My Inquiry
My Account
Texas Instruments LP5951MG-2.8
- Part No.:
- LP5951MG-2.8
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LP5951MG-2.8.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,656
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP5951MG-2.8 from Texas Instruments is a micropower, 150-mA low-dropout CMOS voltage regulator in SC70-5 package, delivering a fixed 2.8 V output with 250 mV dropout at 150 mA, 29 µA quiescent current, and ±2 mV line transient response. It serves as a precision power rail for battery-powered microcontrollers, RF transceivers, and sensor signal chains where low noise and fast enable control are critical.
For engineers reviewing the LP5951MG-2.8 datasheet, LP5951MG-2.8 pinout, LP5951MG-2.8 application, or LP5951MG-2.8 equivalent, key selection criteria include its 2.8 V fixed output, SC70-5 footprint compatibility, 30 µs turnon time, shutdown leakage <1 nA, and stability with 1-µF ceramic capacitors - all validated across –40°C to 125°C junction temperature.
Technical Context
The LP5951MG-2.8 integrates a PMOS pass device with internal bias generator and thermal/overcurrent protection. Its architecture enables no-load stability and reverse-current blocking via the inherent body diode, with active discharge during shutdown to prevent output voltage hold-up.
Enable control uses logic-high activation (VIH = 0.9 V) and features fast turnon (30 µs typ.) and turnoff via internal FET discharge. PSRR reaches –60 dB at 1 kHz, and output noise is 125 µVRMS (10 Hz–100 kHz), supporting noise-sensitive analog and RF loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±3.5% over –40°C to +125°C; ensures stable core voltage for 2.8 V I/O domains. |
| Max Output Current | 150 mA continuous; supports single-core MCUs, BLE SoCs, and low-power ADCs without derating at TA ≤85°C. |
| Dropout Voltage | 250 mV at 150 mA (VOUT ≥2.5 V); allows operation down to VIN = 3.05 V, extending battery runtime in 3.3 V Li-ion systems. |
| Quiescent Current | 29 µA typical at no load; enables >1-year battery life in always-on sensor nodes using CR2032 cells. |
| PSRR | –60 dB at 1 kHz; suppresses switching noise from DC/DC converters feeding the LP5951MG-2.8 input rail. |
| Enable Threshold | VIH = 0.9 V, VIL = 0.4 V; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Shutdown Current | <1 nA typical; eliminates standby drain in wake-on-event architectures. |
Pinout & Package
LP5951MG-2.8 is housed in a 2.00 mm × 1.25 mm SC70-5 package with 0.65 mm pitch, optimized for space-constrained portable PCBs. Thermal resistance RθJA = 276.7°C/W enables 125°C operation with minimal copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 1.8 V–5.5 V; requires local 1-µF ceramic capacitor within 1 cm for stability. |
| 2 - GND | Power ground reference | Must connect to clean analog ground plane; shared return path for IN and OUT capacitors. |
| 3 - EN | Logic-enable input | Active-high control: ≥0.9 V enables regulation; ≤0.4 V forces shutdown with <1 nA IQ. |
| 4 - NC | No internal connection | Not bonded; must remain unconnected and unstubbed to avoid parasitic coupling. |
| 5 - OUT | Regulated output | Delivers 2.8 V ±3.5%; requires 1-µF X7R ceramic capacitor with ESR 3–300 mΩ placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| No-load stability | Maintains regulation with zero output current - essential for RAM keep-alive and ultra-low-power sleep modes. |
| Fast enable turnon | 30 µs output ramp time enables rapid wake-from-sleep in sub-100 µs system recovery sequences. |
| Thermal shutdown | Activates at TJ = 160°C (typ.) with 20°C hysteresis, preventing permanent damage during sustained overload or poor heatsinking. |
| Reverse current blocking | Body diode limits reverse current to ≤50 mA; external Schottky required only if VOUT > VIN exceeds this threshold. |
| Small-footprint compatibility | Stable with 1-µF ceramic output capacitors - eliminates need for larger, costlier tantalum or electrolytic types. |
Applications
| Wearable Health Monitor | Industrial Wireless Sensor Node |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery with periodic BLE transmission. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying ADC, op-amps, and BLE radio; enables fast wake/sleep cycling via EN pin. Use Value: 29 µA quiescent current extends battery life beyond 18 months; 125 µVRMS noise prevents baseline drift in analog front-end. | Use Scenario: Battery-operated vibration sensor node transmitting data via LoRaWAN every 5 minutes. IC Role / Device Role / Timing Role: Regulator for microcontroller core and MEMS accelerometer; EN pin synchronized with MCU deep-sleep mode. Use Value: 250 mV dropout allows operation until battery drops to 3.05 V; thermal shutdown protects against enclosure overheating in sealed enclosures. |
| Portable Medical Infusion Pump | Automotive Cabin Camera Module |
Use Scenario: Low-noise power for precision DAC controlling motor current and pressure sensors. IC Role / Device Role / Timing Role: Clean 2.8 V rail for analog signal chain; PSRR of –60 dB at 1 kHz rejects noise from nearby DC/DC converter. Use Value: ±2 mV line transient response prevents DAC output glitches during battery voltage sag during motor startup. | Use Scenario: Compact rear-view camera module powered from 5 V vehicle bus with strict EMC requirements. IC Role / Device Role / Timing Role: Post-regulator for image sensor and ISP; SC70-5 footprint minimizes board area in tight lens housing. Use Value: 2.00 mm × 1.25 mm package fits under lens barrel; 125°C max junction rating supports under-hood ambient conditions. |
