Datasheet TK71531SCL, TK71530SCL, TK71529SCL, TK71528SCL, TK71522SCL Datasheet (TOKO)

TK715xx

20P

LOW DROPOUT VOLTAGE REGULATOR

FEATURES

■ High Voltage Precision at ± 2.0% or ± 60 mV

■ Very Low Quiescent Current

■ Very Low Dropout Voltage

■ Reverse Bias Protection

■ Miniature Package (SOT-23-3)

■ Short Circuit Protection

■ High Ripple Rejection

DESCRIPTION

The TK715xx is a low dropout linear regulator housed in a small SOT-23-3 package, rated at 350 mW. An internal PNP transistor is used to achieve a low dropout voltage of 105 mV (typ.) at 50 mA load current. This device offers high precision output voltage of ± 2.0 % or ± 60 mV. The TK715xx has a very low quiescent current of 25 µA (typ.) at no load. The low quiescent current and dropout voltage make this part ideal for battery powered applications. The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode, saving cost and board space. The high 64 dB ripple rejection and low noise provide enhanced performance for critical applications.

APPLICATIONS

■ Battery Powered Systems

■ Cellular Telephones

■ Pagers

■ Personal Communications Equipment

■ Portable Instrumentation

■ Portable Consumer Equipment

■ Radio Control Systems

■ Toys

■ Low Voltage Systems

TK715xxS

GND

V

IN

OUT

ORDERING INFORMATION

TK715 SCL

Voltage Code

VOLTAGE CODE

19 = 1.9 V 37 = 3.7 V 20 = 2.0 V 38 = 3.8 V 21 = 2.1 V 39 = 3.9 V 22 = 2.2 V 40 = 4.0 V 23 = 2.3 V 41 = 4.1 V 24 = 2.4 V 42 = 4.2 V 25 = 2.5 V 43 = 4.3 V 26 = 2.6 V 44 = 4.4 V 27 = 2.7 V 45 = 4.5 V 28 = 2.8 V 46 = 4.6 V 29 = 2.9 V 47 = 4.7 V 30 = 3.0 V 48 = 4.8 V 31 = 3.1 V 49 = 4.9 V 32 = 3.2 V 50 = 5.0 V 33 = 3.3 V 60 = 6.0 V 34 = 3.4 V 70 = 7.0 V 35 = 3.5 V 80 = 8.0 V 36 = 3.6 V 90 = 9.0 V

TEMPERATURE CODE

C -30 to +80 C

PACKAGE CODE

S : SOT-23-3

January 1999 TOKO, Inc. Page 1

Tape/ Reel Code Temp. Code Package Code

TAPE/REEL CODE

L: Tape Left

V

IN

BLOCK DIAGRAM

THERMAL

PROTECTION

+

BANDGAP

REFERENCE

GND

V

OUT

+

TK715xx

ABSOLUTE MAXIMUM RATINGS (V

Supply Voltage .............................................. -0.4 to 16 V

Power Dissipation (Note 1) ................................ 350 mW

Reverse Bias.............................................................. 8 V

Storage Temperature (Ambient) ...............-55 to +150 °C

OUT

≥ 5.0 V)

Max. Operating Temperature (Junction) ...............125 °C

Operating Voltage Range............................ 1.8 to 14.0 V

Junction Temperature ...........................................150 °C

Lead Soldering Temperature (10 s) ......................235 °C

Operating Temperature (Ambient) ..............-30 to +80 °C

TK715xx ELECTRICAL CHARACTERISTICS (V

Test conditions: T

= 25 °C, unless otherwise specified.

A

OUT

≥ 5.0 V)

LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU

I

Q

I

DNG

V

TUO

tnerruCtnecseiuQ

tnerruCdnuorGI

egatloVtuptuOI

geReniLnoitalugeReniL

geRdaoLnoitalugeRdaoL

V

PORD

I

TUO

egatloVtuoporD

tnerruCtuptuOsuounitnoC 001Am

TUO

I

TUO

V

V=

NI

V

I

TUO

I

TUO

I

TUO

I

TUO

I

TUO

V,Am0=

≤ V0.45254Aµ

TUO

V,Am0=

≥ V1.40305Aµ

TUO

Am05=4.15.2Am Am01=1elbaTeeSV

)PYT(TUO

V6+

)PYT(TUO

otV1+

0.101Vm

)2etoN(,Am05ot5=0103Vm

)2etoN(,Am001ot5=0205Vm

Am05=501.00810.V

V,Am001=

≥ V4.2581.0082.0V

TUO

V,Am001=

TUO

V4.2<581.0033.0V

RRnoitcejeRelppiR)4,3setoN(46Bd

∆V

/ ∆T

TUO

Note 1: Power dissipation is 350 mW when mounted as recommended. Derate at 2.8 mW/°C for operation above 25 °C. Note 2: Refer to “Definition of Terms.” Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used. Note 4: Ripple rejection is measured at VR = 200 mVrms, VIN = V Gen. Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.

