12 V, 7 mΩ RDSon Hot-Swap Protection Device with Current Monitoring
DESCRIPTION
The MP5021B is a hot-swap protection device designed to
protect circuitry on its output from transients on its input. Also,
it protects its input from undesired shorts and transients
coming from its output.
At start-up, the slew rate at the output limits the inrush
current. An external capacitor at SS controls the slew rate.
The maximum output load is current limited using a sense
FET topology where a low-power resistor from ISET to ground
controls the magnitude of the current limit.
An internal charge pump drives the gate of the power device,
allowing a power FET with a very low on resistance of 7 mΩ.
The MP5021B includes an IMON option to produce a voltage
proportional to the current through the power device, as set by
a resistor from IMON to ground.
The MP5021B includes an optional discharge function that
provides a discharge path for the external output capacitor
when the part is disabled. Fault protections include current-
limit protection, thermal shutdown, and damaged MOSFET
detection. Both the current limit and thermal shutdown have
user-settable auto-retry and latch-off mode. Also, the device
features over-voltage protection (OVP) and under-voltage
protection (UVP).
The MP5021B is available in a 3mm x 5mm QFN package.
FEATURES
• 4.8 V to 16 V Operating Input Range
• Integrated 7 mΩ Power FET
• Adjustable Current Limit
• Output Current Measurement
• ±5% Current Monitor Accuracy
• Fast Response (<200 ns) for Short Protection
• PG Detector and FLTB Indication
• PG Assert Low at VIN = 0
• Damaged MOSFET Detection
• External Soft-Start
• Programmable EN Blanking Time
• Under/Over-Voltage Lockout
• Thermal Protection
• Small QFN-22 (3mmx5mm) Package
APPLICATIONS
• Hot Swappable
•PC Cards
•Disk Drives
• Laptops
All MPS parts are lead-free and adhere to the RoHS directive. For MPS
green status, please visit MPS website under Products, Quality
Assurance page. "MPS" and "The Future of Analog IC Technology" are
registered trademarks of Monolithic Power Systems, Inc.
MP5021B
TYPICAL APPLICATION
© 2015 Monolithic Power Systems
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