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Texas Instruments LP2980IM5X-ADJ/NOPB
- Part No.:
- LP2980IM5X-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2980IM5X-ADJ/NOPB.pdf
- Description:
- IC REG LIN POS ADJ 50MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,420
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Product details
Overview
LP2980IM5X-ADJ/NOPB from Texas Instruments is an adjustable-output, low-dropout linear regulator delivering up to 50 mA with input voltage range of 2.5 V to 16 V and output range of 1.2 V to 15.0 V. It features ±0.5% typical output accuracy, 55 μA quiescent current at zero load, and stable operation with 2.2-μF ceramic output capacitors - optimized for powering low-voltage microcontrollers in space-constrained industrial and metering applications.
For engineers reviewing the LP2980IM5X-ADJ/NOPB datasheet, LP2980IM5X-ADJ/NOPB pinout, LP2980IM5X-ADJ/NOPB application, or LP2980IM5X-ADJ/NOPB equivalent, key selection criteria include dropout voltage vs. load/temperature, PSRR performance at 1 kHz (70 dB) and 1 MHz (42 dB), enable threshold behavior, thermal shutdown threshold (170°C), and compatibility with ceramic capacitors without ESR requirements.
Technical Context
The LP2980IM5X-ADJ/NOPB uses a PNP pass transistor architecture enabling ultra-low dropout (as low as 1 mV at 0 mA, 120 mV at 50 mA) and high PSRR across wide frequency bands. Its internal bandgap reference (1.2 V nominal) feeds an error amplifier controlling the pass element, with feedback via external resistor divider on the ADJ pin.
It integrates active-high enable (ON/OFF), UVLO (2.2 V rising threshold), thermal shutdown (170°C trip, 150°C reset), current limiting (~160 mA short-circuit), soft-start, and internal output pulldown. The new-chip revision supports 1% total output accuracy over line, load, and temperature - critical for precision MCU core supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | Up to 50 mA continuous - sufficient for low-power MCUs, sensors, and logic rails. |
| Input voltage range | 2.5 V to 16 V - supports wide-input industrial supplies and battery-backed systems. |
| Output voltage range | 1.2 V to 15.0 V (adjustable via external resistors) - covers common logic and analog supply levels. |
| Output accuracy | ±0.5% typical at 25°C; ±1% over full load/temperature - enables tight regulation without post-regulation trimming. |
| Quiescent current | 55 μA at ILOAD = 0 mA; 350 μA at 50 mA - minimizes standby power in always-on systems. |
| PSRR | 70 dB at 1 kHz, 42 dB at 1 MHz - effectively suppresses switching noise from upstream DC/DC converters. |
| Dropout voltage | 120 mV at 50 mA, 25°C; 184 mV at 50 mA, –40°C to 125°C - ensures regulation under worst-case thermal/load conditions. |
| Thermal shutdown | 170°C trip, 150°C reset - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
LP2980IM5X-ADJ/NOPB is housed in a 5-pin SOT-23 (DBV) package measuring 2.9 mm × 1.6 mm, optimized for compact PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 2.5–16 V; requires ≥1 µF ceramic capacitor placed within 0.5″ of pin and returned to clean ground. |
| GND | Ground reference | Common return path for input/output capacitors and feedback network; connects internally to substrate and thermal pad. |
| ON/OFF | Enable control | Active-high logic input; enables regulator when >0.82 V (new chip); includes internal pulldown during disable to discharge output. |
| ADJ | Feedback input | Connects to resistor divider (R1/R2) between VOUT and GND; sets output voltage per VOUT = VREF(1 + R1/R2). |
| VOUT | Regulated output | Delivers adjustable voltage; requires ≥2.2 µF ceramic capacitor (50% derating considered) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with 2.2-µF ceramic capacitors | Eliminates need for tantalum or aluminum electrolytics - reduces BOM cost, improves reliability, and simplifies layout. |
| 70 dB PSRR at 1 kHz | Attenuates low-frequency ripple from buck converters, reducing need for additional LC filtering stages. |
| Internal soft-start | Controls inrush current during power-up, minimizing stress on input capacitors and upstream power sources. |
| Active output pulldown | Forces VOUT to GND when disabled - prevents floating outputs and unintended biasing of downstream circuitry. |
| UVLO with 2.2 V rising threshold | Prevents erratic startup or brownout operation by holding regulator disabled until input reaches valid operating level. |
| Thermal shutdown with hysteresis | Shuts down at 170°C and re-enables at 150°C - avoids thermal cycling near trip point during marginal cooling conditions. |
Applications
| Residential Breakers | Solid State Drives (SSD) |
|---|---|
Use Scenario: Powering real-time monitoring ICs and communication interfaces in smart circuit breakers with wide input voltage due to battery backup and AC-derived rails. IC Role / Device Role / Timing Role: Primary LDO supplying 3.3 V to ARM Cortex-M0+ microcontroller and isolated RS-485 transceiver. Use Value: Ultra-low quiescent current (55 μA) extends battery life during standby; 16 V max input accommodates rectified AC surges. | Use Scenario: Providing clean, adjustable core voltage to NAND flash controllers and DRAM buffers in embedded SSD modules. IC Role / Device Role / Timing Role: Post-regulator for 1.2 V or 1.8 V logic rails, rejecting switching noise from primary DC/DC converter. Use Value: 70 dB PSRR at 1 kHz suppresses 100–500 kHz switching artifacts, improving signal integrity and reducing bit error rates. |
| Electricity Meters | Building Automation |