tneiciffeoCerutarepmeTI

TUO

Am01=53C°/mpp

OUT(TYP)

+ 2 V, I

= 10 mA, CL = 4.7 µF, f = 100 Hz.

OUT

Page 2 January 1999 TOKO, Inc.

TK715xx

ABSOLUTE MAXIMUM RATINGS (V

Supply Voltage .............................................. -0.4 to 16 V

Power Dissipation (Note 1) ................................ 350 mW

Reverse Bias.............................................................. 8 V

Storage Temperature (Ambient) ...............-55 to +150 °C

OUT

≤ 6.0 V)

Max. Operating Temperature (Junction) ............... 125 °C

Operating Voltage Range............................ 2.5 to 14.0 V

Junction Temperature ...........................................150 °C

Lead Soldering Temperature (10 s) ......................235 °C

Operating Temperature (Ambient) ..............-30 to +80 °C

TK715xx ELECTRICAL CHARACTERISTICS (V

Test conditions: T

= 25 °C, unless otherwise specified.

A

OUT

≤ 6.0 V)

LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU

I

Q

I

DNG

V

TUO

geReniLnoitalugeReniL

geRdaoLnoitalugeRdaoL

V

PORD

I

TUO

tnerruCtnecseiuQI

tnerruCdnuorGI

egatloVtuptuOI

TUO

V

NI

V

I

TUO

I

TUO

I

egatloVtuoporD

TUO

I

TUO

Am0=2306Aµ

Am05=4.15.2Am Am01=1elbaTeeSV

V=

)PYT(TUO

otV1+

V41xaMroV6+

)2etoN(,Am05ot5=0103Vm

)2etoN(,Am001ot5=0205Vm

Am05=501.00810.V

Am001=581.0082.0V

tnerruCtuptuOsuounitnoC 001Am

0.3Vm

RRnoitcejeRelppiR)4,3setoN(46Bd

/ ∆T

∆V

TUO

Note 1: Power dissipation is 350 mW when mounted as recommended. Derate at 2.8 mW/°C for operation above 25 °C. Note 2: Refer to “Definition of Terms.” Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used. Note 4: Ripple rejection is measured at VR = 200 mVrms, VIN = V Gen. Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.

tneiciffeoCerutarepmeTI

TUO

Am01=53C°/mpp

OUT(TYP)

+ 2 V, I

= 10 mA, CL = 4.7 µF, f = 100 Hz.

OUT

January 1999 TOKO, Inc. Page 3

TK715xx

TK715xx ELECTRICAL CHARACTERISTICS TABLE 1

Output Voltage V

Voltage Code Voltage

OUT(MIN)

V

OUT(MAX)

Test

1.9 V 19 1.840 V 1.960 V 2.9 V

2.0 V 20 1.940 V 2.060 V 3.0 V

2.1 V 21 2.040 V 2.160 V 3.1 V

2.2 V 22 2.140 V 2.260 V 3.2 V

2.3 V 23 2.240 V 2.360 V 3.3 V

2.4 V 24 2.340 V 2.460 V 3.4 V

2.5 V 25 2.440 V 2.560 V 3.5 V

2.6 V 26 2.540 V 2.660 V 3.6 V

2.7 V 27 2.640 V 2.760 V 3.7 V

2.8 V 28 2.740 V 2.860 V 3.8 V

2.9 V 29 2.840 V 2.960 V 3.9 V

3.0 V 30 2.940 V 3.060 V 4.0 V

3.1 V 31 3.040 V 3.160 V 4.1 V

3.2 V 32 3.140 V 3.260 V 4.2 V

3.3 V 33 3.240 V 3.360 V 4.3 V

3.4 V 34 3.335 V 3.465 V 4.4 V

3.5 V 35 3.435 V 3.565 V 4.5 V

3.6 V 36 3.535 V 3.665 V 4.6 V

Output Voltage V

Voltage Code Voltage

OUT(MIN)

