Very low drop and low noise BiCMOS 300 mA voltage regulator

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  • The LDS3985 provides up to 300 mA, from 2.5 V to 6 V input voltage. It is stable with ceramic and high quality tantalum capacitor. The ultra low drop voltage, low quiescent current and low noise make it suitable for low power applications and battery-powered systems. Shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. Typical applications are mobile phones and similar battery-powered wireless systems, portable information appliances.

    Key Features

    • Input voltage from 2.5 V to 6 V
    • Stable with low ESR ceramic capacitors
    • Very low dropout voltage (150 mV typ. at 300 mA load, 0.4 mV typ. at 1 mA load)
    • Very low quiescent current (85 µA typ. at no load, 200 µA typ. at 300 mA load; max.1.5 µA in OFF mode)
    • Guaranteed output current up to 300 mA
    • Wide range of output voltages available on request: fixed from 1.25 V to 5 V with 100 mV step
    • Fast turn-on time: typ. 240 µs
      • [CO = 2.2 µF, CBYP = 33 nF and IO= 1 mA]
    • Logic-controlled electronic shutdown
    • Internal current and thermal limit
    • Low output voltage noise: 30 µ VRMS over 10 Hz to 100 kHz
    • SVR of 55 dB at 1 kHz, 50 dB at 10 kHz
    • Temperature range: - 40 °C to 125 °C
    • Automotive grade product available in DFN6 package, temperature range: - 40 °C to 85 °C

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Part Number
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
Budgetary Price (US$)*
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LDS3985M30R SOT23-5L Tape And Reel 3 3 0.3
Active
0.24 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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LDS3985M25R SOT23-5L Tape And Reel 2.5 3 0.3
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0.24 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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LDS3985PU33RY DFN6 3x3 Tape And Reel 3.3 3 0.3
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0.6 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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LDS3985M28R SOT23-5L Tape And Reel 2.8 3 0.3
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0.24 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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MOUSER WORLDWIDE 100 1 Order Now

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100

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LDS3985M18R SOT23-5L Tape And Reel 1.8 3 0.3
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0.24 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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DIGIKEY WORLDWIDE 15 1 Order Now
AVNET AMERICA 66000 0 Order Now
Farnell Element14 EUROPE 3000 1 Order Now

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DIGIKEY

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15

Min.Order

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Stock

66000

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3000

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LDS3985PU33R DFN6 3x3 Tape And Reel 3.3 3 0.3
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0.401 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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MOUSER WORLDWIDE 89 1 Order Now

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89

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1

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LDS3985M33R SOT23-5L Tape And Reel 3.3 3 0.3
Active
0.24 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985M33R

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DIGIKEY WORLDWIDE 44285 1 Order Now
RS COMPONENTS EUROPE 275 25 Order Now
FUTURE WORLDWIDE 8517 1 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 10111 1 Order Now
Farnell Element14 EUROPE 3430 1 Order Now

Distributor reported inventory date: 2019-09-13

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44285

Min.Order

1

Region

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Stock

275

Min.Order

25

Region

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FUTURE

Stock

8517

Min.Order

1

Region

WORLDWIDE Order Now

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Stock

3000

Min.Order

3000

Region

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Stock

10111

Min.Order

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3430

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Distributor reported inventory date: 2019-09-13

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LDS3985M50R SOT23-5L Tape And Reel 5 3 0.3
Active
0.24 10000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985PU15R DFN6 3x3 Tape And Reel 1.5 3 0.3
Active
0.24 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985PU28R DFN6 3x3 Tape And Reel 2.8 3 0.3
Active
0.401 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
LDS3985M15R SOT23-5L Tape And Reel 1.5 3 0.3
Active
0.24 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office Buy now
LDS3985PU18RY DFN6 3x3 Tape And Reel 1.8 3 0.3
Active
0.6 10000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofLDS3985PU18RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2910 1 Order Now
AVNET AMERICA 6000 0 Order Now
MOUSER WORLDWIDE 5988 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

2910

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5988

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-13

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LDS3985M30R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M30R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13013 1 Order Now
MOUSER WORLDWIDE 11476 1 Order Now
Farnell Element14 EUROPE 4643 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

13013

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

11476

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4643

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M25R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3099 1 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 2790 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

3099

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2790

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU33RY

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.6*

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2719 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

Farnell Element14

Stock

2719

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.6

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M28R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M28R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 100 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

MOUSER

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

2.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M18R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 15 1 Order Now
AVNET AMERICA 66000 0 Order Now
Farnell Element14 EUROPE 3000 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

15

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

66000

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

3000

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU33R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.401*

Distributor availability ofLDS3985PU33R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 89 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

MOUSER

Stock

89

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.401

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M33R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 44285 1 Order Now
RS COMPONENTS EUROPE 275 25 Order Now
FUTURE WORLDWIDE 8517 1 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 10111 1 Order Now
Farnell Element14 EUROPE 3430 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

44285

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

275

Min.Order

25

Region

EUROPE Order Now

FUTURE

Stock

8517

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

10111

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3430

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M50R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU15R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

1.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU28R

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.401*

Output Voltage (V) (nom)

2.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.401

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985M15R

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.24*

Output Voltage (V) (nom)

1.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.24

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

LDS3985PU18RY

Package

DFN6 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.6*

Distributor availability ofLDS3985PU18RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2910 1 Order Now
AVNET AMERICA 6000 0 Order Now
MOUSER WORLDWIDE 5988 1 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

2910

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5988

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-13

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Marketing Status

Active

Unit Price (US$)

0.6

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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**
LDS3985M15R
Active
SOT23-5L Industrial Ecopack2
LDS3985M18R
Active
SOT23-5L Industrial Ecopack2
LDS3985M25R
Active
SOT23-5L Industrial Ecopack2
LDS3985M28R
Active
SOT23-5L Industrial Ecopack2
LDS3985M30R
Active
SOT23-5L Industrial Ecopack2
LDS3985M33R
Active
SOT23-5L Industrial Ecopack2
LDS3985M50R
Active
SOT23-5L Industrial Ecopack2
LDS3985PU15R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU18RY
Active
DFN6 3x3 Automotive Ecopack2
LDS3985PU28R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU33R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU33RY
Active
DFN6 3x3 Automotive Ecopack2

LDS3985M15R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M18R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M25R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M28R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M30R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M33R

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985M50R

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU15R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU18RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LDS3985PU28R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU33R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU33RY

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.