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Texas Instruments LM76005RNPR
- Part No.:
- LM76005RNPR
- Manufacturer:
- Texas Instruments
- Package:
- 30-WFQFN Exposed Pad
- Datasheet:
-
LM76005RNPR.pdf
- Description:
- IC REG BUCK ADJ 5A 30WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
LM76005RNPR from Texas Instruments is a 3.5-V to 60-V, 5-A synchronous step-down DC-DC converter with peak-current-mode control, 200–500 kHz adjustable switching frequency, 15 µA quiescent current in regulation, and input transient tolerance up to 65 V - deployed in industrial PCs, IP cameras, and motor drives requiring rugged, low-EMI power conversion.
For engineers reviewing the LM76005RNPR datasheet, LM76005RNPR pinout, LM76005RNPR application, or LM76005RNPR equivalent, this page delivers verified functional safety–capable operation, pre-bias startup support, FPWM/PFM mode selection, thermal shutdown, hiccup short-circuit protection, and WQFN-30 wettable flanks package implementation details.
Technical Context
The LM76005RNPR employs fixed-frequency peak-current-mode control with internal compensation, enabling stable regulation across wide VIN (3.5–60 V) and VOUT (1 V to 95% of VIN) ranges without external loop components. It supports seamless transition between CCM, DCM, and PFM modes, with programmable frequency via RT pin or external SYNC clock (200–500 kHz).
Its architecture integrates high-side and low-side NMOS FETs (RDS(on) = 95/45 mΩ typ), precision enable with UVLO hysteresis, soft-start (6.3 ms default), output voltage tracking, and power-good flag with 2.5% hysteresis - all optimized for PCB layout simplicity, CISPR22-compliant EMI performance, and thermal dissipation via exposed DAP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - supports 24-V and 48-V industrial rails with 65-V transient tolerance for surge robustness |
| Output Current | Up to 5 A continuous - enables single-chip supply for FPGA I/O, microcontroller cores, or sensor subsystems |
| Switching Frequency | 200–500 kHz adjustable - balances solution size (higher fSW) vs. efficiency (lower fSW) per design needs |
| Quiescent Current | 15 µA in regulation - extends battery life in always-on asset tracking or surveillance systems |
| Efficiency | 95% at 12 VIN/5 VOUT/2 A/400 kHz - minimizes thermal load in enclosed enclosures |
| Protection Features | Thermal shutdown (150°C), cycle-by-cycle current limit, hiccup short-circuit, input UVLO - ensures autonomous fault recovery |
| Package | WQFN-30 (6.0 mm × 4.0 mm) with wettable flanks - enables automated optical inspection and high-power thermal transfer via DAP |
Pinout & Package
The LM76005RNPR is housed in a 30-pin WQFN leadless package (6.0 mm × 4.0 mm) with wettable flanks and an exposed thermal pad (DAP) soldered to system ground for optimal heat dissipation. Pin functions are validated per TI SNVSBK5A datasheet Rev A (July 2020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1–5, 21–22, 24–26) | Switch node | Connects to inductor and bootstrap capacitor; carries high di/dt switching current - requires tight layout to minimize EMI |
| BOOT (Pin 6) | High-side gate driver supply | Requires 470-nF ceramic capacitor to SW; critical for HS FET turn-on integrity and efficiency |
| RT (Pin 10) | Frequency setting | Resistor-to-ground sets fSW; open = 400 kHz default - enables precise EMI band placement |
| SS/TRK (Pin 11) | Soft-start / tracking control | Internal 2-µA current source charges external cap; floating = 6.3-ms ramp - prevents inrush in multi-rail systems |
| FB (Pin 12) | Voltage feedback input | Senses resistor divider ratio; regulates VOUT to 1.006 V reference - determines output accuracy and stability |
| PGOOD (Pin 16) | Power-good flag | Open-drain output signaling VOUT within ±5% window; used for sequencing or fault indication |
| SYNC/MODE (Pin 17) | Sync input / mode select | Tie to GND for PFM (efficiency), VIN for FPWM (constant fSW), or external clock for synchronization |
| EN (Pin 18) | Precision enable | Adjustable UVLO via resistor divider; 1.204 V threshold with 150-mV hysteresis - enables controlled power-up |
| BIAS (Pin 9) | External bias supply input | Connect to VOUT (3.3–18 V) or 3.3/5 V rail to reduce internal LDO losses - improves light-load efficiency |
| AGND (Pins 13–15) | Analog ground reference | Reference for FB, RT, SS/TRK; must be star-connected to PGND near IC to avoid noise coupling |
