ADVANCED INFORMATION
TK654xx
APPLICATION INFORMATION (CONT.)
Wireless Application Extend battery life, yet keep RF clean
Application results with waveforms for TK65430 in a Buck and Linear Mode
Figure 13 is a schematic of an application board available from Toko as APO14-99 from which the results shown
below were obtained. This application uses the TK11330 Low Dropout Regulator with the control function enabling
the regulator on when this control pin is low.
LBO
OUT
SW
SB
V
GND
TK65430
Note B
100 µH
V
IN
3.0 V
100 µF
Note A: This is a low ESR
(80 mΩ) capacitor from
Note A
AVX TPSD107 M010R0080
V
IN
Control
GND
GND
TK11330
TK11330
Note B: Coil used to obtain
waveforms was D63LCB type
A921CY-101M from Toko
V
OUT
Noise
Bypass
10 µF
1000 pF
Transmit/
Receive
V
IN
FIGURE 13: BUCK AND LINEAR SCHEMATIC
V
IN
C
10 µF
GND
IN
TK654xx
1
TK113xxBM
1
CON
C
N
1000pF
D
1
Optional
875FU-xxxM
C
L
100 µF
VOUT
FIGURE 14: BUCK AND LINEAR APPLICATION BOARD LAYOUT
Page 24
September 1999 TOKO, Inc.
TOKO [ TOKO, INC ]
