參數(shù)資料
型號: LT1952MPGN#PBF
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): 23/28頁
文件大?。?/td> 357K
代理商: LT1952MPGN#PBF
LT1952/LT1952-1
4
19521fe
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
COMP Low Level: VOL
I(COMP) = 250A
0.15
0.4
V
CURRENT SENSE
ISENSE Maximum Threshold
COMP = 2.5V, FB = 1V
197
220
243
mV
ISENSE Input Current (Duty Cycle = 0%)
ISENSE Input Current (Duty Cycle = 80%)
COMP = 2.5V, FB = 1V (Note 4)
–8
–35
A
OC Threshold
COMP = 2.5V, FB = 1V
98
107
116
mV
OC Input Current
(OC = 100mV)
–50
–100
nA
Default Blanking Time
COMP = 2.5V, FB = 1V, RBLANK = 40k (Note 10)
180
ns
Adjustable Blanking Time
COMP = 2.5V, FB = 1V, RBLANK = 120k
540
ns
VBLANK
1
V
SOUT DRIVER
SOUT Clamp Voltage
I(GATE) = 0A, COMP = 2.5V, FB = 1V
10.5
12
13.5
V
SOUT Low Level
I(GATE) = 25mA
0.5
0.75
V
SOUT High Level
I(GATE) = –25mA, VIN = 12V, COMP = 2.5V,
FB = 1V
10
V
SOUT Active Pull-Off in Shutdown
VIN = 5V, SD_VSEC = 0V, SOUT = 1V
1
mA
SOUT to OUT (Rise) DELAY (tDELAY)
COMP = 2.5V, FB = 1V (Note 10)
RDELAY = 120k
40
120
ns
VDELAY
0.9
V
OUT DRIVER
OUT Rise Time
FB = 1V, CL = 1nF (Notes 3, 6)
50
ns
OUT Fall Time
FB = 1V, CL = 1nF (Notes 3, 6)
30
ns
OUT Clamp Voltage
I(GATE) = 0A, COMP = 2.5V, FB = 1V
11.5
13
14.5
V
OUT Low Level
I(GATE) = 20mA
I(GATE) = 200mA
0.45
1.25
0.75
1.8
V
OUT High Level
I(GATE) = –20mA, VIN = 12V, COMP = 2.5V,
FB = 1V
I(GATE) = –200mA, VIN = 12V, COMP = 2.5V,
FB = 1V
9.9
9.75
V
OUT Active Pull-Off in Shutdown
VIN = 5V, SD_VSEC = 0V, OUT = 1V
20
mA
OUT Max Duty Cycle
COMP = 2.5V, FB = 1V, RDELAY = 10k
(fOSC = 200kHz), VIN = 10V
SD_VSEC = 1.4V, SS_MAXDC = VREF
83
90
%
OUT Max Duty Cycle Clamp
COMP = 2.5V, FB = 1V, RDELAY = 10k
(fOSC = 200kHz), VIN = 10V
SD_VSEC = 1.32V, SS_MAXDC = 1.84V
SD_VSEC = 2.64V, SS_MAXDC = 1.84V
63.5
25
72
33
80.5
41
%
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
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