| PVIN (Pins 20–21, 22) | Main power input | Supplies internal bias LDO and HS FET; requires local 10-µF ceramic CIN placed adjacent to pin and PGND |
| PGND (Pins 24–26) | Power ground return | Source of LS FET; connects to CIN, COUT, DAP, and system ground - forms low-inductance return path |
| DAP/EP | Exposed thermal pad | Internally connected to AGND; must be soldered to ≥4 thermal vias to inner ground plane - primary heat conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety-Capable Documentation | TI provides FIT rate data, failure mode analysis, and diagnostic coverage reports - accelerates ISO 26262/IEC 61508 system certification |
| Pin-Selectable FPWM Operation | SYNC/MODE pin configures forced PWM (constant fSW) or auto PFM/DCM - eliminates audible noise and maintains timing predictability |
| Start-Up with Pre-Biased Output | Enables hot-swap or rail-sequencing applications where VOUT is non-zero at EN assertion - prevents reverse current damage |
| Optimized Low-EMI Design | Integrated slew-rate control, symmetrical SW node routing, and WQFN wettable flanks meet CISPR22 Class B limits without shielding |
| Scalable Power Architecture | PIN-compatible with LM76002/3 (2.5 A/3.5 A) - allows same PCB footprint across 2.5–5 A designs for BOM rationalization |
| External Bias Input (BIAS Pin) | Reduces internal LDO loading when VOUT ≥3.3 V - cuts quiescent loss by >50% at light loads versus self-biased operation |
Applications
| Industrial PC & PLC Power | IP Network Camera Supply |
|---|---|
Use Scenario: Powering CPU I/O banks, FPGA configuration rails, and communication interfaces in DIN-rail mounted controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary 5-V or 3.3-V point-of-load regulator delivering regulated output from 24-V DC bus with surge immunity. Use Value: 65-V input tolerance withstands 48-V bus transients; PFM mode sustains <15-µA standby draw during PLC sleep cycles. | Use Scenario: Providing clean, efficient 12-V or 5-V power to CMOS image sensors, Ethernet PHYs, and video encoders in outdoor surveillance units. IC Role / Device Role / Timing Role: Synchronous buck converter supplying stable voltage under variable thermal and load conditions across day/night operation. Use Value: 95% efficiency at 2 A reduces heatsink requirements; wettable flanks ensure reliable reflow in high-volume camera assembly. |
| Electric Bike Motor Control | Asset Tracking System Power |
Use Scenario: Generating auxiliary 5-V rail for MCU, CAN transceiver, and display from 36-V or 48-V battery pack subject to vibration and temperature extremes. IC Role / Device Role / Timing Role: High-reliability DC-DC stage converting battery voltage to logic-level supply with fast transient response. Use Value: Thermal shutdown (150°C) and hiccup protection prevent latch-up during motor stall events; FPWM mode avoids frequency modulation in EMI-sensitive RF bands. | Use Scenario: Powering GPS/GNSS receivers, cellular modems, and environmental sensors in battery-operated fleet telematics units deployed for years without service. IC Role / Device Role / Timing Role: Ultra-low-IQ step-down regulator maintaining system wakefulness during periodic location reporting. Use Value: 15-µA quiescent current extends 2-Ah Li-ion battery life to >5 years in sleep mode; pre-bias startup enables immediate wake from deep discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM76003RNPR | Same WQFN-30 package, 3.5-A rating, identical pinout and feature set - differs only in max output current and RDS(on) (110/55 mΩ) | Lower current capability suits cost-sensitive 3.3-A applications; reduced thermal margin at full load | Select when 3.5-A peak suffices and BOM consolidation with LM76005 is prioritized |
| LM5164QPWPRQ1 | Automotive-grade (AEC-Q100), 1-A output, 3–65-V input, SOIC-14 package - no FPWM, no pre-bias start, higher IQ (40 µA) | Targeted at automotive body electronics; lacks industrial EMI optimization and scalable pin compatibility | Choose only for automotive qualification requirements; not drop-in due to lower current, different package, and missing features |
Compared with LM76003RNPR, the LM76005RNPR delivers 43% higher output current in identical footprint and thermal interface; versus LM5164QPWPRQ1, it offers industrial-grade EMI performance, 2.7× lower quiescent current, and full functional scalability - making it optimal for non-automotive 5-A applications demanding reliability and design reuse.
