LTC1646IGN Просмотр технического описания (PDF) - Linear Technology
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LTC1646IGN Datasheet PDF : 20 Pages
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LTC1646
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltages: 5VIN, 3VIN ................................................ 7V
Input Voltages: (Pins 15, 16) ...... –0.3V to (5VIN + 0.3V)
Output Voltages: (Pins 1, 3, 4) ... –0.3V to (5VIN + 0.3V)
Analog Voltages and Currents:
(Pins 9, 11) .......................................... –0.3V to 5VIN
(Pins 2, 5, 7, 13, 14) .............. –0.3V to (5VIN + 0.3V)
(Pin 10) .......................................................... ±20mA
Operating Temperature Range:
LTC1646C ............................................... 0°C to 70°C
LTC1646I .............................................–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
RESETOUT 1
TIMER 2
FAULT 3
PWRGD 4
5VOUT 5
GND 6
3VOUT 7
3VIN 8
16 RESETIN
15 OFF/ON
14 DRIVE
13 PRECHARGE
12 5VIN
11 5VSENSE
10 GATE
9 3VSENSE
GN PACKAGE
16-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 135°C/W
ORDER PART
NUMBER
LTC1646CGN
LTC1646IGN
GN PART
MARKING
1646
1646I
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V5VIN = 5V and V3VIN = 3.3V unless otherwise noted.
SYMBOL
IDD
VLKO
VFB
VCB
t OC
t SS
ICP
VGATE
VTH
V3VONLY
VIL
VIH
VTIMER
PARAMETER
CONDITIONS
V5VIN Supply Current
OFF/ON = 0V
Undervoltage Lockout
5VIN
3VIN
Foldback Current Limit Voltage
VFB = (V5VIN –␣ V5VSENSE), V5VOUT = 0V, TIMER = 0V
VFB = (V5VIN – V5VSENSE), V5VOUT = 4V, TIMER = 0V
VFB = (V3VIN – V3VSENSE), V3VOUT = 0V, TIMER = 0V
VFB = (V3VIN – V3VSENSE), V3VOUT = 2V, TIMER = 0V
Circuit Breaker Trip Voltage
VCB = (V5VIN – V5VSENSE), V5VOUT = 5V, TIMER Open
VCB = (V3VIN – V3VSENSE), V3VOUT = 3.3V, TIMER Open
Overcurrent Fault Response Time (V5VIN – V5VSENSE) = 100mV, TIMER Open
(V3VIN – V3VSENSE) = 100mV, TIMER Open
Short-Circuit Fault Response Time (V5VIN – V5VSENSE) = 200mV, TIMER Open
(V3VIN – V3VSENSE) = 200mV, TIMER Open
GATE Pin Output Current
OFF/ON = 0V, VGATE = 0V, TIMER = 0V
OFF/ON = 5V, VGATE = 5V, TIMER = 0V
OFF/ON = 0V, VGATE = 5V, FAULT = 0V, TIMER Open
External Gate Voltage
(GATE to GND)
OFF/ON = 0V, IGATE = –1µA
OFF/ON = 0V, V5VIN = 3.3V, IGATE = –1µA
Power Good Threshold Voltage
3VOUT
5VOUT
No 5V Input Mode Window Voltage V3VONLY = V5VIN – V3VIN, V5VOUT = V3VOUT = 3.3V
Input Low Voltage
OFF/ON, RESETIN, FAULT
Input High Voltage
OFF/ON, RESETIN, FAULT
TIMER Threshold Voltage
VTIMER , FAULT = 0V
MIN TYP MAX UNITS
q
1.5
4
mA
q 2.3
2.50
2.7
V
q 2.3
2.55
2.7
V
q 15
20
30
mV
q 50
55
65
mV
q 15
20
30
mV
q 50
55
65
mV
q 50
56
65
mV
q 50
56
65
mV
q 10
21
30
µs
q 10
21
30
µs
q
0.145
1
µs
q
0.145
1
µs
q –18 –13
–8
µA
80
200
300
µA
q4
7
12
mA
q 12
15
16
V
q 11
13
15
V
q 2.8
2.9
3.0
V
q 4.5
4.65 4.75
V
q 50
120 200
mV
q
0.8
V
q2
V
q 1.15 1.25 1.35
V
2
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