LP2950/2951

Micrel

February 1999

3-35

LP2950/2951

100mA Low-Dropout Voltage Regulator

General Description

The LP2950 and LP2951 are micropower voltage regulators
with very low dropout voltage (typically 40mV at light loads
and 380mV at 100mA), and very low quiescent current (75

typical). The quiescent current of the LP2950/LP2951
increases only slightly in dropout, thus prolonging battery life.
This feature, among others, makes the LP2950 and LP2951
ideally suited for use in battery-powered systems.

Available in a 3-Pin TO-92 package, the LP2950 is pin-
compatible with the older 5V regulators. Additional system
functions, such as programmable output voltage and logic-
controlled shutdown, are available in the 8-pin DIP and 8-pin
SOIC versions of the LP2951.

Features

High accuracy 5V, guaranteed 100 mA output

Extremely low quiescent current

Low-dropout voltage

Extremely tight load and line regulation

Very low temperature coefficient

Use as regulator or reference

Needs only 1

F for stability

Current and thermal limiting

LP2951 Versions Only

Error flag warns of output dropout

Logic-controlled electronic shutdown

Output programmable from 1.24 to 29V

Block Diagram and Pin Configurations

LP2950 and LP2951 Block Diagram

(Pin Numbers Refer to LP2951)

OUTPUT

SENSE

SHUTDOWN

GROUND

ERROR

5V TAP

FEEDBACK

INPUT

GROUND

OUTPUT

INPUT

TO-92 Plastic Package Bottom View

(BZ)

DIP and SO Packages

(BN and BM)

Applications

Automotive Electronics

Voltage Reference

Avionics

3 2

See MIC2950 for a part with 1) higher output (150 mA), 2) transient protection (60V), and 3) reverse input protection to 20V)

5V TAP

SENSE

GROUND

ERROR

TO CMOS

OR TTL

330

1.5 µF

182

OUTPUT

INPUT

FEEDBACK

150 mA

MAX.

ERROR

AMPLIFIER

ERROR

DETECTION

COMPARATOR

1.23 V

REF.

60 mV

SHUT-

DOWN

FROM
CMOS

OR TTL

UNREGULATED DC

LP2950/2951

Micrel

3-36

February 1999

Additional features available with the LP2951 also include an
error flag output that warns of a low output voltage, which is
often due to failing batteries on the input. This may also be
used as a power-on reset. A logic-compatible shutdown input
is also available which enables the regulator to be switched on
and off. This part may also be pin-strapped for a 5V output,
or programmed from 1.24V to 29V with the use of two external
resistors.

The LP2950 is available as either an -02 or -03 version. The
-02 and -03 versions are guaranteed for junction temperatures

from 40

C to +125

C; the -02 version has a tighter output and

reference voltage specification range over temperature. The
LP2951 is available as an -02 or -03 version.

The LP2950 and LP2951 have a tight initial tolerance (0.5%
typical), a very low output voltage temperature coefficient
which allows use as a low-power voltage reference, and
extremely good load and line regulation (0.05% typical). This
greatly reduces the error in the overall circuit, and is the result
of careful design techniques and process control.

Absolute Maximum Ratings

If Military/Aerospace specified devices are required, contact your local
Micrel representative/distributor for availability and specifications.

Power dissipation

Internally Limited

Lead Temperature (Soldering, 5 seconds)

260

Storage Temperature Range

C to +150

Operating Junction Temperature Range (Note 8)

LP2950, LP2951

C to +125

Input Supply Voltage

0.3V to +30V

Feedback Input Voltage (Notes 9 and 10)

1.5V to +30V

Shutdown Input Voltage (Note 9)

0.3V to +30V

Error Comparator Output Voltage (Note 9)

0.3V to +30V

ESD Rating is to be determined.

