L4954:Voltage regulator with backup and reset, overvoltage protection and low voltage warning

L4954 is a quad output voltage regulator and a three output high side driver.

The IC includes monitoring circuitry to warn the microprocessor of a low voltage condition: the LVWarn, output, sensing the slow dropping of STCAP pins voltage, gives the microprocessor time to store data.

A reset output is generated at REG4’s decay.

External protection must be provided for reverse battery protection.

Key Features

  • 4 regulators:
    • 10 V (40 mA) low dropout
    • 8.5 V (175 mA)
    • 5 V (650 mA)
    • 5 V (100 mA) standby
  • 3 high side drivers:
    • 2 A (HSD1)
    • 0.3 A (HSD2 & HSD3)
  • No external charge pump capacitors are required
  • Standby mode controlled by 3 input pins:
    • EN1 for REG1, REG2, REG3 and HSD1
    • EN2 for HSD2
    • EN3 for HSD3
  • Individual thermal shutdown
  • Logic outputs for supply undervoltage:
    • LVWARN
    • Reset
  • Independent current limiting
  • Overvoltage shutdown
  • Short circuit protection
  • Load dump protection and overvoltage
  • Shutdown
Product Specifications
DescriptionVersionSize
DS6894: Quad multifunction voltage regulator for car radio2.0190 KB
Selection Guides
DescriptionVersionSize
Power amplifiers and voltage regulators750 KB
Smart power solutions for car body applications3.01 MB
Sample & Buy
Part NumberPackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
L4954MW 15LTube----NECEAR99MOROCCO
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
L4954MW 15LAutomotiveEcopack1
Quad multifunction voltage regulator for car radio L4954
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