Purchase MAX5939, In-stock MAX5939 From SeekIC.
Part Number: MAX5939
Description: The MAX5921/MAX5939 hot-swap controllers allow a circuit card to be safely hot plugged into a live bac...
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MAX5939
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Suppliers
DataSheet
General Description
MAX5939 General Description
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, PWRGD or PWRGD for enabling downstream converters (see Selector 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.
MAX5939 Maximum Ratings
All Voltages Are Referenced to VEE, Unless Otherwise Noted
Supply Voltage (VDD - VEE )............................-0.3V to +100V
DRAIN, PWRGD, PWRGD ................................-0.3V to +100V
PWRGD to DRAIN ........................................... -0.3V to +95V
PWRGD to VDD.................................................-95V to +85V
SENSE (Internally Clamped) ..........................-0.3V to +1.0V
GATE (Internally Clamped) .............................-0.3V to +18V
UV and OV......................................................-0.3V to +60V
Current into SENSE...................................................+40mA
Current into GATE...................................................+300mA
Current into Any Other Pin........................................+20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)...........471mW
Operating Temperature Range ................-40°C to +85°C
Junction Temperature ........................................... +150°C
Storage Temperature Range ..................-65°C to +150°C
Lead Temperature (soldering, 10s) ....................... +300°C
Supply Voltage (VDD - VEE )............................-0.3V to +100V
DRAIN, PWRGD, PWRGD ................................-0.3V to +100V
PWRGD to DRAIN ........................................... -0.3V to +95V
PWRGD to VDD.................................................-95V to +85V
SENSE (Internally Clamped) ..........................-0.3V to +1.0V
GATE (Internally Clamped) .............................-0.3V to +18V
UV and OV......................................................-0.3V to +60V
Current into SENSE...................................................+40mA
Current into GATE...................................................+300mA
Current into Any Other Pin........................................+20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)...........471mW
Operating Temperature Range ................-40°C to +85°C
Junction Temperature ........................................... +150°C
Storage Temperature Range ..................-65°C to +150°C
Lead Temperature (soldering, 10s) ....................... +300°C
MAX5939 Features
· Allows Safe Board Insertion and Removal from a Live -48V Backplane
· Pin-Compatible with LT1640 and LT4250
· Circuit Breaker Immunity to Input Voltage Steps and Current Spikes
· 450mA GATE Pulldown Current During Short- Circuit Condition
· Exponential GATE Pulldown Current
· Withstands -100V Input Transients with No External Components
· Programmable Inrush and Short-Circuit Current Limits
· Operates from -20V to -80V
· Programmable Overvoltage Protection
· Programmable Undervoltage Lockout with Built-In Glitch Filter
· Overcurrent Fault Integrator
· Powers Up into a Shorted Load
· Power-Good Control Output
· Thermal Shutdown Protects External MOSFET
· Pin-Compatible with LT1640 and LT4250
· Circuit Breaker Immunity to Input Voltage Steps and Current Spikes
· 450mA GATE Pulldown Current During Short- Circuit Condition
· Exponential GATE Pulldown Current
· Withstands -100V Input Transients with No External Components
· Programmable Inrush and Short-Circuit Current Limits
· Operates from -20V to -80V
· Programmable Overvoltage Protection
· Programmable Undervoltage Lockout with Built-In Glitch Filter
· Overcurrent Fault Integrator
· Powers Up into a Shorted Load
· Power-Good Control Output
· Thermal Shutdown Protects External MOSFET
MAX5939 Typical Application
·Telecom Line Cards
·Network Switches/Routers
·Central-Office Line Cards
·Server Line Cards
·Base-Station Line Cards
·Network Switches/Routers
·Central-Office Line Cards
·Server Line Cards
·Base-Station Line Cards
MAX5939 Connection Diagram
MAX5939
PDF/DataSheet Download
- Datasheet: MAX5939
- File Size: 723372 KB
- Manufacturer: MAXIM
- Click here to Download
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