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参数资料
型号： LTC3890IUH#TRPBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： DUAL SWITCHING CONTROLLER, 585 kHz SWITCHING FREQ-MAX, PQCC32
封装： 5 X 5 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32
文件页数： 23/38页
文件大小： 381K
代理商： LTC3890IUH#TRPBF
LTC3890
3
3890fa
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IFB1,2
Feedback Current
(Note 4)
±5
±50
nA
VREFLNREG
Reference Voltage Line Regulation
(Note 4) VIN = 4.5V to 60V
0.002
0.02
%/V
VLOADREG
Output Voltage Load Regulation
(Note 4)
Measured in Servo Loop,
ΔITH Voltage = 1.2V to 0.7V
l
0.01
0.1
%
(Note 4)
Measured in Servo Loop,
ΔITH Voltage = 1.2V to 2V
l
–0.01
–0.1
%
gm1,2
Transconductance Amplifier gm
(Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA
2
mmho
IQ
Input DC Supply Current
(Note 5)
Pulse-Skipping or Forced Continuous
Mode (One Channel On)
RUN1 = 5V and RUN2 = 0V, VFB1 = 0.83V or
RUN1 = 0V and RUN2 = 5V, VFB2 = 0.83V
1.3
mA
Pulse-Skipping or Forced Continuous
Mode (Both Channels On)
RUN1,2 = 5V, VFB1,2 = 0.83V (No Load)
2
mA
Sleep Mode (One Channel On)
RUN1 = 5V and RUN2 = 0V or
RUN1 = 0V and RUN2 = 5V,
VFB1 = 0.83V (No Load)
50
75
μA
Sleep Mode (Both Channels On)
RUN1,2 = 5V, VFB1,2 = 0.83V (No Load)
60
100
μA
Shutdown
RUN1,2 = 0V
14
25
μA
UVLO
Undervoltage Lockout
INTVCC Ramping Up
INTVCC Ramping Down
l
3.6
3.92
3.80
4.2
4.0
V
VOVL
Feedback Overvoltage Protection
Measured at VFB1,2, Relative to Regulated VFB1,2
710
13
%
ISENSE+
SENSE+ Pin Current
Each Channel
±1
μA
ISENSE–
SENSE– Pins Current
Each Channel
VSENSE– < INTVCC – 0.5V
VSENSE– > INTVCC + 0.5V
700
±1
μA
DFMAX
Maximum Duty Factor
In Dropout
98
99
%
ITRACK/SS1,2
Soft-Start Charge Current
VTRACK1,2 = 0V
0.7
1.0
1.4
μA
VRUN1 On
VRUN2 On
RUN1 Pin On Threshold
RUN2 Pin On Threshold
VRUN1 Rising
VRUN2 Rising
l
1.15
1.20
1.21
1.25
1.27
1.30
V
VRUN1,2 Hyst RUN Pin Hysteresis
50
mV
VSENSE(MAX)
Maximum Current Sense Threshold
VFB1,2 = 0.7V, VSENSE1–,2– = 3.3V, ILIM = 0
VFB1,2 = 0.7V, VSENSE1–,2– = 3.3V, ILIM = INTVCC
VFB1,2 = 0.7V, VSENSE1–,2– = 3.3V, ILIM = FLOAT
l
22
43
64
30
50
75
36
57
85
mV
Gate Driver
TG1,2
Pull-Up On-Resistance
Pull-Down On-Resistance
2.5
1.5
Ω
BG1,2
Pull-Up On-Resistance
Pull-Down On-Resistance
2.4
1.1
Ω
TG1,2 tr
TG1,2 tf
TG Transition Time:
Rise Time
Fall Time
(Note 6)
CLOAD = 3300pF
25
16
ns
BG1,2 tr
BG1,2 tf
BG Transition Time:
Rise Time
Fall Time
(Note 6)
CLOAD = 3300pF
28
13
ns
TG/BG t1D
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
CLOAD = 3300pF Each Driver
30
ns
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted. (Note 2)
相关PDF资料
PDF描述
LTC3890HUH#PBF DUAL SWITCHING CONTROLLER, 585 kHz SWITCHING FREQ-MAX, PQCC32
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