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MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Hot Swap Controllers
| VIN (V) (min) | 9 |
| VIN (V) (max) | 72 |
| # Channels | 1 |
| Circuit Breaker/ Current Limit | Circuit Breaker |
| Circuit Breaker/Current Limit Threshold (mV) | 300 to 500 |
| Fault Condition Control | Latched Off Periodic Retry Programmable |
| Positive/Negative Rail | Positive |
| Features | Requires No RSENSE |
| Package/Pins | SOT23/6 TDFN/6 |
| Budgetary Price (See Notes) | 2.49 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | +72V SOT23/TDFN Simple Swapper Hot-Swap Controllers | Jan 12, 2007 | |
| App Note | Circuit Removes Relay-Contact Bounce | ||
| App Note | Hot-Swap Controllers Improve Power-Supply Sequencing | ||
| App Note | Hot-Swap Controller IC Makes Adjustable Circuit Breaker | ||
| Tutorial | Advantages of IC-Based Hot-Swap Circuit Protection |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Hot Swap Controllers
| VIN (V) (min) | 9 |
| VIN (V) (max) | 72 |
| # Channels | 1 |
| Circuit Breaker/ Current Limit | Circuit Breaker |
| Circuit Breaker/Current Limit Threshold (mV) | 300 to 500 |
| Fault Condition Control | Latched Off Periodic Retry Programmable |
| Positive/Negative Rail | Positive |
| Features | Requires No RSENSE |
| Package/Pins | SOT23/6 TDFN/6 |
| Budgetary Price (See Notes) | 2.49 |
Key Features
- Wide +9V to +72V Operation
- Requires No External Sense Resistor
- Drives External p-Channel MOSFET
- Limits Inrush Current
- Circuit-Breaker Function
- Less than 2mA Quiescent Current
- ON/Active-Low OFF Input Permits Load Power-Supply Control and Sequencing
- Adjustable Undervoltage Lockout
- Power-Good Output with +72V Rating
- Latching or Automatic Retry Fault Management
- Thermal Shutdown Helps Protect the External MOSFET
- Available in Two Small Packages
- 6-Pin TDFN and SOT23
Applications/Uses
- Base-Station Line Cards
- Industrial Systems
- Network Hubs, Switches, Routers
- Network Hubs, Switches, Routers
- RAID
- Servers
Description
The MAX5902/MAX5903 are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane without causing a glitch on the power-supply rail. These devices operate from +9V to +72V and provide the simplest hot-swap solution by eliminating all external components except the external p-channel MOSFET.
The MAX5902/MAX5903 limit the inrush current to the load and provide a circuit-breaker function for overcurrent protection. During startup the circuit-breaker function is disabled and the MAX5902/MAX5903 limit the inrush current by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the circuit-breaker function is enabled and the MAX5902/MAX5903 provide overcurrent protection by monitoring the voltage drop across the external MOSFET's on-resistance.
The MAX5902/MAX5903 include an undervoltage lockout (UVLO) function, ON/active-low OFF control input, and a power-good status output, active-low PGOOD (MAX5902) or PGOOD (MAX5903). A built-in thermal shutdown feature is also included to protect the external MOSFET in case of overheating.
The MAX5902/MAX5903 offer latched or autoretry fault management and are available with 300mV, 400mV or 500mV circuit-breaker thresholds. Both the MAX5902 and MAX5903 are available in small SOT23 and TDFN packages, and are specified for the extended -40°C to +85°C temperature range. For specific ordering information, see the Selector Guide at the end of the data sheet.
The MAX5902/MAX5903 limit the inrush current to the load and provide a circuit-breaker function for overcurrent protection. During startup the circuit-breaker function is disabled and the MAX5902/MAX5903 limit the inrush current by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the circuit-breaker function is enabled and the MAX5902/MAX5903 provide overcurrent protection by monitoring the voltage drop across the external MOSFET's on-resistance.
The MAX5902/MAX5903 include an undervoltage lockout (UVLO) function, ON/active-low OFF control input, and a power-good status output, active-low PGOOD (MAX5902) or PGOOD (MAX5903). A built-in thermal shutdown feature is also included to protect the external MOSFET in case of overheating.
The MAX5902/MAX5903 offer latched or autoretry fault management and are available with 300mV, 400mV or 500mV circuit-breaker thresholds. Both the MAX5902 and MAX5903 are available in small SOT23 and TDFN packages, and are specified for the extended -40°C to +85°C temperature range. For specific ordering information, see the Selector Guide at the end of the data sheet.
Technical Docs
| Data Sheet | +72V SOT23/TDFN Simple Swapper Hot-Swap Controllers | Jan 12, 2007 | |
| App Note | Circuit Removes Relay-Contact Bounce | ||
| App Note | Hot-Swap Controllers Improve Power-Supply Sequencing | ||
| App Note | Hot-Swap Controller IC Makes Adjustable Circuit Breaker | ||
| Tutorial | Advantages of IC-Based Hot-Swap Circuit Protection |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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