Description:The ISL80138 is a high voltage, adjustable VOUT low quiescent current linear regulator ideally suited for “always-on” and “keep alive” applications. The ISL80138 operates from an input voltage of +6V to +40V under normal operating conditions and consumes only 18µA of quiescent current at no load. The ISL80138 features an EN pin that can be used to put the device into a low-quiescent current shutdown mode where it draws only 2µA of supply current. The device features over-temperature shutdown and current lim
Renesas provides a recommended PCB layout in the ISL80138 evaluation board user manual, which includes guidelines for component placement, thermal management, and routing. Following this layout can help ensure optimal performance and minimize noise and EMI issues.
The selection of input and output capacitors depends on the specific requirements of your application, including the input voltage range, output voltage, and current requirements. Renesas provides guidance on capacitor selection in the datasheet and application notes, including recommended values and types for different applications.
The ISL80138IVEAJZ-T is rated for operation from -40°C to +125°C, but the maximum ambient temperature range for reliable operation may be lower depending on the specific application and thermal management. It's recommended to consult the datasheet and thermal management guidelines to ensure reliable operation in your specific application.
The ISL80138IVEAJZ-T has built-in overcurrent protection and short-circuit protection features. To implement these features, you can use the OCP and SCP pins to detect overcurrent and short-circuit conditions, and then use external circuitry to shut down the device or take other protective actions. Renesas provides guidance on implementing these features in the datasheet and application notes.
The recommended startup sequence for the ISL80138IVEAJZ-T involves applying the input voltage, then releasing the EN pin from its shutdown state, and finally applying the output load. This sequence helps ensure proper startup and minimizes the risk of damage or malfunction.
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ISL80138IVEAJZ-T Overview
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