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Texas Instruments LP2985AIM5X-2.6/NOPB
- Part No.:
- LP2985AIM5X-2.6/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2985AIM5X-2.6/NOPB.pdf
- Description:
- IC REG LINEAR 2.6V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
LP2985AIM5X-2.6/NOPB from Texas Instruments is a micropower, ultra-low-dropout linear regulator delivering 150 mA output current with 2.6 V fixed output voltage, 300 mV typical dropout at full load, 1% output accuracy (A-grade), and 30 µVRMS output noise (300 Hz–50 kHz) when using a 10-nF bypass capacitor - designed for battery-powered portable electronics requiring stable low-noise bias.
For engineers reviewing the LP2985AIM5X-2.6/NOPB datasheet, LP2985AIM5X-2.6/NOPB pinout, LP2985AIM5X-2.6/NOPB application, or LP2985AIM5X-2.6/NOPB equivalent, key selection criteria include guaranteed 150 mA load capability with <1 µA shutdown current, compatibility with ceramic output capacitors as low as 2.2 µF and 5 mΩ ESR, and ON/OFF logic control with 0.15 V low-threshold disable.
Technical Context
The LP2985AIM5X-2.6/NOPB uses a vertically integrated PNP (VIP) process to achieve ultra-low dropout (280–575 mV at 150 mA over temperature) and low ground current (850 µA typical at 150 mA). Its internal reference and feedback loop ensure 1% output voltage accuracy across –40°C to 125°C junction temperature and 1 mA–150 mA load range.
It integrates active ON/OFF control with hysteresis (1.6 V turn-on, 0.15 V turn-off), foldback short-circuit protection (400 mA steady-state, 350 mA peak), and thermal shutdown. The BYPASS pin enables external 10-nF capacitor connection to reduce output noise by filtering the internal reference, achieving 30 µVRMS performance without requiring high-ESR tantalum capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.6 V ±1% (A-grade) - ensures precise biasing for 2.5–2.7 V logic rails and RF front-end circuitry. |
| Max Output Current | 150 mA continuous - supports moderate-power microcontrollers, sensors, and analog signal chains in space-constrained designs. |
| Dropout Voltage | 280 mV typ. / 575 mV max at 150 mA - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) with margin. |
| Quiescent Current | 75 µA at 1 mA / 850 µA at 150 mA - minimizes battery drain in always-on or low-duty-cycle portable systems. |
| Shutdown Current | 0.01 µA typ. / ≤2 µA max - extends shelf life and standby time in battery-backed devices. |
| Output Noise | 30 µVRMS (300 Hz–50 kHz) with 10-nF BYPASS cap - meets low-noise requirements for ADC references, RF synthesizers, and audio codecs. |
| Stability Support | Stable with 2.2 µF ceramic output capacitor and ESR ≥5 mΩ - eliminates need for bulky/lossy tantalum caps and simplifies layout. |
Pinout & Package
SOT-23 (DBV) 5-pin package (2.90 mm × 1.60 mm), surface-mount, thermally enhanced for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2.5 V–16 V input; requires ≥1 µF ceramic input capacitor placed within 1 cm of pin for stability. |
| GND (Pin 2) | Ground reference | Device substrate connection; must be tied to clean analog ground plane to minimize noise coupling. |
| ON/OFF (Pin 3) | Enable/disable control input | Logic-high (>1.6 V) enables regulation; logic-low (<0.15 V) disables output and reduces IQ to ≤2 µA. |
| BYPASS (Pin 4) | Noise reduction node | Connects to GND via 10-nF ceramic capacitor to suppress internal reference noise and achieve 30 µVRMS output. |
| OUT (Pin 5) | Regulated output | Delivers 2.6 V ±1% at up to 150 mA; requires ≥2.2 µF ceramic output capacitor with ESR ≥5 mΩ for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout architecture | 300 mV typical at 150 mA enables use with single-cell Li-ion (3.0 V) while maintaining regulation down to 2.9 V input. |
| 1% A-grade output accuracy | Ensures reliable operation of 2.6 V I/O domains and precision analog circuits without post-regulation trimming. |
| Integrated ON/OFF control | Eliminates need for external enable logic or MOSFET switch, reducing BOM count and PCB area in power-managed systems. |
| Low-noise BYPASS functionality | Reduces output noise by >50% vs non-bypassed operation, enabling direct use in sensitive RF and high-resolution ADC applications. |
| Thermal + current protection | Foldback current limiting (400 mA SC limit) and thermal shutdown prevent damage during fault conditions without external components. |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 2.6 V LDO supplying ADC reference, op-amp bias, and BLE SoC I/O domain. Use Value: 30 µVRMS noise ensures <12-bit ENOB in 16-bit ADC; 150 mA headroom supports BLE transmit bursts without droop. |
Use Scenario: Optical heart-rate sensor with photodiode amplifier and MCU in wrist-worn form factor. IC Role / Device Role / Timing Role: Low-noise 2.6 V rail for transimpedance amplifier and optical driver stage. Use Value: 1% accuracy maintains consistent LED current calibration; SOT-23 footprint fits tight mechanical constraints. |
| Industrial Handheld Terminals | Smart Meter Communication Modules |
Use Scenario: Ruggedized barcode scanner with 2.6 V display interface and touch controller. IC Role / Device Role / Timing Role: Main system regulator powering display driver IC and capacitive touch ASIC. Use Value: 280 mV dropout allows operation from 3.0 V Li-ion battery throughout discharge curve; ON/OFF enables deep-sleep mode. |
Use Scenario: PLC-based smart meter with HPLC modem requiring clean 2.6 V supply for analog PHY layer. IC Role / Device Role / Timing Role: Isolated secondary-side LDO for HPLC line driver and receiver analog section. Use Value: Stability with 2.2 µF ceramic cap avoids ESR drift issues in wide-temperature field deployments; 125°C rating supports enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, micropower LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2602E/TT | 250 mA rated, 6 µA quiescent current, no BYPASS pin, 45 µVRMS noise, SOT-23-3 package (no ON/OFF or BYPASS). | Lacks enable and noise-reduction features; suitable only where shutdown and ultra-low noise are not required. | Choose if board space is critical and only basic 2.6 V regulation is needed - but cannot replace LP2985AIM5X-2.6/NOPB in noise-sensitive or power-gated designs. |
| TPS78026DRVR | 200 mA rated, 500 nA quiescent current, 30 µVRMS noise, BYPASS pin, WSON-6 package (0.8 mm × 0.8 mm), 200 mV dropout at 150 mA. | Smaller footprint and lower IQ, but requires 1 µF minimum output capacitance and has different pinout; no SOT-23 option. | Prefer for ultra-low-power wearables where size and standby current dominate - but requires PCB redesign due to non-SOT-23 footprint and different terminal mapping. |
Compared with MCP1700T-2602E/TT and TPS78026DRVR, the LP2985AIM5X-2.6/NOPB uniquely combines SOT-23-5 packaging, integrated ON/OFF control, 1% A-grade accuracy, and proven 30 µVRMS noise performance - making it the only drop-in solution for legacy space-constrained designs requiring all three features.
