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Texas Instruments LP2987IM-3.2/NOPB
- Part No.:
- LP2987IM-3.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2987IM-3.2/NOPB.pdf
- Description:
- IC REG LINEAR 3.2V 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
LP2987IM-3.2/NOPB from Texas Instruments is a fixed-output, 200 mA ultra-low-dropout linear regulator with programmable power-on reset delay, designed for precision low-noise power supply in portable electronics. It delivers 3.2 V output at ±0.5% accuracy (A-grade), maintains 180 mV dropout at 200 mA load, and operates across −40°C to +125°C junction temperature for use in cellular phone baseband power rails.
For engineers reviewing the LP2987IM-3.2/NOPB datasheet, LP2987IM-3.2/NOPB pinout, LP2987IM-3.2/NOPB application, or LP2987IM-3.2/NOPB equivalent, key selection criteria include its SOIC-8 package, 2 μA shutdown quiescent current, 5% output undervoltage error flag, and single-capacitor power-on reset timing - all critical for battery-powered system power sequencing and rail integrity monitoring.
Technical Context
The LP2987IM-3.2/NOPB uses a vertically integrated PNP (VIP) pass transistor architecture enabling ultra-low dropout and stable operation with minimal external components. Its internal 1.23 V bandgap reference feeds both output regulation and error comparator circuitry, supporting precise 3.2 V output set by factory-trimmed resistive divider.
Power-on reset functionality is implemented via an internal 2.2 µA current source charging an external capacitor on the DELAY pin, while the open-collector ERROR pin asserts low when output falls >5% below nominal - providing reliable system-level reset signaling without additional logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2 V ±0.5% (A-grade) - ensures stable core voltage for 3.3 V–tolerant microcontrollers and analog ICs. |
| Max Continuous Output Current | 200 mA - sufficient for powering baseband processors, RF front-end bias, or sensor signal chains. |
| Dropout Voltage | 180 mV @ 200 mA - enables regulation from 3.38 V input, preserving battery runtime in single-cell Li-ion systems. |
| Quiescent Current | <2 µA in shutdown - minimizes standby leakage in always-on subsystems like real-time clocks or wake-up controllers. |
| Error Flag Threshold | −5% output deviation - triggers clean system reset before brownout-induced logic corruption occurs. |
| Input Voltage Range | 2.1 V to 16 V - supports wide-input applications including automotive accessory rails and industrial 12 V supplies. |
| Operating Temperature | −40°C to +125°C junction - qualified for under-hood, industrial control, and portable device thermal environments. |
Pinout & Package
LP2987IM-3.2/NOPB is housed in an 8-pin SOIC (D) surface-mount package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for 160°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BYPASS | Reference bypass node | Connects to 0.01 µF capacitor to reduce output noise; not used on LP2987 (only LP2988 variant). |
| DELAY | Reset timer capacitor node | Sinks 2.2 µA to ground until output stabilizes, then charges external capacitor to generate programmable POR delay. |
| GROUND | Power return path | Low-impedance analog ground reference for regulator feedback and error comparator; separate from digital ground. |
| INPUT | Unregulated input supply | Accepts 2.1 V–16 V; includes reverse-voltage protection diode (anode at VOUT, cathode at VIN) requiring external Schottky clamp if VOUT > VIN. |
| SENSE | Output voltage feedback | High-impedance sense input for remote sensing; tied to OUTPUT if local regulation is sufficient. |
| OUTPUT | Regulated 3.2 V output | Delivers up to 200 mA with <100 µV RMS noise (LP2987); requires ≥4.7 µF output capacitor with appropriate ESR. |
| SHUTDOWN | Enable/disable control | Active-high logic input; drives high (>1.6 V) to enable, low (<0.18 V) to enter sub-2 µA sleep mode. |
| ERROR | Open-collector fault flag | Pulls low when output drops >5% below 3.2 V; requires external pull-up resistor for reset signal generation. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Power-On Reset Delay | Single external capacitor on DELAY pin sets reset timeout from milliseconds to seconds - eliminates need for discrete RC timers or dedicated reset ICs. |
| Ultra-Low Dropout | 180 mV @ 200 mA enables operation from near-dead batteries or tightly regulated intermediate rails without headroom loss. |
| High Accuracy Output | ±0.5% over temperature ensures consistent performance for ADC references, PLL VCOs, and precision analog circuits. |
| Low Ground Pin Current | 1 mA @ 200 mA load - improves efficiency vs. traditional LDOs and reduces PCB trace heating in high-current paths. |
| Integrated Protection | Thermal shutdown and current limiting prevent damage during overload, short-circuit, or ambient overheating conditions. |
Applications
| Cellular Phone Baseband | Palmtop Computer Core Rail |
|---|---|
Use Scenario: Powering ARM-based application processor I/O and memory interface rails in dual-SIM smartphones. IC Role / Device Role / Timing Role: Primary 3.2 V LDO supplying SDIO, USB PHY, and camera interface logic with tight voltage tolerance. Use Value: 0.5% output accuracy prevents timing margin violations in high-speed digital interfaces; 180 mV dropout extends usable battery range by 5–8%. |
Use Scenario: Regulating 3.2 V for flash memory and touch controller in handheld PDAs with limited board space. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO delivering stable supply during deep-sleep wake-up sequences. Use Value: Sub-2 µA shutdown current reduces standby drain to <1 µA per rail; SOIC-8 footprint simplifies layout vs. smaller packages. |
| Camcorder Image Sensor Bias | Industrial Handheld Terminal |
