LTC1144IS8#PBF Linear Technology, LTC1144IS8#PBF Datasheet - Page 8

• Manufacturer Part Number: LTC1144IS8#PBF
• Description: IC VOLT CONV SW-CAP W/SHTDN8SOIC
• Manufacturer: Linear Technology
• Type: Switched Capacitor (Charge Pump), Invertingr

Specifications of LTC1144IS8#PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Current - Output: 50mA
• Frequency - Switching: 4kHz ~ 10kHz
• Voltage - Input: 2 ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 500mW
• Primary Input Voltage: 18V
• No. Of Outputs: 1
• Output Voltage: -18V
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Power Dissipation Pd: 500mW
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

PACKAGE
LTC1144
Regulated –5V Output Voltage
Figure 12 shows a regulated –5V output with a 9V input.
With a 0mA to 5mA load current, the R
Paralleling for Lower Output Resistance
Additional flexibility of the LTC1144 is shown in Figure 13.
Two LTC1144s are connected in parallel to provide a lower
effective output resistance. However, if the output resis-
tance is dominated by 1/(f C1), increasing the capacitor
size (C1) or increasing the frequency will be of more
benefit than the paralleling circuit shown.
8
TYPICAL
8-Lead Plastic SOIC
8-Lead Plastic DIP
N8 Package
S8 Package
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
[phone]
A
PPLICATI
DESCRIPTION
10 F
FAX
C1
: [phone]
(0.203 – 0.254)
0.008 – 0.010
+
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
(0.254 – 0.508)
0.010 – 0.020
(7.620 – 8.128)
(0.229 – 0.381)
0.300 – 0.320
0.009 – 0.015
O
0.325
8.255
1
2
3
4
+0.635
–0.381
U
+0.025
–0.015
TELEX
0.016 – 0.050
0.406 – 1.270
S
Figure 13. Paralleling for Lower Output Resistance
U
LTC1144
: 499-3977
45
OUT
Dimemsions in inches (millimeters) unless otherwise noted.
is below 20 .
0°– 8° TYP
8
7
6
5
(1.143 ± 0.381)
0.045 ± 0.015
(1.651)
0.065
TYP
10 F
(2.540 ± 0.254)
C1
0.100 ± 0.010
(1.346 – 1.752)
0.053 – 0.069
(0.355 – 0.483)
0.014 – 0.019
+
(1.143 – 1.651)
0.045 – 0.065
1
2
3
4
1/4 CD4077*
LTC1144
1 F
+
(0.457 ± 0.076)
0.018 ± 0.003
Figure 12. A Regulated – 5V Supply
(1.270)
(3.302 ± 0.127)
0.050
0.130 ± 0.005
(0.101 – 0.254)
BSC
0.004 – 0.010
(3.175)
0.125
MIN
8
7
6
5
* THE EXCLUSIVE NOR GATE
SYNCHRONIZES BOTH LTC1144s
TO MINIMIZE RIPPLE
V
1
2
3
4
+
(0.508)
0.020
MIN
LTC1144
(5.791 – 6.197)
0.228 – 0.244
+
C2
20 F
LINEAR TECHNOLOGY CORPORATION 1994
V
OUT
8
7
6
5
8
1
1144 F13
= –(V
8
1
9V
LT/GP 0494 10K • PRINTED IN USA
2
(4.801 – 5.004)
(10.160)
7
0.189 – 0.197
0.400
+
MAX
7
2
)
6
+
3
36k
300k
6
100 F
3
4
5
2N2369
1144 F12
– 5V
5
4
(6.350 ± 0.254)
(3.810 – 3.988)
0.250 ± 0.010
0.150 – 0.157