LTC2922IF-2.5 Linear Technology, LTC2922IF-2.5 Datasheet - Page 18

• Manufacturer Part Number: LTC2922IF-2.5
• Description: IC 5 PWR SUPPLY MONITOR 20TSSOP
• Manufacturer: Linear Technology

Specifications of LTC2922IF-2.5

• Applications: Five Power Supply Monitor
• Voltage - Supply: 2.37 V ~ 2.63 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
Confirm that the currents through the remote sense
switches are less than the Absolute Maximum Ratings:
18
TYPICAL APPLICATIO S
V
V
V
L
L
L
0
2
1
– .
– . %
– .
– . %
– .
– . %
CBRST
CONVERTER
CONVERTER
CONVERTER
CONVERTER
CONVERTER
0 8
0 24
1 6
0 73
0 4
0 24
DC/DC
DC/DC
DC/DC
DC/DC
DC/DC
V
V
V
V
V
A
A
100k
A
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
CIRCUIT BREAKER
RESET CONTROL
FB
FB
FB
FB
FB
R1
•
•
•
Si1012R
150
150
150
U
3.3V 10%
2.5V 5%
1.8V 5%
1.5V 5%
1.2V 5%
QRST
of V
of
of
5
3 3
2
m
m
m
.
.5 5 V
U
V
•
•
•
100
R
100
X4
100
100
R
100
10
10
100
10
X3
Five-Supply Tracker and Monitor (3.3V, 2.5V, 1.8V, 1.5V, 1.2V)
R
100
X2
R
U
100
X1
W
R
X0
49.9k
178k
R
1%
R
1%
–
B1
–
–
A1
24
12
6
mV
49.9k
113k
mV
mV
R
1%
R
1%
B2
A2
U
86.6k
49.9k
R
1%
R
1%
B3
A3
60.4k
49.9k
R
R
1%
1%
B4
A4
C
10 F
25V
BYP
0.05 , 1%
13
11
WSL1206
3
4
5
6
1
9
7
The pull-down transistor Q5 on the V1 pin is a circuit
breaker reset mechanism. Choose the transistor to pull
down V
conditions, and choose a gate-grounding resistor based
on speed and current considerations. The Vishay Siliconix
Si1012R and a 100k resistor proved sufficient for this
design. Finally, bypass the V
R
SENSE
V1
V2
V3
V4
S0
S1
S2
S3
S4
I
I
I
DS
DS
GND
DS
LTC2922-3.3
V
CC
15
19
2
3
1
SENSE
TIMER
V1
18
2
1 6
0 8
0 4
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
GATE
25V
25V
25V
25V
25V
C
C
C
C
C
PG
C
0.22 F
10V
.
below the reset threshold under worst-case
D0
D1
D2
D3
D4
.
.
D0
D1
D2
D3
D4
TIMER
A
A
A
17
16
20
14
12
10
8
•
•
•
150
150
150
100
100
100
R
10
R
10
R
10
R
10
R
10
G0
G1
G2
G3
G4
Q0
Si2316DS
Q1
Si2316DS
Q2
Si2316DS
Q3
Si2316DS
Q4
Si2316DS
0.47 F
C
GATE
m
25V
m
m
CC
1 2
2 4
0 6
pin with a 10 F capacitor.
.
.
.
2921/22 TA02
mA
mA
mA
PG PIN AS RESET
WITH PULL-UP
R2
4.7k
TO 2.5V
3.3V
LOAD
0.8A MAX
2.5V
LOAD
2.3A MAX
1.8V
LOAD
1.6A MAX
1.5V
LOAD
1.4A MAX
1.2V
LOAD
1.2A MAX
RESET
29212fa