TA4800AF
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA4800AF
1 A Output Current Low Dropout Voltage Regulator
The TA4800AF consists of small-surface mount type low-dropout
regulators with an output current of 1 A (maximum). The output
voltage can be arbitrarily set by external resistance.
Features
•
•
•
•
•
•
•
•
Maximum output current
Output voltage
Low quiescent current
Low-dropout voltage
Protection function
Package type
:1A
: V
OUT
= 1.5 V to 9.0 V
: 850
μA
(typ.) (@V
OUT
= 3.3 V, I
OUT
= 0 A)
: V
D
= 0.5 V (max) (@V
OUT
= 3.3 V, I
OUT
= 500 mA)
: Overcurrent protection / overheating protection
: Surface-mount 5-pin New PW-Mold
HSIP5-P-1.27B
Weight : 0.36 g (typ.)
Reference voltage accuracy : V
REF
± 2.5% (@Tj = 25°C)
Low standby current (output OFF mode): 0.5
μA
(typ.)
Pin Assignment
Mark
1
NC
2
3
4
5
IN GND OUT ADJ
1
2009-09-30
TA4800AF
Marking
3
4800
AF
1 2 3 4 5
Part No. (or abbreviation code)
Lot No.
Note 1
Note 1: A line under a Lot No. identifies the indication of product Labels.
Not underlined: [[Pb]]/INCLUDES > MCV
Underlined: [[G]]/RoHS COMPATIBLE or [[G]]/RoHS [[Pb]]
Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS
compatibility of Product. The RoHS is the Directive 2002/95/EC of the European Parliament and of the Council of 27
January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment.
The product(s) in this document (“Product”) contain functions intended to protect the Product from
temporary small overloads such as minor short-term overcurrent or overheating. The protective
functions do not necessarily protect Product under all circumstances. When incorporating Product into
your system, please design the system (1) to avoid such overloads upon the Product, and (2) to shut
down or otherwise relieve the Product of such overload conditions immediately upon occurrence. For
details, please refer to the notes appearing below in this document and other documents referenced in
this document.
Pin Description
Pin No.
1
2
3
4
5
Symbol
NC
IN
GND
OUT
ADJ
Non-connection
Input terminal. Connected by capacitor (C
IN
) to GND.
Ground terminal
Output terminal. Connected by capacitor (C
OUT
) to GND.
Output voltage feedback to regulator. It is connected to an error amplifier with
V
REF
=1.245 V (typ.).
Description
How to Order
Product No.
TA4800AF (T6L1,Q)
Package
5-pin New PW-Mold : Surface-mount
Package Type and Capacity
Tape (2000 pcs/reel)
Block Diagram
IN
Over-current
protection
OUT
Over-
temperature
protection
Control
circuit
Reference
voltage
1.245 V (Typ.)
ADJ
GND
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TA4800AF
Absolute Maximum Rating
(Ta
=
25°C)
Characteristic
Input voltage
Output current
Operating junction temperature
Junction temperature
Storage temperature
Power dissipation
Thermal
resistance
Ta
=
25°C
Tc
=
25°C
junction-ambient
junction-case
Symbol
V
IN
I
OUT
T
jopr
T
j
T
stg
P
D
R
th(j-a)
R
th(j-c)
Rating
16
1
-40 to 150
150
−55
to 150
1
10
125
12.5
Unit
V
A
°C
°C
°C
W
°C/W
Note 2: Do not apply current and voltage (including reverse polarity) to any pin that is not specified.
Note 3: 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).
Operating Input Voltage Range
Characteristic
Input voltage
Symbol
V
IN
Min
2.5 (Note 4)
Typ.
⎯
Max
16.0
Unit
V
Note 4: This is the voltage at which the IC begins operating. V
D
must be considered when determining the best
input voltage for the application.
Output Voltage Range
Characteristic
Output voltage
Symbol
V
OUT
Min
1.5
Typ.
⎯
Max
9.0
Unit
V
Protection Function
(Reference)
Characteristic
Thermal shutdown
Thermal shutdown hysteresis width
Peak circuit current
Symbol
T
SD
T
SD(hys)
I
PEAK
V
IN
=
4.3 V
V
IN
=
5.3 V, T
j
=
25°C
V
IN
=
8.3 V, T
j
=
25°C
V
IN
=
5.3 V, T
j
=
25°C
V
IN
=
16V , T
j
=
25°C
Test Condition
Min
150
⎯
⎯
⎯
⎯
⎯
Typ.
