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參數(shù)資料
| 型號： | LT1871EMS-7 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 23/32頁 |
| 文件大?。?/td> | 461K |
| 代理商： | LT1871EMS-7 |
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LTC1871-7
3
18717fc
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 8V, VRUN = 1.5V, RFREQ = 80k, VMODE/SYNC = 0V, unless otherwise specied.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VRUN+
Rising RUN Input Threshold Voltage
1.348
V
VRUN–
Falling RUN Input Threshold Voltage
●
1.223
1.198
1.248
1.273
1.298
V
VRUN(HYST)
RUN Pin Input Threshold Hysteresis
50
100
150
mV
I-Grade (Note 2)
●
35
100
175
mV
IRUN
RUN Input Current
560
nA
VFB
Feedback Voltage
VITH = 0.2V (Note 5)
●
1.218
1.212
1.230
1.242
1.248
V
VITH = 0.2V (Note 5), I-Grade (Note 2)
●
1.205
1.255
V
IFB
FB Pin Input Current
VITH = 0.2V (Note 5)
18
60
nA
ΔVFB
ΔVIN
Line Regulation
6V ≤ VIN ≤ 30V
0.002
0.02
%/V
6V ≤ VIN ≤ 30V, I-Grade (Note 2)
●
0.002
0.02
%/V
ΔVFB
ΔVITH
Load Regulation
VMODE/SYNC = 0V, VITH = 0.5V to 0.9V (Note 5)
●
– 1
–0.1
%
VMODE/SYNC = 0V, VITH = 0.5V to 0.9V (Note 5)
I-Grade (Note 2)
●
– 1
–0.1
%
ΔVFB(OV)
ΔFB Pin, Overvoltage Lockout
VFB(OV) – VFB(NOM) in Percent
2.5
6
10
%
gm
Error Amplier Transconductance
ITH Pin Load = ±5μA (Note 5)
600
μmho
VITH(BURST)
Burst Mode Operation ITH Pin Voltage
Falling ITH Voltage (Note 5)
0.3
V
VSENSE(MAX)
Maximum Current Sense Input Threshold
Duty Cycle < 20%
120
150
180
mV
Duty Cycle < 20%, I-Grade (Note 2)
●
100
200
mV
ISENSE(ON)
SENSE Pin Current (GATE High)
VSENSE = 0V
35
70
μA
ISENSE(OFF)
SENSE Pin Current (GATE Low)
VSENSE = 30V
0.1
5
μA
Oscillator
fOSC
Oscillator Frequency
RFREQ = 80k
250
300
350
kHz
RFREQ = 80k, I-Grade (Note 2)
●
250
300
350
kHz
Oscillator Frequency Range
50
1000
kHz
I-Grade (Note 2)
●
50
1000
kHz
DMAX
Maximum Duty Cycle
87
92
97
%
I-Grade (Note 2)
●
87
92
98.5
%
fSYNC/fOSC
Recommended Maximum Synchronized
Frequency Ratio
fOSC = 300kHz (Note 6)
1.25
1.30
fOSC = 300kHz (Note 6), I-Grade (Note 2)
●
1.25
1.30
tSYNC(MIN)
MODE/SYNC Minimum Input Pulse Width
VSYNC = 0V to 5V
25
ns
tSYNC(MAX)
MODE/SYNC Maximum Input Pulse Width
VSYNC = 0V to 5V
0.8/fOSC
ns
VIL(MODE)
Low Level MODE/SYNC Input Voltage
0.3
V
I-Grade (Note 2)
●
0.3
V
VIH(MODE)
High Level MODE/SYNC Input Voltage
1.2
V
I-Grade (Note 2)
●
1.2
V
RMODE/SYNC
MODE/SYNC Input Pull-Down Resistance
50
kΩ
VFREQ
Nominal FREQ Pin Voltage
0.62
V
Low Dropout Regulator
VINTVCC
INTVCC Regulator Output Voltage
VIN = 8V
6.5
7
7.5
V
VIN = 8V, I-Grade (Note 2)
●
6.5
7
7.5
V
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相關(guān)代理商/技術(shù)參數(shù) |
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| LT1871EMS-7-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Input Voltage,Current Mode Boost, Flyback and SEPIC Controller |
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| LT1871IMS-7-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Input Voltage,Current Mode Boost, Flyback and SEPIC Controller |
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