LTC1421 Ver la hoja de datos (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
LTC1421C ............................................... 0°C to 70°C
LTC1421I ........................................... – 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
CON1 1
CON2 2
POR 3
FAULT 4
DISABLE 5
PWRGD 6
RESET 7
REF 8
CPON 9
RAMP 10
FB 11
GND 12
TOP VIEW
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
SW PACKAGE
24-LEAD PLASTIC SSOP 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
LTC1421CG-2.5
LTC1421CSW-2.5
LTC1421IG
LTC1421ISW
LTC1421IG-2.5
LTC1421ISW-2.5
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCCHI = 12V, VCCLO = 5V unless otherwise noted (Note 2).
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
DC Characteristics
ICCLO
VCCLO Supply Current
CON1 = CON2 = GND, POR = VCCLO
q
1.5
3
ICCHI
VCCHI Supply Current
VLKO
Undervoltage Lockout
CON1 = CON2 = GND, POR = VCCLO
VCCLO and VCCHI
q
0.6
1
2.28 2.45 2.60
VLKH
Undervoltage Lockout Hysteresis
VCCLO and VCCHI
100
VREF
∆VLNR
Reference Output Voltage
Reference Line Regulation
No Load
3V ≤ VCCLO ≤ 12V, No Load
q 1.220
q
1.232
4
1.244
8
∆VLDR Reference Load Regulation
IO = 0mA to – 5mA, Sourcing Only
q
1
3
IRSC
Reference Short-Circuit Current
VREF = 0V
– 45
VCOF
Comparator Offset Voltage
0V ≤ VCM ≤ (VCCLO − 1.3V)
q
± 10
VCPSR Comparator Power Supply Rejection
0V ≤ VCM ≤ (VCCLO − 1.3V), 3V ≤ VCCLO ≤ 12V
q
1
VCHST Comparator Hysteresis
0V ≤ VCM ≤ (VCCLO − 1.3V)
7
VRST
Reset Voltage Threshold (VOUTLO)
FB = VOUTLO
FB = Floating
FB = GND
q 2.80 2.90 3.00
q 4.50 4.65 4.75
q 5.75 5.88 6.01
VRHST Reset Threshold Hysteresis (VOUTLO)
FB = VOUTLO
7
FB = Floating
12
FB = GND
15
RFB
FB Pin Input Resistance
0V ≤ VFB ≤ VCCLO
95
VCB
Circuit Breaker Trip Voltage
VCB = (VCCLO – VSETLO) or VCB = (VCCHI – VSETHI) q
40
50
60
VTRIP
Output Voltage for Re-Power-Up
LTC1421 (Note 3)
0.1
LTC1421-2.5 (Note 4)
2.5
UNITS
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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