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Texas Instruments LP5951MGX-3.0/NOPB
- Part No.:
- LP5951MGX-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LP5951MGX-3.0/NOPB.pdf
- Description:
- IC REG LINEAR 3V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,158
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Product details
Overview
LP5951MGX-3.0/NOPB from Texas Instruments is a micropower, 150-mA low-dropout CMOS voltage regulator in SC70-5 package, delivering fixed 3.0 V output with 250 mV dropout at 150 mA, 29 µA quiescent current, and ±2 mV line transient response - deployed in battery-powered portable electronics requiring stable low-noise supply under dynamic load.
For engineers reviewing the LP5951MGX-3.0/NOPB datasheet, LP5951MGX-3.0/NOPB pinout, LP5951MGX-3.0/NOPB application, or LP5951MGX-3.0/NOPB equivalent, key selection considerations include its 1.8–5.5 V input range, active-high enable control, thermal/short-circuit protection, and compatibility with 1-µF ceramic output capacitors for space-constrained designs.
Technical Context
The LP5951MGX-3.0/NOPB integrates a PMOS pass device with internal bias generator, overcurrent and thermal shutdown logic, and precision reference circuitry. Its architecture enables fast 30 µs turn-on time and supports no-load stability - critical for RAM keep-alive and ultra-low-power sleep modes.
It operates across –40°C to 125°C junction temperature, uses an active-high EN pin with 0.9 V VIH threshold, and features reverse-current protection via inherent body diode with 50 mA forward limit - requiring external Schottky diode only if output-to-input reverse bias exceeds that limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±3.5% over –40°C to +125°C - ensures stable core/sensor rail without external feedback network. |
| Max Output Current | 150 mA continuous - sufficient for microcontrollers, RF transceivers, and analog sensors in portable systems. |
| Dropout Voltage | 250 mV at 150 mA (VOUT ≥2.5 V) - enables operation down to VIN = 3.25 V while maintaining regulation. |
| Quiescent Current | 29 µA typical at no load - extends battery life in always-on monitoring applications. |
| PSRR | –60 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Enable Threshold | VIH = 0.9 V, VIL = 0.4 V - compatible with 1.8 V and 3.3 V logic families without level-shifting. |
| Shutdown Current | <1 nA typical - eliminates standby leakage in power-gated subsystems. |
Pinout & Package
LP5951MGX-3.0/NOPB is housed in a 2.00 mm × 1.25 mm SC70-5 surface-mount package with 0.65 mm pitch, optimized for high-density PCB layouts in handheld and wearable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.8–5.5 V; must be decoupled with ≥1 µF ceramic capacitor within 1 cm for stability. |
| 2 (GND) | Ground reference | Primary return path for IN, OUT, and EN; requires low-impedance connection to clean analog ground plane. |
| 3 (EN) | Enable control input | Active-high logic input; tie to VIN for permanent enable or drive with MCU GPIO for dynamic power sequencing. |
| 4 (NC) | No internal connection | Unbonded pad - must remain unconnected and not routed to avoid parasitic coupling or mechanical stress. |
| 5 (OUT) | Regulated output | Delivers 3.0 V ±3.5%; requires ≥1 µF ceramic capacitor (X7R/X5R) with ESR 3–300 mΩ for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No-load stability | Maintains regulation with zero output current - enables use in CMOS RAM backup and real-time clock circuits. |
| Fast turn-on time | 30 µs typical - reduces wake-up latency in duty-cycled sensor nodes and IoT endpoints. |
| Low-noise output | 125 µVRMS (10 Hz–100 kHz) - avoids interference in precision ADCs and audio signal chains. |
| Thermal shutdown | Activates at 160°C (typ.), hysteresis 20°C - prevents permanent damage during sustained overload or poor heatsinking. |
| Short-circuit protection | Limits output current to ~150–400 mA - sustains safe operation during accidental output shorts without latch-up. |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Provides clean, low-noise 3.0 V supply to analog front-end and ultra-low-power MCU. Use Value: 29 µA quiescent current extends battery life beyond 12 months; ±2 mV line transient response rejects noise from Bluetooth radio bursts. |
Use Scenario: Wireless temperature/humidity node operating in factory environment with wide ambient swings. IC Role / Device Role / Timing Role: Regulates 3.0 V rail for digital sensor interface and sub-GHz transceiver under varying input (2.5–5.0 V). Use Value: –40°C to 125°C operation ensures reliability across industrial temperature range; 150 mA output supports burst transmission. |
| Portable Medical Diagnostic Tool | Smart Home Hub Controller |
|
Use Scenario: Handheld ultrasound probe with integrated FPGA and analog beamformer. IC Role / Device Role / Timing Role: Supplies 3.0 V to low-noise analog signal chain and FPGA I/O banks. Use Value: 125 µVRMS output noise prevents degradation of weak echo signals; 1-µF ceramic compatibility saves board area. |
Use Scenario: Always-on voice assistant hub with Zigbee/Z-Wave radios and local processing. IC Role / Device Role / Timing Role: Powers 3.0 V logic rails for multi-radio SoC during deep-sleep and active communication phases. Use Value: <1 nA shutdown current eliminates leakage in multi-week standby; active-high EN simplifies GPIO-controlled power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGEDR | 7-channel high-side driver with integrated 3.3 V LDO; 100 mA per channel; no enable pin; larger 16-pin HTSSOP package. | Designed for LED/display driver integration, not standalone regulation; lacks independent enable and low-noise optimization. | Select only when consolidating driver + LDO functions; not suitable for noise-sensitive analog rails. |
| TPS7A0530PDBVR | 300 mA output, 25 µA IQ, 170 mV dropout at 300 mA, SOT-23-5 package; no NC pin; higher current but larger thermal footprint. | Better for higher-load applications (e.g., dual-core MCUs); less optimal for ultra-low-IQ battery longevity vs. LP5951MGX-3.0/NOPB. | Prefer when >150 mA is required and board space allows SOT-23-5; verify thermal derating at 85°C ambient. |
Compared with TPL7407LPGEDR and TPS7A0530PDBVR, LP5951MGX-3.0/NOPB offers superior no-load stability, lower noise, and smaller SC70-5 footprint - making it the optimal choice for compact, battery-limited, analog-critical systems where 150 mA suffices.
