Datasheet TK11380BUIB, TK11380BMIL, TK11350BUIB, TK11350BMIL, TK11349BUIB Datasheet (TOKO)

TK113xxBM/U

20P

VOLT AGE REGULATOR WITH ON/OFF SWITCH

FEATURES

■ High Voltage Precision at ± 2.0%

■ Active Low On/Off Control

■ Very Low Dropout Voltage 80 mV at 30 mA

■ Very Low Noise

■ Very Small SOT23L or SOT89 Surface Mount

Packages

■ Internal Thermal Shutdown

■ Short Circuit Protection

DESCRIPTION

The TK113xxB is a low dropout linear regulator with a built­in electronic switch. The device is in the “on” state when
the control pin is pulled to a low level. An external capacitor
can be connected to the noise bypass pin to lower the
output noise level to 30 µVrms.

An internal PNP pass transistor is used to achieve a low
dropout voltage of 80 mV (typ.) at 30 mA load current. The
TK113xxB has a very low quiescent current of 170 µA at no
load and 1 mA with a 30 mA load. The standby current is
typically 100 nA. The internal thermal shut down circuitry
limits the junction temperature to below 150 °C. The load
current is internally monitored and the device will shut
down in the presence of a short circuit or overcurrent
condition at the output.

APPLICATIONS

■ Battery Powered Systems

■ Cellular Telephones

■ Pagers

■ Personal Communications Equipment

■ Portable Instrumentation

■ Portable Consumer Equipment

■ Radio Control Systems

■ Toys

■ Low Voltage Systems

The TK113xxB is available in either 6-pin SOT23L or 5-pin
SOT89 surface mount packages.

TK113xxB

V

IN

GND

V

OUT

V

OUT

GND

SOT23L

CONTROL

GND

NOISE BYPASS

NOISE BYPASS

GND

SOT89

CONTROL V

IN

ORDERING INFORMATION

TK113 B

Voltage Code

Package Code

VOLTAGE CODE

20 = 2.0 V 37 = 3.7 V
21 = 2.1 V 38 = 3.8 V
22 = 2.2 V 39 = 3.9 V
23 = 2.3 V 40 = 4.0 V
24 = 2.4 V 41 = 4.1 V
25 = 2.5 V 42 = 4.2 V
26 = 2.6 V 43 = 4.3 V
27 = 2.7 V 44 = 4.4 V
28 = 2.8 V 45 = 4.5 V
29 = 2.9 V 46 = 4.6 V
30 = 3.0 V 47 = 4.7 V
31 = 3.1 V 48 = 4.8 V
32 = 3.2 V 49 = 4.9 V
33 = 3.3 V 50 = 5.0 V
34 = 3.4 V 55 = 5.5 V
35 = 3.5 V 60 = 6.0 V
36 = 3.6 V 80 = 8.0 V

PACKAGE CODE:

M: SOT23L
U: SOT89

April 2000 TOKO, Inc. Page 1

Tape/Reel Code
Temp. Code

TAPE/REEL CODE

L: Tape Left (SOT23L)
B: Tape Left (SOT89)

TEMP. CODE:

C: -30 to +80 °C
I: -40 to +85°C

V

CONTROL

IN

BLOCK DIAGRAM

THERMAL

PROTECTION

BANDGAP

REFERENCE

NOISE

BYPASS

V

GND

OUT

TK113xxBM/U

ABSOLUTE MAXIMUM RATINGS (V

Supply Voltage......................................................... 16 V

Output Current .................................................... 260 mA

Power Dissipation SOT-23L (Note 1) ............... 600 mW

Power Dissipation SOT-23L (Note 1) ............... 900 mW

OUT

≥ 2.0 V)

Storage Temperature Range................... -55 to +150 °C

Operating Temperature Range.................. -30 to +80 °C

Voltage Range ............................................ 1.8 to 14.5 V

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

Reverse Bias............................................................ 10 V

TK113xxBM/UC ELECTRICAL CHARACTERISTICS (V

Test conditions: T

LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU

I

Q

I

YBTS

V

TUO

geReniLnoitalugeReniL

geRdaoLnoitalugeRdaoL

V

PORD

I

TUO

I

)ESLUP(TUO

RRnoitcejeRelppiR

V

ON

V

fer

= 25 °C, unless otherwise specified.

