LDS3985

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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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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

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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 10611 1 Order Now
MOUSER WORLDWIDE 4106 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

10611

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4106

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3 0.24 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.24

Country of Origin:

MALAYSIA

LDS3985M25R Available at 3 distributors

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 183 1 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 131 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

183

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

131

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

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Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 2.5 0.24 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.24

Country of Origin:

MALAYSIA

LDS3985PU33RY Available at 1 distributors

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2017 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

Farnell Element14

Stock

2017

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 3.3 0.6 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.6

Country of Origin:

MALAYSIA

LDS3985M18R Available at 3 distributors

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 164 1 Order Now
MOUSER WORLDWIDE 6000 1 Order Now
Farnell Element14 EUROPE 2895 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

164

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

6000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2895

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 1.8 0.24 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.24

Country of Origin:

MALAYSIA

LDS3985PU33R Available at 1 distributors

Distributor availability ofLDS3985PU33R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 7 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

MOUSER

Stock

7

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 3.3 0.401 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.401

Country of Origin:

MALAYSIA

LDS3985M33R Available at 7 distributors

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 23858 1 Order Now
COMPEL EUROPE 168 1 Order Now
RS COMPONENTS EUROPE 275 1 Order Now
FUTURE WORLDWIDE 1367 1 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 8756 1 Order Now
Farnell Element14 EUROPE 1139 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

23858

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

168

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

275

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1367

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

8756

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1139

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 3.3 0.24 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.24

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 0.401 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.401

Country of Origin:

MALAYSIA

LDS3985PU18RY Available at 1 distributors

Distributor availability ofLDS3985PU18RY

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 6000 0 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -40 125 1.8 0.6 / 1k
MORE INFO

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Unit Price (US$):

0.6

Country of Origin:

MALAYSIA

LDS3985M30R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.24 / 1k

Distributor availability ofLDS3985M30R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10611 1 Order Now
MOUSER WORLDWIDE 4106 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

10611

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4106

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

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

0.24 / 1k

Country of Origin

MALAYSIA

LDS3985M25R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.24 / 1k

Distributor availability ofLDS3985M25R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 183 1 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 131 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

183

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

131

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

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

0.24 / 1k

Country of Origin

MALAYSIA

LDS3985PU33RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6 / 1k

Distributor availability ofLDS3985PU33RY

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2017 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

Farnell Element14

Stock

2017

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

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

0.6 / 1k

Country of Origin

MALAYSIA

LDS3985M18R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.24 / 1k

Distributor availability ofLDS3985M18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 164 1 Order Now
MOUSER WORLDWIDE 6000 1 Order Now
Farnell Element14 EUROPE 2895 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

164

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

6000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2895

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

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

0.24 / 1k

Country of Origin

MALAYSIA

LDS3985PU33R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.401 / 1k

Distributor availability ofLDS3985PU33R

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 7 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

MOUSER

Stock

7

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

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

0.401 / 1k

Country of Origin

MALAYSIA

LDS3985M33R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.24 / 1k

Distributor availability ofLDS3985M33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 23858 1 Order Now
COMPEL EUROPE 168 1 Order Now
RS COMPONENTS EUROPE 275 1 Order Now
FUTURE WORLDWIDE 1367 1 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 8756 1 Order Now
Farnell Element14 EUROPE 1139 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

23858

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

168

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

275

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1367

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

8756

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1139

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

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

0.24 / 1k

Country of Origin

CHINA

LDS3985PU15R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.401 / 1k

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

0.401 / 1k

Country of Origin

MALAYSIA

LDS3985PU18RY

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6 / 1k

Distributor availability ofLDS3985PU18RY

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 6000 0 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

AVNET

Stock

6000

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-01-20

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

0.6 / 1k

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