LMS1585AISX-1.5/NOPB

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The Texas Instruments LMS1585AISX-1.5/NOPB is a low-noise, low-dropout linear regulator (LDO) designed for use in portable, battery powered applications such as mobile phones, PDAs, and portable music devices. It is in the Power Management IC (PMIC) family of voltage regulators, and specifically in the Linear voltage regulator sub-category.

The LMS1585AISX-1.5/NOPB is a high precision linear voltage regulator with an adjustable output range of 0.8V to 1.5V. It provides a low output threshold resistance of only 18 mΩ to ensure efficient regulation and enable high ripple rejection and tight output voltage regulation. The device also features a low quiescent current of only 7 µA, enabling low standby power consumption.

The LMS1585AISX-1.5/NOPB has an integrated shutdown buffer circuit that allows the device to enter either a low current shutdown mode or a low power Diode mode. In Diode mode, the device can be used to reduce higher voltage sources to lower voltages. Both of these features are especially useful for portable applications, where power conservation is one of the major design challenges.

The LMS1585AISX-1.5/NOPB is designed to operate over a wide input voltage range, from 2.4 V to 6.3 V. This feature is especially useful for portable applications, as it allows the device to handle different charge levels from a single battery without needing any manual regulation.

The LMS1585AISX-1.5/NOPB also features an external startup control circuit, which provides the user with a higher level of control over the startup sequence. The user can select the sequence of multiple LDOs, at what time they should start up, and with what delay if necessary. This feature simplifies the system design and enables better power management in multi-rail systems.

The LMS1585AISX-1.5/NOPB operates in either active or standby mode, depending on the system requirements. In active mode, it provides up to 350 mA of output current and has a high ripple rejection of 70 dB, making it suitable for applications where noise and ripple are a concern. In standby mode, the device operates at a low quiescent current of just 7 µA, making it ideal for applications where power conservation is critical.

The output voltage range of the LMS1585AISX-1.5/NOPB can be adjusted using an external resistive divider, and the accuracy of the output voltage can be set using a trim pin. The OVP feature is also available to guarantee protection against output voltage overshoot.

In conclusion, the TI LMS1585AISX-1.5/NOPB is a versatile and reliable linear regulator suitable for a wide range of portable applications. It offers adjustable output voltage control, low quiescent current operation, and an external startup control circuit. The device also features high ripple rejection and OVP protection, making it an ideal choice for applications requiring both power efficiency and noise reduction.

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