TOKO TK70003MCB

TK70003
SINGLE OUTPUT, TWO INPUT SOLID STATE SWITCH
FEATURES
APPLICATIONS
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Internal PNP Power Transistor
Reverse Bias Voltage Protection
Very Low Input-Output Voltage Difference
Very Low Standby Current
Overtemperature Protection
Single Output with Two Controlled Inputs
Active High On/Off Control
Battery Powered Systems
Radio Control Systems
Automatic Test Equipment (ATE)
Power Management
Process Control Equipment
Power Distribution Control
DESCRIPTION
The TK70003 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 TK70003 a
very efficient device for power management and power
distribution control.
TK70003
INPUT 1
CONT 1
OUTPUT
GND
INPUT 2
CONT 2
20 P
The TK70003 is available in a miniature SOT-23-6 surface
mount package. When mounted as recommended, this
package is capable of dissipating up to 350 mW.
BLOCK DIAGRAM
ORDERING INFORMATION
OUTPUT
TK70003MCB
INPUT 2
INPUT 1
Tape/Reel Code
SW
CIRCUIT
TAPE/REEL CODE
B: Tape Left
THERMAL
PROTECTION
SW
CIRCUIT
CONT 1
CONT 2
BASE
CONTROL
CURRENT
BASE
CONTROL
CURRENT
GND
January 1999 TOKO, Inc.
Page 1
TK70003
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
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
TK70003 ELECTRICAL CHARACTERISTICS
Test conditions: VIN = 2.5 V, TA = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
IOUT = 0 mA, Exclude ICONT
0.25
0.65
mA
ISTBY
Standby Current
VIN = 8 V, Output OFF,
VCONT = 0 V
0.5
100
nA
IOUT
Output Current
VDROP = 0.5 V
IGND
Ground Current (Note 3)
IOUT = 50 mA
2.5
4.5
mA
VDROP
Dropout Voltage
IOUT = 50 mA
0.18
0.35
V
∆VD
Balance Between Channels VDROP difference, IOUT = 50 mA
1
25
mV
IREV
Reverse Bias Current
0.3
50
nA
7
15
µA
70
VIN = 0 V, VREV = 8 V, VCONT = 0 V
110
mA
ON/OFF CONTROL TERMINAL
ICONT
Control Terminal Current
VCONT = 1.6 V
VCONT(ON)
Control Voltage (ON)
Output ON (Note 4)
VCONT(OFF)
Control Voltage (OFF)
Output OFF (Note 2)
1.2
V
0.3
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 150 mW in Free Air. Derate at 1.2 mW/°C for operation above 25 °C.
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 - IOUT, excluding control current. Refer to “Definition of Terms.”
Note 4: If both input voltages are the same (parallel operation), both switches can be turned on at the same time. If the input voltages
are different, only one switch should be turned on at any given time.
Gen. Note: Parameters with min. or max. values are 100% tested.
Gen. Note: Exceeding “Absolute Maximum Ratings” can damage the device.
Page 2
January 1999 TOKO, Inc.
TK70003
TEST CIRCUIT
OUTPUT
IOUT
VOUT
CL = 0.1 µF
VIN 2
IIN 2
INPUT 1
INPUT 2
CONT 2
ICONT 2
VIN 1
IIN 1
CIN1
0.1 µF
CIN 2
0.1 µF
CONT 1
RCONT 2
RCONT 1
ICONT 1
VCONT 2
VCONT 1
TYPICAL PERFORMANCE CHARACTERISTICS
CONTROL CURRENT 1 VS.
CONTROL VOLTAGE
CONTROL CURRENT 2 VS.
CONTROL VOLTAGE
DROPOUT VOLTAGE VS.
OUTPUT CURRENT
100
0
VOUT
40
80
RCONT = 0
40
10
0
0
0
2
4
6
8
RCONT = 0
20
20
10
100 k
1.8V
-200
VIN = 1.0 V
-300
1.2 V
1.6 V
200 k
-400
1.4 V
0
1
2
3
4
5
0
50
100
VCONT (V)
VCONT (V)
IOUT (mA)
DROPOUT VOLTAGE VS.
OUTPUT CURRENT
GROUND CURRENT VS.
OUTPUT CURRENT
REVERSE CURRENT VS.