A

tnerruCtnecseiuQI

tnerruCybdnatSV

egatloVtuptuOI

egatloVtuoporD

TUO

NI

TUO

V

≤ )2etoN(,V5.50.302Vm

TUO

V

≥ )2etoN(,V6.55104Vm

TUO

I

TUO

I

TUO

I

TUO

I

TUO

I

TUO

tnerruCtuptuOsuounitnoC)2etoN(051Am

tnerruCtuptuOesluPelcycytud%5.21,eslupsm5081Am

V

V=

NI

V

ELPPIR

zH01 ≤ f ≤ C,zHk08

egatloVesioNtuptuO

C

N

I

TUO

lanimreTssapyBesioN

egatloV

IgnidulcxE,Am0=

TNOC

FFOtuptuO,V8=1.0Aµ

Am03=1elbaTeeSV

)2etoN(,Am06ot1=603Vm

)2etoN(,Am001ot1=8106Vm
)2etoN(,Am051ot1=3209Vm

)2etoN(,Am06=21.002.0V

)2etoN(,Am051=62.093.0V

C,zH004=f

L

TUO

C,Fµ01=

N

I,V5.1+

TUO

,Am03=

)3etoN(,smrVm001=

V,Fµ1.0=

L

V=

NC

TUO

,Fµ01=

,V5.1+

)4,3setoN(,Am06=

OUT

,Fµ1.0=

≥ 2.0 V)

071052Aµ

06Bd

03smrVµ

52.1V

∆V

TUO

/∆T

tneiciffeoCerutarepmeTI

TUO

Am01=04C°/mpp

SNOITACIFICEPSLANIMRETLORTNOC

I

TNOC

V
V

Note 1: When mounted as recommended. Derate at 4.8 mW/°C for SOT-23L and 6.4 mW/°C for SOT-89 packages 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: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal.
Gen. Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.

)NO(TNOC

)FFO(TNOC

tnerruClortnoCV

TNOC

NOtuptuO,V8.1=2153Aµ

NOegatloVlortnoCNOtuptuO

FFOegatloVlortnoCFFOtuptuO

VCC6.0-

VCC8.1-

V
V

Page 2 April 2000 TOKO, Inc.

TK113xxBM/U

ABSOLUTE MAXIMUM RATINGS TK113xxBI (V

Supply Voltage ......................................................... 16 V

Power Dissipation SOT-23L (Note1).................. 600 mW

Power Dissipation SOT-89 (Note1).................... 900 mW

Reverse Bias............................................................ 10 V

Storage Temperature Range ................... -55 to +150 °C

Operating Temperature Range ...................-40 to +85 °C

Operating Voltage Range............................ 1.8 to 14.5 V

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

≥ 2.5 V)

OUT

TK113xxBM/UI ELECTRICAL CHARACTERISTICS (V

Test conditions: T

LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU

I

Q

I

YBTS

V

TUO

geReniLnoitalugeReniL

geRdaoLnoitalugeRdaoL

V

PORD

I

TUO

I

)ESLUP(TUO

RRnoitcejeRelppiR

V

ON

V

fer

= -40 to 85 °C, unless otherwise specified.

A

tnerruCtnecseiuQI

tnerruCybdnatSV

egatloVtuptuOI

egatloVtuoporD

TUO

NI

TUO

V

TUO

V

TUO

I

TUO

I

TUO

I

TUO

I

TUO

I

TUO

Am03=2elbaTeeSV

≤ )2etoN(,V5.50.352Vm

tnerruCtuptuOsuounitnoC)2etoN(051Am

tnerruCtuptuOesluPelcycytud%5.21,eslupsm5081Am

C,zH004=f
VNIV=
V

ELPPIR

L

TUO

zH01 ≤ f ≤ C,zHk08

egatloVesioNtuptuO

C

N

I

TUO

V,Fµ1.0=

lanimreTssapyBesioN

egatloV

IgnidulcxE,Am0=

TNOC

FFOtuptuO,V8=2.0Aµ

)2etoN(,V6.55104Vm

)2etoN(,Am06ot1=604Vm

)2etoN(,Am001ot1=8108Vm
)2etoN(,Am051ot1=32011Vm

)2etoN(,Am06=21.032.0V

)2etoN(,Am051=62.004.0V

C,Fµ01=

N

I,V5.1+

TUO

,Am03=

)3etoN(,smrVm001=

L

V=

NC

TUO

,Fµ01=

,V5.1+

)4,3setoN(,Am06=

≥ 2.5 V)

