MAX4370：Current-Regulating Hot-Swap Controller with DualSpeed/BiLevel Fault Protection
The MAX4370 is a circuit-breaker IC designed to offer protection in hot-swap applications using Maxim's DualSpeed/BiLevel™ detection. This controller, designed to reside either on the backplane or on the removable card, is used to protect a system from start-up damage when a card or board is inserted into a rack with the main system power supply turned on. The card's discharged filter capacitors provide a low impedance that can momentarily cause the main power supply to collapse. The MAX4370 prevents this start-up condition by providing inrush current regulation during a programmable start-up period, allowing the system to stabilize safely. In addition, two on-chip comparators provide DualSpeed/BiLevel short-circuit protection and overcurrent protection during normal operation. The MAX4370 provides protection for a +3V to +12V single supply. An internal charge pump generates the controlled gate drive for an external N-channel MOSFET power switch. The MAX4370 latches the switch off after a fault condition until an external reset signal clears the device. Other features include a status pin to indicate a fault condition, an adjustable overcurrent response time, and a power-on reset comparator. The MAX4370 is specified for the extended-industrial temperature range (-40°C to +85°C) and is available in an 8-pin SO package.
Key Features
| MAX4370: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX4370 Data Sheet | MAX4370.pdf |
Parametrics
| Part Number | VIN (V) | VIN (V) | Circuit Breaker/ Current Limit | Circuit Breaker/Current Limit Threshold (mV) | Fault Condition Control | Channels | Positive/Negative Rail | Features | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|
| min | max | See Notes | ||||||||
| MAX4370 | 2.7 | 13.2 | Current Limit | 50 | Latched Off | 1 | Positive | DualSpeed/BiLevel Current Limit | SOIC(N)/8 | $3.25 @1k |
Quality and Environmental Data
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX4370ESA | No Longer Available | MAX4370ESA+ | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No |
| MAX4370ESA+ | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX4370ESA+T | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX4370ESA-T | No Longer Available | MAX4370ESA+T | N.SO;8 pin | -40°C to +85°C | See data sheet |
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