My Inquiry
My Account
Texas Instruments LP2981-30DBVRG4
- Part No.:
- LP2981-30DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2981-30DBVRG4.pdf
- Description:
- IC REG LINEAR 3V 100MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP2981-30DBVRG4 from Texas Instruments is a 3.0 V fixed-output, ultra-low dropout linear regulator in SOT-23-5 package, delivering up to 100 mA continuous output current with 1.25% output tolerance (standard grade), 200 mV typical dropout at full load, and 0.01 µA shutdown current - designed for power management in space-constrained portable electronics including digital cameras and MP3 players.
For engineers reviewing the LP2981-30DBVRG4 datasheet, LP2981-30DBVRG4 pinout, LP2981-30DBVRG4 application, or LP2981-30DBVRG4 equivalent, key selection considerations include its PNP-based low-dropout architecture, ON/OFF-controlled shutdown capability, SOT-23-5 footprint compatibility, and stability requirements for 3.3 µF minimum output capacitance with specified ESR range.
Technical Context
The LP2981-30DBVRG4 uses a vertical PNP pass element enabling ultra-low dropout voltage (7 mV at 1 mA, 200 mV at 100 mA) and low quiescent current (600 µA typ at full load). Its internal reference is 1.23 V, and regulation is achieved via error amplifier feedback to the pass transistor.
It integrates overcurrent and thermal shutdown protection, supports reverse input-output voltage protection via external Schottky diode, and requires active termination of the ON/OFF pin - pulled high to VIN for always-on operation or driven low (≤0.3 V) to enter 0.01 µA shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±1.25% (standard grade) - ensures stable rail for 3.3 V–tolerant logic and analog circuitry without external resistors. |
| Max Output Current | 100 mA continuous - sufficient for microcontroller cores, sensors, and low-power RF modules in portable devices. |
| Dropout Voltage | 200 mV typ at 100 mA - enables regulation from 3.2 V input, critical for single-cell Li-ion or alkaline battery systems. |
| Quiescent Current | 600 µA typ at full load - minimizes standby power loss while maintaining fast transient response. |
| Shutdown Current | 0.01 µA typ - reduces system-level leakage during sleep modes, extending battery life in always-on peripherals. |
| Input Voltage Range | 2.2 V to 16 V - accommodates wide input sources including boosted battery rails and unregulated wall adapters. |
| Ripple Rejection | 63 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
Pinout & Package
SOT-23-5 (DBV) package: 2.92 mm × 1.6 mm × 1.3 mm body, surface-mount, lead-free (RoHS & no Sb/Br), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 2.2–16 V; must be decoupled with ≥1 µF ceramic capacitor within 1 cm of pin. |
| 2 - GND | Ground reference | Analog ground return for regulator control circuitry and feedback path; requires low-impedance PCB plane. |
| 3 - ON/OFF | Enable/disable control input | Active-high logic: ≥1.6 V enables output; ≤0.3 V disables output and reduces IQ to 0.01 µA. |
| 4 - NC | No-connect terminal | Internally unconnected; must remain floating - no trace, pad, or solder mask opening required. |
| 5 - VOUT | Regulated output | Delivers 3.0 V ±1.25%; requires ≥3.3 µF output capacitor with controlled ESR per load current. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 200 mV at 100 mA enables operation from near-dead batteries and reduces thermal dissipation in compact layouts. |
| Shutdown control | ON/OFF pin reduces total system current to 10 nA, supporting deep-sleep states in battery-powered IoT endpoints. |
| Integrated protection | Thermal foldback and current limiting prevent damage during overload or ambient temperature excursions up to 125°C. |
| Stable with ceramic-compatible ESR | Validated for use with solid tantalum capacitors (3.3–10 µF, 0.1–1.5 Ω ESR); avoids instability caused by ultra-low-ESR ceramics. |
| High PSRR | 63 dB ripple rejection at 1 kHz maintains clean 3.0 V supply for noise-sensitive ADCs and RF receivers. |
Applications
| Digital Camera Power Rail | MP3 Player Core Logic Supply |
|---|---|
Use Scenario: Powers image sensor interface and flash memory controller in compact digital cameras operating from single-cell lithium battery. IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying regulated voltage to CMOS image sensor I/O and NAND flash controller logic. Use Value: 200 mV dropout extends usable battery range by >15 minutes at end-of-discharge; shutdown mode cuts standby current to enable instant-on wake-up. |
Use Scenario: Supplies 3.0 V to audio codec, microcontroller, and display driver in portable MP3 players with 1.5–3.6 V battery input. IC Role / Device Role / Timing Role: Fixed-output LDO providing low-noise bias for audio DAC and low-jitter clock generation circuitry. Use Value: 63 dB PSRR prevents audible switching artifacts from upstream DC/DC converter; 1.25% tolerance ensures reliable SPI/I²C communication timing margins. |
| Laptop Subsystem Bias | PDA Memory Interface Regulator |
Use Scenario: Delivers 3.0 V to embedded security module and fingerprint sensor in ultrabook designs where board space is constrained. IC Role / Device Role / Timing Role: Secondary LDO generating isolated 3.0 V rail for secure element and biometric sensor subsystems. Use Value: SOT-23-5 footprint saves >40% PCB area vs. SOIC-8 alternatives; 0.01 µA shutdown current meets ACPI S5 state leakage budgets. |
Use Scenario: Powers SRAM and NOR flash memory interface in legacy PDA platforms using 3.3 V tolerant logic with tight voltage margin. IC Role / Device Role / Timing Role: Precision voltage source for memory data bus termination and I/O buffer biasing. Use Value: ±1.25% output tolerance ensures setup/hold time compliance across –40°C to 125°C junction range; fast transient response prevents memory access errors during burst reads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2981A-30DBVR | A-grade version with ±0.75% output tolerance and identical pinout/package; higher initial cost but tighter regulation. | Better suited for precision analog front-ends requiring <1% voltage drift over temperature. | Select when output accuracy dominates cost and board area constraints. |
| MCP1700T-3002E/MB | 300 mA rated, 6 µA quiescent current, SOT-23-5, but no shutdown pin - enabled permanently or via external FET. | Lacks integrated ON/OFF control; requires additional component for system-level power gating. | Choose when higher current headroom is needed and shutdown functionality can be implemented externally. |
Compared with LP2981A-30DBVR, the LP2981-30DBVRG4 trades tighter output tolerance for lower unit cost while retaining identical shutdown behavior and thermal performance; versus MCP1700T-3002E/MB, it provides native enable control but at lower max current and higher IQ - making it optimal for ultra-low-power, space-limited 100 mA applications.
