參數(shù)資料
型號: 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): 22/28頁
文件大?。?/td> 357K
代理商: LT1952MPGN#TRPBF
LT1952/LT1952-1
3
19521fe
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PWM CONTROLLER
Operational Input Voltage
I(VREF) = 0A
l
VIN OFF
25
V
VIN Quiescent Current
I(VREF) = 0A, ISENSE = OC = Open
5.2
6.5
mA
VIN Start-up Current (LT1952)
FB = 0V, SS_MAXDC = 0V (Notes 4, 9)
l
460
700
A
VIN Start-up Current (LT1952-1)
FB = 0V, SS_MAXDC = 0V (Notes 4, 9)
l
400
575
A
VIN Shutdown Current
SD_VSEC = 0V
240
350
A
SD_VSEC Threshold
10V < VIN < 25V
l
1.261
1.32
1.379
V
SD_VSEC (ON) Current
SD_VSEC = SD_VSEC Threshold + 100mV
0
A
SD_VSEC (OFF) Current
SD_VSEC = SD_VSEC Threshold – 100mV
8.3
10
11.7
A
VIN ON (LT1952)
l
14.25
15.75
V
VIN OFF (LT1952)
l
8.75
9.25
V
VIN HYSTERESIS (LT1952)
l
3.75
5.5
6.75
V
VIN ON (LT1952-1)
E-, I-Grades
MP-Grade
l
7.75
8.13
8.3
V
VIN OFF (LT1952-1)
l
6.5
6.82
V
VIN HYSTERESIS (LT1952-1)
l
0.95
1.25
V
VREF
Output Voltage
I(VREF) = 0A
l
2.425
2.5
2.575
V
Line Regulation
I(VREF) = 0A, 10V < VIN < 25V
1
10
mV
Load Regulation
0A < I(VREF) < 2.5mA
1
10
mV
OSCILLATOR
Frequency: fOSC
ROSC = 178k, FB = 1V, SS_MAXDC = 1.84V
l
165
200
240
kHz
Minimum Programmable fOSC
Maximum Programmable fOSC
ROSC = 365k, FB = 1V
ROSC = 64.9k, COMP = 2.5V, SD_VSEC = 2.64V
80
440
100
500
120
560
kHz
SYNC Input Resistance
18
SYNC Switching Threshold
FB = 1V
1.5
2.2
V
SYNC Frequency/fOSC
FB = 1V (Note 7)
1.25
1.5
fOSC Line Reg
FB = 1V, ROSC = 178k; 10V < VIN < 25V,
SS_MAXDC = 1.84V
0.05
0.33
%/V
VROSC
ROSC Pin voltage
1
V
ERROR AMPLIFIER
FB Reference Voltage
10V < VIN < 25V, VOL + 0.2V < COMP < VOH – 0.2 l
1.201
1.226
1.250
V
FB Input Bias Current
FB = FB Reference Voltage
–75
–200
nA
Open Loop Voltage Gain
VOL + 0.2V < COMP < VOH – 0.2
65
85
dB
Unity Gain Bandwidth
(Note 6)
3
MHz
COMP Source Current
FB = 1V, COMP = 1.6V
–4
–9
mA
COMP Sink Current
COMP = 1.6V
4
10
mA
COMP Current (Disabled)
FB = VREF, COMP = 1.6V
18
23
28
A
COMP High Level: VOH
FB = 1V, I(COMP) = –250A
2.7
3.2
V
COMP Active Threshold
FB = 1V, SOUT Duty Cycle > 0 %
0.7
0.8
V
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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