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PDF TA2018FN Data sheet ( Hoja de datos )
| Número de pieza | TA2018FN | |
| Descripción | DC/DC CONVERTER FOR ELECTRIC TUNING (1.5V USE) | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2018FN
DC / DC Converter For Electric Tuning (1.5V USE)
TA2018FN
The TA2018FN is a DC / DC converter IC which is developed for
biasing variable capacitance diodes of tuner system. It is
especially suitable for supplying high voltage (about 14.3V) for
digital tuning (FM / TV / AM) system at low power operation.
Features
· Few external parts.
· Excellent spurious radiation by oscillation of sine wave.
· Output voltage: VO = 14.3V (typ.)
· Excellent regulatory capability of output voltage against
fluctuation of supply voltage, and of ambient
temperature.
· Built−in constant current source, it is suitable for digital
· tuning system. (ICTL can be controlled by RCTL)
· Built−in power switch.
· Low supply current (VCC = 1.2V, Ta = 25°C, IO = 30µA)
ICC = 2.1mA (typ.)
· Operating supply voltage range (Ta = 25°C)
VCC (opr) = 0.9~4V
Weight: 0.04g (typ.)
Marking
Block Diagram
1 2002-10-30
1 page  
TA2018FN
Electrical Characteristics
Unless Otherwise Specified: VCC = 1.2V, Ta = 25°C, fosc = 3MHz, IO = 30µA, SW1: a,
SW2: a
Characteristic
Supply current
Boosted output voltage
VO supply voltage
fluctuation
VO maximum output
current
VO ambient temperature
coefficient
Constant current source
output current
ICTL maximum current
Power switch on current
Power switch off voltage
Symbol
ICC1
ICC2
VO
∆VO
IO (MAX)
VO / T
Test
Cir-
cuit
Test Condition
― PW OFF, SW1: b
―
―
― VCC = 4V → 0.9V
―
∆VO = 50mV, with respect to
standard, ICTL = 30µA
―
ICTL
ICTL (MAX)
I6
V6
― IO = 0, SW2: b (RCTL = 4.7kΩ)
IO = 0, SW2: b, (adjust RCTL)
― ∆VO = 50mV, with respect to
standard, ICTL = 30µA
― VCC =0.9V, VO ≥ 13V, SW1: c
― VCC =0.9V, VO ≤ 3.5V, SW1: d
Min. Typ. Max.
―
―
13.5
-20
―
2.1
14.3
0
5
3
15.1
+20
Unit
µA
mA
V
mV
180 300
―
µA
― +1.2 ― mV / °C
80 100 120 µA
― 270 ―
5 ――
0 ― 0.3
µA
µA
V
Test Circuit
Coil Data (test circuit)
Test
Frequency
L (µH) Q
4-6
Turn
6-1 1-3 3-4
796kHz
152
25
2
1
2
8
89
1
2
Wire
(mmf)
0.04UEW
Reference
SUMIDA ELECTRIC & Co.,Ltd.
5201-018
5 2002-10-30
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet TA2018FN.PDF ] | |
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