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

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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
NRND
DFN6 3x3 Automotive Ecopack2
LDS3985PU33R
NRND
DFN6 3x3 Industrial Ecopack2
LDS3985PU33RY
NRND
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

NRND

Package

DFN6 3x3

Grade

Automotive

RoHS Compliance Grade

Ecopack2

LDS3985PU33R

Package:

DFN6 3x3

Material Declaration**:

Marketing Status

NRND

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LDS3985PU33RY

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

NRND

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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Part Number
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Package
Packing Type
RoHS
Country of Origin
ECCN (US)
ECCN (EU)
Operating temperature (°C)
Grade
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
min
max
LDS3985M30R
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Distributor availability of LDS3985M30R

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LDS3985M25R
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LDS3985PU33RY
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LDS3985M18R
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LDS3985PU33R
Available at distributors

Distributor availability of LDS3985PU33R

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Distributor reported inventory date:

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LDS3985M33R
Available at distributors

Distributor availability of LDS3985M33R

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LDS3985PU15R
Available at distributors

Distributor availability of LDS3985PU15R

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Distributor reported inventory date:

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LDS3985PU18RY
Available at distributors

Distributor availability of LDS3985PU18RY

Distributor Name
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Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

LDS3985M30R Active

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

Part Number:

LDS3985M30R

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

3

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Distributor Name

Distributor reported inventory date:

LDS3985M25R Active

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

Part Number:

LDS3985M25R

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

2.5

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Distributor Name

Distributor reported inventory date:

LDS3985PU33RY NRND

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

Part Number:

LDS3985PU33RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Distributor Name

Distributor reported inventory date:

LDS3985M18R Active

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

Part Number:

LDS3985M18R

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

1.8

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Distributor Name

Distributor reported inventory date:

LDS3985PU33R NRND

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

Part Number:

LDS3985PU33R

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

LDS3985M33R Active

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

Part Number:

LDS3985M33R

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

3.3

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

Distributor Name

Distributor reported inventory date:

LDS3985PU15R Active

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

Part Number:

LDS3985PU15R

Operating Temperature (°C)

Min:

Max:

Grade:

Industrial

Output Voltage (V) (nom):

1.5

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

LDS3985PU18RY NRND

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

Part Number:

LDS3985PU18RY

Operating Temperature (°C)

Min:

Max:

Grade:

Automotive

Output Voltage (V) (nom):

1.8

Output Tolerance (typ):

3

Output Current (A) (nom):

0.3

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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