Description

The L5953 is the integration of one switching regulator, two linear voltage regulators, two low voltage warnings and two high side drivers. It has a stand-by operation mode (low current consumption) where only the stand-by voltage regulator plus the low voltage warnings are active. The other regulators and high side drivers are controlled by the SPI interface.

Features

■ PWM: adjustable 2.5/10V - 1A switching voltage regulator

■ External POWER MOS ability for output current enhancement

■ Synchronization function

■ REG1- Linear low drop 3.3/5V - 250mA STBY voltage regulator (low current consumption) with RESET

■ REG2- Linear voltage regulator 1.5V to 3.3V externally adjustable - 300mA maximum current

■ HSD1 : 500mA High side driver

■ HSD2 : 200mA High side driver

■ SPI Interface

■ SPI Diagnostics HSD1, HSD2

■ Double switching frequency SPI selectable

■ Double inpuT LVW SPI functions

SPI functions

■ Input controls

– Turn-on/off PWM

– Turn-on/off REG2

– Turn-on/off HSD1

– Turn-on/off HSD2

– Switching frequency selection f1- f2

■ Output functions:

– HSD1 & HSD2 short to gnd, open load and short to battery (Test mode)

– Thermal warning

Protections

■ Over voltage protection

■ Internal current limiting

■ Thermal shutdown

■ ESD