Datasheet LD2981CM30TR, LD2981CM50TR, LD2981CM48TR, LD2981CM38TR, LD2981CM33TR Datasheet (SGS Thomson Microelectronics)

LD2981



VOLTAGE REGULATORS WITH INHIBIT

■ ULTRALOWDROPOUTVOLTAGE

(0.2VAT100mALOAD,7mVAT1mA LOAD)

■ VERYLOWQUIESCENTCURRENT

(MAX1µA WHENISIN SHUTDOWNMODE)

■ OUTPUT CURRENT UP TO100mA

■ LOGIC-CONTROLLEDELECTRONIC

SHUTDOWN

■ OUTPUT VOLTAGESOF 2.85;3.0;3.2;3.3;

3.8;4.85; 5.0V

■ INTERNALCURRENT AND THERMALLIMIT

■ AVAILABLEIN± 0.75%TOLLERANCE(AT

o

25

C, A VERSION)

■ OUTPUT LOWNOISEVOLTAGE160µVrms

■ ONLY4.7µF FOR STABILITY

■ TEMPERATURERANGE:-40 TO 125

■ SMALLESTPACKAGESOT23-5LAND

SOT-89

■ FASTDYNAMICRESPONCETO LINEAND

LOADCHANGES

DESCRIPTION

The LD2981 series are 100mA fixed-output
voltage regulator. The ultra drop-voltage and the
ultralow quiescentcurrent make them particularly
suitablefor low noise, lowpower applications and
in battery poweredsystems.

o

C

SERIES

VERY LOW DROP

SOT23-5L SOT-89

In sleep mode quiescent current is less than 1µA
when INHIBIT pis is pulled low. Shutdown Logic
Control function is available on pin n.3 (TTL
compatible). This means that when the device is
used aslocal regulator,it ispossible to put a part
of the board in standby, decreasing the total
power consumption. Typlical application are in
cellular phone, palmtop/laptop computer,
personal digital assistant (PDA), personalstereo,
camcorderand camera.

SCHEMATIC DIAGRAM

April 2000

1/12

LD2981

ABSOLUTE MAXIMUM RATING

Symbol Parameter Value Unit

V

DC InputVoltage 16 V

IN

V

THERMALDATA

Symbol Parameter SOT-89 SOT23-5L Unit

R

thj-cas e

INHBITInput Voltage 16 V

INH

OutputCurrent Internally limited mA

I

o

P

PowerDissipation Internally limited mW

tot

StorageTemperature Range - 55 to 150

T

stg

OperatingJunctionTemperatureRange - 40 to 125

T

op

Thermal ResistanceJunction-case 15 81

o

o

C

o

C

C/W

CONNECTION DIAGRAM

(*) Inhibitpin is not internallypulled-up then it must notbe left floating.Disable the device whenconnected to GND or to a positive voltage
less than 0.18V

(topview)

SOT23-5L

SOT-89

ORDERING NUMBERS

AB VERSION C VERSION Output Voltage

SOT23-5L SOT-89 SOT23-5L SOT-89

LD2981ABM28TR
LD2981ABM30TR
LD2981ABM32TR
LD2981ABM33TR
LD2981ABM38TR
LD2981ABM48TR
LD2981ABM50TR

LD2981ABU28TR
LD2981ABU30TR
LD2981ABU32TR
LD2981ABU33TR
LD2981ABU38TR
LD2981ABU48TR
LD2981ABU50TR

LD2981CM28TR
LD2981CM30TR
LD2981CM32TR
LD2981CM33TR
LD2981CM38TR
LD2981CM48TR
LD2981CM50TR

LD2981CU28TR
LD2981CU30TR
LD2981CU32TR
LD2981CU33TR
LD2981CU38TR
LD2981CU48TR
LD2981CU50TR

2.85 V

3.0 V

3.2 V

3.3 V

3.8 V

4.85 V

5.0 V

APPLICATION CIRCUIT

2/12

LD2981

ELECTRICALCHARACTERISTICS FOR LD2981AB

V

IN=VO(NOM)

+1, CO=1µF, IO= 1mA, V

= 2V, unless otherwise specified)

INH

(refer to the test circuits,T

=25oC,

J

Symbol Parameter Test Conditions Min. Typ. Max. Unit

OutputVoltage VIN=3.85 V

V

o

OutputVoltage VIN=4V

V

o

OutputVoltage VIN=4.2 V

V

o

OutputVoltage VIN=4.3 V

V

o

OutputVoltage VIN=4.8 V

V

o

OutputVoltage VIN=5.85 V

V

o

OutputVoltage VIN=6V

V

o

OutputCurrentLimit 150 mA

I

out

V

∆

LineRegulation V

o

I

QuiescentCurrent ON MODE

d

<100 mA

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

1<I

<100 mA,

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA,

1<I

o

1<I

<100 mA, -40< TJ< 125oC

o

<100 mA,

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA,

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

+1< VIN<16V, Io=1mA

O(NOM)