Availability
LP2985AIM5X-2.6/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, industrial handheld terminals, and smart meter communication modules requiring stable component supply, long-lifecycle support, and guaranteed A-grade parametric performance.
Supply support for LP2985AIM5X-2.6/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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management IC design and manufacturing.
The LP2985-N product line was engineered specifically for battery-powered portable electronics - emphasizing micropower operation, ultra-low dropout, low noise, and robust integration in minimal-footprint packages like SOT-23.
FAQ
What is the maximum input voltage rating for the LP2985AIM5X-2.6/NOPB?
The LP2985AIM5X-2.6/NOPB has an absolute maximum input voltage rating of 16 V and a recommended operating input range of 3.1 V to 16 V. Operation below 3.1 V may result in dropout or loss of regulation, especially under 150 mA load. The device survives reverse-polarity conditions up to –0.3 V on the IN pin, but sustained negative input is not recommended.
Does the LP2985AIM5X-2.6/NOPB require an external bypass capacitor to achieve its specified 30 µVRMS noise performance?
Yes - the LP2985AIM5X-2.6/NOPB achieves its 30 µVRMS output noise (300 Hz–50 kHz) only when a 10-nF ceramic capacitor is connected between the BYPASS pin and GND. Without this capacitor, typical output noise rises to approximately 75 µVRMS. The capacitor must be low-leakage (e.g., X7R or C0G dielectric) and placed adjacent to the BYPASS and GND pins.
Can the LP2985AIM5X-2.6/NOPB operate stably with a 2.2 µF ceramic output capacitor?
Yes - the LP2985AIM5X-2.6/NOPB is explicitly characterized and guaranteed stable with ceramic output capacitors as low as 2.2 µF and ESR values down to 5 mΩ. This eliminates dependency on higher-ESR tantalum capacitors and supports compact, high-reliability designs. Larger capacitance values (e.g., 4.7 µF or 10 µF) are acceptable and improve transient response.
What is the ON/OFF pin threshold voltage specification for enabling the LP2985AIM5X-2.6/NOPB?
The LP2985AIM5X-2.6/NOPB enables regulation when the ON/OFF pin voltage exceeds 1.6 V (min) over temperature, and disables output when pulled below 0.15 V (max). The pin draws only 0.01 µA typical leakage current when held at 0 V, supporting direct connection to GPIOs or open-drain logic without pull-up resistors in many cases.
Is the LP2985AIM5X-2.6/NOPB RoHS-compliant and lead-free?
Yes - the LP2985AIM5X-2.6/NOPB carries the /NOPB suffix, indicating it is lead-free, RoHS-compliant, and manufactured per TI's green packaging standards. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is compatible with standard SnPb and lead-free reflow profiles.
LP2985AIM5X-2.6/NOPB 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):
- 2.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.58V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- 2.5 mA
- PSRR:
- 45dB (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
LP2985AIM5X-2.6/NOPB FAQ
1.How can I place an order for LP2985AIM5X-2.6/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2985AIM5X-2.6/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 LP2985AIM5X-2.6/NOPB reliable?
The price and inventory of LP2985AIM5X-2.6/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2985AIM5X-2.6/NOPB is usually 5 days.
3.What payment methods are accepted for LP2985AIM5X-2.6/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2985AIM5X-2.6/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2985AIM5X-2.6/NOPB?
LP2985AIM5X-2.6/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2985AIM5X-2.6/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 LP2985AIM5X-2.6/NOPB?
For technical support, including LP2985AIM5X-2.6/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2985AIM5X-2.6/NOPB requirements.
6.How does Aetrix verify that LP2985AIM5X-2.6/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2985AIM5X-2.6/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 LP2985AIM5X-2.6/NOPB meets industry standards.
7.What is the process for return or replacement of LP2985AIM5X-2.6/NOPB?
All LP2985AIM5X-2.6/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2985AIM5X-2.6/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 LP2985AIM5X-2.6/NOPB part is unused and in its original packaging.
Return procedure for LP2985AIM5X-2.6/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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