OUT

,Fµ1.0=

071003Aµ

06Bd

03smrVµ

52.1V

∆V

TUO

/∆T

tneiciffeoCerutarepmeTI

TUO

Am01=04C°/mpp

SNOITACIFICEPSLANIMRETLORTNOC

I

TNOC

V
V

Note 1: When mounted as recommended. Derate at 4.8 mw/°C for SOT-23L and 6.4 mw/°C for SOT-89 packages 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: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal.
Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.
Gen Note: For Line Regulation, typ. and max. is changed to V

)NO(TNOC

)FFO(TNOC

tnerruClortnoCV

TNOC

NOtuptuO,V8.1=2104Aµ

NOegatloVlortnoCNOtuptuO

FFOegatloVlortnoCFFOtuptuO

> 5.6 V.

OUT

VCC5.0-

VCC0.2-

V
V

April 2000 TOKO, Inc. Page 3

TK113xxBM/U

TK113xxBM/UC ELECTRICAL CHARACTERISTICS TABLE 1

Test conditions: T

Output Voltage V

Voltage Code Voltage

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

= 25 °C, I

A

OUT(MIN)

= 30 mA, unless otherwise specified.

OUT

V

OUT(MAX)

Test

Output Voltage V

Voltage Code Voltage

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

5.5 V 55 5.390 V 5.610 V 6.5 V

6.0 V 60 5.880 V 6.120 V 7.0 V

8.0 V 80 7.840 V 8.160 V 9.0 V

OUT(MIN)

V

OUT(MAX)

Test

Page 4 April 2000 TOKO, Inc.

TK113xxBM/U

TK113xxBM/UI ELECTRICAL CHARACTERISTICS TABLE 2

Test Conditions: VIN = V

Room Temp. Range (TA = 25 °C) Full Temp. Range (TA = -40 to +85 °C)

Output Voltage V

Voltage Code

2.5 V 25 2.440 V 2.560 V 2.400 V 2.600 V

2.6 V 26 2.540 V 2.660 V 2.500 V 2.700 V

2.7 V 27 2.640 V 2.760 V 2.600 V 2.800 V

2.8 V 28 2.750 V 2.860 V 2.700 V 2.900 V

2.9 V 29 2.840 V 2.960 V 2.800 V 3.000 V

3.0 V 30 2.940 V 3.060 V 2.900 V 3.100 V

3.1 V 31 3.040 V 3.160 V 3.000 V 3.200 V

3.2 V 32 3.140 V 3.260 V 3.095 V 3.305 V

3.3 V 33 3.240 V 3.360 V 3.190 V 3.410 V

3.4 V 34 3.335 V 3.465 V 3.290 V 3.510 V

3.5 V 35 3.435 V 3.565 V 3.385 V 3.615 V

3.6 V 36 3.535 V 3.665 V 3.485 V 3.720 V

3.7 V 37 3.630 V 3.770 V 3.580 V 3.820 V

3.8 V 38 3.725 V 3.875 V 3.675 V 3.925 V

3.9 V 39 3.825 V 3.975 V 3.770 V 4.030 V

4.0 V 40 3.920 V 4.080 V 3.870 V 4.130 V

4.1 V 41 4.020 V 4.180 V 3.965 V 4.235 V

4.2 V 42 4.120 V 4.280 V 4.060 V 4.335 V

4.3 V 43 4.215 V 4.385 V 4.160 V 4.440 V

4.4 V 44 4.315 V 4.485 V 4.255 V 4.545 V

4.5 V 45 4.410 V 4.590 V 4.350 V 4.645 V

4.6 V 46 4.510 V 4.690 V 4.450 V 4.750 V

4.7 V 47 4.605 V 4.795 V 4.545 V 4.850 V

4.8 V 48 4.705 V 4.895 V 4.640 V 4.955 V

4.9 V 49 4.800 V 5.000 V 4.740 V 5.060 V

5.0 V 50 4.900 V 5.100 V 4.835 V 5.165 V

5.5 V 55 5.390 V 5.610 V 5.320 V 5.680 V

6.0 V 60 5.880 V 6.120 V 5.805 V 6.195 V

8.0 V 80 7.840 V 8.160 V 7.745 V 8.265 V

OUT(TYP)

+ 1 V, I

= 30 mA, unless otherwise specified.

