UTC UTCLP2951, UTCLP2950-5.0, UTCLP2950-3.6, UTCLP2950-3.3, UTCLP2950-3.0 Datasheet

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 1

QW-R102-001,E

100 mA LOW-DROPOUT VOLTAGE
REGULATOR

DESCRIPTION

The UTC LP2950/2951 is a monolithic integrated voltage
regulator with low dropout voltage, and low quiescent current.
It includes many features that suitable for different
applications. Available in 3-pin TO-92, DIP-8 and SOP-8
packages.

FEATURES

*High accuracy 2.5, 3.0, 3.3, 3.6 or 5V fixed output for
TO-92, SOP-8 package.
*Extremely low quiescent current and dropout voltage.
*Extremely tight load and line regulation.
*Current and thermal limiting.
*Very low temperature coefficient.
*Logic controlled shutdown and error flag available for DIP
and SOP package.
*Output voltage programmable for DIP and SOP package.

APPLICATIONS

*Battery powered equipment.
*High efficient linear regulator down to 1.24V.
*Cellular phones.

TO-92

SOP-8

DIP-8

1

ORDERING INFORMATION

PART NUMBER TEMPERATURE RANGE PACKAGE ACCURACY

UTC LP2950-5.0

-40 ~ +125°C

3-Pin TO-92 plastic 2.0%

UTC LP2950-3.0

-40 ~ +125°C

3-Pin TO-92 plastic 1.0%

UTC LP2950-3.3

-40 ~ +125°C

3-Pin TO-92 plastic 1.0%

UTC LP2950-3.6

-40 ~ +125°C

3-Pin TO-92 plastic 2.0%

UTC LP2950-2.5

-40 ~ +125°C

3-Pin TO-92 plastic 1.0%

UTC LP2950-5.0

-40 ~ +125°C

8-Pin SOP-8 plastic 2.0%

UTC LP2950-3.0

-40 ~ +125°C

8-Pin SOP-8 plastic 1.0%

UTC LP2950-3.3

-40 ~ +125°C

8-Pin SOP-8 plastic 1.0%

UTC LP2951

-40 ~ +125°C

8-Pin SOP-8 plastic 2.0%

UTC LP2951

-40 ~ +125°C

8-Pin DIP-8 plastic 2.0%

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 2

QW-R102-001,E

PIN CONFIGURATIONS

21 3

OUTPUT

GND

INPUT

UTC LP2950

TO-92 Plastic Package

Bottom View

1

2

3

4

8

7

6

5

INPUT

FEEDBACK

5V TAPSHUTDOW N

SENSE

OUTPUT

UTC

LP2951

GND

ERROR

SOP-8 OR DIP-8 PACKAGE

FOR UTC LP2951

1

2

3

4

8

7

6

5

INPUT

NC

NCSHUTDOWN

NC

OUTPUT

UTC

LP2950

GND

ERROR

SOP-8 OR DIP-8 PACKAGE

FOR UTC LP2950

Fig.1

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 3

QW-R102-001,E

BLOCK DIAGRAM

5

4

6

2

187

3

60mV

330K

Ω

TO CMOS
OR TTL

5V 150mA

MAX.

FEEDBACK INPUT OUTPUT

SENSE

5V TAP

GND

ERROR

DETECTION

COMPARATOR

ERROR

AMPLIFIER

FROM CMOS

OR TTL

1.23
REF

SHUT

DOWN

UNRAGULATED

DC

ERROR

182k

Ω

60k

Ω

1.5 µF

FOR UTC LP2951

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL VALUE UNIT
Supply Voltage Vcc -0.3~+18 V
Feedback Voltage Vfeedback -1.5~+18 V
Shutdown Voltage Vshutdown -0.3~+18 V
Comparator Output Voltage Vco -0.3~+18 V
Storage Temperature Tstr -65~+150

°C

Operating Junction Temperature Tj -40~+125

°C

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 4

QW-R102-001,E

ELECTRICAL CHARACTERISTICS

(Tested at Tj=25°C,V

IN=6V,IL=100µA and CL=1µF, unless otherwise specified)

PARAMETER PART NUMBER TEST CONDITION

MIN. TYP. MAX.

UNIT

Output Voltage UTC LP2950-2.5

UTC LP2950-3.0
UTC LP2950-3.3
UTC LP2950-3.6
UTC LP2950-5.0
UTC LP2951

T

J=25°C

(note 1)

2.47

2.97

3.27

3.53

4.90

2.5

3.0

3.3

3.6

5.0

2.53

3.03

3.33

3.67

5.10

V

UTC LP2950-2.5

UTC LP2950-3.0
UTC LP2950-3.3
UTC LP2950-3.6
UTC LP2950-5.0
UTC LP2951

-25°C<=T

J<=<=+85°C

(note 1)

2.47

2.97

3.27

3.53

4.90

2.5

3.0

3.3

3.6

5.0

2.53

3.03

3.33

3.67

5.10

V

Output Voltage UTC LP2950-2.5

UTC LP2950-3.0
UTC LP2950-3.3
UTC LP2950-3.6
UTC LP2950-5.0
UTC LP2951

100µA<=I

L<=100 mA

Tj<=Tj(max)

(note 1)

