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Texas Instruments LP2992IM5-1.5
- Part No.:
- LP2992IM5-1.5
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2992IM5-1.5.pdf
- Description:
- IC REG LINEAR 1.5V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,364
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Product details
Overview
LP2992IM5-1.5 from Texas Instruments is a fixed-output, micropower, ultra-low-dropout linear regulator in SOT-23-5 (DBV) package, delivering up to 250mA with ±0.5% output accuracy (new chip), 30μVRMS output noise (with 10nF bypass capacitor), and 70dB PSRR at 1kHz. It operates from 2.5V to 16V input and regulates precisely to 1.5V for low-voltage microcontrollers and noise-sensitive analog circuitry.
For engineers reviewing the LP2992IM5-1.5 datasheet, LP2992IM5-1.5 pinout, LP2992IM5-1.5 application, or LP2992IM5-1.5 equivalent, key selection criteria include dropout voltage at 250mA (225mV max over temperature), shutdown current (1.12μA typ), stability with 2.2µF ceramic output capacitors, and thermal performance in the 2.9mm × 2.8mm SOT-23 package.
Technical Context
The LP2992IM5-1.5 uses a CMOS pass transistor architecture with internal bandgap reference and error amplifier, enabling ultra-low dropout and high PSRR. Its BYPASS pin connects to an external 10nF capacitor to reduce reference noise, directly lowering integrated output noise to 30μVRMS across 300Hz–50kHz.
It integrates active-high enable (ON/OFF pin), thermal shutdown, current limiting, and internal output pulldown during disable. Soft-start minimizes inrush current, and operation over –40°C to +125°C junction temperature supports industrial and automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±0.5% (new chip) - ensures stable core supply for 1.5V logic and low-power MCUs without external feedback. |
| Max Output Current | 250mA - sufficient to power multiple peripheral blocks or a single-core MCU with RF interface. |
| Dropout Voltage | 225mV max at 250mA and –40°C to +125°C - enables regulation from 1.725V input, critical for battery-powered systems near end-of-life. |
| Ground Pin Current | 875μA typ at 250mA load - contributes <0.22mW quiescent loss at 250mA, supporting micropower system budgets. |
| PSRR | 70dB at 1kHz, 40dB at 1MHz - suppresses switching noise from upstream DC/DC converters, reducing need for post-regulator LC filtering. |
| Output Noise | 30μVRMS (300Hz–50kHz, 10nF BYPASS) - meets stringent noise requirements for ADC references and RF bias rails. |
| Input Voltage Range | 2.5V to 16V - accommodates wide-input industrial supplies, 12V bus derivatives, and Li-ion/LiPo battery stacks (2S–4S). |
Pinout & Package
LP2992IM5-1.5 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, optimized for space-constrained PCB layouts and thermal dissipation via GND pin and exposed pad (though DBV lacks thermal pad; NGD/WSON variant does).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 2.5V–16V; requires ≥1µF ceramic capacitor to GND for stability and transient response. |
| OUT (Pin 5) | Regulated output | Delivers fixed 1.5V; stable with ≥2.2µF ceramic capacitor (ESR ≤1Ω) to GND. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must be low-impedance plane for noise control. |
| ON/OFF (Pin 3) | Enable control input | Active-high: >0.85V enables regulator; <0.15V disables it with internal pulldown to discharge OUT. |
| BYPASS (Pin 4) | Noise reduction node | Connects to 10nF capacitor to GND to filter bandgap reference noise, enabling 30μVRMS output noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30μVRMS output noise with 10nF BYPASS cap - eliminates need for additional RC filtering in precision analog signal chains. |
| Micropower quiescent operation | 69μA IQ at zero load - extends battery life in always-on sensor nodes and IoT endpoints. |
| Wide-input, fixed-output LDO | 2.5V–16V input range with 1.5V fixed output - simplifies BOM by removing external resistor network and improves accuracy vs adjustable regulators. |
| High PSRR at switching frequencies | 70dB @ 1kHz, 40dB @ 1MHz - effectively attenuates ripple from buck converters operating at 500kHz–2MHz, enabling clean mixed-signal power domains. |
| Thermal and current protection | Integrated thermal shutdown and foldback current limit - prevents damage during overload or poor heatsinking in enclosed industrial enclosures. |
Applications
| Washers and Dryers | Land Mobile Radios |
|---|---|
Use Scenario: Mainboard power rail for MCU, display controller, and motor driver logic in home appliance control modules. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying core voltage to 32-bit ARM-based MCU and I/O peripherals. Use Value: Ultra-low dropout ensures regulation down to 1.725V input, maintaining operation during brownout events on 3.3V auxiliary rail derived from mains rectification. | Use Scenario: Bias supply for RF front-end ICs and low-noise amplifiers in portable two-way radios. IC Role / Device Role / Timing Role: Clean 1.5V analog rail decoupled from noisy digital domains using BYPASS capacitor. Use Value: 30μVRMS noise and 70dB PSRR prevent AM/PM distortion in VHF/UHF transmit paths, meeting FCC spectral mask requirements. |
| Active Antenna System mMIMO | Cordless Power Tools |
