Features and Benefits
- Provides Safe Hot Swap for +10V to +65V Power Supplies
- IEEE 802.3AF Compliant (MAX5917A)
- Startup into 500µF Load (MAX5917A)
- 280mA Current Limit for MAX5910
- 567mA Current Limit for MAX5917A
- 420mA Current Limit for MAX5917B
- Zero-Current Load Detection
- Integrated 2.2Ω Power FET
- Status Output Reports Fault Conditions
- Internal Switch-Protection Circuitry
- Built-In Thermal Shutdown
The MAX5910/MAX5917 are fully integrated hot-swap switches for positive supply rails. These devices allow the safe insertion and removal of circuit cards into live backplanes or ports without causing glitches on the backplane power-supply rail. They also monitor various circuit parameters and disconnect the load if a fault condition occurs, alerting the host with a logic-level active-low IFAULT output. The MAX5910/MAX5917 operate over a +10V to +65V input voltage range. They are designed to permit hot plugging of an internet appliance such as an IP phone but are not limited to that application.
During startup, an internal power FET regulates the current between the backplane power source and the load to 280mA for the MAX5910, 567mA for the MAX5917A, and 420mA for the MAX5917B. After startup, the FET is fully enhanced to reduce its on-resistance. To ensure robust operation, the MAX5910/MAX5917 contain built-in safety features that prevent damage to the internal FET. They include an enable input, which responds to positive logic signals (+3.3V or +5V), allowing the host system to disconnect the load.
The MAX5910/MAX5917 Simple Swapper hot-swap ICs monitor four parameters for fault conditions: undervoltage lockout (UVLO), power-not-good, zero-current detection, and thermal shutdown. These devices are available in the extended temperature range, -40°C to +85°C. The MAX5910 comes in an 8-pin SO package and the MAX5917A/B is available in a 16-pin SO package.
- Internet Appliances
- IP Phones
- Network Hubs, Switches, Routers
- Network Hubs, Switches, Routers
- Remote Power Distribution
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
MAX5917 Reliability Data1/12/202352K
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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