L5953

L5953 Multiple switching voltage regulator 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 PowerSO36 ■ ■ ■ ■ ■ ■ ■ Protections ■ ■ ■ ■ Over voltage protection Internal current limiting Thermal shutdown ESD SPI functions ■ 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. 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 Device summary Part number L5953 ■ Table 1. Package PowerSO36 Packing Tray September 2007 Rev 2 1/31 www.st.com 1 Free Datasheet http://www.datasheet4u.com/ Contents L5953 Contents 1 2 Block ...