Use Scenario: Per-element LDO for beamforming IC biasing in compact 5G base station antenna arrays. IC Role / Device Role / Timing Role: Local 1.5V supply for GaN driver bias and phase shifter control logic in thermally dense RF modules. Use Value: SOT-23-5 footprint and 178.6°C/W θJA enable direct mounting on RF PCB layers with minimal thermal vias, avoiding thermal runaway at +125°C ambient. | Use Scenario: MCU and sensor supply in brushless motor control boards powered by 18V Li-ion packs. IC Role / Device Role / Timing Role: Secondary regulated rail stepping down from 3.3V or 5V intermediate bus to 1.5V logic level. Use Value: 250mA capability supports simultaneous operation of MCU, Hall sensors, and CAN transceiver, while 1.12μA shutdown current preserves battery charge during storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSS721AIDBVR | Fixed 1.5V output, 250mA, ±2% accuracy, higher IQ (120μA), no BYPASS pin, 65dB PSRR @ 1kHz | Lacks ultra-low-noise capability; suitable only where 30μVRMS is not required | Choose when cost is primary constraint and noise sensitivity is low; verify thermal derating at full load. |
| MCP1703T-1502E/MB | Fixed 1.5V, 250mA, ±1% accuracy, 4μA IQ, but 350mV dropout at 250mA and limited PSRR (55dB @ 1kHz) | Higher dropout limits use with low-input batteries; lower PSRR increases need for external filtering | Select for ultra-low-power sleep modes; avoid in noise-critical or wide-input-range designs. |
Compared with TSS721AIDBVR and MCP1703T-1502E/MB, LP2992IM5-1.5 uniquely delivers ±0.5% accuracy, 30μVRMS noise, and 70dB PSRR in the same SOT-23-5 footprint-enabling higher system-level signal integrity without layout or BOM overhead.
Availability
LP2992IM5-1.5 is available at Aetrix Electronics and suitable for washers and dryers, land mobile radios, and active antenna system mMIMO requiring stable component supply, long-term industrial lifecycle support, and consistent parametric performance across temperature.
Supply support for LP2992IM5-1.5 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 heritage and broad industrial qualification.
The LP2992 product line was engineered for noise-sensitive, wide-input industrial and portable applications demanding micropower operation, ultra-low dropout, and high PSRR-targeting MCU cores, RF bias, and precision analog subsystems.
FAQ
What is the guaranteed output voltage tolerance for LP2992IM5-1.5 across temperature and load?
The LP2992IM5-1.5 guarantees ±0.5% output voltage accuracy over load (1mA–250mA) and temperature (–40°C to +125°C), per TI's "new chip" specification. This exceeds legacy-grade variants (±1.5%) and ensures reliable operation for 1.5V-core MCUs without margining overhead.
Can LP2992IM5-1.5 operate stably with a 1µF output capacitor?
No. LP2992IM5-1.5 requires a minimum 2.2µF ceramic output capacitor for stability, as confirmed in Section 5.3 Recommended Operating Conditions. Using 1µF violates the 50% derating rule and risks oscillation; 2.2µF–4.7µF X7R/X5R MLCCs are validated.
What is the maximum allowable ESR for the output capacitor used with LP2992IM5-1.5?
The maximum supported ESR for the output capacitor is 1Ω, specified for the new chip revision. Capacitors exceeding this value require a parallel 100nF MLCC placed adjacent to the OUT pin to maintain loop stability and transient response.
Does LP2992IM5-1.5 include thermal shutdown protection?
Yes. LP2992IM5-1.5 integrates thermal shutdown protection that disables the output when junction temperature exceeds safe limits, then automatically recovers upon cooling. This is documented in Features and Section 6.3.4 of the datasheet.
How does the BYPASS pin function in LP2992IM5-1.5, and what capacitor value is recommended?
The BYPASS pin in LP2992IM5-1.5 connects to a 10nF capacitor to GND to filter the internal bandgap reference voltage, directly reducing output noise to 30μVRMS. Values less than 10nF degrade noise performance; larger values offer diminishing returns and may affect startup time.
LP2992IM5-1.5 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.85V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- 4 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
LP2992IM5-1.5 FAQ
1.How can I place an order for LP2992IM5-1.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2992IM5-1.5 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 LP2992IM5-1.5 reliable?
The price and inventory of LP2992IM5-1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2992IM5-1.5 is usually 5 days.
3.What payment methods are accepted for LP2992IM5-1.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992IM5-1.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2992IM5-1.5?
LP2992IM5-1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2992IM5-1.5 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 LP2992IM5-1.5?
For technical support, including LP2992IM5-1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992IM5-1.5 requirements.
6.How does Aetrix verify that LP2992IM5-1.5 is sourced from the original manufacturer or authorized distributors?
All LP2992IM5-1.5 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 LP2992IM5-1.5 meets industry standards.
7.What is the process for return or replacement of LP2992IM5-1.5?
All LP2992IM5-1.5 units undergo pre-shipment inspection (PSI). If there is an issue with LP2992IM5-1.5, 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 LP2992IM5-1.5 part is unused and in its original packaging.
Return procedure for LP2992IM5-1.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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