LTC1643H 查看數據表（PDF） - Linear Technology
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LTC1643H Datasheet PDF : 16 Pages
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LTC1643L/LTC1643L-1/LTC1643H
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
LTC1643LC/LTC1643L-1C/LTC1643HC ... 0°C to 70°C
LTC1643LI/LTC1643HI ...................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
ORDER PART NUMBER
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 LTC1643H, ON FOR LTC1643L
TJMAX = 150°C, θJA = 135°C/ W
LTC1643HCGN
LTC1643LCGN
LTC1643L-1CGN
LTC1643HIGN
LTC1643LIGN
GN PART MARKING
1643H
1643L
1643L1
1643HI
1643LI
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, VEE = – 12V, V3VIN = 3.3V, V5VIN = 5V. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN
IDD
VLKO
VFB
tCB
ICP
∆VGATE
VDROP
ICL
TTS
VTH
V12VIN Supply Current
Undervoltage Lockout
Foldback Current Limit Voltage
Circuit Breaker Trip Filter Time
ON = 3V, ON = GND
12VIN
3VIN
5VIN
VFB = (V5VIN – V5VSENSE), V5VOUT = 0V
VFB = (V5VIN – V5VSENSE), V5VOUT > 4V
VFB = (V3VIN – V3VSENSE), V3VOUT = 0V
VFB = (V3VIN – V3VSENSE), V3VOUT > 2V
q
q
7
q 2.25
q 2.25
q
4
q 40
q
4
q 40
GATE Pin Output Current
Charge Pump On, VGATE = GND, FAULT = High
Charge Pump Off, VGATE = 5V, FAULT = High
Charge Pump Off, VGATE = 2V, FAULT = Low
q – 20
q
3
External Gate Voltage
(V12VIN – VGATE)
Internal Switch Voltage Drop
(V12VIN – V12VOUT),
I12VOUT = 500mA
0°C ≤ TA ≤ 70°C q
– 40°C ≤ TA ≤ 85°C q
(VEEOUT – VEEIN), IVEEIN = 100mA
q
Current Foldback
12VIN = 12V, 12VOUT = 0V
q 50
12VIN, 12VOUT = 12V
q 525
VEEIN = –12V, VEEOUT = 0V (LTC1643L/LTC1643H Only) q 100
VEEIN, VEEOUT = – 12V
q 225
Thermal Shutdown Temperature
Power-Good Threshold Voltage
V12VOUT
LTC1643H/LTC1643L Only
VEEOUT
LTC1643H/LTC1643L Only
0°C ≤ TA ≤ 70°C q 10.8
– 40°C ≤ TA ≤ 85°C q 10.4
0°C ≤ TA ≤ 70°C q – 10.2
– 40°C ≤ TA ≤ 85°C q – 10.0
TYP
3.5
9.5
2.5
2.5
7.5
53
7.5
53
14.6
– 50
200
10
100
250
250
120
250
850
160
450
150
11.1
11.1
– 10.5
– 10.5
MAX
8
10.8
2.75
2.75
12
65
12
65
– 100
20
200
600
750
250
500
1500
500
800
11.4
11.4
– 10.8
– 10.8
UNITS
mA
V
V
V
mV
mV
mV
mV
µs
µA
µA
mA
mV
mV
mV
mA
mA
mA
mA
°C
V
V
V
V
2
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