regulation - enables always-on subsystems with minimal standby power loss |
| Switching Frequency | 300 kHz to 2.2 MHz - adjustable via RT resistor or external clock for EMI optimization and size reduction |
| Feedback Reference | 1.006 V typical - enables accurate output voltage setting with standard resistor dividers |
| Thermal Resistance | RθJA = 29.6 °C/W - validated for 6.0 mm × 4.0 mm WQFN package with proper PCB copper and thermal vias |
| Current Limit | 4.2 A typical high-side peak - provides robust overload protection without external sensing |
| Soft-Start Time | 6.3 ms default - prevents inrush current during power-up of downstream capacitors |
Pinout & Package
LM76002RNPT is housed in a 30-pin WQFN package (6.00 mm × 4.00 mm, 0.5-mm pitch) with wettable flanks for automated optical inspection and enhanced thermal dissipation via exposed DAP connected to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to inductor and bootstrap capacitor; carries high di/dt switching current - requires short, low-inductance layout |
| BOOT | Bootstrap supply | Drives high-side gate; requires 470-nF ceramic capacitor between BOOT and SW for proper HS FET turn-on |
| FB | Voltage feedback input | Senses output via resistor divider; 1.006-V reference enables precise VOUT programming (e.g., 3.3 V with 1 MΩ/309 kΩ) |
| EN | Precision enable | Logic-controlled startup with 1.204-V rising threshold; supports adjustable UVLO using external resistor divider |
| PGOOD | Open-drain power-good flag | Signals regulation status (high = OK); requires pull-up resistor; asserts low on overvoltage, undervoltage, or EN deactivation |
| SYNC/MODE | Mode selection & sync input | Configures PFM/AUTO, FPWM, or external clock sync; rising-edge triggered; must not float |
| SS/TRK | Soft-start & tracking | Internal 2-µA current source charges external capacitor for programmable ramp; also accepts external voltage for sequencing |
| RT | Frequency set | Resistor-to-ground sets fSW; 133 kΩ → 300 kHz, 17.4 kΩ → 2.2 MHz; open → 500 kHz default |
| VCC | Internal bias supply | 3.29-V LDO output; requires 2.2-µF bypass capacitor to AGND; no external loading recommended |
| BIAS | Optional efficiency boost | Accepts external 3.3 V or 5 V rail (or ties to VOUT if 3.3–18 V) to reduce losses; requires 1-µF bypass |
| AGND / PGND / DAP | Analog & power ground | AGND = reference for FB/EN/PGOOD; PGND = return for LS FET and CIN/COUT; DAP = thermal pad tied to AGND and system ground |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode; reduces conduction loss and improves full-load efficiency by >5% vs. asynchronous designs |
| Adjustable soft-start (6.3 ms default) | Prevents output overshoot and inrush into large bulk capacitors; extended via external capacitor for multi-rail sequencing |
| Voltage tracking capability | Enables controlled ramp-up of multiple supplies using SS/TRK as slave input - critical for FPGA core/I/O rail coordination |
| Power-good flag with hysteresis | Provides reliable system reset signaling with 4% UV/OV thresholds and 2.5% hysteresis - avoids false toggling near regulation limits |
| High-efficiency light-load architecture (PFM) | Maintains >85% efficiency at 10-mA load via frequency foldback - essential for battery-backed or energy-harvesting applications |
| Wettable flank WQFN package | Enables AOI-compatible solder joint inspection and improves thermal transfer to PCB copper - verified for 29.6 °C/W θJA |
Applications
| Telecom Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Providing isolated 3.3-V or 5-V rails from 24-V or 48-V backplane in base station remote radio units. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering 2.5-A load current with tight output accuracy and fast transient response. Use Value: Wide 3.5–60-V input range accommodates brownout and surge conditions; PGOOD enables safe FPGA configuration sequencing. | Use Scenario: Powering digital I/O circuits, ADCs, and communication interfaces (RS-485, CAN) in modular automation controllers. IC Role / Device Role / Timing Role: Point-of-load regulator with precision enable and tracking for coordinated startup with CPU core supply. Use Value: 15-µA quiescent current supports low-power sleep modes; FPWM mode ensures consistent EMI profile during variable load cycles. |
| Video Surveillance Camera | Fleet Management Telematics Unit |
Use Scenario: Generating stable 12-V or 5-V output from vehicle battery (9–16 V nominal, up to 60 V during load dump) for image sensor and SoC. IC Role / Device Role / Timing Role: High-reliability buck converter with thermal shutdown and hiccup-mode short-circuit protection. Use Value: 65-ns minimum on-time supports 12-V output from 60-V input; wettable flanks ensure manufacturability in automotive-grade assembly. | Use Scenario: Powering GPS/GNSS receivers, cellular modems, and microcontrollers in harsh-temperature vehicle-mounted tracking devices. IC Role / Device Role / Timing Role: Main DC-DC regulator with adjustable soft-start and voltage tracking for multi-rail SoC power domains. Use Value: RDS(on) of 150 mΩ/85 mΩ minimizes thermal rise at 2.5-A load; -40°C to +125°C junction rating meets automotive ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM76003RNPT | 3.5-A output current, higher HS/LS current limits (5.5 A / 4.2 A), identical pinout and feature set | Preferred where >2.5-A peak load or higher thermal margin is required; same PCB layout | Select LM76003RNPT when future-proofing for higher current or derating for extended temperature operation |
| TPS54360BDDAR | 3.5-A output, 3.5–60-V input, but uses current-mode control without integrated boot capacitor drive; larger solution size | Lacks wettable flanks, PGOOD hysteresis, and voltage tracking; requires external bootstrap diode/capacitor | Choose TPS54360BDDAR only if legacy design reuse or cost sensitivity outweighs layout simplicity and advanced features |
Compared with LM76003RNPT, LM76002RNPT offers lower cost and thermal margin for 2.5-A applications; versus TPS54360BDDAR, it delivers superior integration, smaller footprint, and enhanced reliability features including tracking and wettable flanks - reducing BOM count and validation effort.
