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LTC1430 데이터시트(PDF) 3 Page - Linear Technology

부품명 LTC1430
상세설명  High Power Step-Down Switching Regulator Controller
PDF  16 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC1430 데이터시트(HTML) 3 Page - Linear Technology

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3
LTC1430
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
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
specified.
Note 3: This parameter is guaranteed by correlation and is not tested
directly.
Note 4: Supply current in normal operation is dominated by the current
needed to charge and discharge the external FET gates. This will vary with
the LTC1430 operating frequency, operating voltage and the external FETs
used.
Note 5: The ILIM amplifier can sink but cannot source current. Under
normal (not current limited) operation, the ILIM output current will be zero.
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. (Note 2)
ELECTRICAL CHARACTERISTICS
VIH
SHDN Input High Voltage
q
2.4
V
VIL
SHDN Input Low Voltage
q
0.8
V
IIN
SHDN Input Current
q
±0.1
±1
µA
AV
Error Amplifier Open-Loop DC Gain
(LTC1430I)
q
40
48
dB
gmV
Error Amplifier Transconductance
(LTC1430C)
650
µMho
(LTC1430I)
q
300
650
1200
µMho
gmI
ILIM Amplifier Transconductance
(Note 5)
1300
µMho
IMAX
IMAX Sink Current
VI(MAX) = VCC (LTC1430C)
q
812
16
µA
VI(MAX) = VCC (LTC1430I)
q
812
17
µA
ISS
Soft-Start Source Current
VSS = 0 (LTC1430C)
q
–8
–12
–16
µA
VSS = 0 (LTC1430I)
q
–8
–12
–17
µA
tr, ts
Driver Rise/Fall Time
Figure 3, PVCC1 = PVCC2 = 5V
80
250
ns
tNOV
Driver Non-Overlap Time
Figure 3, PVCC1 = PVCC2 = 5V
25
130
250
ns
DCMAX
Maximum Duty Cycle
VCOMP = VCC (LTC1430C)
q
90
96
%
VCOMP = VCC, VFB = 0 (LTC1430I)
q
90
96
%
VCOMP = VCC, VFB = 1.265V (LTC1430I)
q
83
88
%



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