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Texas Instruments LP3876ES-3.3/NOPB
- Part No.:
- LP3876ES-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LP3876ES-3.3/NOPB.pdf
- Description:
- IC REG LIN 3.3V 3A DDPAK/TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:173
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Product details
Overview
LP3876ES-3.3/NOPB from Texas Instruments is a 3A ultra-low-dropout linear regulator with fixed 3.3V output, designed for high-current microprocessor and DSP power supplies. It delivers ±1.5% output voltage accuracy at room temperature, maintains 800mV dropout at 3A load, and features remote sense capability via dedicated SENSE pin for improved load regulation at remote points.
For engineers reviewing the LP3876ES-3.3/NOPB datasheet, LP3876ES-3.3/NOPB pinout, LP3876ES-3.3/NOPB application, or LP3876ES-3.3/NOPB equivalent, key selection considerations include dropout performance under full 3A load, thermal derating in TO-263 (DDPAK) package, error flag behavior at −10% VOUT deviation, and minimum 10µF/low-ESR output capacitor requirements for stability.
Technical Context
The LP3876ES-3.3/NOPB uses a CMOS-based PMOS pass transistor architecture enabling low quiescent current independent of load, with shutdown current as low as 1µA. Its error flag comparator monitors output voltage with 10% threshold hysteresis and open-drain output requiring external pull-up.
Unlike the LP3873 variant, the LP3876 includes a dedicated SENSE pin to regulate voltage directly at the load point-critical for applications with PCB trace resistance between regulator and load. The device integrates overtemperature and overcurrent protection, with short-circuit current limited to 6A peak and thermal shutdown activating above +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% (25°C), ±3.0% over full temperature/load range - ensures stable core logic supply for 3.3V microprocessors. |
| Max Output Current | 3A DC continuous - supports high-current digital loads including FPGAs and multi-core DSPs without current limiting. |
| Dropout Voltage | 800mV at 3A load - enables operation from 4.1V input when regulating 3.3V, critical for battery-powered systems near end-of-discharge. |
| Ground Pin Current | 6mA typical at 3A load - low bias current preserves efficiency in high-current linear regulation. |
| PSRR | 57dB at 120Hz (VIN = VOUT + 0.5V) - suppresses ripple from upstream switching regulators feeding the LDO input. |
| Output Noise | 150µVrms (BW = 10Hz–100kHz) - low noise essential for analog-sensitive circuits powered from same rail. |
| Error Flag Threshold | −10% VOUT (±5% hysteresis) - provides reliable early-warning fault indication before system reset thresholds are violated. |
Pinout & Package
LP3876ES-3.3/NOPB is packaged in a thermally enhanced 5-pin DDPAK/TO-263 surface-mount package with exposed thermal pad (KTT0005B). The package supports high-power dissipation with θJA = 60°C/W (0.5in² copper area) and requires soldering to a large copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SD | Shutdown Control Input | CMOS-compatible active-low enable; must be pulled high via 10kΩ resistor if not driven actively - disables regulator and reduces ground current to 1µA. |
| 2 - VIN | Input Supply Terminal | Accepts 2.5V–7.0V input; internal parasitic diode allows reverse current up to 200mA DC if VOUT > VIN - requires external reverse-blocking diode in back-powering scenarios. |
| 3 - GND | Power Ground Reference | Low-impedance return path for input/output currents; must connect to single-point "star" ground with input/output capacitors to avoid instability. |
| 4 - VOUT | Regulated Output Terminal | Delivers 3.3V @ up to 3A; connects to local bypass capacitors (≥10µF, low ESR) placed within 1cm using Kelvin traces. |
| 5 - SENSE | Remote Voltage Sense Input | Connects directly to load point to compensate for IR drop in PCB traces - enables <0.08% load regulation even with 100mΩ trace resistance at 3A. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 800mV at 3A enables use with 4.1V input sources - extends battery runtime in portable 3.3V systems. |
| Remote sense capability | Dedicated SENSE pin eliminates voltage error from PCB trace resistance - maintains 3.3V ±1.5% at load point, not just at regulator pin. |
| Error flag with hysteresis | Open-drain output asserts low when VOUT falls >10% below nominal - provides clean, bounce-free fault signaling to host controller or supervisor IC. |
| Thermal & current protection | Internally limits output during overload or overtemperature - prevents damage during transient faults without external circuitry. |
| Low-noise CMOS design | 150µVrms broadband noise supports mixed-signal applications where LDO noise couples into ADC references or PLLs. |
Applications
| Microprocessor Core Supply | GTL+/SSTL Bus Termination |
|---|---|
|
Use Scenario: Powering 3.3V I/O cores of FPGAs or ASICs with fast dynamic current demands (e.g., burst-mode memory access). IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 3.3V from intermediate 5V or 4.5V rail. Use Value: 3A capability and 25µs turn-on delay ensure immediate response to load transients; remote sense compensates for voltage drop across dense BGA routing. |
Use Scenario: Providing precision 3.3V termination voltage for GTL+, SSTL_33, or DDR1 memory buses. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage reference source for parallel bus termination networks. Use Value: ±1.5% output tolerance and <0.08% load regulation maintain signal integrity margins; low PSRR rejects noise from shared power planes. |
| DSP Power Management | Battery-Powered Post-Regulation |
|
