This is a comprehensive datasheet for the Supertex HV100/HV101 hotswap controllers. Here's a breakdown of the key information, organized for clarity:

1. Core Functionality:

️· Hotswap Control: The primary function is to safely connect and disconnect a power source to a system without causing glitches or damage. It manages inrush current and provides protection against shorts.
️· Power Management: Includes features for undervoltage lockout (UVLO), short-circuit protection, and auto-retry functionality.
️· Simple Design: Designed to minimize external components for cost and space savings.

2. Key Features & Benefits:

️· Auto-Adapt Mechanism: Normalizes hotswap time regardless of the pass element (MOSFET) and load capacitance (C\_LOAD), ensuring consistent performance.
️· Short Circuit Protection: Detects short circuits and shuts down the system after a short delay (2.5 seconds) before attempting a restart.
️· UVLO (Undervoltage Lockout): Prevents operation if the input voltage is too low, protecting the system.
️· Auto-Retry: Automatically retries to power on the system after a short circuit or undervoltage condition.
️· Compact Package: 3-Lead SOT-223 package minimizes board space.
️· No External Compensation: Designed to function with minimal external components.
️· PWRGD Output (Optional): Can be implemented with external components to signal when the output is stable.
️· Suitable for PoE & VoIP: Designed for applications like Powered Ethernet (Power-over-LAN) and Voice-over-IP.

3. Technical Details:

️· Inrush Current Control: The controller regulates the inrush current during power-up. The datasheet provides a formula to calculate inrush current: `I_INRUSH(PEAK) = (C_ISS / C_RSS) * 2.5e3 * C_LOAD`
️· UVLO Threshold: Adjustable via external components (e.g., Zener diode).
️· Short Circuit Detection Time: Approximately 2.5 seconds.
️· Auto-Retry Delay: 2.5 seconds.
️· Operating Voltage: Not explicitly stated in the provided snippet, but it is designed for typical power supply voltages.

4. Application Notes & Design Considerations:

️· Pass Element (MOSFET): The controller works in conjunction with an external MOSFET as the pass element.
️· Load Capacitance (C\_LOAD): The load capacitance significantly affects the inrush current.
️· External Components: The datasheet outlines how to add external components for features like inrush current adjustment, UVLO adjustment, and gate clamping.
️· Turn-On Clamp: Provides protection against current spikes during power-up.
️· Calculating Inrush: The formula provided allows designers to calculate the expected inrush current.
️· PWGRD Signal: Allows designers to implement a power-good signal.



5. Package Information:

️· Package Type: 3-Lead SOT-223
️· Detailed Package Outline: A link to the Supertex website for the latest package specifications is provided.

Overall:

This datasheet is a valuable resource for engineers designing power management systems, especially for applications requiring safe and reliable hotswap functionality. The HV100/HV101 offers a compact and easy-to-use solution with a good balance of features and performance.