V

OUT(MAX)

Test

3.7 V 37 3.630 V 3.770 V 4.7 V

3.8 V 38 3.725 V 3.875 V 4.8 V

3.9 V 39 3.825 V 3.975 V 4.9 V

4.0 V 40 3.920 V 4.080 V 5.0 V

4.1 V 41 4.020 V 4.180 V 5.1 V

4.2 V 42 4.120 V 4.280 V 5.2 V

4.3 V 43 4.215 V 4.385 V 5.3 V

4.4 V 44 4.315 V 4.485 V 5.4 V

4.5 V 45 4.410 V 4.590 V 5.5 V

4.6 V 46 4.510 V 4.690 V 5.6 V

4.7 V 47 4.605 V 4.795 V 5.7 V

4.8 V 48 4.705 V 4.895 V 5.8 V

4.9 V 49 4.800 V 5.000 V 5.9 V

5.0 V 50 4.900 V 5.100 V 6.0 V

6.0 V 60 5.880 V 6.120 V 7.0 V

7.0 V 70 6.860 V 7.140 V 8.0 V

8.0 V 80 7.840 V 8.160 V 9.0 V

9.0 V 90 8.820 V 9.180 V 9.0 V

Page 4 January 1999 TOKO, Inc.

TEST CIRCUIT

V

(V)

V

OUT

(25 mV/ DIV)

OUTPUT VOLTAGE VS.

INPUT VOLTAGE

V

IN

(V) (50 mV/DIV)

0 VIN = V

OUT

V

OUT

TYPICAL

I

OUT

= 90 mA

I

OUT

= 0 mA

I

OUT

= 60 mA

I

OUT

= 30 mA

V

(

0

V/

DIV)

I

(

A)

I

(

A)

I

IN

V

IN

+ _

+

C

IN

0.1 µF

V

IN

GND

V

OUT

+

C

L

2.2 µF

I

OUT

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25 °C, unless otherwise specified.

V

TK715xx

OUT

(5 mV/ DIV)

OUT

V

m 5

OUT

January 1999 TOKO, Inc. Page 5

LOAD REGULATION

V

TYPICAL

OUT

0 50 100

I

(mA)

OUT

LINE REGULATION

V

TYPICAL

OUT

0 10 20

VIN (V)

SHORT CIRCUIT PROTECTION

5

4

3

OUT

2

1

0

0 100 200

I

(mA)

OUT

REVERSE BIAS CURRENT RANGE

(VIN = 0 V)

100

80

V

= 2.0 V

µ

REV

60

40

OUT

20

V

0

OUT

0 5 10

V

(V)

REV

= 8.0 V

QUIESCENT CURRENT VS.

INPUT VOLTAGE

V

OUT

I

OUT

= 3 V

2

m

1

Q

0

0 5 10

VIN (V)

= 0 mA

TK715xx

715xx

C

L

4.7 µF

V

OUT

V

IN

C

IN

0.1 to 1 µF

RIPPLE REJECTION CIRCUIT

V

(

V)

I

(

A)

I

(

A)

I

(

A)

NOISE

(

V)

NOISE

(

V)

(

)

V

(

V)

TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)

TA = 25 °C, unless otherwise specified.

OUTPUT CURRENT

DROPOUT VOLTAGE

0

m

-100

DROP

-200 0 50 100

I

(mA)

OUT

MAXIMUM OUTPUT CURRENT

TEMPERATURE

220

V

IS 2.7 V OR MORE

OUT

200

m

180

OUT

160

VS.

GROUND CURRENT 1

OUTPUT CURRENT

500

400

µ

300

GND

200

100

0

0 5 10 15 20 25

I

(mA)

OUT

OUTPUT VOLTAGE

TEMPERATURE

20

10

-10

3.0 V

0

2.9 V

m

OUT

∆

VS.

GROUND CURRENT 2

OUTPUT CURRENT

5

4

m

3

GND

2

1

0

0 20 40 60 80 100

I

(mA)

OUT

NOISE LEVEL

OUTPUT CURRENT

200

CL =

180

µ

160

140

VS.

1 µF

2.2 µF

3.3 µF

4.7 µF 10 µF

150

-20

120

CIN =10 µF

BW = 10 Hz to 80 kHz

-50 0 50 100 TA (°C)

NOISE LEVEL

VS.