-40 < T

I
I
I
I
I
I
I
I

< 125oC

J

=0mA

o

=0 mA -40 <TJ< 125oC

o

=1mA

o

=1 mA -40 <TJ< 125oC

o

=25mA

o

=25 mA -40< TJ<125oC

o

=100 mA

o

=100 mA -40< TJ<125oC

o

2.828

2.822

2.779

2.977

2.970

2.925

3.176

3.168

3.12

3.275

3.267

3.217

3.771

3.762

3.705

4.813

4.801

4.729

4.962

4.950

4.875

2.85 2.872

2.878

2.921

33.023

3.030

3.075

3.2 3. 224

3.232

3.28

3.3 3. 325

3.333

3.383

3.8 3. 829

3.838

3.895

4.85 4.887

4.899

4.971

55.038

5.050

5.125

0.003 0.014

0.032

80

100
150

100

150
200

250

400
800

800

1300
2600

%/V

OFF MODE

<0.3 V

V

INH

<0.15 V -40 < TJ< 125oC

V

INH

SVR Supply Voltage Rejection f = 1KHz, C

DropoutVoltage Io=0mA

V

d

ControlInput LogicLow LOW = OutputOFF -40< TJ<125oC0.18V

V

il

ControlInput LogicHigh HIGH = Output ON -40< TJ<125oC2 V

V

ih

ControlInput Current V

I

i

=0 mA -40 <TJ< 125oC

I

o

=1mA

I

o

=1 mA -40 <TJ< 125oC

I

o

=25mA

I

o

=25 mA -40< TJ<125oC

I

o

=100 mA

I

o

=100 mA -40< TJ<125oC

I

o

=0 V , -40< TJ<125oC

INH

=5 V, -40< TJ<125oC

V

INH

=10µF63dB

out

eN OutputNoise Voltage(RMS) BW = 300Hz to50 KHz, C

ShortCircuitCurrent RL=0 150 mA

I

SC

1
7

70

200

0
5

=10µF160 µV

out

0.8
2

3
5

10

15
100
150
250
375

-1

15

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

µA
µ
µA
µ
µA
µ
µA
µ

µ
µA

mV
mV
mV
mV
mV
mV
mV
mV

µA
µ

in

A

A
A
A

A

A

3/12

LD2981

ELECTRICALCHARACTERISTICS FOR LD2981C

V

IN=VO(NOM)

+1, CO=1µF, IO= 1mA, V

= 2V, unless otherwise specified)

INH

(refer to the test circuits,T

=25oC,

J

Symbol Parameter Test Conditions Min. Typ. Max. Unit

OutputVoltage VIN=3.85 V

V

o

OutputVoltage VIN=4V

V

o

OutputVoltage VIN=4.2 V

V

o

OutputVoltage VIN=4.3 V

V

o

OutputVoltage VIN=4.8 V

V

o

OutputVoltage VIN=5.85 V

V

o

OutputVoltage VIN=6V

V

o

OutputCurrentLimit 150 mA

I

out

V

∆

LineRegulation V

o

I

QuiescentCurrent ON MODE

d

<100 mA

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

1<I

<100 mA,

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA,

1<I

o

1<I

<100 mA, -40< TJ< 125oC

o

<100 mA,

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

<100 mA,

1<I

o

<100 mA, -40< TJ< 125oC

1<I

o

+1< VIN<16V, Io=1mA

O(NOM)

