My Inquiry
My Account
Texas Instruments LP5951MGX-2.5/NOPB
- Part No.:
- LP5951MGX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LP5951MGX-2.5/NOPB.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,080
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP5951MGX-2.5/NOPB from Texas Instruments is a micropower, 150-mA low-dropout CMOS voltage regulator in SC70-5 package, delivering fixed 2.5 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-2.5/NOPB datasheet, LP5951MGX-2.5/NOPB pinout, LP5951MGX-2.5/NOPB application, or LP5951MGX-2.5/NOPB equivalent, key selection considerations include shutdown-enabled power sequencing, 1-µF ceramic capacitor stability, thermal protection behavior at 160°C, and compatibility with 1.8–5.5 V input rails in space-constrained designs.
Technical Context
The LP5951MGX-2.5/NOPB uses a PMOS pass device architecture enabling ultra-low quiescent current (29 µA typ.) and near-zero shutdown current (<1 nA), with internal bias generator and over-current/thermal protection logic. Its enable control features active-high logic with 0.4 V low-threshold and 0.9 V high-threshold across –40°C to 125°C.
Stability is achieved with 1-µF ceramic output capacitors (X7R/X5R, ESR 3–300 mΩ); no external compensation is required. The device exhibits fast turnon (30 µs typ.) and controlled turnoff via internal discharge FET, supporting rapid power-state transitions in digital subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% at 1 mA, ±3.5% over –30°C to +125°C - ensures precision rail for ADC references or core logic. |
| Max Output Current | 150 mA - supports moderate-power microcontrollers, sensors, and RF front-end biasing without derating at 25°C. |
| Dropout Voltage | 250 mV at 150 mA (VOUT ≥2.5 V) - enables operation down to VIN = 2.75 V while maintaining regulation. |
| Quiescent Current | 29 µA typical at no load - extends battery life in always-on monitoring circuits. |
| PSRR | –60 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Line Transient Response | ±2 mV peak deviation - maintains signal integrity during rapid input voltage steps (e.g., battery sag recovery). |
| Enable Thresholds | VIL = 0.4 V, VIH = 0.9 V - compatible with 1.8 V logic I/O without level-shifting. |
| Thermal Shutdown | Triggers at TJ = 160°C (typ.), hysteresis = 20°C - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
LP5951MGX-2.5/NOPB is housed in SC70-5 (DCK) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, optimized for ultra-compact portable PCB layouts.
| 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 | Power ground reference | Common return path for IN, OUT, and EN; requires low-impedance connection to PCB ground plane. |
| 3 - EN | Active-high enable control | Logic high ≥0.9 V enables regulation; logic low ≤0.4 V disables output and reduces IQ to <1 nA. |
| 4 - NC | No internal connection | Not bonded; must remain unconnected - floating or tied to GND/IN has no functional effect. |
| 5 - OUT | Regulated output | Delivers 2.5 V ±2%; requires 1 µF ceramic capacitor (X7R recommended) placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 29 µA typical enables >1-year battery life in coin-cell–powered IoT sensors. |
| 1-µF ceramic capacitor stability | Eliminates need for large tantalum or electrolytic capacitors - saves board area and cost in wearables. |
| Fast 30 µs turnon time | Supports burst-mode operation in duty-cycled microcontrollers without output overshoot. |
| Integrated thermal & short-circuit protection | Auto-recovers after cooling - avoids system-level fault latching in harsh environments. |
| No-load regulation | Maintains 2.5 V output even with zero load - critical for CMOS RAM keep-alive and real-time clock backup rails. |
| Reverse current blocking limitation | Parasitic body diode allows ≤50 mA reverse current; external Schottky required if VOUT > VIN in hot-swap scenarios. |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Provides clean, low-noise 2.5 V analog supply for precision ADC and op-amps; enables deep-sleep mode via EN pin control. Use Value: 29 µA IQ extends battery life beyond 18 months; ±2 mV line transient response prevents baseline drift during RF transmit bursts. | Use Scenario: Wireless temperature/humidity node operating in factory automation with wide ambient temperature swing (–40°C to +85°C). IC Role / Device Role / Timing Role: Supplies regulated 2.5 V to MCU and digital sensor interface; thermal shutdown protects against enclosure overheating. Use Value: Guaranteed 150 mA output at 125°C junction temp supports full-speed sensor sampling; ±3.5% output tolerance ensures ADC accuracy across full industrial range. |
| Smart Home Hub Audio Codec | Portable Medical Diagnostic Device |
