參數(shù)資料
型號： LTC4269IDKD-2#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO32
封裝： 7 X 4 MM, PLASTIC, M0-229, DFN-32
文件頁數(shù)： 29/34頁
文件大小： 383K
代理商： LTC4269IDKD-2#TR
LTC4269-2
42692fb
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
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)
l
14.25
15.75
V
VIN(OFF)
l
8.75
9.25
V
VIN(HYST)
l
3.75
5.5
7.0
V
VREF
Output Voltage
IVREF = 0
l
2.425
2.5
2.575
V
Line Regulation
IVREF = 0, 10V < VIN < 25V
1
10
mV
Load Regulation
0mA < IVREF < 2.5mA
1
10
mV
Oscillator
Frequency, fOSC
ROSC = 178k, FB = 1V, SS_MAXDC = 1.84V
l
165
200
240
kHz
fOSC(MIN)
ROSC = 365k, FB = 1V
80
100
120
kHz
fOSC(MAX)
ROSC = 64.9k, COMP = 2.5V, SD_VSEC = 2.64V
440
500
560
kHz
SYNC Input Resistance
18
kΩ
SYNC Switching Threshold
FB = 1V
1.5
2.2
V
SYNC Frequency/fOSC
FB = 1V (Note 14)
1.25
1.5
fOSC Line Regulation
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 15)
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, ICOMP = –250A
2.7
3.2
V
COMP Active Threshold
FB = 1V, SOUT Duty Cycle > 0%
0.7
0.8
V
COMP Low Level VOL
ICOMP = 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%)
COMP = 2.5V, FB = 1V (Note 12)
–8
A
ISENSE Input Current (Duty Cycle = 80%)
COMP = 2.5V, FB = 1V (Note 12)
–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 16)
180
ns
Adjustable Blanking Time
COMP = 2.5V, FB = 1V, RBLANK = 120k
540
ns
VBLANK
1
V
SOUT Driver
SOUT Clamp Voltage
IGATE = 0A, COMP = 2.5V, FB = 1V
10.54
12
13.5
V
SOUT Low Level
IGATE = 25mA
0.5
0.75
V
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