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Texas Instruments LP2987IM-2.5/NOPB
- Part No.:
- LP2987IM-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2987IM-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,011
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Product details
Overview
LP2987IM-2.5/NOPB from Texas Instruments is a fixed-output, 200 mA ultra-low-dropout linear voltage regulator with programmable power-on reset delay and 2.5 V output. It uses a vertically integrated PNP process to achieve 180 mV dropout at 200 mA, <2 µA shutdown current, and ±0.5% output accuracy (A-grade), serving as a precision supply for low-power microcontrollers in portable instrumentation.
For engineers reviewing the LP2987IM-2.5/NOPB datasheet, LP2987IM-2.5/NOPB pinout, LP2987IM-2.5/NOPB application, or LP2987IM-2.5/NOPB equivalent, key selection criteria include dropout performance at 200 mA load, reset delay configurability via external capacitor, ground pin current vs. load behavior, and SOIC-8 thermal resistance (θJ−A = 160°C/W).
Technical Context
The LP2987IM-2.5/NOPB implements a PNP-based LDO architecture with internal bandgap reference and error amplifier driving a vertical PNP pass transistor. Its error flag (open-collector) asserts low when output falls >5% below 2.5 V, and supports programmable power-on reset via external capacitor on the DELAY pin charged by a 2.2 µA current source.
Shutdown control is active-high with defined turn-on threshold (VH ≥ 1.4 V) and turn-off threshold (VL ≤ 0.55 V); improper slew rate (<40 mV/µs) risks indeterminate state. The device lacks a bypass pin-only LP2988 variants include Bypass functionality for noise reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±0.5% (A-grade) at 25°C; maintains regulation across −40°C to +125°C junction range. |
| Dropout Voltage | 180 mV typical at 200 mA load; enables operation with only 2.7 V input for stable 2.5 V output. |
| Quiescent Current | <2 µA in shutdown mode; 1 mA typical ground current at full 200 mA load. |
| Power-On Reset Delay | Programmable via external capacitor on DELAY pin; timing set by 2.2 µA current source and CDLY. |
| Input Voltage Range | 2.1 V to 16 V operating; −0.3 V to +16 V survival rating ensures robustness against transients. |
| Error Flag Threshold | Asserts low when VOUT drops >5% below 2.5 V (i.e., <2.375 V); open-collector output requires external pull-up. |
| Package Thermal Resistance | θJ−A = 160°C/W for SOIC-8 (D) package; limits continuous power dissipation at ambient temperature. |
Pinout & Package
LP2987IM-2.5/NOPB is supplied in an 8-pin SOIC surface-mount package (Package Drawing D0008A), with exposed pad not present. Pin assignments are validated per TI SNVS004J Figure 1 (LP2987 connection diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BYPASS | Not connected (NC) | LP2987 variant lacks Bypass functionality; pin is no-connect (not internally bonded). |
| 2 - DELAY | Reset delay timing node | Accepts external capacitor to set power-on reset timeout; sourced by 2.2 µA current. |
| 3 - GROUND | Reference and return path | Carries ground current scaling with load (1 mA @ 200 mA); must connect to low-impedance analog ground. |
| 4 - INPUT | Main power input | Accepts 2.1–16 V; internal reverse-voltage protection diode requires external Schottky clamp if VOUT > VIN. |
| 5 - SENSE | Output voltage feedback | Monitors regulated output via internal resistive divider; enables accurate sensing independent of load trace IR drop. |
| 6 - OUTPUT | Regulated 2.5 V supply | Delivers up to 200 mA continuous; requires ≥4.7 µF output capacitor with appropriate ESR for stability. |
| 7 - SHUTDOWN | Enable/disable control | Active-high logic: ≥1.4 V enables regulator; ≤0.55 V disables and reduces quiescent current to <2 µA. |
| 8 - ERROR | Open-collector fault indicator | Sinks current when VOUT < 2.375 V; provides power-on reset signal when used with DELAY capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 180 mV @ 200 mA enables single-cell Li-ion or two-cell alkaline operation while maintaining 2.5 V output. |
| Programmable reset delay | Single external capacitor on DELAY pin sets precise power-on reset timeout without additional ICs or timers. |
| High output accuracy | ±0.5% over temperature (A-grade) ensures reliable ADC reference or MCU core voltage compliance. |
| Low-noise operation | 100 µVRMS output noise (300 Hz–50 kHz) supports sensitive analog circuitry without added filtering. |
| Robust protection | Integrated overtemperature and overcurrent shutdown prevent damage during fault conditions. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor requiring stable 2.5 V for 16-bit ADC and low-power MCU. IC Role / Device Role / Timing Role: Primary voltage regulator supplying precision analog front-end and digital core; delivers clean, accurate 2.5 V reference. Use Value: 180 mV dropout extends battery life by enabling operation down to 2.7 V input; ±0.5% accuracy ensures <0.5 LSB ADC error. |
Use Scenario: Remote environmental monitor using LoRaWAN, logging temperature/humidity with flash memory writes. IC Role / Device Role / Timing Role: Main system regulator sequencing power to MCU, sensor interface, and RF transceiver during wake-up cycles. Use Value: Programmable reset delay ensures MCU initializes fully before peripherals activate; <2 µA shutdown current minimizes sleep-mode drain. |
