LD49100

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1 A, low quiescent current, low-noise voltage regulator with soft start - Automotive grade

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Product overview

Description

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.

  • All 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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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LD49100PU10RY
Active
DFN6 3x3 Automotive Ecopack2
LD49100PU12RY
Active
DFN6 3x3 Automotive Ecopack2
LD49100PU15RY
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

LD49100PU10RY

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PU12RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PU15RY

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**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PU33RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LD49100PURY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

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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Output Voltage (V) (nom)
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LD49100PU33RY
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LD49100PU33RY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PU33RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

LD49100PU12RY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PU12RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

1.2

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

LD49100PU10RY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PU10RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

1

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

LD49100PU25RY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PU25RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

2.5

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

LD49100PU18RY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PU18RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

1.8

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

LD49100PU15RY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PU15RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

1.5

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

LD49100PURY Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

LD49100PURY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

-

Output Tolerance (typ):

2

Output Current (A) (nom):

1

Distributor Name

Distributor reported inventory date:

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