LT1460HCS3-2.5 LINER [Linear Technology], LT1460HCS3-2.5 Datasheet - Page 8

• Manufacturer Part Number: LT1460HCS3-2.5
• Description: Family of Micropower Series References in SOT-23
• Manufacturer: LINER [Linear Technology]

APPLICATIONS
LT1460S3 (SOT-23)
8
V
V
V
V
V
V
V
V
V
GEN
OUT
OUT
GEN
OUT
OUT
GEN
OUT
OUT
Figure 4. I
U
Figure 3. C
Figure 2. C
INFORMATION
100 s/DIV
100 s/DIV
1 s/DIV
U
OUT
L
L
= 0.1 F
= 0 F
= 1mA
W
1460S3-5 F03
1460S3 F02
1460S3 F04
U
2.5V
1.5V
2.5V
1.5V
2.5V
1.5V
1mA
10mA
1mA
10mA
1 F
4.7 F
Table 1 gives the maximum output capacitance for various
load currents and output voltages to avoid instability. Load
capacitors with low ESR (effective series resistance) cause
more ringing than capacitors with higher ESR such as
polarized aluminum or tantalum capacitors.
Table 1. Maximum Output Capacitance
Long-Term Drift
Long-term drift cannot be extrapolated from acceler-
ated high temperature testing. This erroneous tech-
nique gives drift numbers that are widely optimistic. The
only way long-term drift can be determined is to mea-
sure it over the time interval of interest. The LT1460S3
long-term drift data was taken on over 100 parts that were
soldered into PC boards similar to a “real world” applica-
tion. The boards were then placed into a constant tempera-
ture oven with T
regularly and measured with an 8.5 digit DVM. Figure 5
shows typical long-term drift of the LT1460S3s.
VOLTAGE
OPTION
2.5V
3.3V
10V
3V
5V
–100
–150
I
– 50
150
100
OUT
50
0
>10 F
>10 F
>10 F
>10 F
>10 F
0
= 100 A
Figure 5. Typical Long-Term Drift
100
A
200
= 30 C, their outputs were scanned
300
I
OUT
400
>10 F
>10 F
>10 F
>10 F
1 F
HOURS
= 1mA
500
600
700
I
OUT
800
0.15 F
2 F
2 F
1 F
1 F
= 10mA I
1460S3 F05
900
1000
OUT
0.68 F
0.68 F
0.68 F
0.68 F
0.1 F
= 20mA