Ordering Information

Part Number

Voltage

Temperature Range*

Package

Accuracy

LP2950-02BZ

5.0V

C to +125

3-Pin TO-92 plastic

0.5%

LP2950-03BZ

5.0V

C to +125

3-Pin TO-92 plastic

1.0%

LP2951-02BM

5.0V

C to +125

8-Pin SOIC

0.5%

LP2951-03BM

5.0V

C to +125

8-Pin SOIC

1.0%

LP2951-02BN

5.0V

C to +125

8-Pin Plastic DIP

0.5%

LP2951-03BN

5.0V

C to +125

8-Pin Plastic DIP

1.0%

LP2951-4.8BM

4.85V

C to +125

8-Pin SOIC

1.0%

* Junction temperatures

LP2950/2951

Micrel

February 1999

3-37

Electrical Characteristics

Note 1 T

= 25

C except as noted.

Parameter

Condition

Min

Typ

Max

Units

Output Voltage

LP295x-02 (

0.5%)

4.975

5.000

5.025

= 25

LP295x-03 (

1%)

4.950

5.000

5.050

LP2951-4.8 (

1%)

4.802

4.850

4.899

Output Voltage

LP295x-02 (

0.5%)

4.950

5.050

+85

LP295x-03 (

1%)

4.925

5.075

LP2951-4.8 (

1%)

4.777

4.872

Output Voltage

LP295x-02 (

0.5%), 40

C to +125

4.940

5.060

Over Full Temperature Range

LP295x-03 (

1%), 40

C to +125

4.900

5.100

LP2951-4.8 (

1%), 40

C to +125

4.753

4.947

Output Voltage

LP295x-02 (

0.5%), 100

100mA, T

J(max)

4.930

5.070

Over Load Variation

LP295x-03 (

1%), 100

100mA, T

J(max)

4.880

5.120

LP2951-4.8 (

1%), 100

100mA, T

J(max)

4.733

4.967

Output Voltage

LP295x-02 (

0.5%), Note 12

100

ppm/

Temperature Coefficient

LP295x-03 (

1%), Note 12

150

ppm/

LP2951-4.8 (

1%), Note 12

150

ppm/

Line Regulation

LP295x-02 (

0.5%), Notes 14, 15

0.03

0.10

0.20

LP295x-03 (

1%), Notes 14, 15

0.04

0.20

0.40

LP2951-4.8 (

1%), Notes 14, 15

0.04

0.20

0.40

Load Regulation

LP295x-02 (

0.5%), Note 14, 100

100mA

0.04

0.10

0.20

LP295x-03 (

1%), Note 14, 100

100mA

0.10

0.20

0.30

LP2951-4.8 (

1%), Note 14, 100

100mA

0.10

0.20

0.30

Dropout Voltage

Note 5, I

= 100

150

Note 5, I

= 100mA

380

450

600

Ground Current

= 100

100

150

200

= 100mA

Dropout Current

= 4.5V, I

= 100

180

250

310

LP2950/2951

Micrel

3-38

February 1999

Parameter

Condition

Min

Typ

Max

Units

Current Limit

OUT

= 0V

160

200

220

Thermal Regulation

Note 13

0.05

0.20

%/W

Output Noise

10Hz to 100kHz, C

= 1

430

RMS

10Hz to 100kHz, C

= 200

160

RMS

10Hz to 100kHz, C

= 3.3

100

RMS

0.01

F bypass Feedback to Output

Reference Voltage

LP295x-02 (

0.5%)

1.220

1.235

1.250

1.200

1.260

LP295x-03 (

1%)

1.210

1.235

1.260

1.200

1.270

LP2951-4.8 (

1%)

1.210

1.235

1.260

1.200

1.270

Reference Voltage

LP295x-02 (

0.5%), Note 7

1.190

1.270

LP295x-03 (

1%), Note 7

1.185

1.285

LP2951-4.8 (

1%), Note 7

1.185

1.285

Feedback Bias Current

Reference Voltage

LP295x-02 (

0.5%), Note 12

ppm/

LP295x-03 (

1%), Note 12

ppm/

LP2951-4.8 (

1%), Note 12

ppm/

Feedback Bias Current

0.1

nA/

Temperature Coefficient

Output Leakage Current

= 30V

0.01

1.00

2.00

Output Low Voltage (Flag)

