LTC1261IS8 Linear Technology, LTC1261IS8 Datasheet - Page 4

• Manufacturer Part Number: LTC1261IS8
• Description: IC VOLT INVERT SW CAP ADJ 8SOIC
• Manufacturer: Linear Technology
• Type: Switched Capacitor (Charge Pump), Invertingr

Specifications of LTC1261IS8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: -1.25 ~ -8 V
• Current - Output: 15mA
• Frequency - Switching: 550kHz
• Voltage - Input: 3 ~ 8 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LTC1261
4
TYPICAL PERFORMANCE CHARACTERISTICS
TEST CIRCUITS
–3.5
–3.6
–3.7
–3.8
–4.0
–4.1
–4.2
–4.3
–4.4
–4.5
–3.9
40
20
10
50
30
10 F
3.0
5V
Output Voltage
vs Output Current
0
Maximum Output Current
vs Supply Voltage
V
T
+
T
OUT
A
1
3.5
A
= 25 C
= 25 C
= –4V 5%
0.1 F
2
4.0
TRIPLER MODE
OUTPUT CURRENT (mA)
SUPPLY VOLTAGE (V)
3
4.5
4
5.0
1
2
3
4
5
Doubler Mode
V
DOUBLER MODE
V
C1
C1
GND
CC
CC
LTC1261-4
5.5
6
+
–
DOUBLER MODE
V
TRIPLER MODE
= 5V
CC
7
= 3.3V
6.0
COMP
SHDN
W
REG
OUT
LTC1261 • TPC04
8
LT1261 • TP01
6.5
9
8
7
6
5
U
7.0
10
+
1200
1000
3.3 F
–3.5
–3.6
–3.7
–3.8
–4.0
–4.1
–4.2
–4.3
–4.4
–4.5
–3.9
900
800
700
600
500
3.0
5.0
V
Output Voltage (Doubler Mode)
vs Supply Voltage
Supply Current
vs Supply Voltage
OUT
LTC1261 • TCO1
T
V
T
A
5.2
3.5
A
OUT
= –4V 5%
= 25 C
= 25 C
5.4
4.0
= –4V
SUPPLY VOLTAGE (V)
5.6
4.5
SUPPLY VOLTAGE (V)
TRIPLER MODE
T
5.0
5.8
A
= –40 C
5.5
6.0
T
A
= 85 C
6.0
6.2
DOUBLER MODE
6.5
6.4
7.0
6.6
LTC1261 • TPC05
LT1261 • TP02
7.5 8.0
6.8
0.1 F
0.1 F
(See Test Circuits)
7.0
2
3
4
5
Tripler Mode
C1
C1
C2
C2
–3.5
–3.6
–3.7
–3.8
–3.9
–4.0
–4.1
–4.2
–4.3
–4.4
–4.5
1200
1000
700
500
LTC1261CS
900
800
600
V
–
+
+
–
IN
–40
GND
V
3
Supply Current
vs Temperature
= 3.3V
Output Voltage (Tripler Mode)
vs Supply Voltage
CC
6
T
14
V
A
R
OUT
OUT
ADJ
= 85 C
–20
ADJ
R1
R0
T
LTC1261 • TC02
A
= –4V
= –40 C
10
9
8
7
11
4
SUPPLY VOLTAGE (V)
+
0
+
TEMPERATURE (˚C)
10 F
20
T
3.3 F
DOUBLER MODE
A
5
= 25 C
40
V
V
OUT
CC
TRIPLER MODE
60
= 5V
= –4V 5%
V
CC
6
LTC1261 • TPC03
LTC1261 • TPC06
= 3.3V
80
100
7