OUT

OUT(MIN)

V

OUT(MAX)

V

OUT(MIN)

V

OUT(MAX)

April 2000 TOKO, Inc. Page 5

TK113xxBM/U

(µs)

TEST CIRCUITS

SOT23L SOT89

I

V

IN

CONT

IN

V

IN

1 µF

CONT

I

CONT

+

+

+

V

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT VOLTAGE RESPONSE

CONT

V

OUT

V

0 200 600

(OFF→ON)

CN = 0.01 µF

CN = 0.1 µF

I

LOAD

400

TIME

CL = 2.2 µF

= 30 mA

V

OUT

NOISE

BYPASS

C

0.1 µF

800

I

V

OUT

2.2 µF

N

OUT

TRANSIENT RESPONSE

V

IN

CONT

1 µF

113XXB

R

S

C

0.1 µF

N

TA = 25 °C, unless otherwise specified.

LOAD REGULATION

(5 mV/DIV)

OUT

V

0 50 100

I

(mA)

OUT

V

V

C

L = 10 µF to 0.22 µF

V

OUT(TYP)

I

IN

OUT

OUT

I

V

OUT

+

2.2 µF

NOISE

BYPASS

C

0.1 µF

OUT

N

V

CONT

IN

I

CONT

+

1.0 µF

+

V

IN

+

V

CONT 1

Note: Connect pin 5 to
ground for heat sink

SHORT CIRCUIT CURRENT

5

4

3

OUT (V)

V

2

1

0

0

I

OUT

150

300

(mA)

OUTPUT VOLTAGE

V

OUT(TYP)

I

OUT

(25 mV/DIV)

OUT

V

0V

VOLTAGE

= 0 mA

I

OUT

= V

IN

OUT

VIN (V) (50 mV/DIV)

I

I

OUT

= 90 mA

VS.

INPUT

= 30 mA

OUT

= 50 mA

V

(50 mV/DIV)

OUT

V

0

LINE REGULATION

OUT(TYP)

10

V

IN

(V)

20

DROPOUT VOLTAGE

CURRENT

VS.

OUTPUT

0

-100

(mV)

-200

DROP

-300

V

-400

I

OUT

100

(mA)

0200

Page 6 April 2000 TOKO, Inc.

TK113xxBM/U

I

(

A)

TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)

TA = 25 °C, unless otherwise specified.

GROUND CURRENT VS. OUTPUT

10

8

6

(mA)

GND

I

4

2

0

0 100 200

QUIESCENT CURRENT (ON
MODE)

2

V

OUT

(mA)

1

Q

I

0

010

CURRENT

I

OUT

VS.

=

3 V 5 V

2 V 4 V

(mA)

INPUT VOLTAGE

I

= 0 mA

OUT

5

VIN (V )

500

400

µ

300

REV

200

100

(mA)

Q

I

REVERSE BIAS CURRENT

0

020

QUIESCENT CURRENT

2

1

0

-50 100

(VIN = 0 V)

10

V

(V)

REV

I

= 60 mA

OUT

I

= 30 mA

OUT

050

TA (°C)

QUIESCENT CURRENT (OFF

VS. INPUT VOLTAGE

MODE)

100

(pA)

50

Q

I

0

020

DROPOUT VOLTAGE

500

400

(mV)

300

DROP

200

V

100

0

-50 100

10

V

(V)

IN

I

= 150 mA

OUT

I

= 60 mA

OUT

I

= 30 mA

OUT

050

TA (°C)

CONTROL CURRENT

50

40

(µA)

30

CONT

I

20

10

0

-50 100

050

V

TA (°C)

V

CONT

CONT

= 5 V

= 1.8 V

V

(V

0

TA (°C)

, ON POINT)

OUT

R

CONT

50

CONT

2.0

(V)

1.0

CONT

V

0

-50 100

= 0 Ω

(mA)

OUT

I

MAXIMUM OUTPUT CURRENT

V

= 2.7 V

OUT

280

270

260

250

240

-50 100

V

= 2 to 2.6 V

OUT

050

TA (°C)

April 2000 TOKO, Inc. Page 7

TK113xxBM/U

LOAD CURRENT STEP RESPONSE

I

OUT

V

OUT

CN = 0.01 F, CL = 2.2 µF

100 mA

50 mA

CN = 0.1 F, CL = 10 µF

V

OUT

TIME (50 µs/DIV)

V

OUT

(50 mV/DIV)

TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)

TA = 25 °C, unless otherwise specified.

