MAX5921AESA+
Active-48V HOT-SWAP CONTROLLERS WITH EXTERNAL RSENSEAND HIGH GATE PULLDOWN CURRENT
MAX5921AESA+
Active-48V HOT-SWAP CONTROLLERS WITH EXTERNAL RSENSEAND HIGH GATE PULLDOWN CURRENT
Description
General part information
MAX5921 Series
The MAX5921/MAX5939 hot-swap controllers allow a circuit card to be safely hot plugged into a live backplane. The MAX5921/MAX5939 operate from -20V to -80V and are well suited for -48V power systems. These devices are pin compatible with both the LT1640 and LT4250 and provide improved features over these devices.The MAX5921/MAX5939 provide a controlled turn-on to circuit cards preventing damage to board connectors, board components, and preventing glitches on the power-supply rail. The MAX5921/MAX5939 provide undervoltage, overvoltage, and overcurrent protection. These devices ensure that the input voltage is stable and within tolerance before applying power to the load.Both the MAX5921 and MAX5939 protect a system against overcurrent and short-circuit conditions by turning off the external MOSFET in the event of a fault condition. The MAX5921/MAX5939 protect against input voltage steps by limiting the load current to a safe level without turning off power to the load.The device features an open-drain power-good status output, active-low PWRGD or PWRGD for enabling downstream converters (seeSelector Guide). A built-in thermal shutdown feature is also included to protect the external MOSFET in case of overheating. The MAX5939 features a latched fault output. The MAX5921 contains built-in autoretry circuitry after a fault condition.The MAX5921/MAX5939 are available in an 8-pin SO package and operate in the extended -40°C to +85°C temperature range.ApplicationsBase-Station Line CardsCentral-Office Line CardsNetwork Routers and SwitchesServer Line CardsTelecom Line Cards
Technical Specifications
Parameters and characteristics for this part
| Specification | MAX5921AESA+ |
|---|---|
| Applications | -48V |
| Current - Supply | 700 µA |
| Features | Auto Retry, Fault Timeout, Thermal Limit |
| Internal Switch(s) | No |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Operating Temperature (Max) | 85 °C |
| Operating Temperature (Min) | -40 °C |
| Package Length | 0.154 in |
| Package Name | 8-SOIC |
| Package Width | 3.9 mm |
| Programmable Features | UVLO, OVP, Circuit Breaker, Current Limit |
| Type | Hot Swap Controller |
| Voltage - Supply (Maximum) | -20 V |
| Voltage - Supply (Minimum) | -80 V |
Pricing
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CAD
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