LP3983ITLX-1.6/NOPB

PMIC - Voltage Regulators - Linear

The LP3983ITLX-1.6/NOPB is a low-dropout (LDO) linear voltage regulator designed for Ultra Low Output Voltage. The device features an operating temperature range of -40°C to +125°C and operates at current up to 1.6A. It is available in the TO-263 5-Lead package and delivered as either a fixed output voltage or an adjustable voltage. The output voltage may be adjustable between 0.8V and 6.0V. It is ideal for applications where ultra low current operation is necessary such as low-power supply and battery-powered systems.

The LP3983ITLX-1.6/NOPB combines superior stability, low noise and low quiescent current into a compact package. It features a low dropout voltage, making it ideal for low input/ high output systems. Low quiescent current also helps to reduce system power consumption and battery life. The device can provide output voltage stability under conditions of heavy loading, eliminating the need for external compensation.

Application Field

The LP3983ITLX-1.6/NOPB is ideally suited for Ultra Low Output Voltage applications, where space is at a premium. It is ideal for smartphones, tablets, portable media players, MP3 players, charge pumps, automotive systems, powering FETs, medical devices, and battery-powered systems. The LP3983ITLX-1.6/NOPB is also suitable for multiple output supplies, such as 5V and 3V, 3.3V and 2.5V, or 1.8V and 1.0V.

Working Principle

The LP3983ITLX-1.6/NOPB regulator operates by comparing an internal reference voltage (VREF) to a feedback voltage (VFB) and generating a current proportional to the difference. The output voltage of the device is proportional to VREF. When the feedback voltage is higher than the reference voltage, the regulators output voltage will be lower than VREF and vice versa. This loop action helps to maintain the output voltage at a fixed value in the presence of line, load and ambient temperature variations.

The device incorporates an on-chip current limit and thermal protection. Current limit is set to a minimum of 1.6 A continuous. To protect the device from over temperature, the maximum junction temperature can be set from -40°C to +125°C. An over-temperature shut-down and latch prevents the output voltage from increasing when the device reaches its maximum junction temperature.

Conclusion

The LP3983ITLX-1.6/NOPB is a low drop-out voltage linear voltage regulator designed for Ultra Low Output Voltage operation and provides superior stability in a very small package. It is ideal for applications where ultra-low current operation is necessary such as low-power supplies and battery-powered systems. It has integrated protection features to protect the device from over-temperature and over-current conditions.