TAR8D08K
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TAR8D08K
Dual Low-Dropout Regulator
TAR8D08K is a bipolar type 2-output power supply with a
control pin. ON and OFF can be switched using the control pin.
Features
•
•
•
•
Include 2-LDO regulators. (2.8V, 2.85V)
Output power supply can be independent control.
Overtemperature/overcurrent protection.
Very small 8-pin package.
Weight: 0.01 g (typ.)
Pin Assigment
(top view)
V
OUT
(A)
8
V
IN
7
V
OUT
(B) CONT (B)
6
5
V
OUT
(A)
=
2.8 V
V
OUT
(B)
=
2.85 V
1
2
3
4
NOISE (A) NOISE (B) CONT (A) GND
Marking
8D08
Overtemperature protection and overcurrent protection function are not necessary of operating ratings below the
absolute maximum ratings.
Do not use device under conditions in which their absolute maximum ratings will be exceeded.
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2007-11-01
TAR8D08K
Absolute Maximum Ratings
(Ta
=
25°C)
Characteristics
Supply Voltage
Output Current (V
OUT
(A) )
Output Current (V
OUT
(B) )
Power Dissipation
Operation Temp Range
Storage Temp Range
Symbol
V
IN
I
OUT
(A)
I
OUT
(B)
P
D
T
opr
T
stg
Rating
15
100
200
400
−40~85
−55~150
(Note 1)
(Note 2)
Unit
V
mA
mW
°C
°C
Note:
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
2
Note 1: Unit Rating
Note 2: Mounted on a glass epoxy circuit board of 30 mm
×
30 mm Pad dimansion of 70 mm
Electrical Characteristics
(unless otherwise specified, V
IN
=
V
OUT
(B)
+
1 V, I
OUT
=
30 mA,
C
IN
=
1
μF,
C
OUT
=
10
μF,
C
NOISE
=
0.01
μF,
T
j
=
25°C)
2.8 V output Characteristics
(V
OUT
(A))
Characteristics
Output Voltage
Dropout Voltage
Input Voltatge
Load Regulation
Line Reguration
Temp. Coeffcient
Ripple Rejection
Output Noise Voltage
Symbol
V
OUT
V
IN
-V
OUT
V
IN
Reg½load
Reg½line
T
CVO
R.R
V
NO
I
OUT
=
0 mA~30 mA
V
IN
=
3.8 V~15.0 V
Ta
= −40°C~85°C
I
OUT
=
10 mA, f
=
1 kHz,
V
Ripple
=
500 mV
p-p
, Ta
=
25°C
I
OUT
=
10 mA,
10 Hz
<
f
<
10 kHz, Ta
=
25°C
= =
Test Condition
I
OUT
=
30 mA
I
OUT
=
30 mA
V
OUT
+
0.18 V
Min
2.73
Typ
2.8
120
⎯
2
3
100
70
30
Max
2.87
180
15
12
15
V
mV
mV
ppm/°C
dB
μV
rms
Unit
V
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
2.85 V output Characteristics
(V
OUT
(B) )
Characteristics
Output Voltage
Dropout Voltage
Input Voltatge
Load Regulation
Line Reguration
Temp. Coeffcient
Ripple Rejection
Output Noise Voltage
Symbol
V
OUT
V
IN
-V
OUT
V
IN
Reg½load
Reg½line
T
CVO
R.R
V
NO
I
OUT
=
0 mA~30 mA
V
IN
=
3.85 V~15.0 V
Ta
= −40°C~85°C
I
OUT
=
10 mA, f
=
1 kHz,
V
Ripple
=
500 mV
p-p
, Ta
=
25°C
I
OUT
=
10 mA,
10 Hz
<
f
<
10 kHz, Ta
=
25°C
= =
Test Condition
I
OUT
=
30 mA
I
OUT
=
30 mA
V
OUT
+
0.18 V
Min
2.77
Typ
2.85
120
⎯
2
3
100
70
30
Max
2.93
180
15
12
15
V
mV
mV
ppm/°C
dB
μV
rms
Unit
V
