參數(shù)資料
型號(hào)： LTC3731HUH#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 5 A SWITCHING CONTROLLER, 750 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32
文件頁(yè)數(shù)： 23/34頁(yè)
文件大?。?/td> 427K
代理商： LTC3731HUH#PBF
LTC3731H
3731Hfb
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VRUN/SS = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loop
VREGULATED Regulated Voltage at EAIN
VITH = 1.2V (Note 3)
l
0.594
0.590
0.600
0.606
0.614
V
VSENSEMAX Maximum Current Sense Threshold
VEAIN = 0.5V, VITH Open,
VSENSE1–, VSENSE2–, VSENSE3– = 0.6V, 1.8V
l
65
60
75
85
90
mV
IMATCH
Maximum Current Threshold Match
Worst-Case Error at VSENSEMAX
–5
5
%
VLOADREG
Output Voltage Load Regulation
(Note 3)
Measured in Servo Loop, ITH Voltage = 1.2V to 0.7V
Measured in Servo Loop, ITH Voltage = 1.2V to 2V
l
0.1
–0.1
0.7
–0.7
%
VREFLNREG Output Voltage Line Regulation
VCC = 4.5V to 7V
0.03
%/V
gm
Transconductance Amplifier gm
ITH = 1.2V, Sink/Source 25A (Note 3)
l
3
5
7
mmho
gmOL
Transconductance Amplifier GBW
ITH = 1.2V (gm ZL, ZL = Series 1k – 100kΩ – 1nF)
3
MHz
VFCB
Forced Continuous Threshold
l
0.54
0.60
0.66
V
IFCB
FCB Bias Current
VFCB = 0.65V
0.2
0.7
A
VBINHIBIT
Burst Inhibit Threshold
Measured at FCB Pin
VCC – 1.5 VCC – 0.7 VCC – 0.3
V
UVR
Undervoltage RUN/SS Reset
VCC Lowered Until the RUN/SS Pin is Pulled Low
3.3
3.8
4.5
V
UVADJ
Undervoltage Lockout Threshold
1.13
1.18
1.23
V
IUVADJ
Undervoltage Bias Current
At UVADJ Threshold
0.2
50
nA
IQ
Input DC Supply Current
Normal Mode
Shutdown
(Note 4)
VCC = 5V
VRUN/SS = 0V
2.3
50
3.5
100
mA
A
IRUN/SS
Soft-Start Charge Current
VRUN/SS = 1.9V
–0.8
–1.5
–2.5
A
VRUN/SS
RUN/SS Pin ON Threshold
VRUN/SS, Ramping Positive
1
1.5
1.9
V
VRUN/SSARM RUN/SS Pin Arming Threshold
VRUN/SS, Ramping Positive Until Short-Circuit
Latch-Off is Armed
3.8
4.5
V
VRUN/SSLO
RUN/SS Pin Latch-Off Threshold
VRUN/SS, Ramping Negative
3.2
V
ISCL
RUN/SS Discharge Current
Soft-Short Condition VEAIN = 0.375V, VRUN/SS = 4.5V
–5
–1.5
A
ISDLHO
Shutdown Latch Disable Current
VEAIN = 0.375V, VRUN/SS = 4.5V
1.5
5
A
ISENSE
SENSE Pins Source Current
SENSE1+, SENSE1–, SENSE2+, SENSE2–, SENSE3+,
SENSE3– All Equal 1.2V; Current at Each Pin
13
20
A
DFMAX
Maximum Duty Factor
In Dropout, VSENSEMAX ≤ 30mV
95
98.5
%
TG tR, tF
Top Gate Rise Time
Top Gate Fall Time
CLOAD = 3300pF
30
40
90
ns
BG tR, tF
Bottom Gate Rise Time
Bottom Gate Fall Time
CLOAD = 3300pF
30
20
90
ns
TG/BG t1D
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
All Controllers, CLOAD = 3300pF Each Driver
50
ns
BG/TG t2D
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
All Controllers, CLOAD = 3300pF Each Driver
60
ns
tON(MIN)
Minimum On-Time
Tested with a Square Wave (Note 5)
110
ns
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