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Texas Instruments LP5951MGX-1.3/NOPB
- Part No.:
- LP5951MGX-1.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LP5951MGX-1.3/NOPB.pdf
- Description:
- IC REG LINEAR 1.3V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP5951MGX-1.3/NOPB from Texas Instruments is a micropower, 150-mA low-dropout CMOS voltage regulator in SC70-5 package, delivering fixed 1.3 V output with 29 µA typical quiescent current, 200 mV dropout at 150 mA (for VOUT < 2.5 V), and ±2 mV line transient response - deployed in battery-powered microcontroller core rails and sensor biasing.
For engineers reviewing the LP5951MGX-1.3/NOPB datasheet, LP5951MGX-1.3/NOPB pinout, LP5951MGX-1.3/NOPB application, or LP5951MGX-1.3/NOPB equivalent, key selection criteria include shutdown current (<1 nA), PSRR (–60 dB @ 1 kHz), thermal protection (160°C trip), enable logic thresholds (0.4 V/0.9 V), and stability with 1-µF ceramic output capacitors.
Technical Context
The LP5951MGX-1.3/NOPB integrates a PMOS pass device with internal reference, bias generator, and overcurrent/thermal protection circuitry. Its architecture enables fast turnon (30 µs typ.) and controlled turnoff via internal FET discharge of the output capacitor.
It operates across –40°C to 125°C junction temperature, supports input voltages from 1.8 V to 5.5 V, and maintains regulation down to 1.3 V output with no-load stability - critical for CMOS RAM keep-alive and ultra-low-power wake-up circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.3 V ±3.5% over –30°C to +125°C - ensures stable core supply for low-voltage MCUs and RF transceivers. |
| Max Output Current | 150 mA continuous - sufficient for single-core ARM Cortex-M0+ or BLE SoC subsystems. |
| Dropout Voltage | 200 mV at 150 mA (VOUT < 2.5 V) - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (2.4 V min) with margin. |
| Quiescent Current | 29 µA typical at no load - extends battery life in always-on sensor nodes beyond 5 years on CR2032. |
| PSRR | –60 dB at 1 kHz - suppresses switching noise from adjacent DC/DC converters feeding mixed-signal ICs. |
| Enable Thresholds | VIL = 0.4 V (shutdown), VIH = 0.9 V (enable) - compatible with 1.8 V GPIO without level-shifting. |
| Shutdown Current | <1 nA typical - eliminates standby drain in tamper-detect or security-critical power domains. |
Pinout & Package
LP5951MGX-1.3/NOPB is housed in a 2.00 mm × 1.25 mm SC70-5 package with 0.65 mm pitch, optimized for space-constrained wearables and hearing aids.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 1.8 V–5.5 V; must be ≥1.3 V + VDO (200 mV) for regulation; requires local 1-µF ceramic decoupling ≤1 cm away. |
| 2 - GND | Power ground reference | Low-impedance return path for IN, OUT, and EN; must connect directly to clean analog ground plane to minimize noise coupling. |
| 3 - EN | Logic-enable control input | Active-high; drives regulator ON/OFF; must not float - tie to VIN if always-on; threshold validated from –40°C to 125°C. |
| 4 - NC | No internal connection | Unbonded pad; electrically isolated - must remain unconnected and may be left floating or tied to GND for mechanical stability. |
| 5 - OUT | Regulated output voltage | Delivers 1.3 V ±3.5%; requires 1-µF ceramic capacitor (X7R/X5R) within 1 cm; ESR 3–300 mΩ ensures stability. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with 1-µF ceramic output capacitor | Eliminates need for large tantalum or electrolytic caps - reduces BOM count and PCB area by >40% vs legacy LDOs. |
| Fast 30-µs turnon time | Enables dynamic power gating in duty-cycled IoT sensors - minimizes wake-up latency without external sequencing. |
| Thermal shutdown with 20°C hysteresis | Auto-recovers after cooling from 160°C trip point - prevents latch-up during short-term overload or poor heatsinking. |
| No-load regulation stability | Maintains 1.3 V output with zero load - essential for memory backup rails and real-time clock (RTC) power domains. |
| Reverse current protection limit | Withstands 50 mA reverse current from VOUT to VIN - avoids external Schottky diode in most single-supply systems. |
Applications
| Wearable Health Sensor Node | BLE SoC Power Rail |
|---|---|
|
Use Scenario: Continuous ECG monitoring using ultra-low-power analog front-end and BLE radio. IC Role / Device Role / Timing Role: Provides clean, stable 1.3 V supply to ADC reference and BLE SoC core logic. Use Value: 29 µA quiescent current extends coin-cell lifetime beyond 3 years; 1-µF capacitor compatibility shrinks footprint by 30% vs SOT-23 alternatives. |
Use Scenario: Bluetooth Low Energy peripheral (e.g., smart tag) powered by CR2032 battery. IC Role / Device Role / Timing Role: Regulates 1.3 V for BLE SoC digital core and RF transceiver during active transmit/receive bursts. Use Value: ±2 mV line transient response prevents digital glitches during RF switching; 150 mA capability supports peak TX current. |
| Industrial Temperature Transmitter | Smart Hearing Aid ASIC Bias |
|
Use Scenario: Loop-powered 4–20 mA transmitter with onboard microcontroller and precision sensor interface. IC Role / Device Role / Timing Role: Supplies 1.3 V to low-noise op-amps and sigma-delta ADC in harsh industrial environments. Use Value: –60 dB PSRR at 1 kHz rejects noise from 4–20 mA loop drivers; –40°C to 125°C rating ensures reliability in field enclosures. |
