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High-Current, High-Performance Smart Power Stage
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AOZ5277QI High-Current, High-Performance
Smart Power Stage General Description Features The AOZ5277QI is a general-purpose Smart Power
Stage (SPS) consisting of two asymmetrical MOSFETs
and an integrated driver for high current, high frequency
DC-DC converters. 3V to 20V power supply range 30V HS MOSFET provides better system ruggedness 60A continuous output current – Up to 100A for 10ms on pulse
– Up to 150A for 10µs on pulse The AOZ5277QI provides an output voltage signal
(IMON), which represents the real-time module current
with a gain of 5mV/A. The IMON signal can be directly
used to replace inductor DCR sensing or resistor sensing
in multiphase voltage regulator systems without the need
for temperature compensation. Optimized for switching frequency up to 1MHz Integrated current monitor (5mV/A) with 5% accuracy over temperature Integrated temperature monitor (8mV/°C) with 2% accuracy The AOZ5277QI also includes an accurate module
temperature monitor (TMON). TMON is a voltage
sourced signal with a gain of 8mV/°C. Fault Indicator Under-Voltage LockOut (UVLO) on VCC Under-Voltage LockOut (UVLO) on VIN The MOSFETs are individually optimized for operation in
the synchronous buck configuration. The High-Side (HS)
MOSFET is optimized to achieve low capacitance and
gate charge for fast switching with low duty cycle
operation. The Low-Side (LS) MOSFET has ultra-low ON
resistance to minimize conduction loss. The standard
5mm x 6mm QFN package is optimally designed to
minimize parasitic inductance for minimal EMI signature. High-Side MOSFET Over-Current and Short-Circuit Protection Zero Current Detect Function (ZCD) Over Temperature Protection (OTP) Standard QFN5x6-39L package Applications Server systems High end CPU/GPU power stage Communications Infrastructure Typical Application Circuit
3V ~ 20V
OCSET/ZCD VIN
BOOT VOS …
