+
LT1026
Voltage Converter
FEATURES
DESCRIPTIO
n
Generates + and from Single Input The LT 1026 is a switched capacitor voltage doubler and
n
Up to 18V Output inverter on a single monolithic die. Capable of operating
n
Only Needs Four 1m F Capacitors from a 4V to 10V input, it provides 7V to 18V output.
n
No Inductors Output currents of over 10mA are available. Two charge
n
10mA Output Current Minimum pumps first double the input voltage then invert the
n
Operates Down to 4V doubled voltage. Manufactured in bipolar technology, the
n
No Latchup LT1026 is not susceptible to latchup and generates up to
n
8-Pin Minidip 36V.
U
The LT1026 offers a convenient way of generating addi-
APPLICATIO S
tional system voltages without using inductors. Powering
interface circuits, op amps or data acquisition circuitry off
n
Line Drivers
logic supplies is simplified.
n
Op Amp Suppliers
, LTC and LT are registered trademarks of Linear Technology Corporation.
n
Battery Splitters
n
RS232 Power
TYPICAL APPLICATIO
Output Voltage
Voltage Doubler and Inverter
C1
10
1F
C = 1F
8
V = 5V
IN
6 T = 25C
A
4
1 8
C1 +V +V
OUT
OUT
2
2 7
+ +
1F
C2 C1 0
C2
LT1026
6
3 2
1F
V
C2 V
IN IN
4
5
4
V
OUT V GND
OUT
6
1F 8
10
1026 TA01
0 5 10 15 20 25
LOAD CURRENT (mA)
LT1026 TA02
1026fb
1
OUTPUT VOLTAGE (V)
+
+
+
U
ULT1026
(Note 1)
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ........................................................ 10V Operating Temperature Range
+
V ............................................................................ 20V LT1026C ................................................. 0 C to 70 C
V ..........................................................................20V LT1026I .............................................. 40 C to 85 C
Short-Circuit Duration ......................................... 10 sec LT1026M (OBSOLETE) ............... 55 C to 125 C
Lead Temperature (Soldering, 10 sec)................. 300 C
PACKAGE/ORDER INFORMATION
TOP VIEW
TOP VIEW
+V TOP VIEW
OUT
8
1 8
C1 +V
OUT
+
C1 1 8 +V
1 C1 OUT
C1 7
+ +
C2 2 7 C1
+ +
C2 2 7 C1
+
C2 2 6
V
IN C2 3 6 V
IN
C2 3 6 V
IN
V 4 5 GND
3 5 OUT
GND
C2 V 4 5 GND
OUT
4
N8 PACKAGE S8 PACKAGE
V
OUT
J8 PACKAGE
8-LEAD PDIP 8-LEAD PLASTIC SO
8-LEAD CERDIP
H PACKAGE
8-LEAD TO-5 METAL CAN T = 150 C, q = 100 C/W (N8)
JMAX JA
T = 150 C, q = 150 C/W
JMAX JA
T = 150 C, q = 150 C/W (S8)
JMAX JA
T = 150 C, q = 150 C/W
JMAX JA
ORDER PART ORDER PART ORDER PART S8 PART
NUMBER NUMBER NUMBER MARKING
LT1026CN8 1026
LT1026CH LT1026CJ8
LT1026CS8 1026I
LT1026MH LT1026MJ8
LT1026IS8
OBSOLETE PACKAGES
Consider the N8 or S8 Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The l denotes the specifications which apply over the full operating
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T = 25 C.
A
PARAMETERS CONDITIONS MIN TYP MAX UNITS
Output Voltage V = 4V I = 0mA Positive l 6.5 7 V
IN L
(Note 2) I = 0mA Negative l 6 6.7 V
L
I = 10mA Positive l 5.25 5.7 V
L
I = 10mA Negative l 4.5 5 V
L
V = 5V I = 15mA Positive l 6.25 7 V
IN L
I = 15mA Negative l 5.5 6.2 V
L
V = 10V I = 0mA Positive l 18 18.5 V
IN L
I = 0mA Negative l 17.7 18 V
L
I = 10mA Positive l 16 17.6 V
L
I = 10mA Negative l 15.3 17 V
L
I = 15mA Positive l 15.25 17 V
L
I = 15mA Negative l 14.5 16.5 V
L
V = 5V I = 10mA, 10mA Positive l 6.25 7.2 V
IN L
Negative l 5.5 6.5 V
V = 10V I = 10mA, 10mA Positive l 15 16.8 V
IN L
Negative l 14.25 15.75 V
1026fb
2
UW U
U W W W