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

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  • 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

Circuit Diagram

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Part Number
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
More info
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min
max
L4954 MW 15L Tube -40 85
Active
- - EAR99
MORE INFO

Country of Origin:

MOROCCO

No availability of distributors reported, please contact our sales office

L4954

Package

MW 15L

Packing Type

Tube

Unit Price (US$)

*

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

MOROCCO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4954
Active
MW 15L Automotive Ecopack1

L4954

Package:

MW 15L

Material Declaration**:

Marketing Status

Active

Package

MW 15L

Grade

Automotive

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.