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Texas Instruments LP2987IMX-3.0
- Part No.:
- LP2987IMX-3.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2987IMX-3.0.pdf
- Description:
- IC REG LINEAR 3V 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,827
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Product details
Overview
LP2987IMX-3.0 from Texas Instruments is a fixed-output, 200 mA ultra-low-dropout linear voltage regulator with programmable power-on reset delay, 3.0 V output, ±0.5% initial accuracy (A-grade), 180 mV dropout at 200 mA, and SOIC-8 package - used in portable battery-powered systems requiring stable low-noise bias for RF or analog circuitry.
For engineers reviewing the LP2987IMX-3.0 datasheet, LP2987IMX-3.0 pinout, LP2987IMX-3.0 application, or LP2987IMX-3.0 equivalent, key selection criteria include dropout performance at light-to-full load, integrated reset timing via external capacitor, shutdown quiescent current <2 µA, thermal behavior in SOIC-8, and compatibility with tantalum or ceramic output capacitors meeting ESR stability requirements.
Technical Context
The LP2987IMX-3.0 employs a vertically integrated PNP pass transistor architecture to achieve ultra-low dropout (180 mV @ 200 mA) and low ground pin current (1 mA @ 200 mA). Its error flag output provides both undervoltage detection (−5% threshold) and power-on reset functionality when paired with an external capacitor on the DELAY pin.
It features a dedicated SHUTDOWN input with defined turn-on/turn-off thresholds (VH = 1.6 V, VL = 0.18 V), supports input voltages from 2.1 V to 16 V, and operates across −40°C to +125°C junction temperature. Unlike the LP2988 variant, it lacks the BYPASS pin and associated noise-reduction capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V, ±0.5% tolerance at 25°C (A-grade), enabling precision biasing of 3.0 V logic or analog rails without trimming. |
| Max Output Current | 200 mA continuous, >250 mA peak - sufficient for powering microcontrollers, sensors, or RF front-ends in compact portable designs. |
| Dropout Voltage | 180 mV @ 200 mA load (typical); allows regulation from 3.18 V input, critical for single-cell Li-ion or multi-cell alkaline operation. |
| Quiescent Current | <2 µA in shutdown mode; reduces system standby power loss in always-on battery applications like IoT endpoints. |
| Power-On Reset Delay | Programmable via external capacitor on DELAY pin (CDLY = TDELAY / 5.59×10⁵); enables configurable system initialization timing without external timers. |
| Operating Temp Range | −40°C to +125°C junction temperature - qualified for industrial and automotive under-hood auxiliary supply roles. |
| Input Voltage Range | 2.1 V to 16 V operating; accommodates wide-input sources including unregulated wall adapters or battery stacks. |
Pinout & Package
LP2987IMX-3.0 is housed in an 8-pin SOIC (D) surface-mount package (Package Drawing D0008A), with θJ−A = 160°C/W. Pin functions are validated per TI SNVS004J Rev J.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BYPASS) | No-connect (NC) on LP2987 | This pin is unused and must be left floating; not present on LP2987 (only LP2988 has functional BYPASS). |
| 2 (DELAY) | Reset delay timing node | Sinks 2.2 µA current to ground until output reaches regulation; external capacitor sets power-on reset timeout duration. |
| 3 (GROUND) | Power return path | Carries ground current up to 1 mA at full load; requires low-impedance PCB connection to minimize noise coupling. |
| 4 (INPUT) | Unregulated input supply | Accepts 2.1–16 V; requires ≥2.2 µF input capacitor placed within 0.5″ for stability and transient suppression. |
| 5 (SENSE) | Output voltage feedback | High-impedance sense input; connects directly to regulated output or remote load point for improved line/load regulation. |
| 6 (OUTPUT) | Regulated 3.0 V output | Delivers up to 200 mA; requires ≥4.7 µF output capacitor with appropriate ESR (e.g., 1–10 Ω for 3 V output) for stability. |
| 7 (SHUTDOWN) | Active-low enable control | Pulls low ≤0.18 V to disable regulator; draws <1 µA when held high or low - compatible with GPIO or open-drain drivers. |
| 8 (ERROR) | Open-collector fault flag | Sinks current when output drops >5% below 3.0 V; requires external pull-up for reset signaling or system monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 180 mV @ 200 mA enables operation from marginal input sources (e.g., aging batteries) while maintaining regulation. |
| Single-capacitor power-on reset | Eliminates need for discrete RC timers or supervisor ICs - reduces BOM count and board space in cost-sensitive designs. |
| 0.5% output accuracy (A-grade) | Ensures reliable logic-level compatibility and ADC reference stability without post-production calibration. |
| Thermal & overcurrent protection | Internally limits die temperature and output current to prevent damage during fault conditions or layout thermal bottlenecks. |
| Low ground pin current | 1 mA @ 200 mA load improves efficiency vs. traditional LDOs; reduces I²R losses in high-current portable applications. |
Applications
| Cellular Phone Power Management | Palmtop/Laptop Subsystem Bias |
|---|---|
Use Scenario: Supplies 3.0 V rail to baseband processor core or SIM interface in GSM/UMTS handsets with single Li-ion cell input. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 3.0 V with programmable reset to coordinate boot sequence after battery insertion or cold start. Use Value: 180 mV dropout extends usable battery life by ~15 minutes at end-of-discharge; shutdown mode cuts leakage to <2 µA during sleep states. |
Use Scenario: Powers USB PHY, touch controller, or display driver in clamshell palmtop devices where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Secondary LDO providing isolated 3.0 V domain with independent enable/reset control synchronized to main SoC power sequencing. Use Value: SOIC-8 footprint allows easy integration into dense layouts; ±0.5% accuracy ensures USB signal integrity and touch sensitivity consistency. |
| Camcorder Audio Codec Supply | Personal Stereo DAC Reference |