Availability
LP2981-30DBVRG4 is available at Aetrix Electronics and suitable for digital camera power rails, MP3 player core logic supplies, and PDA memory interface regulators requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.
Supply support for LP2981-30DBVRG4 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 and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.
The LP2981 family was engineered for ultra-low-power, space-constrained portable electronics - emphasizing minimal dropout, low quiescent current, and robust thermal protection in sub-3 mm² packages.
FAQ
What is the output voltage tolerance of the LP2981-30DBVRG4?
The LP2981-30DBVRG4 is a standard-grade device with an output voltage tolerance of ±1.25% over temperature (–40°C to 125°C) and load (1 mA to 100 mA). This specification ensures reliable operation for 3.3 V–tolerant digital logic and analog circuitry without requiring post-production calibration. The LP2981-30DBVRG4 achieves this using a trimmed internal bandgap reference and precision resistor network.
Does the LP2981-30DBVRG4 require an external capacitor on the ON/OFF pin?
No, the LP2981-30DBVRG4 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 (for always-on operation) or driven by a logic signal with ≥40 mV/µs slew rate. Floating the ON/OFF pin may cause erratic enable behavior or increased noise susceptibility in the LP2981-30DBVRG4.
Can ceramic capacitors be used for the output of the LP2981-30DBVRG4?
Ceramic capacitors alone are not recommended for the LP2981-30DBVRG4 output due to their ultra-low ESR (<20 mΩ), which violates the minimum ESR requirement and risks instability. TI advises using solid tantalum capacitors (3.3–10 µF, 0.1–1.5 Ω ESR) or adding a 1 Ω series resistor if ceramics are used. This constraint directly impacts layout decisions for the LP2981-30DBVRG4 in high-frequency noise environments.
What is the maximum allowable input voltage for the LP2981-30DBVRG4?
The absolute maximum input voltage for the LP2981-30DBVRG4 is 16 V, but the recommended operating range is 2.2 V to 16 V. The 2.2 V minimum ensures proper biasing of the internal control circuitry. Exceeding 16 V risks permanent damage, and operation above 12 V increases thermal stress - especially at high load currents - requiring careful PCB thermal design for the LP2981-30DBVRG4.
How does the LP2981-30DBVRG4 handle reverse input-output voltage conditions?
The LP2981-30DBVRG4 contains an inherent parasitic diode between VIN and VOUT. If VOUT exceeds VIN by ~0.7 V (e.g., during hot-swap or battery swap), this diode forward-biases and may trigger latch-up. TI mandates an external Schottky diode (anode to VOUT, cathode to VIN) to clamp reverse voltage to ~0.3 V - a critical design requirement for fault-tolerant systems using the LP2981-30DBVRG4.
LP2981-30DBVRG4 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
LP2981-30DBVRG4 FAQ
1.How can I place an order for LP2981-30DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2981-30DBVRG4 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 LP2981-30DBVRG4 reliable?
The price and inventory of LP2981-30DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2981-30DBVRG4 is usually 5 days.
3.What payment methods are accepted for LP2981-30DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2981-30DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2981-30DBVRG4?
LP2981-30DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2981-30DBVRG4 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 LP2981-30DBVRG4?
For technical support, including LP2981-30DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2981-30DBVRG4 requirements.
6.How does Aetrix verify that LP2981-30DBVRG4 is sourced from the original manufacturer or authorized distributors?
All LP2981-30DBVRG4 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 LP2981-30DBVRG4 meets industry standards.
7.What is the process for return or replacement of LP2981-30DBVRG4?
All LP2981-30DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LP2981-30DBVRG4, 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 LP2981-30DBVRG4 part is unused and in its original packaging.
Return procedure for LP2981-30DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2981-30DBVRG4 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