Availability
LM76002RNPT is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and video surveillance systems requiring stable component supply, long-term lifecycle support, and automotive-grade thermal performance.
Supply support for LM76002RNPT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs with broad industrial, automotive, and communications reach.
The LM76002RNPT belongs to TI's high-voltage synchronous buck regulator product line, designed specifically for rugged, space-constrained applications demanding wide input range, high efficiency across load, and robust protection in harsh environments.
FAQ
What is the maximum input voltage rating for the LM76002RNPT?
The LM76002RNPT 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. Exceeding 60 V continuously may trigger overvoltage protection or degrade long-term reliability. The device includes internal clamping and thermal shutdown to prevent damage during transient overvoltage events such as load dump in automotive systems. Always verify input transient suppression per application requirements when using LM76002RNPT.
Does the LM76002RNPT support output voltage tracking?
Yes, the LM76002RNPT supports output voltage tracking via the SS/TRK pin. When configured as a slave, an external ramp voltage applied to SS/TRK controls the output voltage slew rate to match another supply. This enables precise power sequencing for FPGAs and multi-rail processors. The internal 2-µA current source allows capacitor-based soft-start extension, and the pin accepts external voltage sources with appropriate buffering. Tracking functionality is fully supported in the LM76002RNPT without additional components.
What is the purpose of the BIAS pin on the LM76002RNPT?
The BIAS pin on the LM76002RNPT provides an optional efficiency boost by supplying the internal bias circuitry from an external 3.3-V or 5-V rail-or directly from VOUT if 3.3 V ≤ VOUT ≤ 18 V. Using BIAS reduces power loss in the internal VCC LDO, improving light-load and full-load efficiency. When unused, BIAS must be tied to ground. A 1-µF capacitor to AGND is required if BIAS is active. This feature is implemented identically in the LM76002RNPT and documented in TI's SNVSAK0A datasheet.
Can the LM76002RNPT operate in forced PWM (FPWM) mode?
Yes, the LM76002RNPT can operate in forced PWM (FPWM) mode by applying a logic-high signal (>0.42 V) to the SYNC/MODE pin. In FPWM mode, the regulator maintains constant switching frequency across all load conditions, eliminating audible noise and ensuring predictable EMI behavior-critical for sensitive analog or RF circuits. This mode disables automatic frequency foldback and PFM operation. FPWM is fully supported in the LM76002RNPT and does not require external components beyond proper MODE pin termination.
What thermal performance can be expected from the LM76002RNPT in a standard 4-layer PCB layout?
In a standard 4-layer PCB layout with 2 oz copper, 6-in² total thermal pad area, and 12 thermal vias under the DAP, the LM76002RNPT achieves RθJA ≈ 29.6 °C/W - matching the datasheet specification. At 2.5-A load and 24-V input, junction temperature rise is approximately 45 °C above ambient, keeping TJ well below the 150 °C shutdown threshold. Performance is validated per JEDEC JESD51-7 standards and applies directly to the LM76002RNPT in its RNP (WQFN-30) package.
LM76002RNPT 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 30-WQFN (6x4)
LM76002RNPT FAQ
1.How can I place an order for LM76002RNPT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM76002RNPT 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 LM76002RNPT reliable?
The price and inventory of LM76002RNPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM76002RNPT is usually 5 days.
3.What payment methods are accepted for LM76002RNPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM76002RNPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM76002RNPT?
LM76002RNPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM76002RNPT 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 LM76002RNPT?
For technical support, including LM76002RNPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM76002RNPT requirements.
6.How does Aetrix verify that LM76002RNPT is sourced from the original manufacturer or authorized distributors?
All LM76002RNPT 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 LM76002RNPT meets industry standards.
7.What is the process for return or replacement of LM76002RNPT?
All LM76002RNPT units undergo pre-shipment inspection (PSI). If there is an issue with LM76002RNPT, 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 LM76002RNPT part is unused and in its original packaging.
Return procedure for LM76002RNPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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