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Texas Instruments LP2981A-30DBVRE4
- Part No.:
- LP2981A-30DBVRE4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2981A-30DBVRE4.pdf
- Description:
- IC REG LINEAR 3V 100MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,801
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Product details
Overview
LP2981A-30DBVRE4 from Texas Instruments is an A-grade 3.0-V fixed-output ultra-low dropout linear regulator in SOT-23-5 package, delivering 100 mA continuous output with ±0.75% output tolerance, 200 mV typical dropout at full load, and 0.01 µA shutdown current-designed for power management in mobile phones and digital cameras.
For engineers reviewing the LP2981A-30DBVRE4 datasheet, LP2981A-30DBVRE4 pinout, LP2981A-30DBVRE4 application, or LP2981A-30DBVRE4 equivalent, key selection criteria include dropout voltage at 100 mA, shutdown quiescent current, output tolerance grade, thermal protection behavior, and SOT-23-5 PCB layout compatibility.
Technical Context
The LP2981A-30DBVRE4 uses a PNP pass transistor architecture enabling ultra-low dropout operation and inherently low quiescent current (600 µA typ at 100 mA). Its internal reference is trimmed to 1.23 V, and feedback is implemented via fixed resistor divider integrated into the die.
It features active ON/OFF control with TTL/CMOS-compatible input threshold (≤0.15 V for OFF, ≥1.6 V for ON), overcurrent and thermal shutdown protection, and requires external output capacitance with minimum 3.3 µF and specified ESR range for stability across –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±0.75% (A-grade) - ensures stable rail for 3.3-V logic interfaces with margin for I/O voltage drop. |
| Max Output Current | 100 mA continuous - supports moderate-power microcontrollers, sensors, and RF front-end biasing. |
| Dropout Voltage | 200 mV typ at 100 mA - enables regulation from 3.2 V input, critical for single-cell Li-ion or Li-poly battery systems. |
| Quiescent Current | 600 µA typ at full load - minimizes standby power loss in always-on portable subsystems. |
| Shutdown Current | 0.01 µA typ - allows deep-sleep mode in battery-powered devices without significant leakage drain. |
| Input Voltage Range | 2.2 V to 16 V - accommodates wide-input applications including automotive accessory rails and multi-cell battery packs. |
| Operating Temp | –40°C to +125°C - qualified for industrial and extended-temperature embedded environments. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.1 mm body, gull-wing leads, RoHS-compliant green finish (Pb-free, no Sb/Br), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 2.2–16 V; internal parasitic diode anode-requires Schottky clamp if VOUT may exceed VIN. |
| 2 (GND) | Ground reference | Low-impedance analog ground return for regulator core and feedback network. |
| 3 (ON/OFF) | Enable/disable control | Active-high TTL/CMOS input; ≤0.15 V = OFF (0.01 µA IQ), ≥1.6 V = ON; must be actively terminated. |
| 4 (NC) | No-connect terminal | Internally unconnected; must remain floating-no trace, pad, or solder mask opening required. |
| 5 (VOUT) | Regulated output | 3.0 V ±0.75%, delivers up to 100 mA; requires ≥3.3 µF output capacitor with controlled ESR for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 200 mV at 100 mA enables operation from single Li-ion cell (3.0–4.2 V) down to 3.2 V input. |
| A-grade precision | ±0.75% output tolerance over temperature ensures reliable 3.0-V rail for ADC references and low-voltage logic. |
| Integrated protection | Thermal shutdown and foldback current limiting prevent damage during overload or high ambient conditions. |
| Fast transient response | Stabilizes within microseconds after load steps-critical for burst-mode digital loads like camera flash ICs. |
| ESD robustness | 2000-V HBM / 200-V MM rating supports handling in standard assembly environments without special precautions. |
Applications
| Mobile Phone Baseband | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powering baseband processor I/O banks and auxiliary peripherals in slim-profile smartphones with tight thermal constraints. IC Role / Device Role: Primary 3.0-V LDO supplying noise-sensitive digital circuitry with fast line/load regulation. Use Value: 200 mV dropout extends usable battery life by >15 minutes at end-of-discharge; 0.01 µA shutdown enables zero-current sleep states. | Use Scenario: Providing clean, stable bias to CMOS image sensor analog front-end and timing controller. IC Role / Device Role: Low-noise (160 µV RMS), low-dropout regulator decoupled from noisy digital supply domains. Use Value: 63 dB ripple rejection suppresses switching noise from DC-DC converters; ±0.75% tolerance maintains sensor gain linearity. |
| Portable Medical Monitor | Industrial Handheld Scanner |
Use Scenario: Supplying real-time patient monitoring SoC and analog signal chain in battery-operated clinical devices. IC Role / Device Role: Safety-critical 3.0-V rail generator with overtemperature and overcurrent fault reporting via shutdown flag. Use Value: –40°C to +125°C qualification ensures reliability in sterilization cycles and field-deployed environments. | Use Scenario: Powering barcode laser driver, MCU, and Bluetooth radio in ruggedized handheld data collection terminals. IC Role / Device Role: Single-chip 3.0-V regulator with enable control synchronized to scan trigger and radio wake-up events. Use Value: 0.01 µA shutdown current reduces average system power by >30% during idle periods between scans. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70730PDQNR | Lower IQ (25 µA typ), but only 300 mA max output; 1.8–5.5 V input; different pinout (SOT-23-5, but pin 3 = GND, pin 2 = EN). | Not suitable for 16-V input systems; lacks reverse-input protection guidance; requires re-layout due to swapped EN/GND pins. | Select when ultra-low standby power dominates over input voltage range and board reuse. |
| MCP1700T-3002E/TT | Higher dropout (600 mV at 250 mA); ±2% tolerance; no shutdown pin; SOT-23-3 package (no EN or NC pins). | Cannot support shutdown sequencing; insufficient accuracy for precision analog rails; incompatible pin count and function mapping. | Choose only for cost-sensitive, non-shutdown applications where 3.0 V ±2% is acceptable. |
Compared with TLV70730PDQNR and MCP1700T-3002E/TT, the LP2981A-30DBVRE4 uniquely balances 16-V input capability, ±0.75% A-grade accuracy, 200-mV dropout, and dedicated shutdown control in a standard SOT-23-5 footprint-making it optimal for space-constrained, battery-powered systems requiring precision and low-quiescent operation.