| Handheld Test Equipment | Automotive Body Control Modules |
|
Use Scenario: Pocket-sized multimeter with LCD display, precision op-amps, and auto-ranging circuitry. IC Role / Device Role / Timing Role: Low-noise 2.5 V supply for reference buffers and signal conditioning stages adjacent to analog inputs. Use Value: 100 µVRMS output noise avoids adding measurable error to µV-level measurements; SOIC-8 simplifies manual rework. |
Use Scenario: Dashboard cluster module powering microcontroller, CAN transceiver, and LED drivers in 12 V automotive system. IC Role / Device Role / Timing Role: Secondary regulator deriving 2.5 V for MCU I/O banks and sensor interfaces from main 5 V rail. Use Value: −40°C to +125°C operating range meets AEC-Q100 ambient requirements; 16 V max input withstands load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSS721AIDR | 2.5 V, 250 mA, 250 mV dropout @ 250 mA; no reset delay; higher quiescent current (45 µA active). | Lacks programmable power-on reset; suited for simpler systems where sequencing is handled externally. | Select when reset functionality is unnecessary and higher load current margin is required. |
| TPS7A2025PDQNR | 2.5 V, 300 mA, 175 mV dropout @ 300 mA; 6.5 µA quiescent current; no reset pin; 1% initial accuracy. | No DELAY or ERROR pins; optimized for ultra-low IQ but lacks built-in reset signaling capability. | Choose for lowest possible active IQ and higher current headroom, accepting external reset generation. |
Compared with LP2987IM-2.5/NOPB, TSS721AIDR offers higher current but omits reset delay, while TPS7A2025PDQNR improves dropout and IQ but removes all supervision features-making LP2987IM-2.5/NOPB uniquely suitable for self-contained, reset-aware embedded designs.
Availability
LP2987IM-2.5/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, handheld test equipment, and automotive body control modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for LP2987IM-2.5/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 company delivering analog and embedded processing solutions, with leadership in power management ICs and precision analog design.
The LP2987 family was engineered for micropower, ultra-low-dropout regulation in space-constrained portable electronics, emphasizing accuracy, low IQ, and integrated power sequencing functions.
FAQ
What is the maximum input voltage for LP2987IM-2.5/NOPB?
The LP2987IM-2.5/NOPB supports an operating input voltage range of 2.1 V to 16 V. Its absolute maximum survival rating is −0.3 V to +16 V, making it suitable for 12 V automotive and industrial systems with transient tolerance. Exceeding 16 V may cause permanent damage.
Does LP2987IM-2.5/NOPB include a bypass pin for noise reduction?
No, LP2987IM-2.5/NOPB does not include functional Bypass pin capability. That feature is exclusive to LP2988 variants (e.g., LP2988IM-2.5/NOPB). On LP2987IM-2.5/NOPB, Pin 1 is no-connect (NC) and must remain unconnected per TI SNVS004J.
How is the power-on reset delay configured on LP2987IM-2.5/NOPB?
The LP2987IM-2.5/NOPB uses its DELAY pin (Pin 2) and an external capacitor to set reset timeout. A 2.2 µA internal current source charges the capacitor; delay time TDELAY ≈ CDLY × 5.59×10⁵. For example, 100 nF yields ~56 ms delay. Maximum recommended CDLY is 1 µF.
What package type and thermal performance does LP2987IM-2.5/NOPB use?
LP2987IM-2.5/NOPB is packaged in SOIC-8 (Package Drawing D0008A) with θJ−A = 160°C/W. This allows ~0.5 W continuous dissipation at 25°C ambient before reaching 125°C junction limit. PCB copper area and airflow significantly impact real-world thermal performance.
Is LP2987IM-2.5/NOPB pin-compatible with other LP2987 variants?
Yes, all LP2987 variants-including LP2987IM-2.5/NOPB, LP2987IM-3.3/NOPB, and LP2987IM-5.0/NOPB-share identical SOIC-8 pinout, electrical interface, and functional pin mapping. Only the fixed output voltage differs; no layout change is needed when substituting within the LP2987 family.
LP2987IM-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- 3.7 mA
- PSRR:
- 65dB (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:
- 8-SOIC
LP2987IM-2.5/NOPB FAQ
1.How can I place an order for LP2987IM-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2987IM-2.5/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 LP2987IM-2.5/NOPB reliable?
The price and inventory of LP2987IM-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2987IM-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP2987IM-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2987IM-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2987IM-2.5/NOPB?
LP2987IM-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2987IM-2.5/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 LP2987IM-2.5/NOPB?
For technical support, including LP2987IM-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2987IM-2.5/NOPB requirements.
6.How does Aetrix verify that LP2987IM-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2987IM-2.5/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 LP2987IM-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP2987IM-2.5/NOPB?
All LP2987IM-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2987IM-2.5/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 LP2987IM-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP2987IM-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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