LTC1422 Ver la hoja de datos (PDF) - Linear Technology
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LTC1422 Datasheet PDF : 16 Pages
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LTC1422
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (VCC) ........................................... 13.2V
Input Voltage (TIMER, SENSE) ... – 0.3V to (VCC + 0.3V)
Input Voltage (FB, ON) ........................... – 0.3V to 13.2V
Output Voltage (RESET) ........................ – 0.3V to 13.2V
Output Voltage (GATE) ............................. – 0.3V to 20V
Operating Temperature Range
LTC1422C ............................................... 0°C to 70°C
LTC1422I ........................................... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RESET 1
ON 2
TIMER 3
GND 4
8 VCC
7 SENSE
6 GATE
5 FB
N8 PACKAGE
S8 PACKAGE
8-LEAD PDIP 8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/W (N)
TJMAX = 150°C, θJA = 150°C/W (S)
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1422CN8
LTC1422CS8
LTC1422IN8
LTC1422IS8
S8 PART MARKING
1422
1422I
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
DC Characteristics
ICC
VLKO
VLKH
VFB
∆VFB
VFBHST
VTM
∆VTM
VTMHST
ITM
VCC Supply Current
VCC Undervoltage Lockout
VCC Undervoltage Lockout Hysteresis
FB Pin Voltage Threshold
FB Pin Threshold Line Regulation
FB Pin Voltage Threshold Hysteresis
TIMER Pin Voltage Threshold
TIMER Pin Threshold Line Regulation
TIMER Pin Voltage Threshold Hystersis
TIMER Pin Current
VCB
Circuit Breaker Trip Voltage
ICP
GATE Pin Output Current
∆VGATE
VONHI
VONLO
VONHYST
VOL
IPU
tRST
External N-Channel Gate Drive
ON Pin Threshold High
ON Pin Threshold Low
ON Pin Hysteresis
Output Low Voltage
Logic Output Pull-Up Current
Soft Reset Time
ON = VCC
3V ≤ VCC ≤ 12V
3V ≤ VCC ≤ 12V
Timer On, GND ≤ VTIMER ≤ 1.5V
Timer Off, VTIMER = 1.5V
VCB = (VCC – VSENSE)
Charge Pump On, VGATE = GND
Charge Pump Off, VGATE = VCC
VGATE – VCC
RESET, IO = 3mA
RESET = GND
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
MIN TYP MAX
UNITS
q
0.65 1.00
mA
q 2.40 2.47 2.55
V
120
mV
q 1.220 1.232 1.244
V
q
0.5
2.5
mV
2.0
mV
q 1.208 1.232 1.256
V
q
2
15
mV
45
mV
q – 2.5 – 2.0 – 1.5
µA
10
mA
q 44
50
64
mV
q – 12 – 10
–8
µA
10
mA
q 10
12
14
V
q 1.25 1.30 1.35
V
q 1.20 1.23 1.26
V
80
mV
q
0.14
0.4
V
– 12
µA
q 22
30
38
µs
2
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