LTC2925IUF#PBF Linear Technology, LTC2925IUF#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC2925IUF#PBF
• Description: IC POWER SUPPLY CONTROLLER 24QFN
• Manufacturer: Linear Technology

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

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
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