OUTPUT VOLTAGE VARIATION

10

V

= 2 V

(mV)

OUT

-10

∆V

-20

-30

-50

dB

-100

OUT

0

3 V

5 V

-50 100

0

01 M

050

TA (°C)

NOISE SPECTRUM

CL = 3.3 µF, CN = NONE

CL = 3.3 µF, CN = 0.1 µF

SPECTRUM ANALYZER BACK-

GROUND NOISE

500 k

f (Hz)

4 V

LINE VOLTAGE STEP RESPONSE

IN

V

OUT

V

OUT (10 mV/DIV)

V

OUT

V

250

200

150

CL = 3.3µF

CL = 10 µF

100

NOISE (µV)

50

0

1 PF 10

V

+2 V

OUT

V

OUT

CN = 0.001 µF, CL = .22 µF

CN = 0.01 µF, CL = 2.2 µF

TIME (50 µs/DIV)

NOISE LEVEL

VS.

C

N

V

= 3 V

OUT

I

60 mA

OUT =

CL = 2.2 µF

1000

100 .01 µF .1

C

N

+1 V

0

-20

-40

RR (dB)

-60

-80

-100

0.01

RIPPLE REJECTION

CN = 0.1 µF

0.1

I

OUT

CN = 0.01 µF

1

f (kHz)

= 30 mA

10

100

Page 8 April 2000 TOKO, Inc.

TK113xxBM/U

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.

OUTPUT CURRENT (I

OUT(MAX)

)

This is the maximum continuous output current as specified
under the condition where the output voltage drops 0.3 V
below the value specified with I
voltage is set to V

+1 V, and the current is pulsed to

OUT

= 30 mA. The input

OUT

minimize temperature effect.

CONTINUOUS OUTPUT CURRENT (I

OUT

)

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

PULSE OUTPUT CURRENT (I

OUT(PULSE)

)

QUIESCENT CURRENT (IQ)

The quiescent current is the current which flows through
the ground terminal under no load conditions (I

GROUND CURRENT (I

GND

)

= 0 mA).

OUT

Ground current is the current which flows through the
ground pin(s). It is defined as IIN - I

, excluding control

OUT

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 100 mVrms, 400 Hz superimposed on the
input voltage, where VIN = V

+ 1.5 V. The output

OUT

decoupling capacitor is set to 10 µF, the noise bypass
capacitor is set to 0.1 µF, and the load current is set to 30
mA. Ripple rejection is the ratio of the ripple content of the
output vs. the input and is expressed in dB.

STANDBY CURRENT (I

STBY

)

Standby current is the current which flows into the regulator
when the output is turned off by the control function
(V

= VIN). It is measured with VIN = 8 V (9 V for the

CONT

8 V output device).

Max pulse width 5 ms, 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

SENSOR CIRCUITS

Overcurrent Sensor

The overcurrent sensor protects the device in the event
that the output is shorted to ground.

line regulation is specified as the input voltage is changed
from VIN = V

OUT(TYP)

LOAD REGULATION (Load Reg)

+ 1 V to VIN = V

OUT(TYP)

+ 6 V.

Thermal Sensor

The thermal sensor protects the device in the event that
the junction temperature exceeds the safe value (Tj = 150

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

+1 V. The load

OUT

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

°C). This temperature rise can be caused by external heat,
excessive power dissipation caused by large input to
output voltage drops, or excessive output current. The
regulator will shut off when the temperature exceeds the
safe value. As the junction temperatures decrease, the
regulator will begin to operate again. Under sustained fault
conditions, the regulator output will oscillate as the device
turns off then resets. Damage may occur to the device
under extreme fault conditions.

April 2000 TOKO, Inc. Page 9

TK113xxBM/U

I

(

A)

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)

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.