= 4.5V, I

= 200

150

250

400

Upper Threshold Voltage

Note 6

Lower Threshold Voltage

Note 6

140

Hysteresis

Note 6

Input Logic Voltage

LP295x-02 (

0.5%)

1.3

Low

0.7

High

2.0

LP295x-03 (

1%)

1.3

Low

0.7

High

2.0

LP2951-4.8 (

1%)

1.3

Low

0.7

High

2.0

LP2950/2951

Micrel

February 1999

3-39

Parameter

Condition

Min

Typ

Max

Units

Shutdown Input Current

SHUTDOWN

= 2.4V

100

SHUTDOWN

= 30V

450

600

750

Regulator Output Current

Note 11

in Shutdown

Note 1:

Boldface limits apply at temperature extremes.

Note 2:

Unless otherwise specified all limits guaranteed for T

= 25

C, V

= 6V, I

= 100

A and C

= 1

F. Additional conditions for the 8-pin versions

are Feedback tied to 5V Tap and Output tied to Output Sense (V

OUT

= 5V) and V

SHUTDOWN

0.8V.

Note 3:

Guaranteed and 100% production tested.

Note 4:

Guaranteed but not 100% production tested. These limits are not used to calculate outgoing AQL levels.

Note 5:

Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V
differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken
into account.

Note 6:

Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage
measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V

OUT

REF

(R1 + R2)/R2. For example, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by
95mV x 5V/1.235V = 384mV. Thresholds remain constant as a percent of V

OUT

as V

OUT

is varied, with the dropout warning occurring at

typically 5% below nominal, 7.5% guaranteed.

Note 7:

REF

OUT

1 V), 2.3V

30V, 100

A < I

100mA, T

JMAX

Note 8:

The junction-to-ambient thermal resistance of the TO-92 package is 180

C/W with 0.4" leads and 160

C/W with 0.25" leads to a PC board.

The thermal resistance of the 8-pin DIP package is 105

C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient

thermal resistance for the SOIC (M) package is 160

C/W.

Note 9:

May exceed input supply voltage.

Note 10: When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-

clamped to ground.

Note 11: V

SHUTDOWN

2V, V

30 V, V

OUT

= 0, with Feedback pin tied to 5V Tap.

Note 12: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.

Note 13: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line

regulation effects. Specifications are for a 50mA load pulse at V

= 30V (1.25W pulse) for t = 10ms.

Note 14: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating

effects are covered in the specification for thermal regulation.

Note 15: Line regulation for the LP2951 is tested at 150

C for I

= 1mA. For I

= 100

A and T

= 125

C, line regulation is guaranteed by design to

0.2%. See Typical Performance Characteristics for line regulation versus temperature and load current.

LP2950/2951

Micrel

3-40

February 1999

Typical Performance Characteristics

Quiescent Current

Dropout Characteristics

Ground Current

Output Voltage vs.
Temperature of 3
Representative Units

Input Current

Ground Current

Quiescent Current

Drop-out Voltage

Short Circuit Current

Drop-out Voltage

0.1

150

0.1

0.01

120
110
100

90
80
70
60
50
40
30
20
10

6 7

9 10

5.06

5.04

5.02

5.0

4.98

4.96

4.94

-75 -50 -25 0 25 50 75 100 125 150

120

160

200

240

280

320

240

220

200

180

-75 -50 -25 0 25 50 75 100 125 150

170

160

150

140

130

120

110

100

-75 -50 -25 0 25 50 75 100 125 150

600

500

400

300

100

-75 -50 -25 0 25 50 75 100 125 150

500

400

300

200

100

100 µA

1 mA

10 mA

100 mA

R = 50k

R = 50

0.2%

I = 1 mA

I = 0

V = 6V
I = 100 µA

V = 6V
I = 100 mA

I = 100 mA

I = 100 µA

T = 25 °C

LOAD CURRENT (mA)

INPUT VOLTAGE (VOLTS)

TEMPERATURE (°C)

INPUT VOLTAGE (VOLTS)

TEMPERATURE (°C)

INPUT VOLTAGE (V)

TEMPERATURE (°C)

