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Texas Instruments LP2985AIM5-5.7/NOPB
- Part No.:
- LP2985AIM5-5.7/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2985AIM5-5.7/NOPB.pdf
- Description:
- IC REG LINEAR 5.7V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
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Product details
Overview
LP2985AIM5-5.7/NOPB from Texas Instruments is a micropower, ultra-low-dropout linear regulator delivering 150 mA output current with 5.7 V fixed output voltage, 1% accuracy (A-grade), 300 mV typical dropout at full load, and 30 µVRMS output noise (300 Hz–50 kHz) when using a 10-nF bypass capacitor. It operates from 2.5 V to 16 V input and targets battery-powered portable electronics requiring stable low-noise bias.
For engineers reviewing the LP2985AIM5-5.7/NOPB datasheet, LP2985AIM5-5.7/NOPB pinout, LP2985AIM5-5.7/NOPB application, or LP2985AIM5-5.7/NOPB equivalent, key selection criteria include dropout performance at 150 mA, shutdown quiescent current (<2 µA), ceramic-capacitor stability down to 5 mΩ ESR, and ON/OFF logic control compatibility with 1.6 V enable threshold.
Technical Context
The LP2985AIM5-5.7/NOPB uses a vertically integrated PNP (VIP) process to achieve ultra-low dropout and minimal ground current-75 µA at 1 mA and 850 µA at 150 mA load. Its internal reference and feedback loop ensure 1% output voltage accuracy across –40°C to 125°C junction temperature.
It integrates active ON/OFF control with 0.15 V max disable threshold and 1.6 V min enable threshold, enabling precise power sequencing. The BYPASS pin supports external 10-nF capacitor connection to reduce output noise to 30 µVRMS, while foldback current limiting and thermal shutdown provide robust fault protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.7 V ±1% (A-grade); ensures stable logic-level supply for 5-V–compatible peripherals without external feedback. |
| Max Output Current | 150 mA continuous; sufficient for powering microcontrollers, sensors, or RF front-ends in compact portable systems. |
| Dropout Voltage | 575 mV max at 150 mA/125°C; enables operation from single-cell Li-ion (3.0 V min) or 2-cell alkaline (3.2 V min) with margin. |
| Quiescent Current | 75 µA at 1 mA load; minimizes standby power loss in always-on subsystems like real-time clocks or wake-up circuits. |
| Shutdown Current | 0.01 µA typical; extends battery life during deep-sleep modes in handheld devices. |
| Output Noise | 30 µVRMS (300 Hz–50 kHz) with 10-nF BYPASS cap; meets low-noise requirements for ADC references or audio bias rails. |
| PSRR | 45 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Stable ESR Range | As low as 5 mΩ; allows use of small, low-cost X7R/X5R ceramic capacitors (e.g., 2.2 µF 0603) without phase-margin risk. |
Pinout & Package
SOT-23 (DBV) 5-pin package: 2.90 mm × 1.60 mm body size, surface-mount, thermally enhanced for PCB heat dissipation. Pin 1 = IN, Pin 2 = GND, Pin 3 = ON/OFF, Pin 4 = BYPASS, Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2.5 V–16 V unregulated input; requires ≥1 µF ceramic decoupling within 1 cm for stability. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must connect to low-impedance analog ground plane. |
| ON/OFF (Pin 3) | Enable/disable logic input | Active-high control: <0.15 V disables (≤2 µA IQ), >1.6 V enables; requires external pull-up if unused. |
| BYPASS (Pin 4) | Noise reduction node | Connects to GND via 10-nF ceramic capacitor to shunt reference noise; omission increases output noise to ~100 µVRMS. |
| OUT (Pin 5) | Regulated output | Delivers 5.7 V ±1% to load; requires ≥2.2 µF ceramic output capacitor with ESR ≤50 mΩ for full-load stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 300 mV typical at 150 mA enables high-efficiency regulation from marginal input sources like aging batteries. |
| Low-noise architecture | Integrated low-noise reference + BYPASS pin support achieves 30 µVRMS noise-critical for precision analog signal chains. |
| Micro-power shutdown | 0.01 µA typical shutdown current preserves battery capacity in long-idle portable instruments and wearables. |
| Ceramic-capacitor optimized | Stable with 5 mΩ ESR output caps eliminates need for bulkier, higher-ESR tantalum or electrolytic capacitors. |
| Integrated protection | Foldback current limiting and thermal shutdown prevent damage during short-circuit or overload events without external circuitry. |
| Wide temperature range | Specified from –40°C to 125°C junction temperature supports automotive cabin, industrial, and outdoor deployment. |
Applications
| Cellular Modem Power | Portable Medical Sensor Bias |
|---|---|
Use Scenario: Powers LTE/5G modem ICs in compact IoT trackers where input is derived from a 3.7 V Li-ion cell with variable voltage (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary 5.7 V LDO providing clean, regulated supply to modem RF section and baseband processor. Use Value: 300 mV dropout ensures regulation remains active down to 3.0 V cell voltage; 30 µVRMS noise prevents bit errors in sensitive RF receivers. | Use Scenario: Supplies analog front-end (AFE) and low-noise amplifier (LNA) in handheld ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Low-noise bias rail generator for precision instrumentation amplifiers and 16-bit ADC reference buffers. Use Value: 1% output accuracy maintains measurement linearity; BYPASS-enabled 30 µVRMS noise avoids signal-to-noise degradation in sub-mV bio-potential signals. |
| Industrial Handheld Terminal | Smart Home Hub MCU Core |
