General Description

The AOZ52371QI is a general-purpose Smart Power Stage

(SPS) for computing notebook CPU power, consisting of two

asymmetrical MOSFETs and an integrated driver for high

current, high frequency, and DC-DC converter.

The AOZ52371QI provides an output current signal

(IMON). The IMON signal can be directly used to replace

inductor DCR sensing or resistor sensing in the multiphase

voltage regulator systems without the need for temperature

compensation.

The AOZ52371QI also includes an accurate module thermal

monitor (TMON). TMON is a voltage sourced PTAT signal

with a gain of 8 mV/°C.

The MOSFETs are individually optimized for operation in the

synchronous buck configuration. The high side MOSFET

is optimized to achieve low capacitance and gate charge

for fast switching with low duty cycle operation. The low

side MOSFET has ultra-low ON resistance to minimize

conduction loss. The standard 5 mm × 5 mm QFN package

is optimally designed to minimize parasitic inductance for

minimal EMI signature.

Features

• 4.5 V to 25 V power supply range

• 60 A continuous output current

- Up to 80 A for 10 ms on pulse

- Up to 120 A for 10 μs on pulse

• Optimized for switching frequency up to 1 MHz

• Integrated current monitor output signal

• Integrated temperature monitor output signal

• Fault Indicator

• VCC33 and PVCC5 Under-Voltage Lockout (UVLO)

• Zero Current Detect Function

• Over Temperature Protection

• Standard 5 mm x 5 mm QFN-30L package

Applications

• Notebook computer

• Graphic card

• Communications Infrastructure