CONTROL CURRENT

V

IN

R

SW

C

C

N

If the control function is not used, connect the control
terminal to V

. When the control function is used, the

IN

control current can be reduced by inserting a series
resistor (R

) between the control terminal and VIN. The

CONT

value of this resistor should be determined from the graph
below.

CONTROL PIN CURRENT VS.

50

V

OUT

40

µ

30

CONT

20

10

0

0123

VOLTAGE

R

CONT

R

CONT

V

(V)

CONT

= 0

=100K

45

SOT23L

C

N

SOT89

Note: V

The requirement for the pullup resistor (R

= differential voltage from VIN pin to V

CONT

CONT

PULLUP

pin.

) is deter­mined by the external control circuitry. For example, open
collector/open drain logic may require R
perature; CMOS logic will not require R

V

IN

R

C

SW

PULLUP

PULLUP

.

over tem-

Page 10 April 2000 TOKO, Inc.

TK113xxBM/U

(µs)

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)

ON/OFF RESPONSE WITH CONTROL AND LOAD TRANSIENT RESPONSE

The turn-on time depends upon the value of the output capacitor and the noise bypass capacitor. The turn-on time will
increase with the value of either capacitor. The graphs below shows the relationship between turn-on time and load
capacitance. If the value of these capacitors is reduced, the load and line regulation will suffer and the noise voltage will
increase. If the value of these capacitors is increased, the turn-on time will increase.

OUTPUT VOLTAGE RESPONSE

I

LOAD

CL = 0.33 µF

CONT

V

OUT

V

-5 5 2515 35

(OFF→ON)

= 10 mA, CN = 1000 pF

CL = 1.0 µF

CL = 1.5 µF

CL = 0.47 µF

45

TIME (µs)

REDUCTION OF OUTPUT NOISE

OUTPUT VOLTAGE RESPONSE

CONT

V

OUT

V

0 200 600

(OFF→ON)

CN = 0.01 µF

CN = 0.1 µF

I

LOAD

400

TIME

CL = 2.2 µF

= 30 mA

800

LOAD CURRENT STEP RESPONSE

I

= 5 to 35 mA

LOAD

30 to 60 mA

0 to 30 mA

(200 mV/DIV)

OUT

V

LOAD

I

-5 5 15 3525 45

CL = 0.33 µF

TIME( µs)

Although the architecture of the Toko regulators is 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.
A more effective solution would be to add a capacitor to the noise bypass terminal. The value of this capacitor should
be 0.1 µf or higher (higher values provide greater noise reduction). Although stable operation is possible without the noise
bypass capacitor, this terminal has a high impedance and care should be taken to avoid a large circuit area on the printed
circuit board when the capacitor is not used. Please note that several parameters are affected by the value of the
capacitors and bench testing is recommended when deviating from standard values.

April 2000 TOKO, Inc. Page 11

TK113xxBM/U

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)

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
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
the recommended mounting pad, the power dissipation of
the SOT-23L is increased to 600 mW. For operation at
ambient temperatures over 25 °C, the power dissipation of
the SOT-23L device should be derated at 4.8 mW/°C. The
power dissipation of the SOT-89 package is 900 mW when
mounted as recommended. Derate the power dissipation
at 7.2 mW/°C for operation above 25 °C. To 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:

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

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)

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

Tj = 0jA x PD + T

= (D

OUT

A

PD

/ (V

IN(MAX) - VOUT

)

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 x PD = 125 °C
0jA = 125 °C/ P

D

PD is the value when the thermal sensor is activated. A
simple way to determine PD is to calculate VIN x IIN when

Page 12 April 2000 TOKO, Inc.

TK113xxBM/U

P

(

W)

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)

750

600

450

m

D

300

150

0

0 50 100

MOUNTED AS

SHOWN

FREE AIR

TA (°C)

150

SOT23L POWER DISSIPATION CURVE

V

IN

V

OUT

++

1000

800

600

(mW)

D

400

P

200

0

0 50 100

MOUNTED AS

SHOWN

FREE AIR

TA (°C)

150

SOT89 POWER DISSIPATION CURVE

V

OUT

++

V

IN

GND

V

V

CONT

SOT23L BOARD LAYOUT

SOT89 BOARD LAYOUT

CONT

APPLICATION NOTE

Copper pattern should be as large as possible. Power dissipation is 600 mW for SOT23L and 900 mV for SOT89. A low
Equivalent Series Resistance (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.

