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LTC2921IGN датащи(PDF) 18 Page - Linear Technology

номер детали LTC2921IGN
подробное описание детали  Power Supply Tracker with Input Monitors
PDF  20 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC2921IGN датащи(HTML) 18 Page - Linear Technology

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LTC2921/LTC2922 Series
18
29212fa
APPLICATIO S I FOR ATIO
∆=
Ω
Ω
Ω


=
=
∆=
Ω
Ω
Ω


=
=
∆=
Ω
Ω
Ω


=
=
VA
m
mV
of V
VA
m
mV
of
V
VA
m
mV
of
L
L
L
0
1
2
0 8
150
10
100
12
024
5
1 6
150
10
100
24
073
3 3
0 4
150
10
100
6
024
2
–.
•
•
–
–.
%
–.
•
•
–
–.
%
.
–.
•
•
–
–.
%
.5
5V
Confirm that the currents through the remote sense
switches are less than the Absolute Maximum Ratings:
The pull-down transistor Q5 on the V1 pin is a circuit
breaker reset mechanism. Choose the transistor to pull
down VV1 below the reset threshold under worst-case
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 VCC pin with a 10µF capacitor.
TYPICAL APPLICATIO S
Five-Supply Tracker and Monitor (3.3V, 2.5V, 1.8V, 1.5V, 1.2V)
2921/22 TA02
RG2
10
Ω
LTC2922-3.3
VCC
SENSE
R2
4.7k
RA4
49.9k
1%
RA3
49.9k
1%
RB4
60.4k
1%
RB3
86.6k
1%
VOUT
VFB
VOUT
VFB
VOUT
VFB
RG3
10
Ω
RG4
10
Ω
V1
V2
V3
V4
S0
S1
S2
S3
S4
GATE
PG
D0
D1
D2
D3
D4
GND
TIMER
QRST
Si1012R
CBRST
1.8V
± 5%
1.5V
± 5%
1.2V
± 5%
Q2
Si2316DS
Q3
Si2316DS
Q4
Si2316DS
RSENSE
WSL1206
0.05
Ω, 1%
CTIMER
0.22
µF
10V
1.8V
LOAD
1.6A MAX
1.5V
LOAD
1.4A MAX
1.2V
LOAD
1.2A MAX
RESET
CGATE
0.47
µF
25V
CD2
0.1
µF
25V
CD3
0.1
µF
25V
CD4
0.1
µF
25V
CBYP
10
µF
25V
DC/DC
CONVERTER
DC/DC
CONVERTER
DC/DC
CONVERTER
VOUT
VFB
VOUT
VFB
RG0
10
Ω
RG1
10
Ω
3.3V
± 10%
2.5V
± 5%
Q0
Si2316DS
Q1
Si2316DS
3.3V
LOAD
0.8A MAX
2.5V
LOAD
2.3A MAX
CD0
0.1
µF
25V
CD1
0.1
µF
25V
DC/DC
CONVERTER
DC/DC
CONVERTER
RA2
49.9k
1%
RB2
113k
1%
RA1
49.9k
1%
RB1
178k
1%
RX0
100
Ω
RX1
100
Ω
RX2
100
Ω
RX3
100
Ω
RX4
100
Ω
R1
100k
19
18
17
16
20
14
12
10
8
2
15
7
9
11
1
6
5
4
3
13
CIRCUIT BREAKER
RESET CONTROL
PG PIN AS RESET
WITH PULL-UP
TO 2.5V
IA
m
mA
IA
m
mA
IA
m
mA
DS
DS
DS
1
2
3
08
150
100
12
16
150
100
24
04
150
100
06
=
Ω
Ω


=
=
Ω
Ω


=
=
Ω
Ω


=
.•
.
.•
.
.•
.



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