170
15
1.7
2.0
1.1
0.7
Max
⎯
⎯
⎯
⎯
⎯
⎯
Unit
°C
°C
A
Short circuit current
I
SC
A
Note 5: Ensure that the devices operate within the limits of the maximum rating when in actual use.
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TA4800AF
Electrical Characteristics
Characteristic
Reference voltage
Line regulation
Load regulation
(Unless otherwise specified, V
EN
=
V
IN
, V
OUT
=
3.3 V, C
IN
=
0.33
μF,
C
OUT
=
3.3
μF,
T
j
=
25°C)
Symbol
V
REF
Reg½line
Reg½load
V
IN
=
4.3 V
4.3 V
≤
V
IN
≤
8.3 V,
I
OUT
=
500 mA
V
IN
=
4.3 V, 5 mA
≤
I
OUT
≤
1 A
4.3 V
≤
V
IN
≤
8.3 V,
I
OUT
=
0 A
4.3 V
≤
V
IN
≤
8.3 V,
I
OUT
=
1 A
V
IN
=
2.1 V, I
OUT
=
0 A
V
IN
=
3.5 V, I
OUT
=
1 A
V
IN
=
5.3 V, I
OUT
=
50 mA,
10 Hz
≤
f
≤
100 kHz
V
IN
=
5.3 V, I
OUT
=
50 mA,
f
=
120 Hz
I
OUT
=
500 mA
I
OUT
=
1 A
V
IN
=
5.3 V, I
OUT
=
5 mA,
0°C
≤
T
j
≤
125°C
Test Condition
Min
1.214
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Typ.
1.245
8
5
0.85
10
3.3
17.0
100
63
0.32
0.69
0.3
Max
1.276
24
20
1.70
mA
20
4.0
28.5
⎯
⎯
0.50
⎯
⎯
mA
μV
rms
dB
V
mV/°C
Unit
V
mV
mV
Quiescent current
I
B
Starting quiescent current
Output noise voltage
Ripple rejection
Dropout voltage
Average temperature
coefficient of output voltage
I
Bstart
V
NO
R.R.
V
D
T
CVO
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2009-09-30
TA4800AF
Electrical Characteristics Common to All Products
•
T
j
=
25°C in the measurement conditions of each item is the standard condition when a pulse test is carried
out, and any drift in the electrical characteristic due to a rise in the junction temperature of the chip may be
disregarded.
Standard Application Circuit
C
IN
0.33
μF
IN
OUT
TA4800AF
GND
ADJ
R2
R1
C
OUT
3.3
μF
Load
•
Be sure to connect a capacitor near the input terminal and output terminal between both terminals and GND.
The use of a monolithic ceramic capacitor (B Characteristic or X7R) of low ESR (equivalent series resistance)
is recommended. The IC may oscillate due to external conditions (output current, temperature, or the type of
the capacitor used). The type of capacitor required must be determined by the actual application circuit in
which the IC is used.
Setting Output Voltage
•
The output voltage is determined by the equation shown below. When you control the output voltage with R1,
a recommended value to use for R2 is 5 kΩ. R1 and R2must be placed as close as possible to each other, and
the board trace to the ADJ terminal must be kept as short as possible.
R1
VOUT = VREF × ( 1 +
)
R2
Usage Precautions
•
The IC might be destroyed if a voltage greater than the input terminal voltage is applied to the output
terminal, or if the input terminal is connected to GND during operation. To prevent such an occurrence,
connect a diode as in the following diagram.
C
IN
0.33
μF
IN
OUT
TA4800AF
GND
ADJ
R2
R1
C
OUT
3.3
μF
Load
•
There is a possibility that internal parasitic devices may be generated when momentary transients cause a
terminal’s potential to fall below that of the GND terminal. In such case, that the device could be destroyed.
The voltage of each terminal and any state must therefore never fall below the GND potential.
•
Low voltage
Do not apply voltage to the Product that is lower than the minimum operating voltage, or the Product’s
protective functions will not operate properly and the Product may be permanently damaged.
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2009-09-30
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