Use Scenario: Powers ARM Cortex-M7 MCU and display driver in ruggedized warehouse scanners operating across –20°C to 70°C ambient. IC Role / Device Role / Timing Role: Main system regulator delivering 5.7 V to MCU I/O banks and interface peripherals (USB, UART, SPI). Use Value: 125°C junction rating and thermal shutdown ensure reliability under sustained CPU load; ON/OFF pin enables firmware-controlled power cycling. | Use Scenario: Provides 5.7 V core supply to Wi-Fi SoC and memory in battery-backed smart home hubs with always-on listening capability. IC Role / Device Role / Timing Role: Always-on LDO supplying standby logic and wake-up interrupt controller during deep-sleep mode. Use Value: 75 µA quiescent current at 1 mA load minimizes battery drain; 0.01 µA shutdown current extends 10-year coin-cell life in maintenance-free installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, ultra-low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7605CDR | 5.0 V fixed output, 150 mA, 25 µVRMS noise, but no ON/OFF pin; SOT-23-5 package. | Lacks enable control-requires external MOSFET for power gating; better noise performance but less flexible sequencing. | Select when absolute lowest noise is critical and enable functionality is handled externally. |
| MCP1703T-5002E/MB | 5.0 V fixed output, 250 mA, 1% accuracy, 600 mV dropout at 250 mA, no BYPASS pin, SOT-23-5. | Higher dropout and no noise-reduction pin limits use in low-headroom or ultra-low-noise designs; higher current rating suits heavier loads. | Select when higher output current is needed and 5.0 V (not 5.7 V) matches system rail requirements. |
Compared with TLC7605CDR and MCP1703T-5002E/MB, the LP2985AIM5-5.7/NOPB uniquely combines 5.7 V output, ON/OFF control, and BYPASS-enabled 30 µVRMS noise in a single SOT-23-5 package-making it optimal for space-constrained, battery-powered systems requiring precise voltage and low-noise bias with intelligent power management.
Availability
LP2985AIM5-5.7/NOPB is available at Aetrix Electronics and suitable for cellular modems, portable medical sensors, industrial handheld terminals, and smart home hub MCUs requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for LP2985AIM5-5.7/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 leadership in power management ICs.
The LP2985-N product line delivers micropower, ultra-low-dropout regulators optimized for battery-powered portable electronics-prioritizing low noise, minimal quiescent current, ceramic-capacitor compatibility, and robust thermal/overcurrent protection.
FAQ
What is the minimum input voltage required for LP2985AIM5-5.7/NOPB to regulate 5.7 V at 150 mA?
The LP2985AIM5-5.7/NOPB requires a minimum input voltage of 6.275 V to maintain regulation at 150 mA load, based on its maximum dropout voltage of 575 mV over temperature. At room temperature, typical dropout is 300 mV, so 6.0 V input suffices. Input below 6.275 V causes output to droop proportionally.
Can LP2985AIM5-5.7/NOPB operate with a 2.2 µF ceramic output capacitor?
Yes-the LP2985AIM5-5.7/NOPB is explicitly designed to be stable with ceramic output capacitors as low as 2.2 µF and ESR down to 5 mΩ. This eliminates the need for larger, higher-ESR tantalum or aluminum electrolytic capacitors and supports miniaturized PCB layouts.
How does the BYPASS pin on LP2985AIM5-5.7/NOPB reduce output noise?
The BYPASS pin connects to an internal low-noise reference; adding a 10-nF ceramic capacitor between BYPASS and GND filters reference noise, reducing total output noise from ~100 µVRMS to 30 µVRMS (300 Hz–50 kHz). Omitting this capacitor degrades noise performance but does not affect regulation.
What is the ON/OFF pin logic threshold for enabling LP2985AIM5-5.7/NOPB?
The LP2985AIM5-5.7/NOPB enables when the ON/OFF pin voltage exceeds 1.6 V (min) at full temperature range; it disables when pulled below 0.15 V (max). A direct connection to VIN satisfies the enable threshold for most 5-V–compatible systems, and a 100-kΩ pull-down resistor ensures reliable disable at power-up.
Is LP2985AIM5-5.7/NOPB suitable for automotive applications?
The LP2985AIM5-5.7/NOPB is rated for –40°C to 125°C junction temperature and includes overtemperature and overcurrent protection, making it suitable for under-hood or cabin automotive modules. However, it is not AEC-Q100 qualified; for safety-critical automotive use, consult TI's automotive-grade alternatives.
LP2985AIM5-5.7/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 5.7V
- 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
LP2985AIM5-5.7/NOPB FAQ
1.How can I place an order for LP2985AIM5-5.7/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2985AIM5-5.7/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 LP2985AIM5-5.7/NOPB reliable?
The price and inventory of LP2985AIM5-5.7/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2985AIM5-5.7/NOPB is usually 5 days.
3.What payment methods are accepted for LP2985AIM5-5.7/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2985AIM5-5.7/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2985AIM5-5.7/NOPB?
LP2985AIM5-5.7/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2985AIM5-5.7/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 LP2985AIM5-5.7/NOPB?
For technical support, including LP2985AIM5-5.7/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2985AIM5-5.7/NOPB requirements.
6.How does Aetrix verify that LP2985AIM5-5.7/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2985AIM5-5.7/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 LP2985AIM5-5.7/NOPB meets industry standards.
7.What is the process for return or replacement of LP2985AIM5-5.7/NOPB?
All LP2985AIM5-5.7/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2985AIM5-5.7/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 LP2985AIM5-5.7/NOPB part is unused and in its original packaging.
Return procedure for LP2985AIM5-5.7/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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