LTC1644IGN Просмотр технического описания (PDF) - Linear Technology
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LTC1644IGN Datasheet PDF : 24 Pages
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LTC1644
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltages
12VIN ................................................................ 13.2V
VEEIN .................................................................. –14V
Input Voltages (Pins 5, 9) .......................– 0.3V to 13.5V
Output Voltages (Pins 6, 7, 10) ..............– 0.3V to 13.5V
Analog Voltages and Currents
Pins 3, 11 to 14, 16 to 18 ...................– 0.3V to 13.5V
Pins 4, 15 ............................. – 0.3V to (12VIN + 0.3V)
VEEOUT ...................................................– 14V to 0.3V
12VOUT ...............................................– 0.3V to 13.2V
Operating Temperature Range
LTC1644C ............................................... 0°C to 70°C
LTC1644I ............................................ – 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
12VIN 1
VEEIN 2
5VOUT 3
TIMER 4
OFF/ON 5
FAULT 6
PWRGD 7
GND 8
RESETIN 9
RESETOUT 10
20 12VOUT
19 VEEOUT
18 3VOUT
17 3VIN
16 3VSENSE
15 GATE
14 5VSENSE
13 5VIN
12 PRECHARGE
11 DRIVE
ORDER PART
NUMBER
LTC1644CGN
LTC1644IGN
GN PACKAGE
20-LEAD PLASTIC SSOP
TJMAX = 140°C, θJA = 135°C/W
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.
V12VIN = 12V, VEEIN = –12V, V3VIN = 3.3V, V5VIN = 5V unless otherwise noted.
SYMBOL
IDD
VLKO
PARAMETER
V12VIN Supply Current
Undervoltage Lockout
VFB
Foldback Current Limit Voltage
VCB
Circuit Breaker Trip Voltage
tOC
Overcurrent Fault Response Time
tSC
Short-Circuit Response Time
ICP
GATE Pin Output Current
∆VGATE
VDROP
External Gate Voltage
Internal Switch Voltage Drop
ICL
Current Foldback
TTS
Thermal Shutdown Temperature
CONDITIONS
OFF/ON = 0V
12VIN, Ramping Down
3VIN, 5VIN, Ramping Down
VFB = (V5VIN – V5VSENSE), V5VOUT = 0V, TIMER = 0V
VFB = (V5VIN – V5VSENSE), V5VOUT = 3V, TIMER = 0V
VFB = (V3VIN – V3VSENSE), V3VOUT = 0V, TIMER = 0V
VFB = (V3VIN – V3VSENSE), V3VOUT = 2V, TIMER = 0V
VCB = (V5VIN – V5VSENSE), TIMER = FLOAT
VCB = (V3VIN – V3VSENSE), TIMER = FLOAT
(V5VIN – V5VSENSE) = 100mV, TIMER = FLOAT
(V3VIN – V3VSENSE) = 100mV, TIMER = FLOAT
(V5VIN – V5VSENSE) = 200mV, TIMER = FLOAT
(V3VIN – V3VSENSE) = 200mV, TIMER = FLOAT
OFF/ON = 0V, VGATE = 0V, TIMER = 0V
VGATE = 5V, OFF/ON = 4V
OFF/ON = 0V, VGATE = 2V, TIMER = FLOAT, FAULT = 0V
∆VGATE = (V12VIN – VGATE), IGATE = –1µA
VDROP = (V12VIN – V12VOUT), I = 500mA
VDROP = (VEEOUT – VEEIN), IEE = 100mA
12VIN = 12V, 12VOUT = 0V, TIMER = 0V
12VIN = 12V, 12VOUT = 10V, TIMER = 0V
VEEIN = –12V, VEEOUT = 0V, TIMER = 0V
VEEIN = –12V, VEEOUT = –10V, TIMER = 0V
MIN
q
q 6.00
q 2.25
q8
q 40
q8
q 40
q 40
q 40
q 30
q 30
q
q
q – 20
100
q3
q
q
q
q – 50
q – 525
q 20
q 200
TYP
3
8.30
2.48
12
51
12
51
55
55
45
45
0.1
0.1
– 65
225
10
50
200
110
– 360
– 840
100
320
130
MAX
8
10.80
2.75
15
70
15
70
70
70
60
60
1.0
1.0
– 100
300
20
200
600
250
– 600
– 1500
300
650
UNITS
mA
V
V
mV
mV
mV
mV
mV
mV
µs
µs
µs
µs
µA
µA
mA
mV
mV
mV
mA
mA
mA
mA
°C
1644f
2
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