LTC1702AIGN 查看數據表（PDF） - Linear Technology
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LTC1702AIGN Datasheet PDF : 36 Pages
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LTC1702A
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VCC = 5V unless otherwise specified. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
VFCB
∆VFCB
IFCB
VRUN
ISS
FCB Threshold
FCB Feedback Hysteresis
FCB Pin Current
RUN/SS Pin RUN Threshold
Soft-Start Source Current
Maximum Soft-Start Sink Current
IMAX
IMAX Source Current
Switching Characteristics
RUN/SSn = 0V
VIMAX = 0V, VSW = – 0.5V
VIMAX = 0V
● 0.75
0.8
0.85
V
20
mV
●
±0.001 ±1
µA
● 0.45 0.55 0.65
V
–2
– 3.5
–6
µA
1
mA
● –12 –10
–8
µA
fOSC
Oscillator Frequency
ΦOSC2
Converter 2 Oscillator Phase
DCMIN
Minimum Duty Cycle
DCMAX
Maximum Duty Cycle
tNOV
Driver Nonoverlap
tr, tf
Driver Rise/Fall Time
Feedback Amplifier
Test Circuit 1, CL = 0pF
Relative to Converter 1 (Note 6)
● 475
550
750
kHz
180
DEG
●
0
%
● 87
90
93
%
Test Circuit 1, CL = 2000pF (Note 7)
●
Test Circuit 1, CL = 2000pF (Note 7)
●
40
100
ns
12
80
ns
AVFB
FB DC Gain
GBW
FB Gain Bandwidth
● 74
85
dB
25
MHz
IERR
FB Sink/Source Current
Status Outputs
● ±3
± 10
mA
VPGOOD
VOLPG
IPGOOD
tPGOOD
VFAULT
VOLF
IFAULT
tFAULT
PGOOD Trip Point
PGOOD Output Low Voltage
PGOOD Output Leakage
PGOOD Delay Time
FAULT Trip Point
FAULT Output Low Voltage
FAULT Output Current
FAULT Delay Time
VFB Relative to Regulated VOUT
PGOOD = 1mA
● –10
–5
–2
%
●
0.03
0.1
V
●
±0.1
±1
µA
VFB < VPGOOD to PGOOD (Note 7)
100
µs
VFB Relative to Regulated VOUT
● 10
15
20
%
IFAULT = 1mA
●
0.03
0.1
V
VFAULT = 0V
– 10
µA
VFB > VFAULT to FAULT (Note 7)
25
µs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: PVCC and BVCC (VBOOST – VSW) must be greater than VGS(ON) of
the external MOSFETs used to ensure proper operation.
Note 3: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 4: Supply current in normal operation is dominated by the current
needed to charge and discharge the external MOSFET gates. This current
will vary with supply voltage and the external MOSFETs used.
Note 5: Supply current in shutdown is dominated by external MOSFET
leakage and may be significantly higher than the quiescent current drawn
by the LTC1702A, especially at elevated temperature.
Note 6: This parameter is guaranteed by correlation and is not tested
directly.
Note 7: Rise and fall times are measured using 10% and 90% levels. Delay
and nonoverlap times are measured using 50% levels.
1702afa
3
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