Use Scenario: Delivers low-noise 3.0 V bias to audio codec IC in handheld camcorders, minimizing hiss and distortion during recording. IC Role / Device Role / Timing Role: Low-dropout regulator with fast transient response and tight DC accuracy - not low-noise optimized (no BYPASS), but sufficient for mid-tier audio. Use Value: Ground pin current of 1 mA at full load reduces thermal rise in sealed enclosures; 125°C rating supports operation near camera sensor heat sources. |
Use Scenario: Provides stable 3.0 V reference to stereo DAC in portable music players using dual AA/AAA cells (3.0–4.5 V input range). IC Role / Device Role / Timing Role: Precision voltage source ensuring consistent DAC full-scale output and channel matching across battery discharge curve. Use Value: 0.5% output tolerance maintains THD+N <0.005% across operating range; 2.1 V min input supports full runtime down to 1.05 V/cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2987IMX-3.3/NOPB | Same SOIC-8 package, identical architecture, but fixed 3.3 V output; same 0.5% accuracy and 180 mV dropout. | Used where system requires 3.3 V logic compliance instead of 3.0 V; not interchangeable without schematic revision. | Select only if target rail voltage is 3.3 V - pinout and thermal behavior match exactly, but output voltage is incompatible. |
| TLC7733IPW | 3.3 V fixed output, no shutdown pin, no DELAY pin, higher 350 mV dropout @ 200 mA, SOT-23-5 package. | Lacks programmable reset and enable control; suited for simpler, lower-cost, space-constrained applications without sequencing needs. | Choose when board area is critical and reset/shutdown functionality is unnecessary; verify 350 mV dropout meets input margin requirements. |
Compared with LP2987IMX-3.0, the LP2987IMX-3.3/NOPB offers identical features at a different output voltage, while TLC7733IPW trades programmability and low dropout for smaller size and lower cost - making each suitable for distinct subsystem power roles.
Availability
LP2987IMX-3.0 is available at Aetrix Electronics and suitable for cellular phone power management, palmtop subsystem bias, camcorder audio codec supply, and personal stereo DAC reference applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LP2987IMX-3.0 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, embedded processing, and connectivity technologies, with decades of LDO design expertise and broad industrial qualification.
The LP2987 series belongs to TI's precision micropower LDO family, engineered for battery-operated portable electronics demanding ultra-low dropout, accurate voltage regulation, and integrated power sequencing - not general-purpose replacement regulators.
FAQ
What is the maximum input voltage for LP2987IMX-3.0?
The LP2987IMX-3.0 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, meaning it can withstand brief transients up to 16 V without damage. Exceeding 16 V risks permanent failure. This wide range allows use with unregulated wall adapters, multi-cell battery packs, or automotive-derived supplies with adequate filtering.
Does LP2987IMX-3.0 have a bypass pin for noise reduction?
No, the LP2987IMX-3.0 does not include a functional BYPASS pin. That feature is exclusive to the LP2988 variant (e.g., LP2988IMX-3.0), which uses an external capacitor on the BYPASS pin to reduce output noise to 20 µVRMS. The LP2987IMX-3.0 outputs 100 µVRMS noise (BW = 300 Hz–50 kHz) and relies on proper output capacitance selection and PCB layout for noise control.
How do I configure the power-on reset delay for LP2987IMX-3.0?
Connect a capacitor between the DELAY pin (Pin 2) and ground. The delay time TDELAY (seconds) is calculated as TDELAY = CDLY × 5.59×10⁵, where CDLY is in farads. For example, a 100 nF capacitor yields ~56 ms delay. Use low-leakage capacitors (tantalum, NP0/C0G ceramic, or film); aluminum electrolytics are prohibited due to excessive leakage.
What is the shutdown current consumption of LP2987IMX-3.0?
When the SHUTDOWN pin is held low (≤0.18 V), the LP2987IMX-3.0 enters sleep mode and draws less than 2 µA total supply current. This ultra-low quiescent state minimizes battery drain in standby or hibernation modes. The SHUTDOWN pin itself draws negligible current - <1 µA when pulled high or low - simplifying drive circuit design.
Can LP2987IMX-3.0 be used with ceramic output capacitors?
Yes, but only with caution: standard ceramic capacitors often have ESR too low (<1 Ω) for stable operation. To ensure stability, add a 1 Ω resistor in series with the ceramic output capacitor. Alternatively, use a tantalum capacitor (4.7 µF minimum, 1–10 Ω ESR typical) - which is the preferred choice per TI's application guidance for the LP2987IMX-3.0.
LP2987IMX-3.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 0.35V @ 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
LP2987IMX-3.0 FAQ
1.How can I place an order for LP2987IMX-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2987IMX-3.0 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 LP2987IMX-3.0 reliable?
The price and inventory of LP2987IMX-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2987IMX-3.0 is usually 5 days.
3.What payment methods are accepted for LP2987IMX-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2987IMX-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2987IMX-3.0?
LP2987IMX-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2987IMX-3.0 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 LP2987IMX-3.0?
For technical support, including LP2987IMX-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2987IMX-3.0 requirements.
6.How does Aetrix verify that LP2987IMX-3.0 is sourced from the original manufacturer or authorized distributors?
All LP2987IMX-3.0 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 LP2987IMX-3.0 meets industry standards.
7.What is the process for return or replacement of LP2987IMX-3.0?
All LP2987IMX-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LP2987IMX-3.0, 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 LP2987IMX-3.0 part is unused and in its original packaging.
Return procedure for LP2987IMX-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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