-40 < T

I
I
I
I
I
I
I
I

< 125oC

J

=0mA

o

=0 mA -40 <TJ< 125oC

o

=1mA

o

=1 mA -40 <TJ< 125oC

o

=25mA

o

=25 mA -40< TJ<125oC

o

=100 mA

o

=100 mA -40< TJ<125oC

o

2.814

2.793

2.750

2.962

2.940

2.895

3.160

3.136

3.088

3.259

3.234

3.184

3.752

3.724

3.667

4.789

4.753

4.680

4.937

4.900

4.825

2.85 2.886

2.907

2.950

33.038

3.060

3.105

3.2 3. 240

3.264

3.312

3.3 3. 341

3.366

3.416

3.8 3. 848

3.876

3.933

4.85 4.911

4.947

5.020

55.063

5.100

5.175

0.003 0.014

0.032

80

100
150

100

150
200

250

400
800

800

1300
2600

%/V

OFF MODE

<0.3 V

V

INH

<0.15 V -40 < TJ< 125oC

V

INH

SVR Supply Voltage Rejection f = 1KHz, C

DropoutVoltage Io=0mA

V

d

ControlInput LogicLow LOW = OutputOFF -40< TJ<125oC0.18V

V

il

ControlInput LogicHigh HIGH = Output ON -40< TJ<125oC2 V

V

ih

ControlInput Current V

I

i

=0 mA -40 <TJ< 125oC

I

o

=1mA

I

o

=1 mA -40 <TJ< 125oC

I

o

=25mA

I

o

=25 mA -40< TJ<125oC

I

o

=100 mA

I

o

=100 mA -40< TJ<125oC

I

o

=0 V , -40< TJ<125oC

INH

=5 V, -40< TJ<125oC

V

INH

=10µF63dB

out

eN OutputNoise Voltage(RMS) BW = 300Hz to50 KHz, C

ShortCircuitCurrent RL=0 150 mA

I

SC

1
7

70

200

0
5

=10µF160 µV

out

0.8
2

3
5

10

15
100
150
250
375

-1

15

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

µA
µ
µA
µ
µA
µ
µA
µ

µ
µA

mV
mV
mV
mV
mV
mV
mV
mV

µA
µ

in

A

A
A
A

A

A

4/12

LD2981

TYPICALPERFORMANCE CHARACTERISTICS

OutputVoltage vs Temperature

OutputVoltage vs Input Voltage

(unless otherwise specified T

OutputVoltage vs Temperature

OutputVoltage vs InputVoltage

=25oC, CIN=C

J

OUT

=1µF)

OutputVoltage vs Output Current

OutputVoltage vs OutputCurrent

5/12

LD2981

TYPICALPERFORMANCE CHARACTERISTICS

Line Regulationvs Temperature

DropoutVoltagevs OutputCurrent

(continued)

Dropout Voltagevs Temperature

QuiescentCurrent vs Temperature

QuiescentCurrent vs Output Current

6/12

QuiescentCurrent vs Input Voltage

LD2981

TYPICALPERFORMANCE CHARACTERISTICS

S.V.R.vs Frequency

S.V.R.vs Output Current

(continued)

S.V.R.vs Temperature

Stability

Short Circuit Current vs Droput Voltage

ReverseCurrentvs ReverseVoltage

7/12

LD2981

TYPICALPERFORMANCE CHARACTERISTICS

OutputVoltage vs Inhibit Voltage

SupplyVoltage Rejectionat V

=2.85V SupplyVoltage Rejectionat V

OUT

(continued)

InhibitCurrent vs Temperature

OUT

=5V

VIN= 7.35±2.5V, I

=0.1A, f = 1KHz VIN=9±2.5V,I

OUT

Line TransientResponse

VIN= 4.75 to 5.25V,I

8/12

= 0.1A,CO=10µF (ESR=1Ω at 1KHz) VIN= 4.75 to 5.25V,I

OUT

= 0.1A, f = 1KHz

OUT

Line TransientResponse

= 0.1A,CO=10µF (ESR=1Ω at 1KHz)

OUT

LD2981

TYPICALPERFORMANCE CHARACTERISTICS

LoadTransient Response

VCC= 5V, I
(ESR=1Ω at 1KHz)

= 1 to 100mA,CIN= 150nF C

OUT

OUT

=10µF

ShutdownTransient Response

(continued)

LoadTransient Response

= 5V, I

V

CC

(ESR=1Ω at 1KHz)

= 1 to100mA,CIN= 150nF C

OUT

OUT

=10µF

V

=5V, VIN= 6V, V

OUT

=0to5V,CIN=C

INH

=1µF (Tant.)

OUT

9/12

LD2981

SOT-89 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.4 1.6 55.1 63.0
B 0.44 0.56 17.3 22.0

B1 0.36 0.48 14.2 18.9

C 0.35 0.44 13.8 17.3

C1 0.35 0.44 13.8 17.3

D 4.4 4.6 173.2 181.1

D1 1.62 1.83 63.8 72.0

E 2.29 2.6 90.2 102.4
e 1.42 1.57 55.9 61.8

e1 2.92 3.07 115.0 120.9

H 3.94 4.25 155.1 167.3
L 0.89 1.2 35.0 47.2

mm mils

10/12

P025H

SOT23-5L MECHANICAL DATA

LD2981

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 0.90 1.45 35.4 57.1
A1 0.00 0.15 0.0 5.9

A2 0.90 1.30 35.4 51.2

b 0.35 0.50 13.7 19.7

C 0.09 0.20 3.5 7.8

D 2.80 3.00 110.2 118.1

E 2.60 3.00 102.3 118.1

E1 1.50 1.75 59.0 68.8

L 0.35 0.55 13.7 21.6

e 0.95 37.4

e1 1.9 74.8

mm mils

11/12

LD2981

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12/12