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L5953

STMicroelectronics

Multiple switching voltage regulator

L5953
L5953

PDF File L5953 PDF File

Description
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 diagram and electrical specifications .
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6 Functional description .
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14 2.
1 2.
2 2.
3 2.
4 2.
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6 REG1 stand-by regulator .
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14 Reset .
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14 Low voltage warning .
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