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Texas Instruments LP2987AIM-2.5/NOPB
- Part No.:
- LP2987AIM-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2987AIM-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
LP2987AIM-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 shutdown control. It delivers 2.5 V ±0.5% (A-grade) output at up to 200 mA load, features 180 mV dropout at full load, <2 µA quiescent current in shutdown, and operates from 2.1 V to 16 V input. It is used in battery-powered portable electronics requiring stable low-noise bias for RF or analog circuitry.
For engineers reviewing the LP2987AIM-2.5/NOPB datasheet, LP2987AIM-2.5/NOPB pinout, LP2987AIM-2.5/NOPB application, or LP2987AIM-2.5/NOPB equivalent, key selection criteria include dropout voltage at 200 mA, reset delay configurability via external capacitor, ground pin current vs. load, output noise performance, and SOIC-8 thermal characteristics for industrial temperature operation.
Technical Context
The LP2987AIM-2.5/NOPB uses a vertically integrated PNP pass transistor architecture enabling ultra-low dropout and low ground current across load range. Its error comparator monitors output voltage against an internal 1.23 V reference, asserting the open-collector ERROR pin when output falls >5% below nominal.
Power-on reset delay is implemented by charging an external capacitor on the DELAY pin using a 2.2 µA current source; the ERROR pin transitions high once DELAY pin voltage reaches 1.23 V. Shutdown is controlled by a TTL/CMOS-compatible input that draws <1 µA when asserted low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.5% (A-grade) at 25°C; maintains accuracy over −40°C to +125°C junction range |
| Max Output Current | 200 mA continuous; peak output >250 mA supports transient loads without dropout |
| Dropout Voltage | 180 mV @ 200 mA load (typical); enables regulation with only 2.68 V input for 2.5 V output |
| Quiescent Current | <2 µA in shutdown mode; reduces system standby power in always-on portable devices |
| Ground Pin Current | 1 mA @ 200 mA load (typical); low, load-proportional GND current improves efficiency vs. older LDOs |
| Reset Threshold | Output drop >5% triggers ERROR pin low; provides reliable power-fail detection for microcontroller reset |
| Input Voltage Range | 2.1 V to 16 V operating; supports single-cell Li-ion, multi-cell alkaline, and intermediate bus rails |
Pinout & Package
LP2987AIM-2.5/NOPB is packaged in an 8-pin SOIC (D package, drawing D0008A), with exposed pad not present. Thermal resistance θJ−A = 160°C/W enables 1.2 W dissipation at 25°C ambient before thermal shutdown.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BYPASS) | Bypass node for internal bandgap reference | Not used on LP2987 (only LP2988); leave unconnected or tie to ground per layout guidelines |
| 2 (DELAY) | Reset delay timing input | Accepts external capacitor to set power-on reset timeout; 2.2 µA current source charges it to 1.23 V |
| 3 (GROUND) | Power return path | Carries load current plus ground pin current (1 mA @ 200 mA); requires low-impedance analog ground connection |
| 4 (INPUT) | Main supply input | Accepts 2.1–16 V; must be decoupled with ≥2.2 µF ceramic capacitor within 0.5 inch of pin |
| 5 (SENSE) | Output voltage feedback sense | Enables remote sensing; connect directly to load for improved regulation under PCB trace IR drop |
| 6 (OUTPUT) | Regulated output | Delivers 2.5 V ±0.5%; requires ≥4.7 µF output capacitor with appropriate ESR for stability |
| 7 (SHUTDOWN) | Active-low enable control | Drives output off when ≤0.18 V; requires >1.4 V to enable; slew rate ≥40 mV/µs prevents misoperation |
| 8 (ERROR) | Open-collector fault/reset flag | Sinks current when output drops >5%; requires external pull-up for logic-level reset signal generation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 180 mV @ 200 mA enables use with low-input-voltage sources like single Li-ion cells |
| Programmable power-on reset | Single external capacitor on DELAY pin sets reset timeout-no external timer IC required |
| Low ground pin current | 1 mA @ 200 mA load improves efficiency vs. traditional LDOs with higher quiescent losses |
| High accuracy output | ±0.5% over temperature ensures reliable operation of precision analog or RF circuitry |
| Integrated protection | Thermal shutdown and current limiting prevent damage during overload or ambient rise |
Applications
| Cellular Phone Power Management | Palmtop/Laptop Subsystem Bias |
|---|---|
Use Scenario: Providing clean 2.5 V bias to baseband processor I/O or memory interface in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO for voltage-sensitive digital subsystems requiring tight regulation and fast load transient response. Use Value: 180 mV dropout allows operation down to 2.68 V input, extending battery runtime in fading charge conditions. |
Use Scenario: Supplying 2.5 V to USB PHY, touch controller, or display driver in compact mobile computing platforms. IC Role / Device Role / Timing Role: Secondary regulated rail generator with programmable reset to coordinate subsystem power sequencing. Use Value: ERROR pin provides hardware reset signal synchronized to power ramp, eliminating need for discrete supervisor IC. |
| Camcorder Image Sensor Bias | Personal Stereo DAC Reference |
Use Scenario: Delivering low-noise 2.5 V to CMOS image sensor analog front-end in consumer camcorders. IC Role / Device Role / Timing Role: Precision analog supply with minimal PSRR degradation and low output impedance at high frequencies. Use Value: Low ground current and optimized PNP architecture reduce supply-induced noise coupling into sensitive pixel readout paths. |
Use Scenario: Generating stable 2.5 V reference for stereo audio DACs in portable media players. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source ensuring consistent DAC full-scale output and THD performance. Use Value: ±0.5% initial accuracy and 20 ppm/°C tempco maintain linearity across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F0TESA1 | 500 mA rated, 300 mV dropout @ 500 mA, integrated watchdog timer, automotive AEC-Q100 qualified | Targets automotive body electronics; higher current, wider input (3.5–40 V), no programmable reset delay | Select for automotive environments requiring extended temp range and functional safety features |
| TPS7A2025PDQNR | 300 mA rated, 130 mV dropout @ 300 mA, 6.5 µA quiescent current, no reset/delay pins, DQN (X2SON-6) package | Optimized for space-constrained IoT sensors; lacks power-on reset and shutdown control | Select when board area is critical and reset functionality is handled elsewhere in system |
Compared with TLS850F0TESA1 and TPS7A2025PDQNR, the LP2987AIM-2.5/NOPB uniquely combines programmable reset delay, shutdown control, and 200 mA capability in SOIC-8 - making it optimal for portable industrial and consumer designs needing sequenced power-up without added components.
