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PDF TK70203MTL Data sheet ( Hoja de datos )
| Número de pieza | TK70203MTL | |
| Descripción | 1.03 V REGULATOR WITH ON/OFF SWITCH | |
| Fabricantes | TOKO | |
| Logotipo |  |
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TK702xx
1.03 V REGULATOR WITH ON/OFF SWITCH
FEATURES
s Low Input Voltage Operation (Single Battery Cell)
s Internal PNP Transistor
s Built-In Shutdown Control (Off Current, 8 µA Typ)
s Low Dropout Voltage (30 mV Typ)
s Very Small Surface Mount Package (SOT-25)
APPLICATIONS
s Pagers
s Personal Communication Equipment
s Portable Consumer Equipment
s Radio Control Systems
s Single Battery Cell Systems
DESCRIPTION
The TK702xx is a very low dropout, low input voltage
operation regulator suitable for single battery cell applica-
tions. This regulator provides 1.03 V output with a dropout
voltage of only 30 mV. The active high control provides on/
off switching of the output. In the off mode, the standby
supply current is 8 µA, thus extending battery life.
The TK702xx is available in a very small plastic surface
mount package (SOT-25).
TK702xx
SHUT DOWN 1
GND 2
GND 3
6 VIN
4 VO
ORDERING INFORMATION
TK702 M
Tape/Reel Code
VOLTAGE CODE
03 = 1.03 V
Voltage Code
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
VIN 6
SHUT
DOWN
1
BLOCK DIAGRAM
4 VO
SHUT DOWN
BANDGAP
REFERENCE
+
-
2,3 GND
TK70203 BD
January, 1996 TOKO, Inc.
1-16-96
Page 1
1 page  
APPLICATION NOTES
RECOMMENDED MOUNTING
Optimum performance can only be achieved when the IC
is mounted on a PC board according to the diagram below.
This is because of the extremely small package and limited
power dissipation. Shape the metal portion of the PCB as
shown in the following drawing.
VIN VO
GND GND
ON/ OFF or CP
T K70203•FIG1A
Use a large bypass capacitor and connect it in a place near
GND of the IC. Pay attention to temperature characteristics
of the capacitor, especially the increase of ESR and de-
crease of capacitance in low temperatures. Oscillation,
reduction of ripple rejection and increased noise may occur
in some cases if the proper capacitor is not used. An output
capacitor more than 1.0 µF is required to maintain stability.
The standard test condition is 3.3 µF (TA = 25 °C).
DROPOUT VOLTAGE
Dropout voltage is the voltage difference between the input
voltage and the output voltage where the output voltage
decreases to 100 mV below the nominal output voltage as
the input voltage is decreased.
To measure dropout voltage, set the input voltage to the
nominal output voltage +1 V and measure the output
voltage. Reduce the input voltage to the point where the
output is 100 mV below the prevoiusly measured value.
The dropout voltage is the difference between the input and
ouput voltage at this point. This voltage depends on the
load current and ambient temperature.
January, 1996 TOKO, Inc.
1-16-96
TK702xx
Page 5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet TK70203MTL.PDF ] | |
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