LM9074MX/NOPB

Voltage Dropout (Max):	2.5V @ 180mA
Base Part Number:	LM9074
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Reverse Polarity, Short Circuit
Control Features:	Enable
PSRR:	60dB (120Hz)
Current - Output:	180mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	16.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The LM9074MX/NOPB is a linear voltage regulator, designed for use in applications powered by USB for battery-oriented applications. It is designed to be used in applications that require a low noise, low distortion and low power consumption. The power supply system on VBUS supplies regulated 5 VDC to the MCU and peripheral devices, while the I/O supply system provides regulated 3.3 VDC to all output terminals. LM9074MX/NOPB can provide excellent accuracy and output stability.

Applications

The main application field of LM9074MX/NOPB is in providing power supply and voltage regulation for devices that use USB, such as digital cameras, mobile phone, GPS receivers and MP3 players. LM9074MX/NOPB supports true 10-bit ADC resolution for precise measurement of battery charging current and comprehensive protection circuitry for overcurrent and overvoltage protection to improve system stability in the battery-powered environment. Furthermore, LM9074MX/NOPB has remarkable voltage accuracy and temperature characteristics, making it a great choice for applications that need to get precise output voltage and stable operation over temperature.

Features

The key features of LM9074MX/NOPB are as follows:

• Input Range: 2.7 V to 5.5 VDC
• Output Voltage: 3.3 VDC ± 2 % with 3 mV line regulation
• Max Output Current: 300 mA (5 V input)
• Temperature Range: -40℃ to +85℃
• Output Noise: 15 μV maximum
• Enable/Disable: CMOS logic controlled
• Low Quiescent Current: 2 mA maximum
• Stable Output Voltage
• Voltage Range: 1.7 V to 14 V

Working Principle

The LM9074MX/NOPB is a linear regulator with a low-dropout (LDO) voltage regulator. The output voltage is determined by the voltage regulator that is controlled by a feedback loop. The feedback loop adjusts the output voltage according to the difference between the actual output voltage and the set output voltage. The LDO regulator uses a pass element to drop the voltage between the input and output voltage. The pass element is usually a field-effect transistor (FET) which operates in linear mode, so that the output voltage is relatively stable at all loads.When the input voltage exceeds the output voltage, the feed-back loop’s error amplifier gets its signal from the voltage divider. The voltage divider provides a fraction of the output voltage to the error amplifier allowing it to adjust the pass element for the desired output voltage. When the input voltage is lower than the output voltage is the power supply dropout voltage, the LDO voltage regulator enters shut down mode.

Conclusion

The LM9074MX/NOPB is a linear voltage regulator, designed mainly for use in applications powered by USB for battery-oriented applications. It has excellent accuracy and output stability, supports true 10-bit ADC resolution and also provides comprehensive protection circuitry for overcurrent and overvoltage protection. With its features and benefits, LM9074MX/NOPB is perfect for applications needing precise output voltage and stable operation over temperature.

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