C

L

-30

-50 0 50 100 TA (°C)

RIPPLE REJECTION

100

0 50 100

I

(mA)

OUT

0

I

200

180

µ

160

140

120

100

1.0 5.0 10

Page 6 January 1999 TOKO, Inc.

CIN =10 µF

BW = 10 Hz to 80 kHz

I

OUT

=

5 mA 10 mA 30 mA 60 mA 90 mA

CL (µF)

-20

-40

RR (dB)

-60

-80

-100

0.01 0.1 1 10 kHz

f

= 10 mA

OUT

CL = 4.7 µF

dB

V

TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)

TA = 25 °C, unless otherwise specified.

TK715xx

LOAD CURRENT STEP RESPONSE 2

CL =4.7 µF

OUT

I

= 0 to 100 mA

OUT

OUT1

V

I

OUT

OUT2

V

OUT (20 mV/ DIV)

NOTE: V

DELAYED 50 µs FOR CLARITY

OUT2

TIME (50 µs/ DIV)

LOAD CURRENT STEP RESPONSE 1

CL =4.7 µF

OUT

I

= 5 to 100 mA

OUT

OUT1

V

= 0 to 30 mA

LINE VOLTAGE STEP RESPONSE

V

+ 2 V

OUT

IN

V

= 4.7 µF

C

L

OUT

V

OUT (10 mV/ DIV)

I

= 10 mA

OUT

TIME (50 µs/ DIV)

V

OUT

+ 1 V

NOISE SPECTRUM

RB = 1 kHz, VB = 100 Hz

CL = 4.7 µF, I

OUT

= 60 mA OUT

-50

SPECTRUM ANALYZER BACK-

GROUND NOISE

-100

0 500 k 1 M

f (kHz)

= 5 mA

OUT (20 mV/ DIV)

OUT2

V

NOTE: V

I

= 5 to 30 mA

OUT

DELAYED 50 µs FOR CLARITY

OUT2

TIME (50 µs/ DIV)

January 1999 TOKO, Inc. Page 7

TK715xx

DEFINITION AND EXPLANATION OF TECHNICAL TERMS

OUTPUT VOLTAGE (V

The output voltage is specified with VIN = (V and I

= 30 mA.

OUT

DROPOUT VOLTAGE (V

OUT

)

DROP

OUT(TYP)

+ 1 V)

)

The dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation. Below this value, the output voltage will fall as the input voltage is reduced. It is dependent upon the load current and the junction temperature.

CONTINUOUS OUTPUT CURRENT (I

OUT

)

Normal operating output current. This is limited by package power dissipation.

PULSE OUTPUT CURRENT (I

Maximum pulse width 5 ms at V

OUT(PULSE)

OUT

)

above 2.0 V, duty cycle

12.5%: pulse load only.

LINE REGULATION (Line Reg)

Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. The line regulation is specified as the input voltage is changed from VIN = V

OUT(TYP)

+ 1 V to VIN = V

OUT(TYP)

+ 6 V or VIN =

max 14 V.

current.

RIPPLE REJECTION RATIO (RR)

Ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. It is specified with 200 mVrms, 100 Hz superimposed on the input voltage, where VIN = V

OUT(TYP)

+ 2.0 V. The output decoupling capacitor is set to 4.7 µF and the load current is set to 5 mA. Ripple rejection is the ratio of the ripple content of the output vs. the input and is expressed in dB.

REVERSE VOLTAGE PROTECTION

Reverse voltage protection prevents damage due to the output voltage being higher than the input voltage. This fault condition can occur when the output capacitor remains charged and the input is reduced to zero, or when an external voltage higher than the input voltage is applied to the output side.

REDUCTION OF OUTPUT NOISE

Although the architecture of the Toko regulators are designed to minimize semiconductor noise, further reduction can be achieved by the selection of external components. The obvious solution is to increase the size of the output capacitor. Please note that several parameters are affected by the value of the capacitors and bench testing is recommended when deviating from standard values.

LOAD REGULATION (Load Reg)

Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. It is a pulsed measurement to minimize temperature effects with the input voltage set to VIN = V

OUT(TYP)

+1 V. The load regulation is specified under two output current step conditions of 1 mA to 60 mA and 1 mA to 100 mA.

