Datasheet

LTC1261
4
1261fb
For more information www.linear.com/LTC1261
TYPICAL PERFORMANCE CHARACTERISTICS
TEST CIRCUITS
Maximum Output Current
vs Supply Voltage
Supply Current
vs Supply Voltage
Supply Current
vs Temperature
Output Voltage
vs Output Current
Output Voltage (Doubler Mode)
vs Supply Voltage
Output Voltage (Tripler Mode)
vs Supply Voltage
(See Test Circuits)
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
–3.9
–3.7
–3.5
–3.6
–3.8
–4.0
–4.2
–4.4
8
LT1261 • TP01
–4.1
–4.3
–4.5
21 3 5 7 9
4
6
10
V
CC
= 5V
DOUBLER MODE
V
CC
= 3.3V
TRIPLER MODE
T
A
= 25°C
SUPPLY VOLTAGE (V)
5.0
OUTPUT VOLTAGE (V)
–3.9
–3.7
–3.5
–3.6
–3.8
–4.0
–4.2
–4.4
6.6
LT1261 • TP02
–4.1
–4.3
–4.5
5.45.2 5.6 6.0 6.4 6.8
5.8
6.2
7.0
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
SUPPLY VOLTAGE (V)
3
–4.5
–4.4
–4.3
–4.2
–4.1
–4.0
–3.9
–3.8
–3.7
–3.6
–3.5
OUTPUT VOLTAGE (V)
4
5
LTC1261 • TPC03
6
7
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
SUPPLY VOLTAGE (V)
3.0
10
MAXIMUM OUTPUT CURRENT (mA)
20
30
40
50
3.5 4.0 4.5 5.0
LTC1261 • TPC04
5.5 6.0 6.5 7.0
V
OUT
= –4V ±5%
T
A
= 25°C
TRIPLER MODE
DOUBLER MODE
SUPPLY VOLTAGE (V)
500
1000
600
800
SUPPLY CURRENT (µA)
700
900
1200
3.5 4.5 5.5 6.5
LTC1261 • TPC05
7.5 8.03.0 4.0 5.0 6.0 7.0
V
OUT
= –4V
T
A
= 25°C
TRIPLER MODE
DOUBLER MODE
TEMPERATURE (°C)
–40
SUPPLY CURRENT (µA)
900
1000
1200
20 60
LTC1261 • TPC06
800
700
–20 0
40 80 100
600
500
V
OUT
= –4V
V
CC
= 5V
DOUBLER MODE
V
CC
= 3.3V
TRIPLER MODE
1
2
3
4
8
7
6
5
LTC1261-4
SHDN
REG
OUT
COMP
V
CC
C1
+
C1
–
GND
0.1µF
LTC1261 • TCO1
3.3µF
V
OUT
= –4V ±5%
5V
10µF
+
+
2
3
4
5
10
9
8
7
11
ADJ
R
ADJ
R1
R0
OUT
C1
+
C1
–
C2
+
C2
–
0.1µF
LTC1261 • TC02
6
14
0.1µF
10µF
LTC1261CS
V
IN
= 3.3V
V
CC
GND
3.3µF
V
OUT
= –4V ±5%
+
+
Doubler Mode
Tripler Mode