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Texas Instruments LP2983IM5X-1.2/NOPB
- Part No.:
- LP2983IM5X-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2983IM5X-1.2/NOPB.pdf
- Description:
- IC REG LINEAR 1.2V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,551
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Product details
Overview
LP2983IM5X-1.2/NOPB from Texas Instruments is a micropower 150-mA low-dropout linear voltage regulator in SOT-23-5 package, delivering a fixed 1.2 V output with ±1% accuracy (A-grade), stable operation with zero-ESR ceramic capacitors, and ON/OFF control for power sequencing in space-constrained portable electronics.
For engineers reviewing the LP2983IM5X-1.2/NOPB datasheet, LP2983IM5X-1.2/NOPB pinout, LP2983IM5X-1.2/NOPB application, or LP2983IM5X-1.2/NOPB equivalent, key selection criteria include dropout performance at 1.2 V output, ground current <1 µA in shutdown, thermal protection behavior, and ESR pin configuration for ceramic capacitor stability.
Technical Context
The LP2983IM5X-1.2/NOPB uses a vertically integrated PNP pass transistor architecture enabling ultra-low ground current (75 µA at 1 mA load, 825 µA at 150 mA) and high PSRR (65 dB at 1 kHz). Its dedicated ESR pin (Pin 4) provides direct low-impedance return for ceramic output capacitors, eliminating ESR dependency for stability.
It features logic-controlled ON/OFF functionality (active-high enable, 1.4 V min turn-on at 25°C), overtemperature and foldback overcurrent protection, and operates across −40°C to +125°C junction temperature with input range 2.2 V to 16 V - supporting both battery-backed and wide-input industrial rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% (A-grade, 25°C, 1–50 mA load) |
| Max Output Current | 150 mA continuous; peak 250 mA (VOUT ≥ 1.14 V) |
| Input Voltage Range | 2.2 V to 16 V operating; supports single-cell Li-ion up to 4S battery inputs |
| Ground Current | 75 µA at 1 mA load; 825 µA at 150 mA load; ≤12 µA in shutdown |
| Output Capacitor Support | Stable with 2.2 µF ceramic capacitor connected between OUT and ESR pins (ESR = 0 Ω supported) |
| Thermal Protection | Internal thermal shutdown activates at ~160°C junction; cycles on/off until safe dissipation resumes |
| PSRR | 65 dB at 1 kHz (1 V ripple rejection into 1.2 V output) |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant, lead-free (NOPB suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.2–16 V; internal reverse-voltage diode requires external Schottky clamp if VOUT > VIN |
| 2 - GND | Power ground reference | Device substrate connection; common return for IN, ON/OFF, and ESR paths |
| 3 - ON/OFF | Enable control input | Active-high logic: ≥1.4 V (25°C) enables regulation; ≤0.1 V disables output and reduces IGND to ≤12 µA |
| 4 - ESR | Low-ESR capacitor return | Dedicated terminal for ceramic output capacitor negative terminal - critical for zero-ESR stability |
| 5 - OUT | Regulated output | Delivers 1.2 V ±1% at up to 150 mA; must connect ceramic capacitor between OUT and ESR pins |
Key Features
| Feature | Design Value |
|---|---|
| Zero-ESR ceramic capacitor support | Enables use of compact, low-cost X7R/Z5U ceramics without oscillation risk - eliminates tantalum dependency |
| Micropower shutdown mode | Reduces total system quiescent current to ≤12 µA, extending battery life in always-on sensor nodes |
| High-accuracy 1.2 V reference | ±1% tolerance over temperature and load enables direct powering of core logic (e.g., ARM Cortex-M0+ I/O domains) |
| Optimized PNP pass element | Delivers 0.3 Ω typical output impedance (10 Hz–1 MHz), improving transient response vs. NMOS LDOs |
| Integrated protection | Auto-recovering thermal shutdown and foldback current limiting prevent damage during short-circuit or overload |
Applications
| Cellular Phone Baseband | Wearable Health Sensor |
|---|---|
|
Use Scenario: Powering RF transceiver analog front-end and baseband processor I/O banks in LTE/5G handsets. IC Role / Device Role / Timing Role: Primary 1.2 V LDO for digital core and analog bias rails, synchronized via ON/OFF to modem sleep states. Use Value: 825 µA ground current at full load minimizes battery drain during active transmission; zero-ESR stability ensures clean supply under fast RF load transients. |
Use Scenario: Supplying ultra-low-power MCU, optical heart-rate sensor, and BLE radio in fitness bands. IC Role / Device Role / Timing Role: Always-on 1.2 V rail with ON/OFF controlled by host MCU to gate power to peripheral sensors during deep-sleep cycles. Use Value: ≤12 µA shutdown current extends coin-cell battery life beyond 12 months; SOT-23-5 footprint fits sub-10 mm² PCB area constraints. |
| Industrial IoT Edge Node | Medical Point-of-Care Monitor |
|
Use Scenario: Regulating 1.2 V for microcontroller, ADC, and isolated CAN transceiver in battery- or energy-harvesting powered edge devices. IC Role / Device Role / Timing Role: Input-tolerant LDO accepting wide 2.2–16 V input (e.g., 12 V field bus or supercap backup), with ON/OFF coordinated to wireless wake-up events. Use Value: 16 V max input withstands load-dump transients; thermal protection prevents failure during extended ambient temperature excursions (−40°C to +125°C). |
Use Scenario: Providing precision 1.2 V supply to clinical-grade analog signal chain (ECG amplifier, 24-bit sigma-delta ADC) in portable diagnostic tools. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage source replacing discrete references; ESR pin routing minimizes noise coupling into sensitive analog ground. Use Value: 60 µV RMS output noise (300 Hz–50 kHz) and 65 dB PSRR suppress switching noise from adjacent DC/DC converters, preserving ADC ENOB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-ESR LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGQ | 7-channel 150-mA sink driver with integrated 1.2 V LDO; no ESR pin; 2% output tolerance | Designed for LED/relay driving with auxiliary LDO; not optimized for standalone precision regulation | Select only when multi-channel sinking and integrated LDO are required in same package |
| MCP1804T-1202I/OT | 150-mA LDO in SOT-23-5; 1.2 V ±2%; requires minimum 1 µF ceramic output cap but no ESR pin | Lacks dedicated ESR pin - less robust with ultra-low-ESR ceramics; higher ground current (120 µA @ 1 mA) | Use where cost sensitivity outweighs need for zero-ESR guarantee and lowest quiescent current |
Compared with TPL7407LPGQ and MCP1804T-1202I/OT, the LP2983IM5X-1.2/NOPB uniquely delivers A-grade 1% accuracy, dedicated ESR pin for guaranteed zero-ESR stability, and sub-100 µA ground current at light loads - making it optimal for battery-critical, noise-sensitive 1.2 V core supplies.
