LTC3608(RevC) Просмотр технического описания (PDF) - Linear Technology
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LTC3608 Datasheet PDF : 26 Pages
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LTC3608
Electrical Characteristics The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Main Control Loop
SVIN
Operating Input Voltage Range
IQ
Input DC Supply Current
Normal
Shutdown Supply Current
4
18
900 2000
15
30
VFB
ΔVFB(LINEREG)
ΔVFB(LOADREG)
IFB
gm(EA)
VFCB
IFCB
tON
tON(MIN)
tOFF(MIN)
IVALLEY(MAX)
IVALLEY(MIN)
ΔVFB(OV)
VRUN/SS(ON)
VRUN/SS(LE)
VRUN/SS(LT)
IRUN/SS(C)
IRUN/SS(D)
VIN(UVLO)
VIN(UVLOR)
RDS(ON)
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Input Current
Error Amplifier Transconductance
Forced Continuous Threshold
Forced Continuous Pin Current
On-Time
Minimum On-Time
Minimum Off-Time
Maximum Valley Current
Maximum Reverse Valley Current
Output Overvoltage Fault Threshold
RUN Pin Start Threshold
RUN Pin Latchoff Enable Threshold
RUN Pin Latchoff Threshold
Soft-Start Charge Current
Soft-Start Discharge Current
Undervoltage Lockout
Undervoltage Lockout Release
Top Switch On-Resistance
Bottom Switch On-Resistance
ITH = 1.2V, –40°C to 85°C (Note 3)
ITH = 1.2V, –40°C to 125°C (Note 3)
VIN = 4V to 18V, ITH = 1.2V (Note 3)
ITH = 0.5V to 1.9V (Note 3)
VFB = 0.6V
ITH = 1.2V (Note 3)
VFCB = 0.6V
ION = 60µA, VON = 1.5V
ION = 60µA, VON = 0V
ION = 180µA, VON = 0V
ION = 30µA, VON = 1.5V
VRNG = 0.5V, VFB = 0.56V, FCB = 0V
VRNG = 0V, VFB = 0.56V, FCB = 0V
VRNG = 0.5V, VFB = 0.64V, FCB = 0V
VRNG = 0V, VFB = 0.64V, FCB = 0V
RUN/SS Pin Rising
RUN/SS Pin Falling
VRUN/SS = 0V
VRUN/SS = 4.5V, VFB = 0V
INTVCC Falling
INTVCC Rising
0.594
l 0.590
l 1.4
l 0.54
220
l
5
l
8
7
l 0.8
–0.5
0.8
l
l
0.600
0.600
0.002
–0.05
–5
1.7
0.6
–1
280
110
60
320
11
16
5.5
7.5
10
1.5
4
3.5
–1.2
1.8
3.4
3.5
10
8
0.606
0.610
–0.3
±50
2
0.66
–2
340
100
500
13
2
4.5
4.2
–3
3
3.9
4
19
14
UNITS
V
µA
µA
V
V
%/V
%
nA
mS
V
µA
ns
ns
ns
ns
A
A
A
A
%
V
V
V
µA
µA
V
V
mΩ
mΩ
3608fc
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