Availability
LP5951MGX-3.0/NOPB is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, portable medical diagnostic tools, and smart home hub controllers requiring stable component supply with guaranteed long-term sourcing.
Supply support for LP5951MGX-3.0/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, specializing in analog and embedded processing technologies with broad industrial, automotive, and personal electronics reach.
LP5951MGX-3.0/NOPB belongs to TI's LP59xx family of micropower LDOs engineered specifically for portable, battery-operated systems demanding ultra-low quiescent current, small footprint, and robust transient performance.
FAQ
What is the maximum input voltage rating for LP5951MGX-3.0/NOPB?
The absolute maximum input voltage (IN to GND) for LP5951MGX-3.0/NOPB is 6.5 V. However, the recommended operating range is 1.8 V to 5.5 V. Exceeding 5.5 V may trigger internal protection or degrade reliability - always maintain VIN ≤5.5 V in normal operation. The LP5951MGX-3.0/NOPB datasheet specifies this limit under Absolute Maximum Ratings section 6.1.
Does LP5951MGX-3.0/NOPB require an external pull-up on the EN pin?
No - LP5951MGX-3.0/NOPB does not require an external pull-up on the EN pin. When unused, EN should be tied directly to VIN to ensure permanent enable. Leaving EN floating is prohibited per datasheet Pin Functions table, as it may cause erratic enable/disable behavior. The LP5951MGX-3.0/NOPB has no internal pull-up; external connection is mandatory for deterministic operation.
Can LP5951MGX-3.0/NOPB operate with a 0.47 µF output capacitor?
No - LP5951MGX-3.0/NOPB requires a minimum output capacitance of 0.7 µF (per section 6.8), and 1 µF is the recommended value for guaranteed stability across temperature and bias. A 0.47 µF capacitor falls below the minimum and risks oscillation or poor transient response. The LP5951MGX-3.0/NOPB datasheet explicitly states 0.7 µF as the design-minimum, including all tolerances and DC bias effects.
What is the thermal shutdown behavior of LP5951MGX-3.0/NOPB?
LP5951MGX-3.0/NOPB activates thermal shutdown at approximately 160°C junction temperature (typ.) and re-enables after cooling to ~140°C due to 20°C hysteresis. During sustained overload, this results in pulsed output rather than latch-off. The LP5951MGX-3.0/NOPB remains functional after recovery, provided ambient conditions allow heat dissipation - no manual reset is needed.
Is LP5951MGX-3.0/NOPB compatible with X5R ceramic capacitors?
Yes - LP5951MGX-3.0/NOPB is fully compatible with X5R ceramic capacitors for both input and output, as confirmed in section 8.2.2.4 and Table 2 of the datasheet. X5R offers adequate temperature stability (±15% from –55°C to +85°C) and low ESR, meeting the 3–300 mΩ requirement. For wider temperature operation (–40°C to +125°C), X7R is preferred, but X5R is acceptable in most commercial applications.
LP5951MGX-3.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- 70 µA
- PSRR:
- 60dB ~ 50dB (100Hz ~ 10kHz)
- 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:
- SC-70-5
LP5951MGX-3.0/NOPB FAQ
1.How can I place an order for LP5951MGX-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5951MGX-3.0/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 LP5951MGX-3.0/NOPB reliable?
The price and inventory of LP5951MGX-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5951MGX-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LP5951MGX-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5951MGX-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5951MGX-3.0/NOPB?
LP5951MGX-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5951MGX-3.0/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 LP5951MGX-3.0/NOPB?
For technical support, including LP5951MGX-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5951MGX-3.0/NOPB requirements.
6.How does Aetrix verify that LP5951MGX-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5951MGX-3.0/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 LP5951MGX-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LP5951MGX-3.0/NOPB?
All LP5951MGX-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5951MGX-3.0/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 LP5951MGX-3.0/NOPB part is unused and in its original packaging.
Return procedure for LP5951MGX-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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