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  • The LD49100 provides 1 A maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. The device is stable with ceramic capacitors on the input and output.

    The ultra low-dropout voltage, low quiescent current and low-noise features make it suitable for a wide range of automotive applications. Power supply rejection is 70 dB at low frequency and starts to roll off at 10 kHz. Enable logic control function puts the LD49100 in shutdown mode, allowing a total current consumption lower than 1 μA.
    The device features a precise Power Good indicator, useful to monitor and sequence functions. Internal 1 ms soft-start circuit allows the reduction of inrush current.
    The device includes the short-circuit constant current limiting and thermal protection. The LD49100 is available in AEC-Q100 grade 1 qualified version, in a small 6-pin DFN6 (3x3 mm) with wettable flank package.

    Key Features

    • AEC-Q100 qualified
    • Temperature range: -40 °C to 125 °C
    • Input voltage from 1.5 to 5.5 V
    • Ultra low-dropout voltage (200 mV typ. at 1 A load)
    • Very low quiescent current (20 µA typ. at no load, 200 µA typ. at 1 A load, 1 µA max. in off mode)
    • Very low-noise with no bypass capacitor (30 µVRMS at VOUT = 0.8 V)
    • Output voltage tolerance: ± 2.0% at 25 °C
    • 1 A guaranteed output current
    • Wide range of output voltages available on request: 0.8 V to 4.5 V with 100 mV step and adjustable from 0.8 V
    • Logic-controlled electronic shutdown
    • Power Good function
    • Stable with ceramic capacitors COUT = 1 µF
    • Internal current and thermal limit
    • DFN6 (3x3 mm) package with wettable flanks

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STMicroelectronics - LD49100

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LD49100PU12RY
Active
DFN6 3x3 Automotive Ecopack2
LD49100PU18RY
Active
DFN6 3x3 Automotive Ecopack2
LD49100PU25RY
Active
DFN6 3x3 Automotive Ecopack2
LD49100PU33RY
Active
DFN6 3x3 Automotive Ecopack2
LD49100PURY
Active
DFN6 3x3 Automotive Ecopack2

LD49100PU12RY

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PU18RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PU25RY

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PU33RY

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PURY

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) 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.

Sample & Buy

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ECCN (EU)
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Temperature (°C) Output Voltage (V) (nom)
Budgetary Price (US$)*/Qty
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min
max
LD49100PU33RY Available at 3 distributors

Distributor availability ofLD49100PU33RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 990 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

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DIGIKEY

Stock

990

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1

Region

WORLDWIDE Order Now

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1000

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Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 3.3 0.8 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Unit Price (US$):

0.8

Country of Origin:

THAILAND

LD49100PU12RY Available at 3 distributors

Distributor availability ofLD49100PU12RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

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EUROPE Order Now

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Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 1.2 0.8 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Unit Price (US$):

0.8

Country of Origin:

THAILAND

LD49100PU25RY Available at 3 distributors

Distributor availability ofLD49100PU25RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 2.5 0.8 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Unit Price (US$):

0.8

Country of Origin:

THAILAND

LD49100PU18RY Available at 2 distributors

Distributor availability ofLD49100PU18RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 1.8 0.8 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Unit Price (US$):

0.8

Country of Origin:

THAILAND

LD49100PURY Available at 3 distributors

Distributor availability ofLD49100PURY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 300 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 976 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

300

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

976

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 - 0.8 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Unit Price (US$):

0.8

Country of Origin:

THAILAND

LD49100PU33RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8 / 1k

Distributor availability ofLD49100PU33RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 990 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

990

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.8 / 1k

Country of Origin

THAILAND

LD49100PU12RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8 / 1k

Distributor availability ofLD49100PU12RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.2

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.8 / 1k

Country of Origin

THAILAND

LD49100PU25RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8 / 1k

Distributor availability ofLD49100PU25RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.8 / 1k

Country of Origin

THAILAND

LD49100PU18RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8 / 1k

Distributor availability ofLD49100PU18RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.8 / 1k

Country of Origin

THAILAND

LD49100PURY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8 / 1k

Distributor availability ofLD49100PURY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 300 1 Order Now
RS COMPONENTS EUROPE 1000 1 Order Now
MOUSER WORLDWIDE 976 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

300

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1000

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

976

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

-

Output Tolerance (typ)

2

Output Current (A) (nom)

1

Budgetary Price (US$)* / Qty

0.8 / 1k

Country of Origin

THAILAND

(*) 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