OUTPUT CURRENT

GROUND PIN CURRENT (mA)

OUTPUT VOLTAGE (VOLTS)

INPUT CURRENT (mA)

OUTPUT VOLTAGE (V)

GROUND CURRENT (µA)

QUIESCENT CURRENT (µA)

GROUND CURRENT (mA)

SHORT CIRCUIT CURRENT (mA)

DROP-OUT VOLTAGE (mV)

130

140

150

160

Input Current

100

125

150

175

200

225

250

1 2

3 4

5 6

7 8 9 10

R = 50k

R =

INPUT VOLTAGE (VOLTS)

INPUT CURRENT (µA)

R = 50

LP2950/2951

Micrel

February 1999

3-41

LP2951
Error Comparator Output

LP2951
Minimum Operating Voltage

Line Transient Response

Load Transient Response

Ripple Rejection

Output Impedance

2.2

2.0

1.9

1.6

-30

-20

-10

-250

-200

-150

-100

-50

-2.0 -1.5 -1.0 -0.5

0.5

1.0

-2

2.5

2.0

1.5

1.0

0.5

0.0

100

200

400

600

800

250
200
150
100

-50

-100

7
6

2
1

-100 0 100 200 300 400 500 600 700

0.5

0.2
0.1

0.05

100

10K 100K

T = 125

C = 1

V = 5V

OUT

I = 10 mA
V = 8V
V = 5V

I = 0

I = 100

TEMPERATURE (

FEEDBACK VOLTAGE (V)

TIME (

OUTPUT LOW VOLTAGE (V)

INPUT VOLTAGE (V)

TIME (ms)

FREQUENCY (Hz)

MINIMUM OPERATING VOLTAGE (V)

BIAS CURRENT (nA)

FEEDBACK CURRENT (

COMPARATOR OUTPUT (V)

SINK CURRENT (mA)

OUTPUT VOLTAGE

CHANGE (mV)

OUTPUT IMPEDANCE (OHMS)

RIPPLE REJECTION (dB)

LP2951
Feedback Bias Current

LP2951
Feedback Pin Current

LP2951
Comparator Sink Current

LP2951
Enable Transient

Ripple Rejection

2.1

1.8

1.7

-75 -50 -25 0 25 50 75 100 125 150

TEMPERATURE (

PIN 7 DRIVEN BY EXTERNAL
SOURCE (REGULATOR RUN
OPEN LOOP)

T = 25

V = 5V

OUT

T = 125

T = 25

T = -55

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

-50

100

LOAD

CURRENT

C = 1

I = 1 mA
V = 5V

OUT

60
40
20

-20
-40
-60

100

OUTPUT VOLTAGE

CHANGE (mV)

LOAD

CURRENT

C = 10

V = 5V

OUT

OUTPUT VOLTAGE

CHANGE

INPUT

VOLTAGE

OUTPUT

VOLTAGE (V)

SHUTDOWN

PIN VOLTAGE (V)

-2

C = 10

OUT

0.02

0.01

I = 100

I = 1 mA

I = 100 mA

V = 5V
C = 1

OUT

C = 1

V = 6V
V = 5V

OUT

C = 1

V = 6V
V = 5V

OUT

I = 10 mA

I = 1 mA

HYSTERESIS

PULLUP RESISTOR TO
SEPARATE 5V SUPPLY

FREQUENCY (Hz)

T = 55

TIME (

L = 1

LP2950/2951

Micrel

3-42

February 1999

Typical Performance Characteristics

(Continued)

Ripple Rejection

Shutdown Threshold Voltage

0.6

0.8

1.0

1.2

1.4

1.6

1.8

-75 -50 -25 0 25 50 75 100 125 150

FREQUENCY (Hz)

TEMPERATURE (°C)

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

30
25
20

-10

400

300

200

100

120

100

120

100

-2

-1

LP2950 Maximum
Rated Output

-75 -50 -25 0 25 50 75 100 125 150

Output Noise

LP2951 Divider Resistance

Line Regulation

LP2950 Maximum
Rated Output Current

15
10

-5

Thermal Response

FREQUENCY (Hz)