April 2000 TOKO, Inc. Page 13

TK113xxBM/U

APPLICATION INFORMATION

INPUT-OUTPUT CAPACITORS

Linear regulators require an output capacitor in order to maintain regulator loop stability. This capacitor should be selected
to ensure stable operation over the desired temperature and load range. The graphs below show the effects of
capacitance value and ESR on the stable operation area.

V

=

OUT

113xxB

C

ESR

L

2.0 V

3.0 V

5.0 V

1000

100

10

ESR (Ω)

1

0.1

0 .01

1 50 100

CL = 1 µF

STABLE

OPERATION

AREA

I

(mA)

OUT

1

1

CL = 3.3 µF

STABLE

OPERATION

AREA

50 100 150

I

(mA)

OUT

1000

100

10

ESR (Ω)

0.1

0.01

CL = 2.2 µF

1000

100

10

ESR (Ω)

1

0.1

0.01

150

1

STABLE

OPERATION

AREA

50 100 150

I

(mA)

OUT

1000

100

10

ESR (Ω)

0.1

0.01

1

1

CL = 10 µF

STABLE

OPERATION

AREA

50

I

OUT

In general, the capacitor should be at least 1 µF (aluminum electrolytic) 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.

(mA)

100

150

ESR

Capacitance

Aluminum

Capacitor

Tantalum

Capacitor

Ceramic

Capacitor

1.0 µF 2.4Ω 2.3 Ω 0.140 Ω

2.2 µF 2.0Ω 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.

Page 14 April 2000 TOKO, Inc.

NOTES

TK113xxBM/U

April 2000 TOKO, Inc. Page 15

TK113xxBM/U

(

)

SOT23L-6

Note: Pin 2 and Pin 5 should be
grounded for heat dissipation

SOT89-5

6

Product Code

123

e e

Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm

0.49 max

6

Lot Code

Product Code

1

0.49 max

e

1.5

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

PACKAGE OUTLINE

+0.15

0.4

- 0.05

0.1

0.95

3.5

(3.4)

4.5

0.49 max

2

e'

0.95

+0.3

- 0.1

unless otherwise specified

1.6

5

3

0.54 max

e

1.5

3.0

0.49 max

0.32
5 PL

Marking

Voltage Code

+0.15

- 0.05

0.49 max

M

0.1

4

0.4

Numeric Code

1.0

1.4 max

2.5

1.5

M

1.2

0 - 0.1

1.0

+0.5

+0.15

-0.3

4.5

0.3

- 0.05

0.15

0.6

1.0

Recommended Mount Pad

0.7 max

45 °

e

1.5

Recommended Mount Pad

e

e

0.95

0.95

2.2

+ 0.3

3.3

0.7 max

1.0

2.0
e

1.5

0.44 max

0.44 max

Marking Information

Product Code Q

3.0
e1

15 max

0.4

1.5

0.70.8

0.7

1.5

Voltage Code

TK11320B 20
TK11321B 21
TK11322B 22
TK11323B 23
TK11324B 24
TK11325B 25
TK11326B 26
TK11327B 27
TK11328B 28
TK11329B 29
TK11330B 30
TK11331B 31
TK11332B 32
TK11333B 33
TK11334B 34
TK11335B 35
TK11336B 36
TK11337B 37
TK11338B 38
TK11339B 39
TK11340B 40
TK11341B 41
TK11342B 42
TK11343B 43
TK11344B 44
TK11345B 45
TK11346B 46
TK11347B 47
TK11348B 48
TK11349B 49
TK11350B 50
TK11355B 55
TK11360B 60
TK11380B 80

Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: [phone] Fax: [phone]

TOKO AMERICA REGIONAL OFFICES

Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
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Tel: [phone]
Fax: [phone]

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Toko America, Inc.
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: [phone]
Fax: [phone]

Eastern Regional Office
Toko America, Inc.
107 Mill Plain Road
Danbury, CT 06811
Tel: [phone]
Fax: [phone]

Semiconductor Technical Support
Toko Design Center
4755 Forge Road
Colorado Springs, CO 80907
Tel: [phone]
Fax: [phone]

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.

Page 16 April 2000 TOKO, Inc.

All Rights Reserved

IC-214-TK113B

0798O0.0K

Printed in the USA© 1999 Toko, Inc.