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参数资料
型号： LTC3865IUH#PBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： DUAL SWITCHING CONTROLLER, 880 kHz SWITCHING FREQ-MAX, PQCC32
封装： 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32
文件页数： 33/38页
文件大小： 400K
代理商： LTC3865IUH#PBF
LTC3865/LTC3865-1
4
3865fb
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
junction temperature range, otherwise specications are at TA = 25°C (Note 2). VIN = 15V, VRUN1,2 = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loops
VIN
Input Voltage
4.5
38
V
VOSENSE1,2
Output Voltage Sensing (E-Grade)
(Note 4) ITH1,2 Voltage = 1.2V
VID11 = VID21 = GND, VID12 = VID22 = GND
VID11 = VID21 = GND, VID12 = VID22 = Float
VID11 = VID21 = GND, VID12 = VID22 = INTVCC
VID11 = VID21 = Float, VID12 = VID22 = GND
VID11 = VID21 = Float, VID12 = VID22 = Float
VID11 = VID21 = Float, VID12 = VID22 = INTVCC
VID11 = VID21 = INTVCC, VID12 = VID22 = GND
VID11 = VID21 = INTVCC, VID12 = VID22 = Float
VID11 = VID21 = INTVCC, VID12 = VID22 = INTVCC
l
1.089
0.990
1.188
1.485
0.596
1.782
2.463
3.251
4.925
1.100
1.000
1.200
1.500
0.602
1.800
2.500
3.300
5.000
1.111
1.010
1.212
1.515
0.608
1.818
2.538
3.350
5.075
V
Output Voltage Sensing (I-Grade)
(Note 4) ITH1,2 Voltage = 1.2V
VID11 = VID21 = GND, VID12 = VID22 = GND
VID11 = VID21 = GND, VID12 = VID22 = Float
VID11 = VID21 = GND, VID12 = VID22 = INTVCC
VID11 = VID21 = Float, VID12 = VID22 = GND
VID11 = VID21 = Float, VID12 = VID22 = Float
VID11 = VID21 = Float, VID12 = VID22 = INTVCC
VID11 = VID21 = INTVCC, VID12 = VID22 = GND
VID11 = VID21 = INTVCC, VID12 = VID22 = Float
VID11 = VID21 = INTVCC, VID12 = VID22 = INTVCC
l
1.084
0.985
1.182
1.478
0.593
1.773
2.450
3.234
4.900
1.100
1.000
1.200
1.500
0.602
1.800
2.500
3.300
5.000
1.117
1.015
1.218
1.523
0.611
1.827
2.550
3.366
5.100
V
IOSENSE1,2
Feedback Current
(Note 4) VID11 = VID21 = VID12 = VID22 = Float
–10
–50
nA
VREFLNREG
Reference Voltage Line Regulation
VIN = 4.5V to 38V (Note 4)
0.002
0.02
%/V
VLOADREG
Output Voltage Load Regulation
(Note 4)
Measured in Servo Loop;
ΔITH Voltage = 1.2V to 0.7V
Measured in Servo Loop;
ΔITH Voltage = 1.2V to 1.6V
l
0.01
–0.01
0.1
–0.1
%
gm1,2
Transconductance Amplier gm
ITH1,2 = 1.2V; Sink/Source 5μA; (Note 4)
2.2
mmho
IQ
Input DC Supply Current
Normal Mode
Shutdown
(Note 5)
VIN = 15V
VRUN1,2 = 0V
3
30
50
mA
μA
UVLO
Undervoltage Lockout on INTVCC
VINTVCC Ramping Down
3.3
V
UVLOHYS
UVLO Hysteresis
0.55
V
VOVL
Feedback Overvoltage Lockout
Measured at VOSENSE1,2 with VID Pins Floating
l
0.64
0.66
0.68
V
ISENSE
Sense Pins Total Current
(Each Channel); VSENSE1,2 = 3.3V
±1
±2
μA
DFMAX
Maximum Duty Cycle
In Dropout
94
95
%
ITK/SS1,2
Soft-Start Charge Current
VTK/SS1,2 = 0V
0.9
1.3
1.7
μA
VRUN1,2
RUN Pin On Threshold
VRUN1, VRUN2 Rising
l
1.1
1.22
1.35
V
VRUN1,2HYS
RUN Pin On Hysteresis
80
mV
IRUN1,2HYS
RUN Pin Current Hysteresis
4.5
μA
VSENSE(MAX) Maximum Current Sense Threshold
(E-Grade)
VITH1,2 = 3.3V, ILIM = 0V
VITH1,2 = 3.3V, ILIM = Float (Note 8)
VITH1,2 = 3.3V, ILIM = INTVCC
In Overvoltage Condition
l
24
44
68
–63
30
50
75
–53
36
56
82
–43
mV
Maximum Current Sense Threshold
(I-Grade)
VITH1,2 = 3.3V, ILIM = 0V
VITH1,2 = 3.3V, ILIM = Float (Note 8)
VITH1,2 = 3.3V, ILIM = INTVCC
In Overvoltage Condition
l
22
42
66
–65
30
50
75
–53
38
58
84
–41
mV
TG RUP
TG Driver Pull-Up On-Resistance
TG High
2.6
Ω
TG RDOWN
TG Driver Pull-Down On-Resistance
TG Low
1.5
Ω
BG RUP
BG Driver Pull-Up On-Resistance
BG High
3
Ω
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