TEMPERATURE (°C)

RIPPLE REJECTION (dB)

VOLTAGE NOISE

SPECTRAL DENSITY (µV/ Hz)

PIN 2 TO PIN 4 RESISTANCE (k )

SHUTDOWN THRESHOLD VOLTAGE (V)

INPUT VOLTAGE (V)

OUTPUT VOLTAGE CHANGE (mV)

OUTPUT CURRENT (mA)

POWER

DISSIPATION (W)

OUTPUT VOLTAGE

CHANGE (mV)

1.25W

I = 50 µA

C = 1 µF
V = 6V
V = 5V

OUT

0.01 µF
BYPASS
PIN 1 TO
PIN 7

C = 220 µF

I = 100 mA

C = 1 µF

C =
3.3 µF

I = 100 µA

I = 1 mA

I = 100 µA

T = 150°C

T = 125°C

MAX

V = 5V

OUT

T = 25°C

T = 50°C

T = 85°C

8-PIN MOLDED
DIP SOLDERED
TO PC BOARD

T = 125°C

MAX

T = 25°C

T = 85°C

TO-92 PACKAGE

0.25" LEADS SOLDERED

TO PC BOARD

I = 100 mA

TIME (µs)

INPUT VOLTAGE (V)

LP2950/2951

Micrel

February 1999

3-43

which V

OUT

= 4.75V). Since the LP2951's dropout voltage is

load-dependent (see curve in Typical Performance
Characteristics), the input voltage trip point (about 5V) will
vary with the load current. The output voltage trip point
(approximately 4.75V) does not vary with load.

The error comparator has an open-collector output which
requires an external pull-up resistor. Depending on system
requirements, this resistor may be returned to the 5V output
or some other supply voltage. In determining a value for this
resistor, note that while the output is rated to sink 400

A, this

sink current adds to battery drain in a low battery condition.
Suggested values range from 100k to 1M

. The resistor is not

required if this output is unused.

Programming the Output Voltage (LP2951)

The LP2951 may be pin-strapped for 5V using its internal
voltage divider by tying Pin 1 (output) to Pin 2 (SENSE) and
Pin 7 (FEEDBACK) to Pin 6 (5V TAP). Alternatively, it may be
programmed for any output voltage between its 1.235V
reference and its 30V maximum rating. An external pair of
resistors is required, as shown in Figure 2.

The complete equation for the output voltage is

OUT

= V

REF

x { 1 + R

} + I

where V

REF

is the nominal 1.235 reference voltage and I

the feedback pin bias current, nominally 20 nA. The minimum
recommended load current of 1

A forces an upper limit of 1.2

on the value of R

, if the regulator must work with no load

(a condition often found in CMOS in standby), I

will produce

a 2% typical error in V

OUT

which may be eliminated at room

temperature by trimming R

. For better accuracy, choosing

= 100k

reduces this error to 0.17% while increasing the

resistor program current to 12

A. Since the LP2951 typically

draws 60

A at no load with Pin 2 open-circuited, this is a small

price to pay.

Reducing Output Noise

In reference applications it may be advantageous to reduce
the AC noise present at the output. One method is to reduce
the regulator bandwidth by increasing the size of the output
capacitor. This is the only method by which noise can be
reduced on the 3 lead LP2950 and is relatively inefficient, as
increasing the capacitor from 1

F to 220

F only decreases

the noise from 430

V to 160

V rms for a 100kHz bandwidth

at 5V output.

Noise can be reduced fourfold by a bypass capacitor across
R

, since it reduces the high frequency gain from 4 to unity.

Pick

or about 0.01

F. When doing this, the output capacitor must

be increased to 3.3

F to maintain stability. These changes

reduce the output noise from 430

V to 100

V rms for a

100kHz bandwidth at 5V output. With the bypass capacitor
added, noise no longer scales with output voltage so that
improvements are more dramatic at higher output voltages.

