The LP2950-N and LP2951-N are micropower voltage regulators with very low quiescent current (75 µA typical) and very low dropout voltage (typically 40 mV at light loads and 380 mV at 100 mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the device increases only slightly in dropout, prolonging battery life.
Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (0.5% typical), extremely good load and line regulation (0.05% typical), and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.
One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5-V, 3-V, or 3.3-V output (depending on the version), or programmed from 1.24 V to 29 V with an external pair of resistors.
The LP2950-N is available in the surface-mount TO-252 package and the popular 3-pin TO-92 package for pin compatibility with older 5-V regulators. The 8-pin LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.
Texas Instruments LP2950CZ-5.0/LFT1's Features
- Input Voltage Range: 2.3 V to 30 V
- 5-V, 3-V, and 3.3-V Output Voltage Versions Available
- High Accuracy Output Voltage
- Ensured 100-mA Output Current
- Extremely Low Quiescent Current
- Low Dropout Voltage
- Extremely Tight Load and Line Regulation
- Very Low-Temperature Coefficient
- Use as Regulator or Reference
- Needs Minimum Capacitance for Stability
- Current and Thermal Limiting
- Stable With Low-ESR Output Capacitors (10 mΩ to 6 Ω)
LP2951-N Versions Only:
- Error Flag Warns of Output Dropout
- Logic-Controlled Electronic Shutdown
- Output Programmable From 1.24 V to 29 V
Texas Instruments LP2950CZ-5.0/LFT1's Applications
- High-Efficiency Linear Regulator
- Regulator with Undervoltage Shutdown
- Low Dropout Battery-powered Regulator
- Snap-ON/Snap-OFF Regulator
Texas Instruments LP2950CZ-5.0/LFT1's Attributes
Type |
Description |
Category |
Integrated Circuits (ICs)
Power Management (PMIC)
Voltage Regulators - Linear
Low Drop Out (LDO) Regulators |
Mfr |
Texas Instruments |
Packaging |
Tape & Reel (TR)
Cut Tape (CT) |
Part Status |
Active |
Output Configuration |
Positive |
Output Type |
Fixed |
Number of Regulators |
1 |
Voltage - Input (Max) |
30V |
Voltage - Output (Min/Fixed) |
5V |
Voltage Dropout (Max) |
0.6V @ 100mA |
Current - Output |
100mA |
Current - Quiescent (Iq) |
120 µA |
Current - Supply (Max) |
14 mA |
Protection Features |
Over Current, Over Temperature, Short Circuit |
Operating Temperature |
-40°C ~ 125°C (TJ) |
Mounting Type |
Through Hole |
Package / Case |
TO-226-3, TO-92-3 (TO-226AA) |
Supplier Device Package |
TO-92-3 |
Base Product Number |
LP2950 |
Texas Instruments LP2950CZ-5.0/LFT1's Category-Low Drop Out(LDO) Regulators
LDO stands for Low Dropout Regulator, which is a low-power low-dropout linear voltage regulator. It automatically adjusts the voltage occupied by the transistor or field-effect transistor in the linear region through internal negative feedback to obtain a stable output voltage drop from the input voltage.
Under the condition of changes in input voltage or load current, LDO can still maintain a stable output voltage; it has extremely low inherent noise and a high power supply rejection ratio (PSRR). More details: Introduction and Common Types of Linear Low Dropout Voltage Regulator Chips.
Manufacturer of LP2950CZ-5.0/LFT1 - Texas Instruments
TI is an international semiconductor company in the United States, headquartered in Dallas, Texas. The company was established in 1930 and has more than 100 offices worldwide, with more than 43,000 employees in the United States, Europe, Asia, and Latin America. TI is a global leading semiconductor manufacturer and has an important influence on multiple fields such as computers, communications, industrial control, and healthcare.
The history of Texas Instruments can be traced back to 1930 when inventor and engineer James Korklewski established Geophysical Service Incorporation to create a sales company for electronic equipment. In 1941, TI was restructured into an independent company and began to engage in scientific and technological research and development and semiconductor production. TI first introduced transistors in the 1950s. In the 1960s, the company began to engage in the integrated circuit industry and produced the world's first single-chip microcomputer in 1971, which greatly changed the development model of the computer industry.
Texas Instruments products include analog integrated circuits, digital signal processors, single-chip microcontrollers, power management devices, chip solutions, and radio frequency controllers. These electrical components are sold to the aerospace, defense, industrial, personal electronics, and communications markets. They cover portable audio devices, high-definition televisions, car navigation, mobile phones, automotive signal processing, industrial control equipment, and security protection.
Texas Instruments' globalization strategy relies on an understanding of cross-cultural, language, and technology. In the past few decades, TI has expanded its business globally. It is very popular in the Asian market. The company has opened offices and factories in China, Southeast Asia, and India, aiming to expand its market share and improve competitiveness. More detail: Analog Semiconductor Leader – TI (Texas Instruments)
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