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Power Protection and Control 
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MAX5947A, MAX5947B, MAX5947C
Positive High-Voltage, Hot-Swap Controllers
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Hot Swap Controllers
| VIN (V) (min) | 9 |
| VIN (V) (max) | 80 |
| # Channels | 1 |
| Circuit Breaker/ Current Limit | Current Limit |
| Fault Condition Control | Latched Off Periodic Retry |
| Positive/Negative Rail | Positive |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.9 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Positive High-Voltage, Hot-Swap Controllers | Jul 27, 2004 |
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) | 80 |
| # Channels | 1 |
| Circuit Breaker/ Current Limit | Current Limit |
| Fault Condition Control | Latched Off Periodic Retry |
| Positive/Negative Rail | Positive |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.9 |
Key Features
- Pin- and Function-Compatible with the LT1641-2 (MAX5947B)
- Provides Safe Hot Swap for +9V to +80V Power-Supply Range (MAX5947A/B/C)
- Safe Board Insertion and Removal from Live Backplanes
- Latched/Autoretry Management
- Active-Low or Active-High Power-Good Output
- Programmable Foldback Current Limiting
- High-Side Drive for an External N-Channel MOSFET
- Built-In Thermal Shutdown
- Undervoltage Lockout (UVLO)
- Overvoltage Protection
- User-Programmable Supply Voltage Power-Up Rate
Applications/Uses
- 24V/48V Industrial/Alarm Systems
- Electronic Circuit Breakers
- Hot Board Insertion
- Industrial High-Side Switch/Circuit Breakers
- Network Routers and Switches
Description
The MAX5933A-MAX5933F/MAX5947A/B/C fully integrated hot-swap controllers for +9V to +80V positive supply rails (MAX5947A/B/C), allow for the safe insertion and removal of circuit cards into live backplanes without causing glitches on the backplane power-supply rail. The MAX5947B is pin- and function-compatible with the LT1641-2. The other devices offer added features such as a choice of active-high or active-low power-good outputs (PWRGD/PWRGD-bar), latched/autoretry fault management, and autoretry duty-cycle options of 3.75% or 0.94% (see the Selector Guide).
The MAX5933A-MAX5933F are available with a default undervoltage lockout threshold of +31V and operate over a supply voltage range of +33V to +80V. The MAX5947A/B/C are available with a default undervoltage of +8.3V. All devices feature a programmable analog foldback current limit. If the device remains in current limit for more than a programmable time, the external n-channel MOSFET is either latched off (MAX5933A/MAX5933C/MAX5947A) or is set to automatically restart after a timeout delay (MAX5933B/MAX5933D/MAX5933E/MAX5933F/MAX5947B/MAX5947C).
The MAX5933_ and MAX5947_ operate in the extended temperature range of -40°C to +85°C. These devices are available in an 8-pin SO package.
The MAX5933A-MAX5933F are available with a default undervoltage lockout threshold of +31V and operate over a supply voltage range of +33V to +80V. The MAX5947A/B/C are available with a default undervoltage of +8.3V. All devices feature a programmable analog foldback current limit. If the device remains in current limit for more than a programmable time, the external n-channel MOSFET is either latched off (MAX5933A/MAX5933C/MAX5947A) or is set to automatically restart after a timeout delay (MAX5933B/MAX5933D/MAX5933E/MAX5933F/MAX5947B/MAX5947C).
The MAX5933_ and MAX5947_ operate in the extended temperature range of -40°C to +85°C. These devices are available in an 8-pin SO package.
Technical Docs
| Data Sheet | Positive High-Voltage, Hot-Swap Controllers | Jul 27, 2004 |
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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