Use Scenario: Low-power audio codec in voice-controlled smart speaker requiring low-noise analog supply independent of noisy SMPS rails. IC Role / Device Role / Timing Role: Filters ripple from upstream buck converter; PSRR of –60 dB at 1 kHz attenuates switching artifacts before audio DAC. Use Value: 125 µVRMS output noise preserves SNR in 24-bit audio path; 1-µF ceramic stability simplifies layout near sensitive analog circuitry. | Use Scenario: Handheld ultrasound probe with pulsed high-voltage transmitter and low-noise receiver chain. IC Role / Device Role / Timing Role: Powers FPGA configuration memory and analog front-end bias rails; fast 30 µs turnon synchronizes with pulse trigger timing. Use Value: Fast transient response (–50/+40 mV load step) prevents signal clipping during echo reception; SC70-5 footprint fits tight probe housing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F12-5DBVR | Fixed 1.2 V output; 250 mA rating; 15 µA IQ; requires 0.47 µF min COUT. | Lower output voltage limits use in 1.2 V core rails only; higher current supports more complex SoCs. | Select when 1.2 V rail and sub-20 µA IQ are mandatory; not interchangeable for 2.5 V systems. |
| MCP1700T-2502E/MB | 2.5 V fixed; SOT-23-3 package; 1.6 µA IQ; 250 mV dropout at 250 mA; no enable pin. | Lacks EN control - unsuitable for power-gated subsystems; smaller footprint but no shutdown capability. | Choose for ultra-low-power always-on rails where enable functionality is unnecessary and board space is extremely limited. |
Compared with TPL720F12-5DBVR and MCP1700T-2502E/MB, LP5951MGX-2.5/NOPB uniquely balances 2.5 V precision, active enable control, 150 mA capability, and SC70-5 miniaturization - making it optimal for portable systems needing sequenced, low-noise, battery-optimized regulation.
Availability
LP5951MGX-2.5/NOPB is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, smart home audio codecs, and portable medical diagnostic devices requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LP5951MGX-2.5/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.
The LP5951 product line delivers micropower, low-noise LDOs for battery-operated portable systems - designed specifically for applications demanding ultra-low IQ, small-footprint packaging, and robust transient performance with minimal external components.
FAQ
What is the minimum input voltage required for LP5951MGX-2.5/NOPB to regulate at 2.5 V?
The LP5951MGX-2.5/NOPB requires VIN ≥ VOUT + VDO = 2.5 V + 0.25 V = 2.75 V under 150 mA load. At lighter loads, regulation begins at VIN ≥ 1.8 V, but output remains unregulated until the dropout condition is met. This ensures reliable startup from partially discharged batteries in portable systems.
Does LP5951MGX-2.5/NOPB require an external pull-up on the EN pin for normal operation?
No - LP5951MGX-2.5/NOPB does not require an external pull-up on EN. When enable functionality is unused, TI recommends tying EN directly to VIN to ensure permanent activation. Leaving EN floating is prohibited per datasheet; internal leakage is insufficient to guarantee logic-high state.
Can LP5951MGX-2.5/NOPB safely drive a 150 mA load continuously at 85°C ambient temperature?
Yes - LP5951MGX-2.5/NOPB sustains 150 mA at TA = 85°C when VIN – VOUT ≤ 1.5 V (e.g., VIN = 4.0 V), based on thermal derating curves in the datasheet. With RθJA = 276.7°C/W (SC70), power dissipation must stay below ~145 mW to maintain TJ ≤ 125°C. Layout with thermal vias improves margin.
What ceramic capacitor dielectric type is recommended for LP5951MGX-2.5/NOPB's output?
X7R is recommended for LP5951MGX-2.5/NOPB's 1 µF output capacitor due to its ±15% capacitance stability over –55°C to +125°C. X5R is acceptable for 0°C–70°C applications, but Z5U/Y5V are discouraged - their >50% capacitance loss above 25°C risks instability under temperature variation.
Is reverse current flow possible from OUT to IN on LP5951MGX-2.5/NOPB, and how is it managed?
Yes - LP5951MGX-2.5/NOPB's PMOS pass device includes a parasitic body diode allowing reverse current if VOUT > VIN. Current is limited to ≤50 mA; exceeding this requires an external Schottky diode (cathode to VIN, anode to VOUT) to prevent damage or unintended power backfeed in hot-swap or multi-rail systems.
LP5951MGX-2.5/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):
- 2.5V
- 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-2.5/NOPB FAQ
1.How can I place an order for LP5951MGX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5951MGX-2.5/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-2.5/NOPB reliable?
The price and inventory of LP5951MGX-2.5/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-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP5951MGX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5951MGX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5951MGX-2.5/NOPB?
LP5951MGX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5951MGX-2.5/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-2.5/NOPB?
For technical support, including LP5951MGX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5951MGX-2.5/NOPB requirements.
6.How does Aetrix verify that LP5951MGX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5951MGX-2.5/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-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP5951MGX-2.5/NOPB?
All LP5951MGX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5951MGX-2.5/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-2.5/NOPB part is unused and in its original packaging.
Return procedure for LP5951MGX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5951MGX-2.5/NOPB Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
