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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.
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
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) | $2.35 @1k |
View More
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 |
Click any title below to view the detail page where available.
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 | SIMULATION MODELS MAX5902A Macromodel | Download |
| SIMULATION MODELS MAX5902L Macromodel | Download |
| SIMULATION MODELS MAX5902L_STARTUP Test Circuit File | Download |
| SIMULATION MODELS MAX5902L Orcad Library | Download |
| SIMULATION MODELS MAX5902L_LR Test Circuit File | Download |
| SIMULATION MODELS MAX5902A_STARTUP Test Circuit File | Download |
| SIMULATION MODELS MAX5902A Orcad Library | Download |
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) | $2.35 @1k |
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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