NJM78L09UA-TE1

Voltage Dropout (Max):	--
Supplier Device Package:	SOT-89
Package / Case:	TO-243AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	65dB (120Hz)
Current - Quiescent (Iq):	6mA
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	9V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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NJM78L09UA-TE1 Application Field and Working Principle

NJM78L09UA-TE1, classified as PMIC – Voltage Regulators – Linear, is an 8-pin voltage regulator IC with load disconnecting circuit that features low noise, low standby current, and other features of favorable environmental characteristics. It is a single channel, low drop-out regulator that utilizes an advanced BiCMOS process and is able to operate from a battery.

General Description

NJM78L09UA-TE1 is a single-channel low dropout voltage regulator IC that is designed to produce an output voltage range of 1.2V to 17V and is exceptionally low noise in the operating frequency range of 0.2Hz to 400kHz. It is designed to be used in applications requiring an output voltage between 1.2V and 17V and a load current up to 100mA. The device ensures an input voltage range of 1.2V to 18V and offers a low on-chip ESR of 8.2mΩ. The on-chip ESR of 8.2mΩ enables the device to deliver higher ripple rejection and lower EMI performance during switching.The device is built using an advanced BiCMOS process, which features load disconnecting circuit that is highly accurate and stable when transitioning between different operating states or switching from a low- to high-power condition. This helps to reduce output voltage damage if an unexpected load surge or other abnormal condition takes place. The device is rated for operation at temperatures ranging from -40°C to 85°C.

Application Field

NJM78L09UA-TE1 is suitable for a variety of applications, including USB charged applications, PC-related power supplies, light portable electronic applications, and small portable equipment. It can also be used in telecom, battery-powered applications, audio/video equipment, portable multimedia players, digital-signal processors, and similar very low standby power consumption applications.

Working Principle

NJM78L09UA-TE1 works by controlling a constant output voltage. The device compares an internal voltage reference to the feedback voltage and adjusts the control loop such that the output voltage is maintained. During this process, the device also monitors the current flow through the load and disconnects the output voltage if the output current exceeds the operating limits.The device also features built-in thermal protection, which is activated whenever the junction temperature exceeds a predetermined limitation. If a fault is detected during the operation of the device, the internal stoppage circuit stops the output voltage. To prevent over-current or current limiting, NJM78L09UA-TE1 is integrated with current limit circuit and output voltage surpass detection circuit which ensures reliability and safety.The device includes an adjustable current limit and a wide output voltage range. This means that the NJM78L09UA-TE1 can provide a wide variety of output voltages with a preset minimum current limit. The current limit value can be adjusted by connecting a suitable external resistor.In addition, NJM78L09UA-TE1 offers good load and line regulation, and low output voltage ripple. This is achieved by an adaptive-bias compensation network, which enables the device to maintain accurate output voltage in both light and heavy loading conditions. It also has an on-chip led status indicator which is used to understand the operation state of the device.

Conclusion

NJM78L09UA-TE1 is a single channel, low drop-out voltage regulator IC that is rated for operation at temperatures ranging from -40°C to 85°C. This device features advanced BiCMOS process, load disconnecting circuit and on-chip ESR of 8.2mΩ, which makes it perfect for applications requiring an output voltage between 1.2V and 17V and a load current up to 100mA. It is suitable for several applications such as USB charged applications, PC-related power supplies, light portable electronic applications, and small portable equipment. It is further integrated with current limit circuit and output voltage surpass detection circuit which ensures reliability and safety of the device.

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