MAX16550
Integrated Protection IC on 12V Bus with an Integrated MOSFET, Lossless Current Sensing, and PMBus Interface
Industry's First 30A Protection IC with Integrated MOSFET
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Overview
Features and Benefits
- MAX16550—30A Protection ICn
- High-Density (4mm x 4.5mm for 30A): Less than 25% of the Board Area of Conventional Solutions
- Monolithic Integration of Power, Control, and Monitoring
- Integrated Power MOSFET with 1.9mΩ Total Resistance in 12V Power Path (RDS(ON) Including Package)
- Integrated Lossless, Precise Current Sensing
- Integrated LDO Provides VDD Supply (1.8V Bias Supply)
- Enables Advanced System Power Management—PMBus/SMBus Telemetry with Extensive Status Monitoring and Reporting
- Load Current Indicator (ILOAD) Pin Provides Analog Output Current Reporting with High Accuracy
- Programmable Soft-Start for Inrush Current Limiting
- Increases Power-Supply Reliability with IC Self-Protection Features
- Very Fast Fault Detection and Isolation
- VIN to VOUT Short Protection During Startup
- Overtemperature Protection
- Three Levels of Overcurrent Protection
- Programmable Moderate OCP
- Programmable Severe OCP Provides Isolation < 5µs.
- Fail-Safe Safe OCP Provides Isolation < 250ns.
Product Details
The MAX16550 is a protection IC with an integrated low-resistance MOSFET and lossless currentsense circuitry featuring SMBus/PMBus™ control and reporting. This IC is designed to provide the optimum solution for distribution, control, monitoring and protection of the system’s 12V power supply. An internal LDO provides the supply voltage for the protection IC.
If no fault is detected, the IC initiates the startup and has been designed to provide controlled, monotonic startup. Programmable soft-start ramp and delay is implemented to limit the in-rush current during startup.
The IC monitors the current and voltage of the 12V system power rail and provides multiple levels of protection with fast turn-off if a fault is detected.
Maxim’s patented, lossless current sense provides high accuracy current sensing over load and temperature, improving overall system-energy efficiency, and reducing dissipation.
Output voltage is monitored at all times. If at any time the output voltage falls below the programmable output undervoltage-lockout threshold, the PWRGD signal is asserted low. If at any time the input voltage falls below the programmable input undervoltage-lockout threshold, the PWRGD signal is asserted low. The IC can be programmed through PMBus to provide input overvoltage protection. Input overvoltage protection is disabled by default. When enabled through PMBus, if the input voltage exceeds a programmable overvoltage threshold, the MOSFET is latched off and a fault indicated.
Applications
- 240VA
- Circuit Breaker/E-Fuse, Hot Swap
- Integrated Protection IC on 12V
- Servers, Networking, Storage, Communication Equipment and AC/DC Power Supplies
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Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.