參數(shù)資料
型號： LTC4280IUFD
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24
封裝： 4 X 5 MM, PLASTIC, MO-220, QFN-24
文件頁數(shù)： 22/28頁
文件大?。?/td> 286K
代理商： LTC4280IUFD
LTC4280
3
4280f
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VDD = 12V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supplies
VDD
Input Supply Range
l
2.9
15
V
VOV(VDD)
Input Supply Overvoltage Threshold
l
15
15.6
16.5
V
IDD
Input Supply Current
l
35
mA
VDD(UVL)
Input Supply Undervoltage Lockout
VDD Rising
l
2.75
2.84
2.89
V
VDD(HYST)
Input Supply Undervoltage Lockout Hysteresis
l
75
100
125
mV
INTVCC
Internal Regulator Voltage
VDD ≥ 3.3V
l
2.9
3.1
3.4
V
INTVCC(UVL)
INTVCC Undervoltage Lockout
INTVCC Rising
l
2.55
2.64
2.79
V
INTVCC(HYST)
INTVCC Undervoltage Lockout Hysteresis
l
20
55
75
mV
Current Limit and Circuit Breaker
ΔVSENSE(TH)
Circuit Breaker Threshold (VDD – VSENSE)
l
22.5
25
27.5
mV
ΔVSENSE
Current Limit Voltage (VDD – VSENSE)VFB = 1.3V
VFB = 0V
l
22.5
7
26
10
29.5
13.5
mV
ISENSE(IN)
SENSE +/– Input Current
VSENSE = 12V
l
10
20
35
μA
Gate Drive
ΔVGATE
External N-Channel Gate Drive (VGATE – VSOURCE)
(Note 3)
VDD = 2.9V to 15V
l
4.7
5.9
6.5
V
IGATE(UP)
External N-Channel Gate Pull-Up Current
Gate On, VGATE = 0V
l
–15
–20
–30
μA
IGATE(DN)SLOW
External N-Channel Gate Pulldown Current
Gate Off, VGATE = 15V
l
0.8
1
1.6
mA
IGATE(DN)FAST
Pulldown Current From GATE to SOURCE
During OC/UVLO
VDD – SENSE = 100mV, VGS = 4V
l
300
450
700
mA
tPHL(SENSE)
(VDD – SENSE) High to GATE Low
VDD – SENSE = 100mV, CGS = 10nF
l
0.5
1
μs
VGS(POWERBAD)
Gate-Source Voltage for Power Bad Fault
VSOURCE = 2.9V – 15V
l
3.8
4.3
4.7
V
Comparator Inputs
VON(TH)
ON Pin Threshold Voltage
VON Rising
l
1.210
1.235
1.26
V
ΔVON(HYST)
ON Pin Hysteresis
l
60
128
180
mV
ION(IN)
ON Pin Input Current
VON = 1.2V
l
0
±1
μA
VEN(TH)
EN Input Threshold
VEN = Rising
l
1.215
1.235
1.255
V
ΔVEN(HYST)
EN Hysteresis
l
50
128
200
mV
IEN
EN Pin Input Current
EN = 3.5V
l
0
±1
μA
VOV(TH)
OV Pin Threshold Voltage
VOV Rising
l
1.215
1.235
1.255
V
ΔVOV(HYST)
OV Pin Hysteresis
l
10
30
40
mV
IOV(IN)
OV Pin Input Current
VOV = 1.8V
l
0
±1
μA
VUV(TH)
UV Pin Threshold Voltage
VUV Rising
l
1.215
1.235
1.255
V
ΔVUV(HYST)
UV Pin Hysteresis
l
60
80
100
mV
IUV(IN)
UV Pin Input Current
VUV = 1.8V
l
0
±1
μA
VUV(RTH)
UV Pin Reset Threshold Voltage
VUV Falling
l
0.33
0.4
0.47
V
ΔVUV(RHYST)
UV Pin Reset Threshold Hysteresis
l
60
125
210
mV
VFB
Foldback Pin Power Good Threshold
FB Rising
l
1.215
1.235
1.255
V
ΔVFB(HYST)
FB Pin Power Good Hysteresis
l
38
15
mV
IFB
Foldback Pin Input Current
FB = 1.8V
l
0
±1
μA
VGPIO(TH)
GPIO Pin Input Threshold
VGPIO Rising
l
0.8
1
1.2
V
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