Availability
LP2983IM5X-1.2/NOPB is available at Aetrix Electronics and suitable for cellular phone baseband, wearable health sensor, and industrial IoT edge node designs requiring stable component supply with long-term manufacturability and automotive-grade temperature support.
Supply support for LP2983IM5X-1.2/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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and system-on-chip solutions for industrial, automotive, and personal electronics markets.
The LP2983IM5X-1.2/NOPB belongs to TI's micropower LDO family engineered specifically for ultra-low-noise, low-ESR ceramic-capacitor-based regulation in space- and power-constrained portable systems.
FAQ
What is the minimum input voltage required for LP2983IM5X-1.2/NOPB to regulate 1.2 V output?
The LP2983IM5X-1.2/NOPB requires a minimum input voltage of 2.05 V at 25°C and 2.2 V across −40°C to +125°C to maintain regulation. This corresponds to a typical dropout voltage of ~850 mV at full 150 mA load, enabling operation from single-cell Li-ion (2.7–4.2 V) and NiMH batteries. The device will enter dropout if VIN falls below this threshold, causing VOUT to track VIN minus dropout loss.
How does the ESR pin (Pin 4) function in the LP2983IM5X-1.2/NOPB circuit layout?
The ESR pin (Pin 4) on the LP2983IM5X-1.2/NOPB serves as the dedicated low-impedance return path for the output capacitor's negative terminal. It must be connected directly to the ceramic capacitor's cathode (or ground side), while the capacitor's anode connects to the OUT pin (Pin 5). This separates the ESR sensing path from the main GND plane, enabling stable operation even with 0 Ω ESR ceramics - a requirement not met by standard LDOs.
Can LP2983IM5X-1.2/NOPB be used with tantalum output capacitors?
No - the LP2983IM5X-1.2/NOPB is explicitly designed for ceramic output capacitors connected between OUT and ESR pins. Tantalum capacitors introduce ESR that destabilizes the control loop and violates the zero-ESR stability guarantee. Using tantalum may cause oscillation or poor transient response. TI specifies minimum 2.2 µF ceramic (X7R or Z5U) with proper derating for temperature - tantalum alternatives are not supported.
What happens to LP2983IM5X-1.2/NOPB during reverse input-output voltage conditions?
If VOUT exceeds VIN by more than ~0.7 V (e.g., during hot-swap or battery backup scenarios), the internal PNP pass transistor's inherent collector-base diode becomes forward-biased, allowing reverse current flow. This can trigger parasitic SCR latch-up and permanent damage. To prevent this, TI mandates an external Schottky diode (cathode to IN, anode to OUT) to clamp reverse voltage to <0.3 V - a requirement explicitly stated in the LP2983IM5X-1.2/NOPB datasheet Absolute Maximum Ratings.
Is LP2983IM5X-1.2/NOPB qualified for automotive applications?
The LP2983IM5X-1.2/NOPB is rated for −40°C to +125°C junction temperature and meets JEDEC JESD22-A108 reliability standards, but it is not AEC-Q200 qualified. It is suitable for industrial and consumer applications within that temperature range, including harsh-environment non-safety-critical systems. For automotive safety-critical functions (e.g., ADAS, powertrain), TI recommends AEC-Q100-qualified alternatives such as the TPS7A05 series.
LP2983IM5X-1.2/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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- 2 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:
- SOT-23-5
LP2983IM5X-1.2/NOPB FAQ
1.How can I place an order for LP2983IM5X-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2983IM5X-1.2/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 LP2983IM5X-1.2/NOPB reliable?
The price and inventory of LP2983IM5X-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2983IM5X-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LP2983IM5X-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2983IM5X-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2983IM5X-1.2/NOPB?
LP2983IM5X-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2983IM5X-1.2/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 LP2983IM5X-1.2/NOPB?
For technical support, including LP2983IM5X-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2983IM5X-1.2/NOPB requirements.
6.How does Aetrix verify that LP2983IM5X-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2983IM5X-1.2/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 LP2983IM5X-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LP2983IM5X-1.2/NOPB?
All LP2983IM5X-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2983IM5X-1.2/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 LP2983IM5X-1.2/NOPB part is unused and in its original packaging.
Return procedure for LP2983IM5X-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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