Use Scenario: Miniature in-ear hearing aid requiring sub-2 mm board height and multi-year battery life. IC Role / Device Role / Timing Role: Powers DSP and audio codec ASIC from single 1.2 V NiMH cell via boost + LDO cascade. Use Value: SC70-5 package (2.0 × 1.25 mm) fits tight acoustic cavities; <1 nA shutdown current preserves charge during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGQDQ1 | 7-channel high-side driver with integrated 1.3 V LDO; higher IQ (50 µA); no enable pin; 100 mA per channel. | Designed for automotive LED matrix control - not a standalone regulator; lacks shutdown mode and transient performance specs. | Only suitable when driving discrete loads alongside regulated bias; not drop-in for pure voltage regulation use cases. |
| TPS7A0513PDBVR | 150 mA, 1.3 V fixed-output LDO in SOT-23-5; 25 µA IQ; 170 mV dropout; –40°C to 125°C; requires 2.2 µF min COUT. | Optimized for cost-sensitive consumer electronics; lower dropout but larger minimum output capacitance increases board area. | Preferred where lowest possible dropout is critical and 2.2 µF ceramic cap fits layout; otherwise LP5951MGX-1.3/NOPB offers superior transient response and smaller cap requirement. |
Compared with TPL7407LPGQDQ1 and TPS7A0513PDBVR, LP5951MGX-1.3/NOPB uniquely combines 1-µF stability, <1 nA shutdown, and ±2 mV line transient response in SC70-5 - making it optimal for space- and power-constrained portable medical and audio devices where minimal external components and ultra-low standby drain are mandatory.
Availability
LP5951MGX-1.3/NOPB is available at Aetrix Electronics and suitable for wearable health monitors, BLE peripherals, industrial transmitters, and smart hearing aids requiring stable component supply with guaranteed long-term sourcing.
Supply support for LP5951MGX-1.3/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 expertise in power management ICs for mission-critical applications.
The LP5951MGX-1.3/NOPB belongs to TI's micropower LDO family engineered specifically for battery-powered portable electronics - emphasizing ultra-low IQ, small-footprint packaging, and robust transient performance in harsh thermal environments.
FAQ
What is the maximum input voltage rating for LP5951MGX-1.3/NOPB?
The absolute maximum input voltage (IN to GND) for LP5951MGX-1.3/NOPB is 6.5 V. However, the recommended operating range is 1.8 V to 5.5 V. Exceeding 5.5 V risks permanent damage even briefly, and operation above 5.5 V voids functional guarantees per the datasheet's Absolute Maximum Ratings table.
Does LP5951MGX-1.3/NOPB require an external pull-up resistor on the EN pin?
No - LP5951MGX-1.3/NOPB does not require an external pull-up on EN. The EN pin has no internal pull-up; if enable functionality is unused, TI explicitly recommends tying EN directly to VIN to ensure reliable turn-on. Leaving EN floating is prohibited and may cause erratic regulation or oscillation.
Can LP5951MGX-1.3/NOPB operate with a 0.47 µF output capacitor?
No - LP5951MGX-1.3/NOPB requires a minimum output capacitance of 0.7 µF (ensured design limit) per datasheet Section 6.8. A 0.47 µF capacitor falls below this threshold and risks instability, excessive output ripple, or failure to regulate under load transients. Use ≥1 µF X7R ceramic for guaranteed performance.
Is LP5951MGX-1.3/NOPB RoHS-compliant and lead-free?
Yes - LP5951MGX-1.3/NOPB carries the /NOPB suffix, which TI designates as "No Lead (Pb)-Free" and RoHS-compliant per J-STD-609. It meets EU RoHS Directive 2011/65/EU and is compatible with standard Pb-free reflow profiles up to 260°C peak (10–20 s).
What thermal derating applies to LP5951MGX-1.3/NOPB in SC70-5 package at 85°C ambient?
At TA = 85°C, the maximum allowable power dissipation for LP5951MGX-1.3/NOPB in SC70-5 is calculated as PD = (TJ-MAX – TA) / RθJA = (125°C – 85°C) / 276.7°C/W ≈ 144 mW. For a 1.3 V output, this limits usable input-to-output differential to ~0.96 V at 150 mA - confirming need for careful thermal design in enclosed environments.
LP5951MGX-1.3/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):
- 1.3V
- 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-1.3/NOPB FAQ
1.How can I place an order for LP5951MGX-1.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5951MGX-1.3/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-1.3/NOPB reliable?
The price and inventory of LP5951MGX-1.3/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-1.3/NOPB is usually 5 days.
3.What payment methods are accepted for LP5951MGX-1.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5951MGX-1.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5951MGX-1.3/NOPB?
LP5951MGX-1.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5951MGX-1.3/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-1.3/NOPB?
For technical support, including LP5951MGX-1.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5951MGX-1.3/NOPB requirements.
6.How does Aetrix verify that LP5951MGX-1.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5951MGX-1.3/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-1.3/NOPB meets industry standards.
7.What is the process for return or replacement of LP5951MGX-1.3/NOPB?
All LP5951MGX-1.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5951MGX-1.3/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-1.3/NOPB part is unused and in its original packaging.
Return procedure for LP5951MGX-1.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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