LTC1645(RevA) Просмотр технического описания (PDF) - Linear Technology
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LTC1645 Datasheet PDF : 24 Pages
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LTC1645
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage (VCC1, VCC2) ................................. 13.2V
Input Voltage
FB, ON, COMP+ ..................... – 0.3V to (VCC1 + 0.3V)
TIMER ................................................. – 0.3V to 2.5V
SENSE1 ..................... (VCC1 – 0.7V) to (VCC1 + 0.3V)
SENSE2 ...................... (VCC1 – 0.7V) to (VCC2 + 0.3V)
Output Voltage
RESET, COMPOUT, FAULT .....................– 0.3V to 16V
GATE1, GATE2 ................. Internally Limited (Note 3)
Output Current
GATE1, GATE2 ............................................... ±20mA
Operating Temperature Range
LTC1645C ............................................... 0°C to 70°C
LTC1645I ............................................ – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VCC2 1
SENSE2 2
GATE2 3
GND 4
8 VCC1
7 SENSE1
6 GATE1
5 ON
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 150°C/ W
ORDER PART
NUMBER
LTC1645CS8
LTC1645IS8
S8 PART MARKING
1645
1645I
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
VCC2 1
SENSE2 2
GATE2 3
FAULT 4
RESET 5
FB 6
GND 7
14 VCC1
13 SENSE1
12 GATE1
11 TIMER
10 ON
9 COMPOUT
8 COMP+
S PACKAGE
14-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/ W
ORDER PART
NUMBER
LTC1645CS
LTC1645IS
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
2.375V ≤ VCC1 ≤ 12V, 1.2V ≤ VCC2 ≤ 12V unless otherwise noted (Note 2).
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
DC Characteristics
ICC1
VCC1 Supply Current
ON = VCC1 = 5V, VCC2 = 3.3V
q
1.1
2.0
mA
ICC2
VCC2 Supply Current
ON = VCC1 = 5V, VCC2 = 3.3V
q
0.28
0.4
mA
VLKO1
VCC1 Undervoltage Lockout
High to Low
q 2.16 2.23
2.3
V
VLKO2
VCC2 Undervoltage Lockout
High to Low
q 1.06 1.12 1.18
V
VLKHn
VCCn Undervoltage Lockout Hysteresis
25
mV
VFB
FB Pin Voltage Threshold
High to Low
q 1.226 1.238 1.250
V
∆VFB
FB Pin Threshold Line Regulation
High to Low, VCC1 = 2.375V to 12V
q
1
4
mV
VFBHST
FB Pin Voltage Threshold Hysteresis
5
mV
VCOMP
COMP+ Pin Voltage Threshold
High to Low
q 1.226 1.238 1.250
V
∆VCOMP
COMP+ Pin Threshold Line Regulation
High to Low, VCC1 = 2.375V to 12V
q
1
4
mV
VCOMPHST
COMP+ Pin Voltage Threshold Hysteresis
5
mV
1645fa
2
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