Use Scenario: Providing clean 3.2 V bias to CMOS image sensor analog front-end and ADC reference in consumer camcorders. IC Role / Device Role / Timing Role: Precision voltage source with error flag monitoring supply integrity during video capture bursts. Use Value: −5% error threshold triggers immediate frame discard before corrupted pixel data is written to storage. |
Use Scenario: Powering barcode scanner ASIC and Bluetooth radio in ruggedized warehouse terminals operating at −25°C to +70°C ambient. IC Role / Device Role / Timing Role: Industrial-grade LDO with extended temperature support and robust reset signaling for firmware recovery. Use Value: −40°C to +125°C junction rating ensures reliability in uncontrolled environments; open-collector ERROR pin interfaces directly with MCU reset input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2987IM-3.3/NOPB | Fixed 3.3 V output; identical SOIC-8 package, pinout, and electrical specs except output voltage. | Used where system requires 3.3 V instead of 3.2 V - e.g., legacy FPGA I/O banks or standard logic families. | Select when target rail matches 3.3 V; no layout change needed, but verify downstream voltage tolerance margins. |
| TLV70733PDQNR | 300 mA output, 250 mV dropout @ 300 mA, 25 µA quiescent current, SOT-563 package (5-pin). | Higher current capability and smaller footprint, but lacks integrated POR delay and error flag functionality. | Choose for space-constrained designs needing higher current; add external reset IC if POR timing or fault signaling is required. |
Compared with LP2987IM-3.2/NOPB, the LP2987IM-3.3/NOPB offers identical functionality at 3.3 V with zero layout impact, while TLV70733PDQNR trades integrated reset features for higher current and smaller size - making it suitable only when external reset logic is acceptable.
Availability
LP2987IM-3.2/NOPB is available at Aetrix Electronics and suitable for cellular phone baseband, palmtop computer core rail, and camcorder image sensor bias applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LP2987IM-3.2/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 specializing in analog and embedded processing technologies, with leadership in power management innovation since the 1980s.
The LP2987 series was developed for portable electronics requiring micropower, ultra-low-dropout regulation with integrated power-on reset - targeting battery-operated devices where supply integrity and sequencing are critical.
FAQ
What is the maximum input voltage rating for LP2987IM-3.2/NOPB?
The LP2987IM-3.2/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 risks permanent damage; operation below 2.1 V prevents regulation. The device includes internal protection against reverse input-output voltage, but an external Schottky diode is required if VOUT may exceed VIN.
Does LP2987IM-3.2/NOPB support remote sensing?
Yes, LP2987IM-3.2/NOPB supports remote sensing via the SENSE pin, which provides high-impedance feedback to the internal error amplifier. When used, SENSE connects directly to the load-side of the output trace to compensate for IR drop; if unused, it must be tied to OUTPUT. This feature maintains ±0.5% output accuracy even with 100 mΩ PCB trace resistance.
How is the power-on reset delay time calculated for LP2987IM-3.2/NOPB?
The power-on reset delay time for LP2987IM-3.2/NOPB is set by an external capacitor on the DELAY pin using the formula CDLY = TDELAY / (5.59 × 10⁵), where CDLY is in farads and TDELAY in seconds. For example, a 100 nF capacitor yields ~56 ms delay. Maximum recommended CDLY is 1 µF; aluminum electrolytics are prohibited due to leakage.
What is the purpose of the ERROR pin on LP2987IM-3.2/NOPB?
The ERROR pin on LP2987IM-3.2/NOPB is an open-collector output that pulls low when the regulated 3.2 V output drops more than 5% below nominal (i.e., below 3.04 V). It serves dual roles: as a system fault indicator and as a power-on reset signal when paired with a pull-up resistor - enabling reliable boot sequencing without external supervisors.
Is LP2987IM-3.2/NOPB pin-compatible with LP2988 variants?
No, LP2987IM-3.2/NOPB is not pin-compatible with LP2988 variants. While both share the same SOIC-8 pinout and terminal functions, the LP2988 includes a dedicated BYPASS pin for noise reduction (requiring 0.01 µF capacitor), whereas LP2987 omits this pin - leaving it unconnected. Using LP2988 in place of LP2987IM-3.2/NOPB risks undefined behavior if BYPASS is left floating or improperly terminated.
LP2987IM-3.2/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):
- 3.2V
- 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-3.2/NOPB FAQ
1.How can I place an order for LP2987IM-3.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2987IM-3.2/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-3.2/NOPB reliable?
The price and inventory of LP2987IM-3.2/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-3.2/NOPB is usually 5 days.
3.What payment methods are accepted for LP2987IM-3.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2987IM-3.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2987IM-3.2/NOPB?
LP2987IM-3.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2987IM-3.2/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-3.2/NOPB?
For technical support, including LP2987IM-3.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2987IM-3.2/NOPB requirements.
6.How does Aetrix verify that LP2987IM-3.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2987IM-3.2/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-3.2/NOPB meets industry standards.
7.What is the process for return or replacement of LP2987IM-3.2/NOPB?
All LP2987IM-3.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2987IM-3.2/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-3.2/NOPB part is unused and in its original packaging.
Return procedure for LP2987IM-3.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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