LDO Regulator, 100 mA, Low Power

Overview

The LP2950 and LP2951 are micropower low dropout (LDO) linear voltage regulators that are specifically designed to maintain proper regulation with an extremely low input-to-output voltage differential. These devices feature a very low quiescent bias current of 75 µA and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided.

The LP2951 LDO linear voltage regulator has three additional features. The first is the Errorbar Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor power-on reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 3.0 V output (depending on the version) or programmed from 1.25 V to 29 V. It consists of a pinned out resistor divider along with direct access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turn-off or turn-on the regulator output.

Due to the low input-to-output voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension ofuseful battery life is desirable. The LP2950 is available in the three pin case 29 and DPAK packages, and the LP2951 is available in the eight pin dual-in-line, SO-8 and Micro-8 surface mount packages.

The 'A' suffix devices feature an initial output voltage tolerance +/-0.5%.

  • Automotive
  • Low Quiescent Bias Current of 75 mA
  • Low Input-to-Output Voltage Differential of 50 mV at 100 mA and 380 mV at 100 mA
  • 5.0 V, 3.3 V or 3.0 V +/- 0.5% Allows Use as a Regulator or Reference
  • Extremely Tight Line and Load Regulation
  • Requires Only a 1.0 mF Output Capacitor for Stability
  • Internal Current and Thermal Limiting
  • LP2951 also has Error(bar) Output Signals an Out of Regulation Condition
  • LP2951 also has Output Programmable from 1.25 V to 29 V
  • LP2951 also has Logic Level Shutdown Input
  • Pb-Free Packages are Available

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Orderable Parts:

24

Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Output

Polarity

VO (V)

IO Typ (A)

VI Min (V)

VI Max (V)

VDO Typ (V)

Iq Typ (mA)

PSRR (dB)

Noise (µVrms)

Enable

PowerGood

Application

Pricing ($/Unit)

LP2950CZ-3.0RAG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

REEL

2000

N

Single

Positive

3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2667

More Details

LP2950ACZ-5.0G

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

BLKBG

2000

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2693

More Details

LP2950CZ-5.0G

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

BLKBG

2000

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2761

More Details

LP2950CDT-3.3G

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

TUBE

75

N

Single

Positive

3.3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3236

More Details

LP2950ACDT-3.3RG

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

REEL

2500

N

Single

Positive

3.3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2713

More Details

LP2950ACDT-5.0G

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

TUBE

75

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2925

More Details

LP2950CDT-3.0RKG

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

REEL

2500

N

Single

Positive

3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2863

More Details

LP2950ACZ-3.0RAG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

REEL

2000

N

Single

Positive

3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3513

More Details

LP2950CZ-3.3RAG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

REEL

2000

N

Single

Positive

3.3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3067

More Details

LP2950ACZ-3.3RAG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

REEL

2000

N

Single

Positive

3.3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3859

More Details

LP2950CDT-5.0RKG

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

REEL

2500

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2443

More Details

LP2950ACDT-5RKG

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

REEL

2500

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3013

More Details

LP2950CZ-5.0RAG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

REEL

2000

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3115

More Details

LP2950CZ-5.0RPG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

FNFLD

2000

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3363

More Details

LP2950ACZ-5.0RAG

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

REEL

2000

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2992

More Details

LP2950CZ-3.0G

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

BLKBG

2000

N

Single

Positive

3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3384

More Details

LP2950CZ-3.3G

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

BLKBG

2000

N

Single

Positive

3.3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.3275

More Details

LP2950ACZ-3.0G

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

BLKBG

2000

N

Single

Positive

3

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2667

More Details

LP2950CDT-5.0G

Active

CAD Model

Pb

A

H

P

DPAK-3

1

260

TUBE

75

N

Single

Positive

5

0.1

3.1

30

0.35

0.093

48

56

No

No

Industrial

$0.2345

More Details

LP2950ACZ-3.3G

Active

CAD Model

Pb

A

H

P

TO-92

NA

0

BLKBG

2000

N

Single

Positive

3.3

0.1

3.1

30

0.35

0.093

48

56

No

No