TK11806
DC-DC CONVERTER
FEATURES
s
Very Small Size
s
Few External Components
s
Wide Input Supply Voltage Range (1.1 to 18 V)
s
Six Selectable Output Voltages up to 32 V
s
Single Battery Cell Operation
APPLICATIONS
s
Variable Capacitance and PIN Diode Bias
s
Portable Instrumentation
s
Radio Control Systems
s
Mobile Radios
s
Cellular Telephones
s
Cordless Telephones
s
Fiberoptic Receivers
DESCRIPTION
The TK11806 is a low power, low input voltage DC-DC
converter.
The device has been optimized for variable capacitance
diode and PIN diode bias applications. It generates DC
output voltages ranging from 9.3 V to 32 V in six steps. The
desired output voltage may be selected by simple wire
connections between control pins. The input DC voltage
can be as low as 1.1 V or as high as 18 V.
The device has a built-in relaxation oscillator. The fre-
quency of oscillation is determined by external component
values. The TK11806 has built-in voltage reference and an
array of temperature compensated zener diodes in order to
generate various output voltages with minimum external
part count.
The device is available in an 8-lead plastic surface mount
package (MFP-8).
External inductive components are also available from
TOKO.
s
Local Area Network (LAN) Receivers
s
Battery Operated Equipment
TK11806M
80621
A
V
IN
GND
1
2
8
7
6
5
OSC
DA
V
O
T3
T1 3
T2
4
BLOCK DIAGRAM
L
EXT
OSC.
ORDERING INFORMATION
TK11806M
Tape/Reel Code
S
8
V
IN
S
1
STARTUP
CIRCUIT
S
7
6
DA
V
O
5 T3
REF.
VOLTAGE
4 T2
3
2
GND
T1
OSCILLATOR
TAPE/REEL CODE
BX:
TL:
MG:
Bulk/Bag
Tape Left
Magazine
FEEDBACK
CONTROL
January, 1996 TOKO, Inc.
1-16-96
Page 1