LTC2922IF-3.3 Linear Technology, LTC2922IF-3.3 Datasheet - Page 16

• Manufacturer Part Number: LTC2922IF-3.3
• Description: IC 5 PWR SUPPLY MONITOR 20TSSOP
• Manufacturer: Linear Technology

Specifications of LTC2922IF-3.3

• Applications: Five Power Supply Monitor
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 2mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Input: -

LTC2921/LTC2922 Series
APPLICATIO S I FOR ATIO
Selecting R
low:
Similar calculations for the 2.5V supply yield suitable
standard 1% values of R
16
R
R
B MAX
0 505
B MIN
3 5475
1
1
.
.
(
(
3 0525
0 665
.
.
V
)
)
B1
V
CONVERTER
CONVERTER
CONVERTER
V
= 243k satisfies the range restrictions be-
V
49 9
DC/DC
DC/DC
DC/DC
0 1
49 9
CBRST
– . A
.
0 250
V
V
V
– .
.
0 1
OUT
V
OUT
V
OUT
V
.
.
FB
FB
FB
0 505
k
A
k
U
100k
•
•
•
CIRCUIT BREAKER
R1
5V = 7.5%
3.3V = 7.5%
2.5V = 7.5%
RESET CONTROL
V
Figure 12. Design Example of a Three-Supply Tracker and Monitor (5V, 3.3V, 2.5V)
49 9
1 0 01
1 0 01
Si1012R
1 0 01
•
1 0 01
– .
V
QRST
– .
A2
.
49 9
– .
U
0 665
k
= 49.9k and R
.
.
.
k
100
R
X2
V
244 3
100
•
•
R
W
X1
100
.
R
X0
241 6
k
B2
49.9k
.
243k
R
R
1%
1%
k
B1
A1
= 169k.
U
49.9k
169k
R
R
1%
1%
A2
B2
C
10 F
25V
BYP
1
2
3
4
9
7
5
V1
V2
V3
V4
S1
S2
S3
Tie the unused V3 and V4 monitor pins to V2 for proper
operation.
GND
V
0.05 , 1%
WSL1206
CC
LTC2921
R
11
15
R
R
R
SENSE
B MAX
0 505
B MIN
2 6875
A
2
2
2
.
.
SENSE
TIMER
(
(
2 3125
0 665
.
16
.
14
GATE
0.1 F
0.1 F
0.1 F
C
25V
C
25V
C
25V
0 500
PG
D1
D2
D3
V
C
0.22 F
10V
D0
D1
D2
10
)
TIMER
.
)
V
V
13
12
10
8
6
V
0 1
49 9
A
49 9
– .
Si2316DS
.
0 150
V
– .
.
.
0 1
Q0
.
0 505
A
k
k
R
10
R
10
R
10
50
•
•
G0
G1
G2
Q1
Si2316DS
•
Q2
Si2316DS
0.47 F
A
V
C
49 9
GATE
k
25V
1 0 01
1 0 01
•
1 0 01
– .
1 0 01
V
49 9
.
– .
– .
0 665
k
49 9
.
.
.
k
.
k
V
173 3
•
•
.
167 6
k
5V
LOAD
0.8A MAX
3.3V
LOAD
1.6A MAX
2.5V
LOAD
0.4A MAX
R2
4.7k
2921/22 F12
RESET
.
k
29212fa