LTC1421(Rev_A) Просмотр технического описания (PDF) - Linear Technology
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LTC1421 Datasheet PDF : 24 Pages
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LTC1421/LTC1421-2.5
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (VCCLO, VCCHI, AUXVCC) .............. 13.2V
Input Voltage (Analog Pins) ..... – 0.3V to (VCCHI + 0.3V)
Input Voltage (Digital Pins) ................... – 0.3V to 13.2V
Output Voltage (Digital Pins) .. – 0.3V to (VCCLO + 0.3V)
Output Voltage (CPON) ......... – 13.2V to (VCCLO + 0.3V)
Output Voltage (VOUTLO, VOUTHI) ........... – 0.3V to 13.2V
Output Voltage (GATELO, GATEHI) ........... – 0.3V to 20V
Operating Temperature Range .................... 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CON1 1
CON2 2
POR 3
FAULT 4
DISABLE 5
PWRGD 6
RESET 7
REF 8
CPON 9
RAMP 10
FB 11
GND 12
24 AUXVCC
23 VCCLO
22 SETLO
21 GATELO
20 VOUTLO
19 VCCHI
18 SETHI
17 GATEHI
16 VOUTHI
15 COMPOUT
14 COMP –
13 COMP +
G PACKAGE
24-LEAD PLASTIC SSOP
SW PACKAGE
24-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 100°C/W (G)
TJMAX = 125°C, θJA = 85°C/W (SW)
ORDER PART
NUMBER
LTC1421CG
LTC1421CSW
LTC1421-2.5CG
LTC1421-2.5CSW
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS VCCHI = 12V, VCCLO = 5V, TA = 25°C unless otherwise noted (Note 2).
SYMBOL PARAMETER
DC Characteristics
ICCLO
ICCHI
VLKO
VLKH
VREF
∆VLNR
∆VLDR
IRSC
VCOF
VCPSR
VCHST
VRST
VCCLO Supply Current
VCCHI Supply Current
Undervoltage Lockout
Undervoltage Lockout Hysteresis
Reference Output Voltage
Reference Line Regulation
Reference Load Regulation
Reference Short-Circuit Current
Comparator Offset Voltage
Comparator Power Supply Rejection
Comparator Hysteresis
Reset Voltage Threshold (VOUTLO)
VRHST Reset Threshold Hysteresis (VOUTLO)
RFB
VCB
VTRIP
FB Pin Input Resistance
Circuit Breaker Trip Voltage
Output Voltage for Re-Power-Up
CONDITIONS
MIN TYP MAX
UNITS
CON1 = CON2 = GND, POR = VCCLO
q
CON1 = CON2 = GND, POR = VCCLO
q
VCCLO and VCCHI
VCCLO and VCCHI
No Load
q
3V ≤ VCCLO ≤ 12V, No Load
q
IO = 0mA to – 5mA, Sourcing Only
q
VREF = 0V
0V ≤ VCM ≤ (VCCLO − 1.3V)
q
0V ≤ VCM ≤ (VCCLO − 1.3V), 3V ≤ VCCLO ≤ 12V
q
0V ≤ VCM ≤ (VCCLO − 1.3V)
FB = VOUTLO
q
FB = Floating
q
FB = GND
q
FB = VOUTLO
FB = Floating
FB = GND
0V ≤ VFB ≤ VCCLO
VCB = (VCCLO – VSETLO) or VCB = (VCCHI – VSETHI) q
LTC1421 (Note 3)
LTC1421-2.5 (Note 4)
2.28
1.220
2.80
4.50
5.75
40
1.5
0.6
2.45
100
1.232
4
1
– 45
7
2.90
4.65
5.88
7
12
15
95
50
0.1
2.5
3
1
2.60
1.244
8
3
± 10
1
3.00
4.75
6.01
60
mA
mA
V
mV
V
mV
mV
mA
mV
mV/V
mV
V
V
V
mV
mV
mV
kΩ
mV
V
V
2
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