Availability
LM76005RNPR is available at Aetrix Electronics and suitable for industrial PCs, IP network cameras, and motor drive subsystems requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.
Supply support for LM76005RNPR 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 designing analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The LM76005RNPR belongs to TI's LM7600x scalable buck converter family, engineered for rugged industrial power supplies where input surge resilience, low EMI, and functional safety documentation are mandatory design requirements.
FAQ
What is the maximum input voltage the LM76005RNPR can withstand without damage?
The LM76005RNPR has an absolute maximum PVIN-to-PGND rating of 65 V, allowing it to survive transient surges beyond its 60-V operating limit - a key specification for industrial 48-V systems exposed to load-dump events. This 65-V tolerance is explicitly defined in Section 6.1 Absolute Maximum Ratings of the TI SNVSBK5A datasheet, and does not require external clamping for typical 24-V/48-V bus applications.
Does the LM76005RNPR support output voltage tracking during power-up?
Yes, the LM76005RNPR supports output voltage tracking via the SS/TRK pin (Pin 11). When connected to an external voltage ramp, the device regulates its output to follow that reference - enabling coordinated sequencing with other rails in multi-voltage systems. This function is documented in Section 7.3.3 and Figure 7-3 of the LM76005RNPR datasheet, and operates independently of the internal 6.3-ms soft-start timer.
Can the LM76005RNPR start up when the output capacitor is already charged (pre-biased)?
Yes, the LM76005RNPR supports start-up with pre-biased output voltage - a feature explicitly listed in its "Designed for rugged industrial applications" section and verified in Section 8.1 Application Information. This prevents reverse current flow into the output during hot-swap or multi-rail sequencing, protecting downstream circuitry without requiring external diodes or control logic.
What package type and thermal characteristics does the LM76005RNPR use?
The LM76005RNPR uses a 30-pin WQFN package (6.0 mm × 4.0 mm) with wettable flanks and an exposed thermal pad (DAP). Its junction-to-board thermal resistance (RθJB) is 9.1°C/W, and junction-to-ambient (RθJA) is 29.6°C/W with standard 2-oz copper - values confirmed in Section 6.4 Thermal Information of the datasheet. The DAP must be soldered to a grounded copper area with ≥4 thermal vias for rated performance.
How does the LM76005RNPR achieve high efficiency at light loads?
The LM76005RNPR achieves high light-load efficiency (92% at 10 mA) through automatic transition to pulse-frequency modulation (PFM) mode, reducing switching frequency and gate drive losses. Combined with 15-µA quiescent current and optional external BIAS pin connection (to VOUT or 3.3/5 V rail), it minimizes static losses - all detailed in Sections 1 and 6.8 of the LM76005RNPR datasheet.
LM76005RNPR 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:
- 5A
- Frequency - Switching:
- 200kHz ~ 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 30-WQFN (6x4)
LM76005RNPR FAQ
1.How can I place an order for LM76005RNPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM76005RNPR 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 LM76005RNPR reliable?
The price and inventory of LM76005RNPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM76005RNPR is usually 5 days.
3.What payment methods are accepted for LM76005RNPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM76005RNPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM76005RNPR?
LM76005RNPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM76005RNPR 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 LM76005RNPR?
For technical support, including LM76005RNPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM76005RNPR requirements.
6.How does Aetrix verify that LM76005RNPR is sourced from the original manufacturer or authorized distributors?
All LM76005RNPR 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 LM76005RNPR meets industry standards.
7.What is the process for return or replacement of LM76005RNPR?
All LM76005RNPR units undergo pre-shipment inspection (PSI). If there is an issue with LM76005RNPR, 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 LM76005RNPR part is unused and in its original packaging.
Return procedure for LM76005RNPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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