QUIESCENT CURRENT (IQ)

PACKAGE POWER DISSIPATION (PD)

This is the power dissipation level at which the thermal sensor is activated. The IC contains an internal thermal sensor which monitors the junction temperature. When the junction temperature exceeds the monitor threshold of 150 °C, the IC is shut down. The junction temperature rises as the difference between the input power (VIN x IIN) and the output power (V

OUT

x I

) increases. The rate of

OUT

temperature rise is greatly affected by the mounting pad

configuration on the PCB, the board material, and the The quiescent current is the current which flows through the ground terminal under no load conditions (I

OUT

= 0 mA).

ambient temperature. When the IC mounting has good

thermal conductivity, the junction temperature will be low

even if the power dissipation is great. When mounted on

GROUND CURRENT (I

GND

)

the recommended mounting pad, the power dissipation of

the SOT-23-3 is increased to 350 mW. For operation at Ground current is the current which flows through the ground pin(s). It is defined as IIN - I

, excluding control

OUT

ambient temperatures over 25 °C, the power dissipation of

the SOT-23-3 device should be derated at 2.8 mW/°C. To

Page 8 January 1999 TOKO, Inc.

TK715xx

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)

determine the power dissipation for shutdown when mounted, attach the device on the actual PCB and deliberately increase the output current (or raise the input voltage) until the thermal protection circuit is activated. Calculate the power dissipation of the device by subtracting the output power from the input power. These measurements should allow for the ambient temperature of the PCB. The value obtained from PD /(150 °C - TA) is the derating factor. The PCB mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. As a general rule, the lower the temperature, the better the reliability of the device. The thermal resistance when mounted is expressed as follows:

Tj = 0jA x PD + T

A

For Toko ICs, the internal limit for junction temperature is 150 °C. If the ambient temperature (TA) is 25 °C, then:

150 °C = 0jA x PD + 25 °C 0jA = 125 °C/ P

D

3) Plot PD1 against 25 °C

4) Connect P

to the point corresponding to the 150 °C

D1

with a straight line.

5) In design, take a vertical line from the maximum operating temperature (e.g., 75 °C) to the derating curve.

6) Read off the value of PD against the point at which the vertical line intersects the derating curve. This is taken as the maximum power dissipation, DPD.

The maximum operating current is:

I

OUT

(mW)

D

P

= (D

500

400

300

200

PD

/ (V

IN(MAX) - VOUT

MOUNTED AS

SHOWN

FREE AIR

)

PD is the value when the thermal sensor is activated. A simple way to determine PD is to calculate VIN x IIN when the output side is shorted. Input current gradually falls as temperature rises. You should use the value when thermal equilibrium is reached.

The range of usable currents can also be found from the graph below.

(mW)

P

D

PD

3

6

4

5

25 50 75 150

TA (°C)

Procedure:

1) Find P

D

2) PD1 is taken to be PD x (~ 0.8 - 0.9)

100

0

0 50 100 150

TA (°C)

SOT-23-3 POWER DISSIPATION CURVE

January 1999 TOKO, Inc. Page 9

TK715xx

100

10

1

0.1

0 .01

0 50 100

I

OUT

(mA)

ESR (Ω)

STABLE

OPERATION

AREA

APPLICATION INFORMATION

INPUT-OUTPUT CAPACITORS

Linear regulators require input and output capacitors in order to maintain regulator loop stability. The output capacitor should be selected within the Equivalent Series Resistance (ESR) range as shown in the graphs below for stable operation. When a ceramic capacitor is connected in parallel with the output capacitor, a maximum of 1000 pF is recommended. This is because the ceramic capacitor's electrical characteristics (capacitance and ESR) vary widely over temperature. If a large ceramic capacitor is used, a resistor should be connected in series with it to bring it into the stable operating area shown in the graphs below. Minimum resistance should be added to maintain load and line transient response.

Note: It is very important to check the selected manufacturers electrical characteristics (capacitance and ESR) over temperature.

715xxS

C

ESR

L

TK715xxS

C

ESR

L

Note: It is not necessary to connect a ceramic capacitor

in parallel with an aluminum or tantalum output capacitor.

CL = 1.0 µF

100

10

STABLE

ESR (Ω)

1

0.1

OPERATION

AREA

100

ESR (Ω)

10

1

0.1

CL = 2.2 µF

STABLE

OPERATION

AREA

CL = 4.7 µF

0 .01

0 50 100

Page 10 January 1999 TOKO, Inc.