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-DBVR | Fixed 1.2 V output; 200 mA rating; 170 mV dropout at 200 mA; 25 µA IQ. | Designed for core voltage of low-voltage logic; not suitable for 2.8 V I/O rails. | Select only when 1.2 V output and higher current are required; not a functional replacement for LP5951MG-2.8. |
| MCP1700T-2802E/TT | Fixed 2.8 V; SOT-23-3 package; 250 mA rating; 600 mV dropout at 250 mA; 1.6 µA IQ. | Lacks enable pin and thermal shutdown; higher dropout reduces usable battery range. | Use where ultra-low IQ dominates design priority and enable/shutdown is unnecessary; requires layout change due to 3-pin vs. 5-pin footprint. |
Compared with TPL720F12-DBVR and MCP1700T-2802E/TT, the LP5951MG-2.8 uniquely balances 2.8 V output accuracy, integrated enable control, thermal protection, and SC70-5 size - making it optimal for compact, battery-critical systems requiring regulated 2.8 V with full safety features.
Availability
LP5951MG-2.8 is available at Aetrix Electronics and suitable for wearable electronics, industrial wireless sensors, portable medical devices, and automotive cabin modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP5951MG-2.8 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 specializing in analog and embedded processing technologies, with leadership in power management ICs for high-reliability applications.
The LP5951 product line delivers micropower, low-noise LDOs for portable and battery-powered systems - engineered for minimal board space, wide input range, and robust protection in harsh thermal environments.
FAQ
What is the maximum input voltage for the LP5951MG-2.8?
The LP5951MG-2.8 supports an absolute maximum input voltage of 6.5 V on the IN pin, but its recommended operating range is 1.8 V to 5.5 V. Operation above 5.5 V risks permanent damage per Absolute Maximum Ratings, and the device does not regulate below 1.8 V input regardless of output voltage setting.
Does the LP5951MG-2.8 require an external pull-up resistor on the EN pin?
No, the LP5951MG-2.8 does not require an external pull-up on the EN pin. When enable functionality is unused, TI recommends tying EN directly to VIN to ensure reliable turn-on. Leaving EN floating is prohibited - it may cause erratic regulation or increased quiescent current due to undefined logic state.
Can the LP5951MG-2.8 be used with a 0402-size 1-µF ceramic capacitor?
Yes, the LP5951MG-2.8 is designed to work with 1-µF ceramic capacitors including 0402 case sizes, provided the capacitor maintains ≥0.7 µF capacitance under DC bias and temperature extremes. Per TI's application notes, X5R/X7R dielectrics are preferred; verify manufacturer datasheets for bias derating curves before final selection.
What happens if the output voltage of the LP5951MG-2.8 is forced above the input voltage?
If VOUT exceeds VIN, the LP5951MG-2.8's internal PMOS body diode becomes forward-biased, allowing reverse current up to 50 mA. Beyond that, external protection (e.g., Schottky from VOUT to VIN) is required to prevent damage. This condition commonly occurs during hot-swap or backup power transitions.
Is the LP5951MG-2.8 RoHS-compliant and halogen-free?
Yes, the LP5951MG-2.8 is RoHS-compliant and halogen-free per Texas Instruments' official packaging and environmental documentation. The SC70-5 package (DCK) uses lead-free matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30°C/85% RH.
LP5951MG-2.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- 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
LP5951MG-2.8 FAQ
1.How can I place an order for LP5951MG-2.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5951MG-2.8 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 LP5951MG-2.8 reliable?
The price and inventory of LP5951MG-2.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5951MG-2.8 is usually 5 days.
3.What payment methods are accepted for LP5951MG-2.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5951MG-2.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5951MG-2.8?
LP5951MG-2.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5951MG-2.8 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 LP5951MG-2.8?
For technical support, including LP5951MG-2.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5951MG-2.8 requirements.
6.How does Aetrix verify that LP5951MG-2.8 is sourced from the original manufacturer or authorized distributors?
All LP5951MG-2.8 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 LP5951MG-2.8 meets industry standards.
7.What is the process for return or replacement of LP5951MG-2.8?
All LP5951MG-2.8 units undergo pre-shipment inspection (PSI). If there is an issue with LP5951MG-2.8, 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 LP5951MG-2.8 part is unused and in its original packaging.
Return procedure for LP5951MG-2.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5951MG-2.8 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.…