Availability
LP2987AIM-2.5/NOPB is available at Aetrix Electronics and suitable for cellular phone power management, palmtop/laptop subsystem bias, camcorder image sensor bias, and personal stereo DAC reference applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LP2987AIM-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 designing analog, embedded processing, and connectivity technologies for industrial, automotive, and personal electronics markets.
The LP2987 series belongs to TI's precision micropower LDO portfolio, engineered for battery-powered portable equipment where ultra-low dropout, low ground current, and integrated power sequencing are essential.
FAQ
What is the maximum input voltage rating for LP2987AIM-2.5/NOPB?
The LP2987AIM-2.5/NOPB has an absolute maximum input voltage of +16 V and a recommended operating range of 2.1 V to +16 V. Exceeding 16 V may cause permanent damage. For reliable operation in systems with transient spikes, input clamping or filtering is advised. The LP2987AIM-2.5/NOPB includes internal overvoltage protection on the INPUT pin but is not designed for sustained operation above 16 V.
Does LP2987AIM-2.5/NOPB support remote sensing, and how is it implemented?
Yes, LP2987AIM-2.5/NOPB supports remote sensing via the SENSE pin (Pin 5). To implement, connect the SENSE trace directly to the load point rather than to the OUTPUT pin, compensating for PCB trace IR drop. This maintains ±0.5% output accuracy at the load under varying current conditions. The LP2987AIM-2.5/NOPB does not require external resistors for this function - it is internally configured for direct Kelvin sensing.
How is the power-on reset delay time calculated for LP2987AIM-2.5/NOPB?
The reset delay time (TDELAY) is set by an external capacitor (CDLY) on the DELAY pin and follows TDELAY ≈ 5.59 × 10⁵ × CDLY, where CDLY is in farads. For example, a 100 nF capacitor yields ~56 ms delay. The LP2987AIM-2.5/NOPB's internal 2.2 µA current source charges CDLY to 1.23 V to trigger ERROR pin transition. Maximum recommended CDLY is 1 µF.
What is the output voltage tolerance of LP2987AIM-2.5/NOPB over temperature?
The LP2987AIM-2.5/NOPB "A" grade guarantees ±0.5% output voltage tolerance at 25°C and ±0.8% over the full −40°C to +125°C junction temperature range. This is verified via statistical quality control and applies under standard test conditions (VIN = VO(NOM) + 1 V, IL = 1 mA). The device's 20 ppm/°C temperature coefficient contributes predictably to this drift budget.
Can LP2987AIM-2.5/NOPB be used without connecting the SHUTDOWN pin?
Yes - if shutdown control is unused, the SHUTDOWN pin (Pin 7) must be tied directly to INPUT (Pin 4) to ensure the LP2987AIM-2.5/NOPB remains enabled. Leaving it floating risks undefined output behavior due to noise susceptibility. The LP2987AIM-2.5/NOPB draws <1 µA when pulled high and <2 µA when pulled low, so no additional current-limiting resistor is needed in either configuration.
LP2987AIM-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
LP2987AIM-2.5/NOPB FAQ
1.How can I place an order for LP2987AIM-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2987AIM-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 LP2987AIM-2.5/NOPB reliable?
The price and inventory of LP2987AIM-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 LP2987AIM-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP2987AIM-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2987AIM-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2987AIM-2.5/NOPB?
LP2987AIM-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2987AIM-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 LP2987AIM-2.5/NOPB?
For technical support, including LP2987AIM-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2987AIM-2.5/NOPB requirements.
6.How does Aetrix verify that LP2987AIM-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2987AIM-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 LP2987AIM-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP2987AIM-2.5/NOPB?
All LP2987AIM-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2987AIM-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 LP2987AIM-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP2987AIM-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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