Use Scenario: Supplying 3.3V analog and digital sections of TI C6000-series DSPs with simultaneous high-current and low-noise requirements. IC Role / Device Role / Timing Role: Dual-role regulator: powers CPU core (via VOUT) and analog subsystem (via remote-sensed VSENSE). Use Value: 150µVrms noise avoids degradation of ADC SNR; 800mV dropout allows operation from single-cell Li-ion (3.0–4.2V) with margin. |
Use Scenario: Regulating 3.3V from variable-input battery packs (e.g., 2S Li-ion, 6–8.4V) in portable test equipment or medical sensors. IC Role / Device Role / Timing Role: High-efficiency linear post-regulator following buck converter, reducing switching noise on sensitive analog rails. Use Value: Shutdown mode draws only 1µA - extends shelf life in always-on monitoring devices; thermal protection prevents overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS75733KTTT | 3A LDO with 3.3V output, 120mV dropout at 3A, but no SENSE pin; higher PSRR (60dB @ 120Hz); TO-263-5 package. | Lacks remote sensing - unsuitable for >50mΩ trace resistance; better for noise-sensitive but locally loaded applications. | Select when lowest possible dropout and highest PSRR are prioritized over remote load regulation. |
| LP3879SD-3.3 | 3A 3.3V LDO in smaller 6-pin WSON package; 150mV dropout at 3A; includes SENSE pin; rated for −40°C to +125°C. | Smaller footprint and lower thermal resistance (θJA = 40°C/W) but requires tighter layout control; not pin-compatible. | Choose for space-constrained designs needing comparable remote-sense capability and improved thermal performance. |
Compared with TPS75733KTTT and LP3879SD-3.3, the LP3876ES-3.3/NOPB offers unique remote sensing in a mature, thermally robust TO-263 package - making it optimal for industrial and embedded systems where trace resistance compensation and long-term reliability outweigh minimal size or dropout advantages.
Availability
LP3876ES-3.3/NOPB is available at Aetrix Electronics and suitable for microprocessor power supplies, GTL+/SSTL bus terminators, and DSP power management requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance per TI's production data sheet SNVS220E.
Supply support for LP3876ES-3.3/NOPB 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 power management technologies, with decades of expertise in high-reliability linear regulation.
The LP3876 series belongs to TI's ultra-low-dropout linear regulator product line, engineered specifically for high-current, low-noise, and thermally demanding applications in computing, communications, and industrial control systems.
FAQ
What is the minimum input voltage required for LP3876ES-3.3/NOPB to regulate 3.3V at 3A?
The LP3876ES-3.3/NOPB requires a minimum input voltage of 4.1V to maintain regulation at 3A load, based on its 800mV typical dropout voltage (VIN ≥ VOUT + VDROP). Below this, output voltage collapses proportionally. At lighter loads, dropout drops to 80mV - enabling operation from as low as 3.38V at 300mA.
Can LP3876ES-3.3/NOPB be used without connecting the SENSE pin?
Yes - the SENSE pin must be connected directly to the VOUT pin if remote sensing is not required. Leaving it floating will cause regulation instability. When tied to VOUT, the LP3876ES-3.3/NOPB behaves identically to the LP3873 in local-regulation mode, maintaining 0.08% load regulation at the output pin.
How does the ERROR flag on LP3876ES-3.3/NOPB behave during shutdown?
When the SD pin is pulled low to activate shutdown mode, the ERROR flag on LP3876ES-3.3/NOPB is forced invalid (high-impedance) to conserve power. It resumes normal operation - asserting low when VOUT drops >10% below 3.3V - only after SD returns high and the regulator fully powers up.
What output capacitor specifications are mandatory for stable operation of LP3876ES-3.3/NOPB?
LP3876ES-3.3/NOPB requires a minimum 10µF output capacitor with ESR between 10mΩ and 1Ω, placed within 1cm of the device using Kelvin-connected traces. Tantalum or POSCAP capacitors are preferred; ceramic types must use X7R/X5R dielectrics to maintain capacitance across temperature and bias.
Is LP3876ES-3.3/NOPB compatible with lead-free reflow profiles?
Yes - LP3876ES-3.3/NOPB (NOPB suffix) is lead-free and RoHS-compliant, qualified for standard Pb-free reflow profiles with peak temperature up to 260°C for 5 seconds. The DDPAK/TO-263 package's exposed thermal pad must be fully soldered to ensure both thermal performance and mechanical reliability.
LP3876ES-3.3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- 15 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LP3876ES-3.3/NOPB FAQ
1.How can I place an order for LP3876ES-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3876ES-3.3/NOPB 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 LP3876ES-3.3/NOPB reliable?
The price and inventory of LP3876ES-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3876ES-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LP3876ES-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3876ES-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3876ES-3.3/NOPB?
LP3876ES-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3876ES-3.3/NOPB 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 LP3876ES-3.3/NOPB?
For technical support, including LP3876ES-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3876ES-3.3/NOPB requirements.
6.How does Aetrix verify that LP3876ES-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3876ES-3.3/NOPB 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 LP3876ES-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LP3876ES-3.3/NOPB?
All LP3876ES-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3876ES-3.3/NOPB, 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 LP3876ES-3.3/NOPB part is unused and in its original packaging.
Return procedure for LP3876ES-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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