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
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2007-11-01
TAR8D08K
Common Characteristics
Characteristics
Stand-by Current
Symbol
I
B (OFF)
I
B1
Quiescent Current
I
B2
Control Voltage (ON)
Control Voltage (OFF)
Control Input Current
V
CT (ON)
V
CT (OFF)
I
CT
V
CT
=
0 V
I
OUT
(A)
=
0 mA,
I
OUT
(B)
=
0 mA
I
OUT
(A)
=
30 mA,
I
OUT
(B)
=
30 mA
Test Condition
Min
Typ
Max
1
700
1800
V
IN
0.4
15
Unit
μA
μA
μA
V
V
μA
⎯
⎯
⎯
1.5
⎯
350
850
⎯
⎯
V
CT
=
1.5 V (output ON)
⎯
⎯
⎯
⎯
⎯
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2007-11-01
TAR8D08K
Application Note・ Recommended Application circuit
V
OUT
(A)
10
μF
V
IN
10
μF
7
6
V
OUT
(B) COUT (B)
8
1
μF
5
Control level
HIGH
LOW
1
0.01
μF
0.01
μF
2
3
4
A-channel
ON
OFF
B-channel
ON
OFF
NOISE (A) NOISE (B) CONT (A)
GND
The noise capacitor should be connected to NOISE pin
to GND for stable operation.
The recommended value is higher than 0.0047μF.
The figure above shows commended configuration for using a point regulator. Insert a capacitor for stable
input/output operation.
If the control function is not to be used, Toshiba recommended that the control pin be connected to the
V
CC
pin.
・
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2007-11-01
TAR8D08K
Ripple Rejection
TAR8D08K feature a circuit with an excellent ripple rejection characteristic. Because the circuit also
features an excellent output fluctuation characteristic for sudden supply voltage drops, the circuit is ideal for
in the RF blocks incorporated in all mobile telephones.
Ripple Rejection
−
f
80
70
Input Transient Responce V
OUT(A)
(dB)
60
50
40
30
20
10
0
10
10
μF
2.2
μF
1
μF
Input Voltage
3.4 V
3.1 V
Ripple Rejection
2.8 V
Output voltage
VIN
=
3.85 V, CNOISE
=
0.01
μF,
CIN
=
1
μF,
Vripple
=
500 mVp
−
p,
Iout
=
10 mA, Ta
=
25°C
100
1k
10 k
100 k 300 k
0
1
2
3
4
Ta
=
25°C, CIN
=
1
μF,
Cout
=
10
μF,
CNOISE
=
0.01
μF,
VIN: 3.4 V
→
3.1 V, Iout
=
30 mA
5
6
7
8
9
10
Frequency f
(Hz)
time
t
(ms)
Input Transient Responce V
OUT(B)
3.45 V
3.15 V
Input Voltage
2.85 V
Output voltage
Ta
=
25°C, CIN
=
1
μF,
Cout
=
10
μF,
CNOISE
=
0.01
μF,
VIN: 3.45 V
→
3.15 V, Iout
=
30 mA
0
1
2
3
4
5
6
7
8
9
10
time
t
(ms)
NOISE Pin
TAR8D08K device incorporate a NOISE pin to reduce output noise voltage. Inserting a capacitor between
the NOISE pin and GND reduces output noise. To ensure stable operation, insert a capacitor of 0.0047
μF
or
more between the NOISE pin and GND.
C
NOISE
−
V
N
60
CIN
=
1
μF,
Cout
=
10
μF,
(μV)
50
Iout
=
10 mA, Ta
=
25°C
V
N
Output noise voltage
40
30
20
10
0
0.001
μ
0.01
μ
0.1
μ
1.0
μ
NOISE capacitance
C
NOISE
(F)
5
2007-11-01
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