LTC3709EUH 查看數據表（PDF） - Linear Technology
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LTC3709EUH
Linear Technology
LTC3709EUH Datasheet PDF : 24 Pages
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LTC3709
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = DRVCC = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Main Control Loop
IQ
Input DC Supply Current
Normal
Shutdown
2.4
3
25
65
IFB
VFB
∆VFB(LINEREG)
∆VFB(LOADREG)
gm(EA)
tON
FB Pin Input Current
Feedback Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Error Amplifier Transconductance
On-Time
tON(MIN)
tOFF(MIN)
VSENSE(MAX)
Minimum On-Time
Minimum Off-Time
Maximum Current Sense Threshold
VSENSE(MIN) Minimum Current Sense Threshold
∆VFB(OV)
∆VFB(UV)
VRUN/SS(ON)
VRUN/SS(LE)
VRUN/SS(LT)
IRUN/SS(C)
IRUN/SS(D)
UVLO
UVLO(HYS)
TG RUP
TG RDOWN
BG RUP
BG RDOWN
Tracking
Overvoltage Fault Threshold
Undervoltage 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 Hysteresis
TG Driver Pull-Up On-Resistance
TG Driver Pull-Down On-Resistance
BG Driver Pull-Up On-Resistance
BG Driver Pull-Down On-Resistance
ITH = 1.2V (Note 3)
ITH = 1.2V (Note 3)
VCC = 4.5V to 6.5V (Note 3)
ITH = 0.5V to 2V (Note 3)
ITH = 1.2V (Note 3)
ION = 180µA, VFCB = 0V
ION = 90µA, VFCB = 0V
ION = 540µA
ION = 90µA
VRNG = 1V
VRNG = 0V
VRNG = VCC
VRNG = 1V
VRNG = 0V
VRNG = VCC
RUN/SS Pin Rising
RUN/SS Pin Falling
VCC Falling
Measured at VCC Pin
TG High (Note 5)
TG Low (Note 5)
BG High (Note 5)
BG Low (Note 5)
● 0.594
1.3
90
180
124
86
177
8.5
– 8.5
● 0.8
– 0.5
0.8
– 35
0.600
0.02
– 0.12
1.45
116
233
45
250
144
101
202
– 60
– 40
– 80
10
– 10
1.4
3
2.3
– 1.2
2
3.9
0.2
2
1.5
3
1.5
– 60
0.606
– 0.2
1.6
140
280
100
350
166
119
234
12.5
– 12.5
2
–3
4
4.2
0.35
ITRACK
VFB(TRACK)
TRACK Pin Input Current
Feedback Voltage at Tracking
PGOOD Output
ITH = 1.2V, VTRACK = 0.2V (Note 3)
VTRACK = 0.1V, ITH = 1.2V (Note 3)
VTRACK = 0.3V, ITH = 1.2V (Note 3)
VTRACK = 0.5V, ITH = 1.2V (Note 3)
–100 –150
90
100 110
290 300 310
490 500 510
∆VFBH
∆VFBL
PG Delay
∆VFB(HYS)
IPGOOD
VPGL
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Delay
PGOOD Hysteresis
PGOOD Leakage Current
PGOOD Low Voltage
VFB Rising
VFB Falling
VFB Rising
VFB Returning
VPGOOD = 7V
IPGOOD = 5mA
8.5
10
12.5
– 8.5 – 10 – 12.5
100
3.5
±1
0.2
0.4
UNITS
mA
µA
nA
V
%/V
%
mS
ns
ns
ns
ns
mV
mV
mV
mV
mV
mV
%
%
V
V
V
µA
µA
V
V
Ω
Ω
Ω
Ω
nA
mV
mV
mV
%
%
µs
%
µA
V
3709fb
3
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