LTC1708EG-PG 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LTC1708EG-PG
Linear Technology
LTC1708EG-PG Datasheet PDF : 32 Pages
| |||
LTC1708-PG
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VOV
Output Overvoltage Threshold
Measured at EAIN1, 2
0.84 0.86 0.88
V
ISENSE
Sense Pins Total Source Current
(Each Channel); VSENSE1–, 2– = VSENSE1+, 2+ = 0V
– 85 – 60
µA
VSTBYMD MS Master Shutdown Threshold
VSTBYMD Ramping Down
0.4
0.6
V
VSTBYMD KA Keep-Alive Power On-Threshold
VSTBYMD Ramping Up, RUNSS1, 2 = 0V
1.5
2
V
DFMAX
Maximum Duty Factor
In Dropout
98
99.4
%
IRUN/SS1, 2
Soft-Start Charge Current
VRUN/SS1, 2 = 1.9V
0.5
1.2
µA
VRUN/SS1, 2 ON RUN/SS Pin ON Threshold
VRUN/SS1, VRUN/SS2 Rising
1.0
1.5
1.9
V
VRUN/SS1, 2 LT RUN/SS Pin Latchoff Threshold
VRUN/SS1, VRUN/SS2 Rising from 3V
4.1
4.5
V
ISCL1, 2
RUN/SS Discharge Current
Soft Short Condition EAIN1, 2 = 0.5V;
VRUN/SS1, 2 = 4.5V
0.5
2
4
µA
ISDLHO
Shutdown Latch Disable Current
EAIN1, 2 = 0.5V
1.6
5
µA
VSENSE(MAX) Maximum Current Sense Threshold
VEAIN1, 2 = 0.7V; VSENSE1, 2 = 5V
VEAIN1, 2 = 0.7V; VSENSE1, 2 = 5V
65
75
85
mV
q 62
75
88
mV
TG1, 2 tr
TG1, 2 tf
TG Transition Time:
Rise Time
Fall Time
CLOAD = 3300pF (Note 10)
CLOAD = 3300pF (Note 10)
50
90
ns
50
90
ns
BG1, 2 tr
BG1, 2 tf
BG Transition Time:
Rise Time
Fall Time
CLOAD = 3300pF (Note 10)
CLOAD = 3300pF (Note 10)
40
90
ns
40
80
ns
TG/BG t1D
Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver (Note 10)
Synchronous Switch-On Delay Time
90
ns
BG/TG t2D
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
tON(MIN)
Minimum On-Time
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
VLDO INT
INTVCC Load Regulation
VLDO EXT
EXTVCC Voltage Drop
VEXTVCC
EXTVCC Switchover Voltage
VLDOHYS
EXTVCC Hysteresis
Oscillator
CLOAD = 3300pF Each Driver (Note 10)
Tested with a Square Wave (Notes 6, 10)
6V < VIN < 30V, VEXTVCC = 4V
ICC = 0 to 20mA, VEXTVCC = 4V
ICC = 20mA, VEXTVCC = 5V
ICC = 20mA, EXTVCC Ramping Positive
90
ns
160 200
ns
4.8
5.0
5.2
V
0.2
1.0
%
120 240
mV
q 4.5
4.7
V
0.2
V
fOSC
Oscillator Frequency
fLOW
Lowest Frequency
fHIGH
Highest Frequency
IFREQSET
FREQSET Input Current
3.3V Linear Regulator
VFREQSET = Open (Note 7)
VFREQSET = 0V
VFREQSET = 2.4V
VFREQSET = 0V
190
220
250
kHz
120 140 170
kHz
280 310 350
kHz
–2
–1
µA
V3.3OUT
V3.3IL
V3.3VL
PGOOD Output
3.3V Regulator Output Voltage
3.3V Regulator Load Regulation
3.3V Regulator Line Regulation
No Load
I3.3 = 0 to 10mA
6V < VIN < 30V
q 3.25 3.35 3.45
V
0.5
2
%
0.05
0.2
%
VPGL
IPGOOD
VPG
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
IPGOOD = 2mA
0.1
0.3
V
VPGOOD = 5V
1
µA
Relative to the 0.8V Regulated Feedback Voltage
EAIN1, 2 Ramping Negative from 0.8V
– 10 – 7.5
–5
%
EAIN1, 2 Ramping Positive from 0.8V
5
7.5
10
%
1708f
3
Share Link: