LTC3707 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC3707' PDF : 32 Pages View PDF
LTC3707
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
VSTBYMD KA Keep-Alive Power On-Threshold
VSTBYMD Ramping Up, RUNSS1, 2 = 0V
DFMAX
Maximum Duty Factor
In Dropout
IRUN/SS1, 2
Soft-Start Charge Current
VRUN/SS1, 2 = 1.9V
VRUN/SS1, 2 ON RUN/SS Pin ON Threshold
VRUN/SS1, VRUN/SS2 Rising
VRUN/SS1, 2 LT RUN/SS Pin Latchoff Arming Threshold VRUN/SS1, VRUN/SS2 Rising from 3V
ISCL1, 2
RUN/SS Discharge Current
Soft Short Condition VOSENSE1, 2 = 0.5V;
VRUN/SS1, 2 = 4.5V
ISDLHO
Shutdown Latch Disable Current
VOSENSE1, 2 = 0.5V
VSENSE(MAX) Maximum Current Sense Threshold
VOSENSE1, 2 = 0.7V,VSENSE1–, 2– = 5V
1.5
2
V
98
99.4
%
0.5
1.2
µA
1.0
1.5
2.0
V
4.1
4.75
V
0.5
2
4
µA
1.6
5
µA
65
75
85
mV
q 62
75
88
mV
TG1, 2 tr
TG1, 2 tf
BG1, 2 tr
BG1, 2 tf
TG/BG t1D
TG Transition Time:
Rise Time
Fall Time
BG Transition Time:
Rise Time
Fall Time
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
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
(Note 6)
CLOAD = 3300pF
CLOAD = 3300pF
(Note 6)
CLOAD = 3300pF
CLOAD = 3300pF
CLOAD = 3300pF Each Driver
CLOAD = 3300pF Each Driver
Tested with a Square Wave (Note 7)
6V < VIN < 30V, VEXTVCC = 4V
ICC = 0 to 20mA, VEXTVCC = 4V
ICC = 20mA, VEXTVCC = 5V
ICC = 20mA, EXTVCC Ramping Positive
60
110
ns
60
110
ns
50
110
ns
50
100
ns
80
ns
80
ns
180
ns
4.8
5.0
5.2
V
0.2
2.0
%
100 200
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 8)
VFREQSET = 0V
VFREQSET = 2.4V
VFREQSET = 0V
190 220 250
kHz
120 140 160
kHz
280 310 360
kHz
–2
–1
µA
V3.3OUT
3.3V Regulator Output Voltage
V3.3IL
3.3V Regulator Load Regulation
V3.3VL
3.3V Regulator Line Regulation
PGOOD Output
No Load
I3.3 = 0 to 10mA
6V < VIN < 30V
q 3.20 3.35 3.45
V
0.5
2
%
0.05
0.2
%
VPGL
IPGOOD
VPG
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level, Either Controller
IPGOOD = 2mA
VPGOOD = 5V
VOSENSE Respect to Set Output Voltage
VOSENSE Ramping Negative
VOSENSE Ramping Positive
0.1
0.3
V
1
µA
–6
–7.5 – 9.5
%
6
7.5
9.5
%
3707f
3
Share Link: 