REVERSE VOLTAGE
2
10
0
VIN = 2.5 V
1.8 V
PARALLEL
OPERATION
-200
-300
1.6 V
5
SINGLE
OPERATION
IREV (nA)
-100
VDROP (mV)
30
VDROP (mV)
ICONT ( A)
60
IGND (mA)
ICONT ( A)
-100
1
1.4 V
-400
VIN = 1.0 V
1.2 V
0
100
IOUT (mA)
January 1999 TOKO, Inc.
200
0
0
0
50
IOUT (mA)
100
0
5
10
15
VREV (V)
Page 3
TK70003
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
GROUND CURRENT
OUTPUT CURRENT
DROPOUT VOLTAGE
3
140
IOUT = 50 mA
2
130
200
IOUT(mA)
VDROP (mV)
IGND (mA)
240
IOUT = 50 mA
0
50
-50
100
110
VIN = 2.5 V
AT VDROP = 0.5 V
100
100
0
-50
120
0
50
100
90
-50
0
50
TA (°C)
TA (°C)
TA (°C)
CONTROL VOLTAGE (VOUT = ON)
CONTROL CURRENT
ON/OFF RESPONSE 1
10
1.0
CL = 0.01 µF
CL = 0.1 µF
ICONT (µA)
VCONT (V)
8
0.5
6
VCONT = 1.6 V
4
2
0
-50
0
50
100
100
VCONT
ILOAD = 30 mA
0
-50
0
50
TA (°C)
ON/OFF RESPONSE 2
LOAD STEP RESPONSE
CL = NONE
CL = 0.1 µF
100
0
1
0
10
20
TIME (µs)
TA (°C)
100 mV/DIV
CL = 0.01 µF
CL = 0.1 µF
CL = 0.01 µF
VCONT
ILOAD = 0 to 30 mA
ILOAD = 30 mA
0
1
2
TIME (µs)
Page 4
3
4
0
4
8
12
16
TIME (µs)
January 1999 TOKO, Inc.
TK70003
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
DROPOUT VOLTAGE (VDROP)
PACKAGE POWER DISSIPATION (PD)
The output voltage decreases with the increase of output
current. It is dependent upon the load current and the
junction temperature. It measure 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
5 mA.
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 (VOUT x IOUT) increases (Note: both
VIN pins are connected together and both switches “on” for
this measurement). The rate of 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:
OUTPUT CURRENT (IOUT)
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 (IOUT = 0 mA)
with VIN = 2.5 V and excludes the control pin current.
STANDBY CURRENT (ISTBY)
Standby current is the current which flows into the solid
state switch when the output is turned off by the control
function (VCONT = 0 V). It is measured with VIN = 8 V.
GROUND CURRENT (IGND)
Ground current is the current which flows through the
ground pin(s). It is defined as IIN - IOUT, excluding control
current.
ON/OFF CONTROL
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
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.
January 1999 TOKO, Inc.
Tj = 0jA x PD + TA
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/ PD
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.
Page 5
TK70003
DEFINITIONS AND TERMS (CONT.)
The range of usable currents can also be found from the
graph below.
APPLICATION INFORMATION
BOARD LAYOUT
INPUT 2
OUTPUT
(mW)
3
PD
INPUT 1
6
DPD
4
GND
5
25
50
75
TA (°C)
CONT 1
150
CONT 2
Procedure:
1)
2)
3)
4)
Find PD
PD1 is taken to be PD x (~0.8 - 0.9)
Plot PD1 against 25 °C
Connect PD1 to the point corresponding to the 150 °C
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.
SOT-23-6 BOARD LAYOUT
The maximum operating current is:
IOUT = (DPD / (VIN(MAX) - VOUT)
450
MOUNTED AS
SHOWN
PD (mW)
350
250
FREE AIR
150
50
0
0
50
100
150
TA (°C)
SOT-23-6 POWER DISSIPATION
Page 6
January 1999 TOKO, Inc.
TK70003
PACKAGE OUTLINE
Marking Information
SOT-26 (SOT-23-6)
TK70003
0.7
Marking
03S
Marking
5
1.0
4
(0.6)
1.6
e 1 2.4
(0.6)
6
1
2
e
e
0.95
e
3
0.3
0.95
1.90
+ 0.1
Recommended Mount Pad
e
0.95
e 0.95
(1.9)
0.1
M
Dimensions are shown in millimeters
Tolerance: x.x = 0.2 mm (unless otherwise specified)
+ 0.1
0.15
0-13
0 ~ 0.1
0.1
1.1
1.4 max
2.9
2.8
+ 0.3
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.
© 1999 Toko, Inc.
All Rights Reserved
Page 7
IC-218-TK70003
0798O0.0K
Printed in the USA