Datasheet TK70002MCB Datasheet (TOKO)

TK70002

20P

SINGLE INPUT, TWO OUTPUT SOLID STATE SWITCH

FEATURES

■ Internal PNP Power Transistor

■ Reverse Bias Voltage Protection

■ Very Low Input-Output Voltage Difference

■ Very Low Standby Current

■ Overtemperature Protection

■ Single Input with Two Controlled Outputs

■ Active High On/Off Control

DESCRIPTION

The TK70002 is a monolithic bipolar integrated circuit with
high side current switches of low saturation type. The
supply current, including the control current, is virtually
zero (pA level) when the control pin is “off”. The impedance
on the output side is high and the reverse current does not
flow when the control pin is “off.” These are effective to
decrease the dissipation currents, making the TK70002 a
very efficient device for power management and power
distribution control.

APPLICATIONS

■ Battery Powered Systems

■ Radio Control Systems

■ Automatic Test Equipment (ATE)

■ Power Management

■ Process Control Equipment

■ Power Distribution Control

TK70002

OUTPUT 1

INPUT

OUTPUT 2

CONT 1

GND

CONT 2

The TK70002 is available in a miniature SOT-23-6 surface
mount package. When mounted as recommended, this
package is capable of dissipating up to 350mW.

ORDERING INFORMATION

TK70002MCB

Tape/Reel Code

TAPE/REEL CODE

B: Tape Left

OUTPUT 2

CONT 2

BLOCK DIAGRAM

SW

CIRCUIT

BASE
CONTROL
CURRENT

INPUT

THERMAL

PROTECTION

GND

BASE
CONTROL
CURRENT

SW

CIRCUIT

OUTPUT 1

CONT 1

January 1999 TOKO, Inc. Page 1

TK70002

ABSOLUTE MAXIMUM RATINGS

Supply Voltage ......................................................... 14 V

Output Current .................................................... 130 mA

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

Control Terminal Voltage ........................................... 8 V

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

TK70002 ELECTRICAL CHARACTERISTICS

Test conditions: VIN = 2.5 V, T

LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU

= 25 °C, unless otherwise specified.

A

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

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

Operating Voltage Range............................... 1.6 to 12 V

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

I

Q

I

I
I

V
∆V

I

YBTS

TUO

DNG

PORD

D

VER

tnerruCtnecseiuQI

tnerruCybdnatS

tnerruCtuptuOV

)3etoN(tnerruCdnuorGI

egatloVtuoporDI

tnerruCsaiBesreveRV

TUO

V

NI

V

TUO

TUO

slennahCneewteBecnalaBV

NI

V0=

TNOC

PORD

V5.0=07011Am
Am05=5.25.4Am
Am05=81.053.0V

PORD

V,V0=

VER

IedulcxE,Am0=

TNOC

,FFOtuptuO,V8=

I,ecnereffid

TUO

V,V8=

TNOC

52.056.0Am

5.0001An

Am05=152Vm

V0=3.005An

LANIMRETLORTNOCFFO/NO

I

TNOC

V
V

Note 1: Power dissipation is 350 mW when mounted as recommended. Derate at 2.8 mW/°C for operation above 25 °C. Power dissipation is
Note 2: By grounding this terminal, the operation completely stops and the input current decreases to a pA level.

Note 3: Ground current is defined as IIN - I
Gen. Note: Parameters with min. or max. values are 100% tested.
Gen. Note: Exceeding the “Absolute Maximum Ratings” can damage the device.

)NO(TNOC

)FFO(TNOC

150 mW in Free Air. Derate at 1.2 mW/°C for operation above 25 °C.

tnerruClanimreTlortnoCV

TNOC

V6.1=751Aµ

)NO(egatloVlortnoCNOtuptuO2.1V

)FFO(egatloVlortnoC)2etoN(FFOtuptuO3.0V

, excluding control current. Refer to “Definition of Terms.”

OUT

Page 2 January 1999 TOKO, Inc.

TEST CIRCUIT

V

(

V)

I

(

A)

I

(

A)

INPUT

C

V

OUT 2

V

CONT 2

V

I

I

CONT 2

IN

OUT 2

C

L 2

OUTPUT 2

= 0.1 µF

R

CONT 2

I

IN

OUTPUT 1

C

CONT 1CONT 2

R

IN

0.1 µF

= 0.1 µF

L 1

CONT 1

I

CONT 1

I

OUT 1

V

CONT 1

V

OUT 1

TYPICAL PERFORMANCE CHARACTERISTICS

TK70002

CONTROL CURRENT 1

CONTROL VOLTAGE

100

80

60

( A)

R

= 0

40

CONT

I

CONT

20

0

0 2 4 6 8 10

V

(V)

CONT

DROPOUT VOLTAGE VS.

OUTPUT CURRENT

-100

m

-200

DROP

-300

0

SINGLE

VIN = 2.5 V

PARALLEL

OPERATION

OPERATION

-400

0 100 200

I

(mA)

OUT

VS.

CONTROL CURRENT 2

CONTROL VOLTAGE

V

OUT

40

30

( A)

20

CONT

I

R

10

0

0 1 2 3 4 5

V

(V)

CONT

GROUND CURRENT

OUTPUT CURRENT

10

m

5

GND

VIN = 1.0 V

1.2 V

0

0 50 100

I

(mA)

OUT

CONT

100 k

200 k

VS.

