Features
 AEC-Q100 qualified
 5 V low-drop voltage regulator (200 mA
continuous mode)
 Very low current consumption in standby mode
(typ. 15 μA)
 ST SPI interface for control and diagnostics
 Window watchdog and fail-safe functionality
 Two separate power supply pins
 Three half-bridge drivers to control external
MOSFETs (configurable by SPI)
 Full drive of external MOSFETs down to 6 V
input voltage
 Input pin for each gate driver (with crosscurrent
protection)
 Two-stage charge pump supporting 100% duty
cycle
 PWM operation up to 80 kHz (not restricted)
 Current-sense amplifier (configurable by SPI)
 Disable input to turn off gate driver outputs
 Analog multiplexer output to monitor external
power supply voltages and internal junction
temperature
 Advanced BEMF detection IP
 Overcurrent protection (programmable)
 Drain-source monitoring and open-load
detection
 TQFP48 7 x 7 x 1 mm with Exposed Pad
(4.5 x 4.5 mm) package

Description
The L99ASC03G is a multifunctional system IC
designed for three-phase motor control
applications.
The device features a voltage regulator to supply
an external microcontroller and an operation
amplifier for motor current sensing. It is designed
to control six external N-channel MOSFETs in
bridge configuration to drive three-phase motors
in automotive applications. All gate driver outputs
are controlled by separate inputs.
The integrated Serial Peripheral Interface (SPI)
makes it possible to adjust device parameters,
control all operating modes and read out
diagnostic information.

Applications
Mechatronic three-phase motor application such
as engine cooling fans, fuel pumps, water pumps,
oil pumps