LTC2925 Datasheet, PDF (2/20 Pages) Linear Technology – Multiple Power Supply Tracking Controller with Power Good Timeout

LTC2925
ABSOLUTE AXI U RATI GS
(Notes 1, 2)
Supply Voltage (V_CC) ................................. –0.3V to 10V
Input Voltages
ON, PGI, SENSEP, SENSEN ..................... –0.3V to 10V
TRACK1, TRACK2, TRACK3 .......... –0.3V to V_CC + 0.3V
SCTMR, SDTMR, PGTMR ............. –0.3V to V_CC + 0.3V
Output Voltages
FAULT, SD1, SD2, SD3,
FB1, FB2, FB3, STATUS ......................... –0.3V to 10V
RAMPBUF, REMOTE ..................... –0.3V to V_CC + 0.3V
RAMP .............................................. –0.3V to V_CC + 1V
GATE (Note 3) ........................................ –0.3 to 11.5V
Average Current
TRACK1, TRACK2, TRACK3 .................................. 5mA
FB1, FB2, FB3 ....................................................... 5mA
Operating Temperature Range
LTC2925C ............................................... 0°C to 70°C
LTC2925I ............................................. –40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Package ..................................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V_CC 1
SENSEP 2
SENSEN 3
ON 4
SDTMR 5
SD1 6
SD2 7
SD3 8
RAMPBUF 9
GND 10
FB3 11
TRACK3 12
24 SCTMR
23 PGTMR
22 PGI
21 STATUS
20 FAULT
19 GATE
18 RAMP
17 REMOTE
16 FB1
15 TRACK1
14 TRACK2
13 FB2
GN PACKAGE
24-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 85°C/W
ORDER PART
NUMBER
LTC2925CGN
LTC2925IGN
GN PART
MARKING
LTC2925CGN
LTC2925IGN
TOP VIEW
24 23 22 21 20 19
ON 1
SDTMR 2
SD1 3
SD2 4
SD3 5
RAMPBUF 6
18 STATUS
17 FAULT
16 GATE
25
15 RAMP
14 REMOTE
13 FB1
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
EXPOSED PAD (PIN 25) INTERNALLY CONNECTED
TO GND (PCB CONNECTION OPTIONAL)
T_JMAX = 125°C, θ_JA = 37°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC2925CUF
LTC2925IUF
UF PART
MARKING
2925
2925
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 5V unless otherwise noted.
SYMBOL
V_CC
I_CC
PARAMETER
Input Supply Range
Input Supply Current
V_CC(UVL)
Input Supply Undervoltage Lockout
CONDITIONS
I_FBx = 0, I_TRACKx = 0, I_RAMPBUF = 0
I_FBx = –1mA, I_TRACKx = –1mA,
I_RAMPBUF = –3mA
V_CC Rising
MIN TYP MAX UNITS
q 2.9
5.5
V
q
1.5
3
mA
q
10.5
15
mA
q 2.3
2.5
2.7
V
2925f
2