1.8 V

VS.

= 0

1.4 V

1.6 V

DROPOUT VOLTAGE

OUTPUT CURRENT

0

-100

(mV)

-200

DROP

VIN = 1.0 V

-300

V

1.2 V

-400

0 50 100

I

(mA)

OUT

REVERSE CURRENT

REVERSE VOLTAGE

2

n

1

REV

0

0 5 10 15

V

(V)

REV

VS.

1.8V

1.6 V

1.4 V

VS.

January 1999 TOKO, Inc. Page 3

TK70002

I

(

A)

OUTPUT CURRENT

TA (°C)

I

OUT

(mA)

90

140

-50 0 50 100

130

100

V

IN = 2.5 V

AT V

DROP

= 0.5 V

110

120

V

(V)

ON/OFF RESPONSE 1

TIME (µs)

0 1 0 10 20

V

CONT

C

L = 0.01 µF

I

LOAD = 30 mA

C

L = 0.1 µF

TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)

GROUND CURRENT

3

m

2

GND

0

-50 0 50 100

CONTROL VOLTAGE (V

1.0

0.5

CONT

I

TA (°C)

OUT

= 50 mA

OUT

= ON)

DROPOUT VOLTAGE

240

200

(mV)

I

DROP

V

100

-50 0 50 100

CONTROL CURRENT

10

8

(µA)

6

CONT

4

I

OUT = 50 mA

TA (°C)

V

CONT = 1.6 V

0

-50 0 50 100
TA (°C)

ON/OFF RESPONSE 2

C

L = NONE

C

L = 0.01 µF

Page 4 January 1999 TOKO, Inc.

V

CONT

0 1 2 3 4

TIME (µs)

C

L = 0.1 µF

I

LOAD = 30 mA

2

0

-50 0 50 100
TA (°C)

LOAD STEP RESPONSE

C

L = 0.1 µF

I

LOAD = 0 to 30 mA

0 4 8 12 16

TIME (µs)

100 mV/DIV

C

L = 0.01 µF

DEFINITION AND EXPLANATION OF TECHNICAL TERMS

TK70002

DROPOUT VOLTAGE (V

DROP

)

The output voltage decreases with the increase of output
current. It is dependent upon the load current and the
junction temperature. It measures the differential voltage
between the input voltage and the output voltage when the
input voltage is set to 2.5 V and the output current is set to
50 mA.

OUTPUT CURRENT (I

OUT

)

The rated output current is specified under the condition
where the output voltage drops 0.5 V below the no load
value. The input voltage is set to 2.5 V, and the current is
pulsed to minimize temperature effects.

QUIESCENT CURRENT (IQ)

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

OUT

= 0 mA)

with VIN = 2.5 V and excludes the control pin current.

STANDBY CURRENT (I

STBY

)

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

GROUND CURRENT (I

= 0 V). It is measured with VIN = 8 V.

CONT

)

GND

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

, excluding control

OUT

current.

ON/OFF CONTROL

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-23-6 is increased to 350 mW. For operation at
ambient temperatures over 25 °C, the power dissipation of
the SOT-23-6 device should be derated at 2.8 mW/°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:

Tj = 0jA x PD + T

A

High is “on” (referenced to ground). The input current is at
the pA level by connecting the control terminal to ground.

REVERSE VOLTAGE PROTECTION

Reverse voltage protection prevents damage due to the

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

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.

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.

January 1999 TOKO, Inc. Page 5

TK70002

DEFINITIONS AND TERMS (CONT.)

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

(mW)

P

D

D

PD

Procedure:

1) Find P

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

3) Plot PD1 against 25 °C

4) Connect P
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.

3

6

4

5

25 50 75 150

D

to the point corresponding to the 150 °C

D1

TA (°C)

APPLICATION INFORMATION

BOARD LAYOUT

INPUT

SOT-23-6 BOARD LAYOUT

OUTPUT 2

OUTPUT 1

GND

CONT 1

CONT 2

The maximum operating current is:

I

OUT

450

350

250

(mW)

D

150

P

50

= (D

0

/ (V

PD

IN(MAX) - VOUT

MOUNTED AS

0 50 100 150

TA (°C)

)

SHOWN

FREE AIR

SOT-23-6 POWER DISSIPATION

Page 6 January 1999 TOKO, Inc.

)

PACKAGE OUTLINE

TK70002

SOT-26 (SOT-23-6)

6

1

5

2

3

(1.9)

0.950.95

e

2.9

e

Marking Information

0.7

4

Marking

0.3

1.0

(0.6)

2.4

1

e

1.6

e

(0.6)

+

0.1

Recommended Mount Pad

M

0.1

1.1

1.4 max

0.95

e

0.95

e

1.90

0.1

+

0.15

Marking
TK70002 02S

0.1

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

0 ~ 0.1

+

0.3

2.8

0-13

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

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Toko America, Inc.
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Fax: [phone]

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Tel: [phone]
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Toko Design Center
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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.

January 1999 TOKO, Inc. Page 7

All Rights Reserved

IC-217-TK70002

0798O0.0K

Printed in the USA© 1999 Toko, Inc.