LTC1643ALC(RevA) Просмотр технического описания (PDF) - Linear Technology
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LTC1643ALC Datasheet PDF : 16 Pages
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LTC1643AL
LTC1643AL-1/LTC1643AH
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltages
12VIN ................................................................ 13.2V
VEEIN .............................................................. –13.2V
Input Voltage (Pin 5) ................ – 0.3V to (12VIN + 0.3V)
Output Voltages (Pins 6, 7) ...... – 0.3V to (12VIN + 0.3V)
Analog Voltages
(Pins 3, 4, 9, 10 to 14) ........ – 0.3V to (12VIN + 0.3V)
VEEOUT ............................................ –13.2V to + 0.3V
12VOUT .............................................. – 0.3V to 13.2V
Operating Temperature Range
LTC1643ALC/LTC1643AL-1C/
LTC1643AHC ........................................... 0°C to 70°C
LTC1643ALI/LTC1643AL-1I/
LTC1643AHI ...................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
ORDER PART NUMBER
TOP VIEW
12VIN 1
VEEIN 2
3VOUT 3
TIMER 4
ON/ON* 5
FAULT 6
PWRGD 7
GND 8
16 12VOUT
15 VEEOUT
14 5VOUT
13 5VIN
12 5VSENSE
11 GATE
10 3VSENSE
9 3VIN
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
*ON FOR LTC1643AH,
ON FOR LTC1643AL/LTC1643AL-1
TJMAX = 150°C, θJA = 135°C/ W
LTC1643AHCGN
LTC1643ALCGN
LTC1643AL-1CGN
LTC1643AHIGN
LTC1643ALIGN
LTC1643AL-1IGN
GN PART MARKING
1643AH
1643AL
643AL1
643AHI
643ALI
43AL1I
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. V12VIN = 12V, VEEIN = – 12V, V3VIN = 3.3V, V5VIN = 5V (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
IDD
VLKO
VFB
tCB
ICP
∆VGATE
VDROP
ICL
TTS
VTH
V12VIN Supply Current
Undervoltage Lockout
Foldback Current Limit Voltage
Circuit Breaker Trip Filter Time
GATE Pin Output Current
External Gate Voltage
Internal Switch Voltage Drop
Current Foldback
Thermal Shutdown Temperature
Power-Good Threshold Voltage
ON = GND, ON = 3V
q
12VIN
q
3VIN
q
5VIN
q
VFB = (V5VIN – V5VSENSE), V5VOUT = 0V
q
VFB = (V5VIN – V5VSENSE), V5VOUT > 4V
q
VFB = (V3VIN – V3VSENSE), V3VOUT = 0V
q
VFB = (V3VIN – V3VSENSE), V3VOUT > 2V
q
Charge Pump On, VGATE = GND, FAULT = High
q
Charge Pump Off, VGATE = 5V, FAULT = High
Charge Pump Off, VGATE = 2V, FAULT = Low
q
(V12VIN – VGATE)
(V12VIN – V12VOUT),
I12VOUT = 500mA
0°C ≤ TA ≤ 70°C q
– 40°C ≤ TA ≤ 85°C q
(VEEOUT – VEEIN), IVEEIN = 100mA
q
12VIN = 12V, 12VOUT = 0V
q
12VIN = 12V, 12VOUT = 10V
q
VEEIN = –12V, VEEOUT = 0V (LTC1643AL/LTC1643AH Only) q
VEEIN = –12V, VEEOUT = – 10V
q
V12VOUT
LTC1643AH/LTC1643AL Only
VEEOUT
LTC1643AH/LTC1643AL Only
0°C ≤ TA ≤ 70°C q
– 40°C ≤ TA ≤ 85°C q
0°C ≤ TA ≤ 70°C q
– 40°C ≤ TA ≤ 85°C q
7
2.25
2.25
4
40
4
40
– 20
3
50
525
50
225
10.8
10.4
– 10.2
– 10.0
3.5
9.5
2.5
2.5
7.5
53
7.5
53
14.6
– 62
200
17.5
100
225
225
125
250
850
160
450
150
11.1
11.1
– 10.5
– 10.5
8
10.8
2.75
2.75
12
65
12
65
– 100
200
600
750
250
600
1500
500
800
11.4
11.4
– 10.8
– 10.8
mA
V
V
V
mV
mV
mV
mV
µs
µA
µA
mA
mV
mV
mV
mA
mA
mA
mA
°C
V
V
V
V
1643afa
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