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參數(shù)資料
| 型號(hào)： | LT1952MPGN#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大小： | 357K |
| 代理商： | LT1952MPGN#TRPBF |
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LT1952/LT1952-1
5
19521fe
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: The LT1952/LT1952-1 are tested under pulsed load conditions
such that TJ ≈ TA. The LT1952EGN/LT1952EGN-1 are guaranteed to meet
performance specifications from 0°C to 125°C junction temperature.
Specifications over the –40°C to 125°C operating junction temperature
range are assured by design, characterization and correlation with
statistical process controls. The LT1952IGN/LT1952IGN-1 are guaranteed
over the –40°C to 125°C operating junction temperature range and the
LT1952MPGN/LT1952MPGN-1 are tested and guaranteed over the full
–55°C to 125°C operating junction temperature range. Note that the
maximum ambient temperature consistent with these specifications is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors.
Note 3: Rise and Fall times are measured at 10% and 90% levels.
Note 4: Guaranteed by correlation to static test.
Note 5: Each IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when over-temperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 6: Guaranteed but not tested.
Note 7: Maximum recommended SYNC frequency = 500kHz.
Note 8: In applications where the VIN pin is supplied via an external RC
network from a SYSTEM VIN > 25V, an external zener with clamp voltage
VIN ON(MAX) < VZ < 25V should be connected from the VIN pin to ground.
Note 9: VIN start-up current is measured at VIN = VIN ON – 0.25V and
scaled by x 1.18 (to correlate to worst case VIN start-up current at VIN ON).
Note 10: Timing for R = 40k derived from measurement with R = 240k.
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). COMP = open, FB = 1.4V, ROSC = 178k, SYNC = 0V,
SS_MAXDC = VREF, VREF = 0.1F, SD_VSEC = 2V, BLANK = 121k, DELAY = 121k, ISENSE = 0V, OC = 0V, OUT = 1nF, VIN = 15V, SOUT =
open, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SOFT-START
SS_MAXDC Low Level: VOL
I(SS_MAXDC) = 150A, OC = 1V
0.2
V
SS_MAXDC Soft-Start Reset Threshold
Measured on SS_MAXDC
0.45
V
SS_MAXDC Active Threshold
FB = 1V, DC > 0%
0.8
V
SS_MAXDC Input Current (Soft-Start Pull-Down: Idis) SS_MAXDC = 1V, SD_VSEC = 1.4V, OC = 1V
800
A
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