STSPIN32G4 datasheet(15/48 Pages) STMICROELECTRONICS

15 / 48 page

Device description

The STSPIN32G4 is a system-in-package embedding one MCU (STM32G431) and a triple half-bridge gate driver

suitable for high performance 3-phase brushless motor applications.

5.1

Power management section

The power management section of the device is composed by:

•

One buck regulator generating the VCC voltage (gate driver supply) from the main supply.

•

One LDO linear regulator generating 3.3 V (VREG3V3) starting from the VREGIN input voltage (ranging

between 3.3 V and 15 V).

•

One low quiescent linear regulator generating low precision 3.3 V starting from the main supply.

The VM pin is the main supply voltage of the device.

When the REG3V3 supply is below VREG3V3(On), the control logic is not operative, and the internal registers are

reset to the default.

Figure 4. Power-up sequence (REGIN shorted with VCC)

8 V

3.3 V

VCC = VREGIN

VREG3V3

LS gate drivers

leave UVLO

condition

Control logic

is operative

VON,Buck

VCC(On)

7/32 x VCC

VREG3V3(On)

tSS,Buck

5.1.1

VCC buck regulator

The device integrates a buck regulator generating the supply voltage for the gate drivers (VCC) starting from the

motor supply (VM). The regulated voltage supplies the gate driving circuitry, charges the bootstrap capacitors and

supplies external circuitry with a maximum overall consumption of 200 mA.

STSPIN32G4

Device description

DS13630 - Rev 1

page 15/48

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