2.47

2.97

3.27

3.53

4.90

2.5

3.0

3.3

3.6

5.0

2.53

3.03

3.33

3.67

5.10

V

Output Voltage
Temperature Coefficient

20 100

ppm/°C

Line Regulation 6V<=VIN<=18V 0.03 0.1 0.2 %
Load Regulation

100µA<=I

L<=100 mA

0.04 0.1 0.2 %

Dropout Voltage

I

L=100µA

I

L=100mA (note 2)

50

380

80

450

150

600

mV

Ground Current

I

L=100µA

I

L=100mA

75

8

120

12

140

14

µA

mA

Dropout Ground Current

V

IN=4.5V,IL=100µA

110 170 200

µA
Current Limit Vout=0 160 200 220 mA
Output Noise 10Hz to
100KHz

C

L=1µF

C

L=200µF

C

L=3.3µF

(Bypass=0.01µF
pins 7 to (

utc2951))

430

160
100

µV

For LP2951 8-Pin version only

Reference Voltage 1.22 1.235 1.25 V
Reference Voltage (Note 4) 1.19 1.27 V
Feedback pin Bias
Current

20 40 nA

Reference Voltage
Temperature Coefficient

50

ppm/°C

Feedback Bias Current
temperature Coefficient

0.1

nA/°C

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 5

QW-R102-001,E

PARAMETER PART NUMBER TEST CONDITION

MIN. TYP. MAX.

UNIT

Error Comparator

Output Leakage Current VOH=18V 1

µA
Output Low Voltage VIN=4.5V

I

OL=400µA

250 mV

Upper Threshold
Voltage

(Note 3) 3.2 %VO

Lower Threshold
Voltage

(Note 3) 7.6 %VO

Hysteresis (Note 3) 15 mV

Shutdown Input

Input Logic Voltage

Low(Regulator ON)
High(Regulator OFF)

2.0

1.3

0.70

V

Shutdown Pin Input
Current

Vshutdown=2.4V

30 50

µA

Vshutdown=18V 450 600

µA
Regulator Output

Current Shutdown

Vshutdown>=2V,VIN<=18V,

V

out=0,

Feedback pin tied to 5V Tap.

3 10

µA

Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense
(V

out=5V) and Vshutdown<=0.8V.

Note 2: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.
Note 3:Comparator thresholds are expressed in terms of percentage value of voltage output.
Note 4:Vref≤Vout≤(Vin-1V), 2.3V≤Vin≤30V, 100µA≤I

L

≤100mA, TJ≤T

JMAX

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 6

QW-R102-001,E

APPLICATION CIRCUIT

(10 Ampere Low Dropout Regulator)

+V

IN

FB

Vout

GND

SD

ERROR

UTC LP2951

8

5

7

14

3

CURRENT

LIMIT

SECTION

+V

IN=Vou

t+0.5V

0.05Ω

470

Ω

680

Ω

4.7M

Ω

20k

Ω

220

Ω

0.033µF

47

Ω

R1

R2

4.7

µ

F

100

µ

F

1%

10k

Ω

2N3906

+

V

OUT

100m A

Vout=1.23V*(1+R1/R2)

For 5V output

use internal resistors.Wire pin 6 to 7

and wire pin 2 to +V

out

UTC

D65H0

Fig.2

UTC LP2950-2.5
UTC LP2950-3.0
UTC LP2950-3.3
UTC LP2950-3.6
UTC LP2950-5.0

Vin Vout

Fig.3

UTC LP2950/2951 LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 7

QW-R102-001,E

TYPICAL PERFORMANCE CHARACTERISTICS

1

2

34 560

0

1

2

3

4

5

6

Fig.4 Dropout Characteristics

INPUT VOLTAGE(V)

OUTPUT VOLTAGE(V)

RL=50k

Ω

RL=50

Ω

0 1 2 3 4 5 6 7 8 9 10 11 12

0

10

20

30

40

50

60

70

80

90

100

120
110

130

140

150

Fig.5 Input Current

INPUT CURRENT(mA)

INPUT VOLTAGE(V)

RL=50Ω

50

60

70

80

90

100

110

120

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

Fig. 7 Ground Pin Current

QUIESCENT CURRENT( m A)

TEMPERATURE(°C)?

VIN=6V

I

L

=100µA

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

4

5

6

7

8

TEMPERATURE(°C)?

Fig. 8 Ground Pin Current

QUIESCENT CURRENT(mA)

V IN=6V

I

L

=100mA

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

100

110

120

130

140

150

160

170

TEMPERATURE(°C)?

SHORT CIRCUIT CURRENT(mA)

Fig. 10 Short Circuit Current

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

0

50

100

300

400

500

600

＞

TEMPERATURE(°C)?

DROPOUT VOLTAGE(mV)

Fig. 6 Dropout Voltage

IL=100mA

IL=100µA

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

TEMPERATURE(°C)

0.6

0.8

1.0

1.2

1.4

1.6

1.8

Fig. 9 Shutdown Threshold Voltage

Shutdown Threshold Voltage(V)

0.1 1

10

100

0

100

200

300

400

500

Fig. 11 Dropout Voltage

OUTPUT CURRENT(mA)

Dropout Voltage(mV)