Use Scenario: Supplying metrology ADCs and secure authentication ICs in Class 0.2 electricity meters requiring long-term accuracy and thermal stability. IC Role / Device Role / Timing Role: Precision-adjustable LDO generating 2.5 V reference rail for sigma-delta ADC front-end. Use Value: ±1% total output accuracy over –40°C to +125°C ensures calibration retention across environmental extremes. | Use Scenario: Powering wireless SoCs (e.g., Zigbee, Thread) and sensor interface circuits in HVAC controllers deployed in unconditioned mechanical rooms. IC Role / Device Role / Timing Role: Main 3.3 V supply for RF transceiver and temperature/humidity sensor signal chain. Use Value: Stable operation with 2.2-μF ceramic capacitor eliminates ESR dependency - critical for reliability in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-ADJ/TO | Fixed 6 V max input; 250 mA output; higher IQ (3.5 µA) but lower PSRR (60 dB @ 1 kHz) | Better suited for higher-current, lower-noise-sensitive applications where input voltage is constrained ≤6 V | Select if >50 mA load or <6 V input required; avoid if 16 V input or high PSRR needed. |
| TLS850F0TES/V0E | Automotive-grade AEC-Q100; 40 V max input; integrated watchdog and reset; higher cost and larger SOIC-8 package | Targeted at automotive body electronics requiring functional safety compliance and extended voltage tolerance | Choose only for automotive designs needing ASIL-B support; not drop-in due to pinout and feature set differences. |
Compared with MCP1703T-ADJ/TO and TLS850F0TES/V0E, LP2980IM5X-ADJ/NOPB offers superior input voltage range (16 V), tighter output accuracy (±1%), and higher PSRR - making it optimal for industrial metering and compact embedded systems where space, thermal headroom, and noise rejection are critical.
Availability
LP2980IM5X-ADJ/NOPB is available at Aetrix Electronics and suitable for residential breakers, solid state drives (SSD), and electricity meters requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for LP2980IM5X-ADJ/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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LP2980-ADJ product line was engineered for cost-sensitive, space-constrained industrial and metering applications demanding high accuracy, low quiescent current, and robust thermal protection in minimal footprint packages.
FAQ
What is the maximum input voltage rating for LP2980IM5X-ADJ/NOPB?
The LP2980IM5X-ADJ/NOPB has an absolute maximum continuous input voltage of 18 V for the new-chip revision, with recommended operating range up to 16 V. Exceeding 18 V risks permanent damage. This rating enables use in industrial systems with transient surges or wide-input battery-backed supplies.
Does LP2980IM5X-ADJ/NOPB require an external feed-forward capacitor (CFF)?
Yes, LP2980IM5X-ADJ/NOPB benefits from a 10-pF feed-forward capacitor (CFF) connected between ADJ and VOUT to improve transient response and PSRR above 100 kHz. While not strictly mandatory for basic regulation, TI recommends CFF for applications sensitive to high-frequency noise or fast load steps.
What is the minimum output capacitance required for stable operation of LP2980IM5X-ADJ/NOPB?
LP2980IM5X-ADJ/NOPB requires a minimum effective output capacitance of 1 µF (derated value) - typically achieved with a nominal 2.2-µF X7R ceramic capacitor. This ensures phase margin >45° and prevents oscillation, even with low-ESR ceramics that older LDOs cannot tolerate.
How does the ON/OFF pin function on LP2980IM5X-ADJ/NOPB?
The ON/OFF pin on LP2980IM5X-ADJ/NOPB is an active-high enable input. It turns the regulator on when voltage exceeds 0.82 V (typical) and off when below 0.18 V. When disabled, an internal pulldown actively discharges VOUT to GND - preventing floating outputs and ensuring predictable system reset behavior.
What thermal protection features are integrated into LP2980IM5X-ADJ/NOPB?
LP2980IM5X-ADJ/NOPB includes thermal shutdown that activates at 170°C junction temperature and resets at 150°C, providing hysteresis to prevent oscillation. It also incorporates current limiting (~160 mA) to reduce power dissipation during overload, working synergistically with thermal protection to safeguard the device under fault conditions.
LP2980IM5X-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 15V
- Voltage Dropout (Max):
- 0.22V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- 1.2 mA
- PSRR:
- 63dB (1kHz)
- 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:
- SOT-23-5
LP2980IM5X-ADJ/NOPB FAQ
1.How can I place an order for LP2980IM5X-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2980IM5X-ADJ/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 LP2980IM5X-ADJ/NOPB reliable?
The price and inventory of LP2980IM5X-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2980IM5X-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LP2980IM5X-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2980IM5X-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2980IM5X-ADJ/NOPB?
LP2980IM5X-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2980IM5X-ADJ/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 LP2980IM5X-ADJ/NOPB?
For technical support, including LP2980IM5X-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2980IM5X-ADJ/NOPB requirements.
6.How does Aetrix verify that LP2980IM5X-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2980IM5X-ADJ/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 LP2980IM5X-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LP2980IM5X-ADJ/NOPB?
All LP2980IM5X-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2980IM5X-ADJ/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 LP2980IM5X-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LP2980IM5X-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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