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