Applications Information

External Capacitors

A 1.0

F (or greater) capacitor is required between the LP2950/

LP2951 output and ground to prevent oscillations due to
instability. Most types of tantalum or aluminum electrolytics
will be adequate; film types will work, but are costly and
therefore not recommended. Many aluminum electrolytics
have electrolytes that freeze at about 30

C, so solid tantalum

capacitors are recommended for operation below 25

C. The

important parameters of the capacitor are an effective series
resistance of about 5

or less and a resonant frequency

above 500kHz. The value of this capacitor may be increased
without limit.

At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to
0.33

F for current below 10mA or 0.1

F for currents below

1mA. Using the 8-Pin versions at voltages below 5V runs the
error amplifier at lower gains so that more output capacitance
is needed. For the worst-case situation of a 100mA load at
1.23V output (Output shorted to Feedback) a 3.3

(or greater) capacitor should be used.

The LP2950 will remain stable and in regulation with no load
in addition to the internal voltage divider, unlike many other
voltage regulators. This is especially important in CMOS
RAM keep-alive applications. When setting the output voltage
of the LP2951 version with external resistors, a minimum load
of 1

A is recommended.

A 0.1

F capacitor should be placed from the LP2950/LP2951

input to ground if there is more than 10 inches of wire between
the input and the AC filter capacitor or if a battery is used as
the input.

Stray capacitance to the LP2951 Feedback terminal (pin 7)
can cause instability. This may especially be a problem when
using high value external resistors to set the output voltage.
Adding a 100pF capacitor between Output and Feedback and
increasing the output capacitor to at least 3.3

F will remedy

this.

Error Detection Comparator Output

A logic low output will be produced by the comparator whenever
the LP2951 output falls out of regulation by more than
approximately 5%. This figure is the comparator's built-in
offset of about 60mV divided by the 1.235V reference voltage.
(Refer to the block diagram on Page 1). This trip level remains
"5% below normal" regardless of the programmed output
voltage of the LP2951. For example, the error flag trip level
is typically 4.75V for a 5V output or 11.4V for a 12V output.
The out of regulation condition may be due either to low input
voltage, current limiting, or thermal limiting.

Figure 1 is a timing diagram depicting the ERROR signal and
the regulated output voltage as the LP2951 input is ramped up
and down. The ERROR signal becomes valid (low) at about
1.3V input. It goes high at about 5V input (the input voltage at

BYPASS

2 R

· 200 Hz

LP2950/2951

Micrel

February 1999

3-45

Low Drift Current Source

5 Volt Current Limiter

LP2951

GND

VIN

OUT

SHUTDOWN

INPUT

LOAD

+V = 2

30V

IL=

1.23

0.1

* MINIMUM INPUT-OUTPUT VOLTAGE RANGES FROM 40mV TO 400mV,
DEPENDING ON LOAD CURRENT.

LP2950Z

OUT

GND

+V IN

= 5V

OUT

Regulator with Early Warning and Auxiliary Output

· EARLY WARNING FLAG ON LOW INPUT VOLTAGE
· MAIN OUTPUT LATCHES OFF AT LOWER INPUT VOLTAGES
· BATTERY BACKUP ON AUXILIARY OUTPUT

OPERATION: REG. #1'S V

OUT

IS PROGRAMMED ONE DIODE DROP ABOVE 5 V.

ITS ERROR FLAG BECOMES ACTIVE WHEN V

5.7 V. WHEN V

DROPS

BELOW 5.3 V, THE ERROR FLAG OF REG. #2 BECOMES ACTIVE AND VIA Q1
LATCHES THE MAIN OUTPUT OFF. WHEN V

AGAIN EXCEEDS 5.7 V REG. #1

IS BACK IN REGULATION AND THE EARLY WARNING SIGNAL RISES,
UNLATCHING REG. #2 VIA D3.

LP2951

SENSE

ERROR

GND

27k

OUT

+VIN

LP2951

SENSE

ERROR

GND

OUT

+VIN

MEMORY

V+

D 2

D 1

2.7M

D 3

D 4

330k

RESET

EARLY WARNING

VDO

MAIN

OUTPUT

+VIN

3.6V
NICAD

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LP2951-4.8B

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LP2951-4.8B