LDS3985

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Design Win

Very low drop and low noise BiCMOS 300 mA voltage regulator

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Product overview

Description

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.
  • All 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

EDA Symbols, Footprints and 3D Models

STMicroelectronics - LDS3985

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Symbols

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Footprints

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3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LDS3985M18R
Active
SOT23-5L Industrial Ecopack2
LDS3985M25R
Active
SOT23-5L Industrial Ecopack2
LDS3985M30R
Active
SOT23-5L Industrial Ecopack2
LDS3985M33R
Active
SOT23-5L Industrial Ecopack2
LDS3985PU15R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU18RY
Active
DFN6 3x3 Automotive Ecopack2
LDS3985PU33R
Active
DFN6 3x3 Industrial Ecopack2
LDS3985PU33RY
Active
DFN6 3x3 Automotive 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

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

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

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Output Voltage (V) (nom)
Budgetary Price (US$)*/Qty
More info
min
max
LDS3985M30R Available at 2 distributors

Distributor availability ofLDS3985M30R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6881 1 Buy from Distributor
Farnell Element14 EUROPE 2898 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

DIGIKEY

Stock

6881

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2898

Min.Order

1

Distributor reported inventory date: 2022-05-26

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3487

Country of Origin:

MALAYSIA

LDS3985M25R Available at 1 distributors

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2634 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

MOUSER

Stock

2634

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 2.5
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3487

Country of Origin:

MALAYSIA

LDS3985PU33RY Available at 2 distributors

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3 1 Buy from Distributor
MOUSER WORLDWIDE 1280 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

DIGIKEY

Stock

3

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

1280

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 3.3
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3944

Country of Origin:

MALAYSIA

LDS3985M18R Available at 2 distributors

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 27000 0 Buy from Distributor
Farnell Element14 EUROPE 1301 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

AVNET

Stock

27000

Min.Order

0

Region

AMERICA Buy from Distributor

Farnell Element14

Stock

1301

Min.Order

1

Distributor reported inventory date: 2022-05-26

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 1.8
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3487

Country of Origin:

MALAYSIA

LDS3985PU33R Available at 1 distributors

Distributor availability ofLDS3985PU33R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 5 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

MOUSER

Stock

5

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 3.3
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3487

Country of Origin:

MALAYSIA

LDS3985M33R Available at 3 distributors

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 21000 0 Buy from Distributor
FUTURE WORLDWIDE 217 1 Buy from Distributor
MOUSER WORLDWIDE 2549 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

AVNET

Stock

21000

Min.Order

0

Region

AMERICA Buy from Distributor

FUTURE

Stock

217

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

2549

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3.3
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3652

Country of Origin:

CHINA

LDS3985PU15R No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 1.5
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3487

Country of Origin:

MALAYSIA

LDS3985PU18RY No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 1.8
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.3766

Country of Origin:

MALAYSIA

LDS3985M30R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLDS3985M30R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6881 1 Buy from Distributor
Farnell Element14 EUROPE 2898 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

DIGIKEY

Stock

6881

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2898

Min.Order

1

Distributor reported inventory date: 2022-05-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

LDS3985M25R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2634 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

MOUSER

Stock

2634

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

2.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

LDS3985PU33RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3 1 Buy from Distributor
MOUSER WORLDWIDE 1280 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

DIGIKEY

Stock

3

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

1280

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

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)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

LDS3985M18R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 27000 0 Buy from Distributor
Farnell Element14 EUROPE 1301 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

AVNET

Stock

27000

Min.Order

0

Region

AMERICA Buy from Distributor

Farnell Element14

Stock

1301

Min.Order

1

Distributor reported inventory date: 2022-05-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.8

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

LDS3985PU33R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLDS3985PU33R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 5 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

MOUSER

Stock

5

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

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)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

LDS3985M33R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 21000 0 Buy from Distributor
FUTURE WORLDWIDE 217 1 Buy from Distributor
MOUSER WORLDWIDE 2549 1 Buy from Distributor

Distributor reported inventory date: 2022-05-26

Distributor Name

AVNET

Stock

21000

Min.Order

0

Region

AMERICA Buy from Distributor

FUTURE

Stock

217

Min.Order

1

Region

WORLDWIDE Buy from Distributor

MOUSER

Stock

2549

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

3.3

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

LDS3985PU15R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-40

(max)

125

Output Voltage (V) (nom)

1.5

Output Tolerance (typ)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

LDS3985PU18RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

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)

3

Output Current (A) (nom)

0.3

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

(*) 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