參數(shù)資料
型號(hào)： LTC4222IUH#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32
封裝： 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD-X, QFN-32
文件頁(yè)數(shù)： 23/32頁(yè)
文件大?。?/td> 280K
代理商： LTC4222IUH#PBF
LTC4222
3
4222fa
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
VDDn
Input Supply Range
l
2.9
29
V
IDD1
VDD1 Input Supply Current
VDD1 = 12V
l
0.85
1.2
mA
IDD2
VDD2 Input Supply Current
VDD2 = 12V, IINTVCC = 0mA
l
34
mA
VDDn(UVL)
Input Supply Undervoltage Lockout
VDD Rising
l
2.34
2.43
2.53
V
VDDn(HYST)
Input Supply Undervoltage Lockout
Hysteresis
l
60
80
100
mV
INTVCC
Internal Regulator Voltage
IINTVCC = 0mA
l
3.15
3.3
3.45
V
INTVCC(UVL)
INTVCC Undervoltage Lockout
INTVCC Rising
l
2.55
2.64
2.73
V
INTVCC(HYST)
INTVCC Undervoltage Lockout Hysteresis
l
35
50
65
mV
Current Limit and Circuit Breaker (Both Channels)
ΔVSENSE(TH)
Circuit Breaker Threshold (VDD – VSENSE)
l
47.5
48.75
50
52.5
51.25
mV
ΔVSENSE
Current Limit Voltage (VDD – VSENSE)VFB = 1.3V
VFB = 0V
Start-Up Timer Expired
l
46
14
130
50
16.6
150
54
19
165
mV
tD(OC)
OC Fault Filter
ΔVSENSE = 100mV
l
10
20
30
μs
ISENSE(IN)
SENSE+/SENSE– Pin Input Current
VSENSE = 12V
l
020
40
μA
Gate Drive
ΔVGATE
External N-Channel Gate Drive
(VGATE – VSOURCE) (Note 3)
VDD = 2.9V to 29V
l
4.7
5.9
6.5
V
IGATE(UP)
External N-Channel Gate Pull-Up Current
Gate On, VGATE = 0V
l
–8
–12
–18
μA
IGATE(DN)
External N-Channel Gate Pull-Down Current
Gate Off, VGATE = 15V
l
0.8
1
1.5
mA
IGATE(LIM)
Pull-Down Current from GATE to SOURCE
During OC/UVLO
VGATE = 15V, (VDD – VSENSE)n = 200mV
l
450
mA
tPHL(SENSE)
(VDD – SENSE) High to GATE Low
VDD – SENSE = 200mV, CGATE = 10nF
l
0.5
1
μs
VGS(POWERBAD)
(GATE-SOURCE) Voltage for Power Bad Fault
VSOURCE = 2.9V to 29V
l
3.8
4.3
4.7
V
Comparator Inputs
VINPUT(TH)
CONFIG, EN, FB, ON, OV and UV Input
Threshold
VIN Rising
l
1.215
1.235
1.255
V
ΔVCONFIG,EN,ON(HYST) CONFIG, EN, ON Hysteresis
l
80
128
180
mV
ΔVFB(HYST)
FB Power Good Hysteresis
l
2
7
20
mV
ΔVOV(HYST)
OV Hysteresis
l
16
24
32
mV
ΔVUV(HYST)
UV Hysteresis
l
60
90
110
mV
I(IN)
CONFIG, FB, ON, OV and UV Input Current
VIN = 3V
l
0±1
μA
IEN(UP)
EN Pull-Up Current
VEN = 0V
l
510
20
μA
VUV(RTH)
UV Reset Threshold Voltage
VUV Falling
l
0.36
0.4
0.46
V
ΔVUV(RHYST)
UV Reset Threshold Hysteresis
l
60
125
180
mV
VGPIO(TH)
GPIO Input Threshold
VGPIO Rising
l
0.8
1
1.2
V
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