LT1026
Voltage Converter
FEATURES
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DESCRIPTIO
Generates + and – from Single Input
Up to
±18V
Output
Only Needs Four 1µF Capacitors
No Inductors
10mA Output Current Minimum
Operates Down to 4V
No Latchup
8-Pin Minidip
The LT
®
1026 is a switched capacitor voltage doubler and
inverter on a single monolithic die. Capable of operating
from a 4V to 10V input, it provides
±7V
to
±18V
output.
Output currents of over 10mA are available. Two charge
pumps first double the input voltage then invert the
doubled voltage. Manufactured in bipolar technology, the
LT1026 is not susceptible to latchup and generates up to
36V.
The LT1026 offers a convenient way of generating addi-
tional system voltages without using inductors. Powering
interface circuits, op amps or data acquisition circuitry off
logic supplies is simplified. Other Linear Technology
voltage converters such as the low power LTC
®
1044
CMOS and 100mA bipolar LT1054 are available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIONS
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Line Drivers
Op Amp Suppliers
Battery Splitters
RS232 Power
TYPICAL APPLICATION
Voltage Doubler and Inverter
C1
1µF
10
8
6
C = 1µF
V
IN
= 5V
T
A
= 25°C
OUTPUT VOLTAGE (V)
1
2
C2
1µF
–V
OUT
C1
–
C2
+
LT1026
C2
–
–V
OUT
+V
OUT
C1
+
V
IN
GND
8
7
6
5
V
IN
4
2
0
–2
–4
–6
–8
–10
+
+V
OUT
1µF
+
3
4
1µF
1026 • TA01
0
U
Output Voltage
5
15
20
10
LOAD CURRENT (mA)
25
LT1026 • TA02
U
U
+
+
1
LINER [ LINEAR TECHNOLOGY ]
