LTC2925IUF#PBF Linear Technology, LTC2925IUF#PBF Datasheet - Page 7
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LTC2925IUF#PBF
Manufacturer Part Number
LTC2925IUF#PBF
Description
IC POWER SUPPLY CONTROLLER 24QFN
Manufacturer
Linear Technology
Datasheet
1.LTC2925CGN.pdf
(24 pages)
Specifications of LTC2925IUF#PBF
Applications
Power Supply Controller
Voltage - Supply
2.9 V ~ 5.5 V
Current - Supply
1.5mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-QFN
Voltage Supervisor Type
Power Supply Tracker
Number Of Voltage Supervisors
4
Operating Supply Voltage (min)
2.9V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Industrial
Operating Temp Range
-40C to 85C
Pin Count
24
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
SCTMR (Pin 24/Pin 21): Circuit Breaker Timer. A capacitor
from SCTMR to GND programs the maximum time that a
short circuit can be sustained before GATE is pulled low.
When (SENSEP – SENSEN) > 50mV, SCTMR will pull up
with 50μA, otherwise it pulls down with 2μA. When the
voltage at SCTMR exceeds 1.23V, the GATE will be pulled
to ground with 20mA and the FAULT pin will be pulled low.
BLOCK DIAGRAM
PIN FUNCTIONS
(11)
(12)
(21)
(19)
(20)
(14)
(18)
(1)
(9)
(6)
12
14
15
24
22
23
17
21
4
9
TRACK3
TRACK2
TRACK1
SCTMR
PGI
PGTMR
ON
RAMPBUF
REMOTE
STATUS
10μA
V
GN/UF Packages
CC
SCTMR
1.2V
1.2V
0.1V
0.4V
1.2V
Pin numbers in parentheses are for the UF package.
ONSIG
+
–
–
+
–
+
+
–
+
–
1×
V
CC
S
R
50μA
2μA
Q
0.1V
+
–
2.6V
V
CC
V
V
10
+
–
CC
CC
1
S
R
–
+
(22)
GND
(7, 25)
The circuit breaker function is reset by pulling ON below
0.4V. The GATE pin will not rise again until SCTMR has
been pulled below 100mV by the 2μA current source. If
FAULT is tied back to ON the system will automatically
retry after a fault. Tie SCTMR to GND if the circuit breaker
is not used.
0.8V
Q
GATE > RAMP + 4.9V
4.9V
+
–
V
GATE
CHARGE
CC
PUMP
10μA
10μA
10μA
SENSEP > SENSEN + 50mV
V
CC
50mV
–
+
1.2V
SENSEP
SENSEN
SDTMR
FAULT
RAMP
GATE
SDx
FB3
FB2
FB1
11
13
16
20
19
18
2
3
5
2925 FBD
(8)
(10)
(13)
(23)
(24)
(17)
(16)
(2)
(15)
LTC2925
2925fc
7