參數(shù)資料
型號(hào)： LTC3831IGN
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, PLASTIC, SSOP-16
文件頁(yè)數(shù)： 14/20頁(yè)
文件大?。?/td> 208K
代理商： LTC3831IGN
LTC3831
3
3831fb
ELECTRICAL CHARACTERISTICS
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: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specied.
Note 3: Supply current in normal operation is dominated by the current
needed to charge and discharge the external FET gates. This will vary with
the LTC3831 operating frequency, operating voltage and the external FETs
used.
Note 4: The LTC3831EGN is guaranteed to meet performance
specications from 0°C to 85°C. Specications over the –40°C to 85°C
operating temperature range are assured by design, characterization
and correlation with statistical process controls. The LTC 3831IGN is
guaranteed to meet performance specications over the full –40°C to 85°C
temperature range.
The
● denotes specications that apply over the full operating temperature
range, otherwise specications are at TA = 25°C. VCC, PVCC1, PVCC2 = 5V, VR+ = 2.5V, VR– = GND, unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCOMPMAX
Maximum VCOMP
VFB = 0V, PVCC1 = 8V
2.85
V
ΔfOSC/ΔIFREQSET
Frequency Adjustment
10
kHz/μA
AV
Error Amplier Open-Loop DC Gain
●
46
55
dB
gm
Error Amplier Transconductance
●
520
650
780
μmho
ICOMP
Error Amplier Output Sink/Source
Current
100
μA
IMAX
IMAX Sink Current
VIMAX = VCC
●
9
4
12
15
20
μA
IMAX Sink Current Tempco
VIMAX = VCC (Note 6)
3300
ppm/°C
VIH
SHDN Input High Voltage
●
2.4
V
VIL
SHDN Input Low Voltage
●
0.8
V
IIN
SHDN Input Current
VSHDN = VCC
●
0.1
1
μA
ISS
Soft-Start Current
VSS = 0V, VIMAX = 0V, VIFB = VCC
●
–8
–12
–16
μA
ISSIL
Maximum Soft-Start Sink Current
Undercurrent Limit
VIMAX = VCC, VIFB = 0V, VSS = VCC (Note 8),
PVCC1 = 8V
1.6
mA
R+
R+ Input Resistance
49.5
kΩ
tr, tf
Driver Rise/Fall Time
Figure 2, PVCC1 = PVCC2 = 5V (Note 5)
●
80
250
ns
tNOV
Driver Nonoverlap Time
Figure 2, PVCC1 = PVCC2 = 5V (Note 5)
●
25
120
250
ns
DCMAX
Maximum TG Duty Cycle
Figure 2, VFB = 0V (Note 5), PVCC1 = 8V
●
91
95
%
Note 5: Rise and fall times are measured using 10% and 90% levels. Duty
cycle and nonoverlap times are measured using 50% levels.
Note 6: Guaranteed by design, not subject to test.
Note 7: PVCC1 must be higher than VCC by at least 2.5V for TG to operate
at 95% maximum duty cycle and for the current limit protection circuit to
be active.
Note 8: The current limiting amplier can sink but cannot source current.
Under normal (not current limited) operation, the output current will be
zero.
Note 9: This IC includes overtemperature protection that is intended to protect
the device during momentary overload conditions. Junction temperature
will exceed 125°C when overtemperature protection is active. Continuous
operation above the specied maximum operating junction temperature may
impair device reliability.
相關(guān)PDF資料
PDF描述
LTC3833IUDC#PBF SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20
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LTC3833EUDC#TRPBF SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20
LTC3833EUDC#PBF SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20
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