Availability
LP2981A-30DBVRE4 is available at Aetrix Electronics and suitable for mobile phones, digital cameras, and portable medical monitors requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LP2981A-30DBVRE4 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 specializing in analog, embedded processing, and power management technologies, with leadership in high-reliability, low-power, and precision analog ICs.
The LP2981 family was designed specifically for portable electronics requiring ultra-low dropout, tight output tolerance, and integrated shutdown-targeting battery-powered applications where efficiency, size, and accuracy are critical.
FAQ
What is the output voltage tolerance of the LP2981A-30DBVRE4 over temperature?
The LP2981A-30DBVRE4 has an output voltage tolerance of ±0.75% over the full operating temperature range of –40°C to +125°C. This A-grade specification is confirmed in the Electrical Characteristics table under "Output voltage tolerance" for LP2981A-xx devices at –40°C to 125°C, ensuring high-precision regulation for sensitive analog and mixed-signal circuits.
Does the LP2981A-30DBVRE4 require an external capacitor on the ON/OFF pin?
No, the LP2981A-30DBVRE4 does not require an external capacitor on the ON/OFF pin. However, TI specifies that the ON/OFF input must be actively terminated-either pulled high to VIN (if shutdown is unused) or driven by a logic source with ≥40 mV/µs slew rate. Floating the pin is not permitted and may cause erratic enable behavior.
Can the LP2981A-30DBVRE4 be used with ceramic output capacitors?
The LP2981A-30DBVRE4 requires a minimum ESR at the output for stability and is not compatible with standard low-ESR ceramic capacitors alone. TI explicitly states ceramics are unsuitable unless a 1-Ω series resistor is added to meet ESR requirements. Solid tantalum capacitors meeting the specified ESR vs. load current curves are recommended for reliable operation.
What is the maximum allowable input voltage for the LP2981A-30DBVRE4?
The absolute maximum continuous input voltage for the LP2981A-30DBVRE4 is 16 V, as stated in the Absolute Maximum Ratings table. The recommended operating input voltage range is 2.2 V to 16 V, with 2.2 V being the minimum required to properly bias the internal control circuitry.
Is pin 4 (NC) on the LP2981A-30DBVRE4 required to be grounded or left open?
Pin 4 on the LP2981A-30DBVRE4 is designated NC (No Connect) and must be left open-unconnected and floating. TI's datasheet explicitly states "NC − No connect; must be left open" and warns against routing traces or applying solder to this pin, as it is internally unconnected and grounding or biasing it may compromise device reliability or performance.
LP2981A-30DBVRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.37V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- 1.7 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
LP2981A-30DBVRE4 FAQ
1.How can I place an order for LP2981A-30DBVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2981A-30DBVRE4 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 LP2981A-30DBVRE4 reliable?
The price and inventory of LP2981A-30DBVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2981A-30DBVRE4 is usually 5 days.
3.What payment methods are accepted for LP2981A-30DBVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2981A-30DBVRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2981A-30DBVRE4?
LP2981A-30DBVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2981A-30DBVRE4 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 LP2981A-30DBVRE4?
For technical support, including LP2981A-30DBVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2981A-30DBVRE4 requirements.
6.How does Aetrix verify that LP2981A-30DBVRE4 is sourced from the original manufacturer or authorized distributors?
All LP2981A-30DBVRE4 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 LP2981A-30DBVRE4 meets industry standards.
7.What is the process for return or replacement of LP2981A-30DBVRE4?
All LP2981A-30DBVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LP2981A-30DBVRE4, 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 LP2981A-30DBVRE4 part is unused and in its original packaging.
Return procedure for LP2981A-30DBVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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