I

OUT

(mA)

0 .01

0 50 100

I

OUT

(mA)

TK715xx

APPLICATION INFORMATION (CONT.)

In general, the capacitor should be at least 1 µF and be rated for the actual ambient operating temperature range. The table below shows typical characteristics for several types and values of capacitance. Please note that the ESR varies widely depending upon manufacturer, type, size, and material.

ESR

Capacitance

Aluminum

Capacitor

Tantalum

Capacitor

Ceramic

Capacitor

1.0 µF 2.4 Ω 2.3 Ω 0.140 Ω

2.2 µF 2.0 Ω 1.9 Ω 0.059 Ω

3.3 µF 4.6 Ω 1.0 Ω 0.049 Ω 10 µF 1.4 Ω 0.5 Ω 0.025 Ω

Note: ESR is measured at 10 kHz.

BOARD LAYOUT

Copper pattern should be as large as possible. Power dissipation is 350 mW for SOT-23-3. A low ESR capacitor is recommended. For low temperature operation, select a capacitor with a low ESR at the lowest operating temperature to prevent oscillation, degradation of ripple rejection and increase in noise. The minimum recommended capacitance is

2.2 µF. The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode. This saves both

cost and board space.

V

IN

GND

V

OUT

++

SOT-23-3 BOARD LAYOUT

January 1999 TOKO, Inc. Page 11

TK715xx

APPLICATION INFORMATION (CONT.)

REVERSE BIAS PROTECTION

The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode. This saves both cost and board space.

V

IN

715xxS

GND

V

OUT

Another reverse bias protection technique is illustrated below. The extra diode and extra capacitor are not necessary with the TK715xx. The high output voltage accuracy is maintained because the diode forward voltage variations over temperature and load current have been eliminated.

V

IN

TK715xxS

OUTV

SWITCHING OPERATION

Even though the input voltages or the output voltages are different, the outputs of the TK715xx regulators can be connected together, and the output voltages switched. If two or more TK715xx regulators are turned ON simultaneously, the highest output voltage will be present.

V

IN

V

IN

TK71530

TK71528

V

OUT

3.0 OR 2.8 V

CURRENT BOOST OPERATION

The output current can be increased by connecting an external PNP transistor as shown below. The output current capability depends upon the Hfe of the external transistor. Note: The TK715xx internal short circuit protection and thermal sensor do not protect the external transistor.

V

IN

V

PARALLEL OPERATION

The series resistor R is put in the input line of the low output

150 Ω

IN

TK715xx

0.22 µF

V

3.3 µF

OUT

voltage regulator in order to prevent overdissipation. The voltage dropped across the resistor reduces the large input-to-output voltage across the regulator, reducing the power dissipation in the device.

V

IN

TK71550

TK71530

R

TK71520

5 V

3 V

2 V

Page 12 January 1999 TOKO, Inc.

PACKAGE OUTLINE

TK715xx

SOT-23-3

Product Code

Dimensions are shown in millimeters Tolerance: x.x = ± 0.2 mm (unless otherwise specified)

Marking Information

0.7

3

Marking

Voltage Code

+ 0.1

0.4

e

0.95

1

0.95

2

2.9

0.1

C10.1

1.4 max

1.1

+ 0.1

0 - 0.1

(0.3)

0.15

1.0

e e

0.95 0.95 e1

1.90

Recommended Mounting Pad

1.6

+ 0.3

2.8

2.4 e1

15 max.

(0.4)

Product Code T

Voltage Code TK71519S 19 TK71520S 20 TK71521S 21 TK71522S 22 TK71523S 23 TK71524S 24 TK71525S 25 TK71526S 26 TK71527S 27 TK71528S 28 TK71529S 29 TK71530S 30 TK71531S 31 TK71532S 32 TK71533S 33 TK71534S 34 TK71535S 35 TK71536S 36 TK71537S 37 TK71538S 38 TK71539S 39 TK71540S 40 TK71541S 41 TK71542S 42 TK71543S 43 TK71544S 44 TK71545S 45 TK71546S 46 TK71547S 47 TK71548S 48 TK71549S 49 TK71550S 50 TK71560S 60 TK71570S 70 TK71580S 80 TK71590S 90

Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864

TOKO AMERICA REGIONAL OFFICES

Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864

Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790

Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223

Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375

Visit our Internet site at http://www.tokoam.com

The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.

January 1999 TOKO, Inc. Page 13

IC-xxx-TK715xx

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