參數(shù)資料
型號: LTC1871EMS#TR-1
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): 31/36頁
文件大?。?/td> 354K
代理商: LTC1871EMS#TR-1
4
LTC1871-1
18711fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
FB Voltage vs Temp
FB Voltage Line Regulation
FB Pin Current vs Temperature
TEMPERATURE (
°C)
–50
FB
VOLTAGE
(V)
1.23
1.24
150
1871 G01
1.22
1.21
0
50
100
–25
25
75
125
1.25
VIN (V)
0
1.229
FB
VOLTAGE
(V)
1.230
1.231
510
15
20
1871 G02
25
30
35
TEMPERATURE (
°C)
–50
0
FB
PIN
CURRENT
(nA)
10
20
30
40
60
–25
25
0
50
100
75
1871 G03
125 150
50
Shutdown Mode IQ vs VIN
Burst Mode IQ vs VIN
VIN (V)
0
SHUTDOWN
MODE
I
Q
(
μ
A)
10
20
10
20
30
40
1871 G04
30
Shutdown Mode IQ vs Temperature
TEMPERATURE (
°C)
–50
0
SHUTDOWN
MODE
I
Q
(
μ
A)
5
10
15
20
–25
0
25
50
1871 G05
75
100 125 150
VIN = 5V
VIN (V)
0
Burst
Mode
I
Q
(
μ
A)
100
200
300
400
600
10
20
1871 G06
30
40
500
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 LTC1871E-1 is guaranteed to meet performance specifications
from 0
°C to 85°C junction temperature. Specifications over the –40°C to
85
°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC1871I-1 is guaranteed over the full –40
°C to 125°C operating junction
temperature range.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD 110°C/W)
Note 4: The dynamic input supply current is higher due to power MOSFET
gate charging (QG fOSC). See Applications Information.
Note 5: The LTC1871-1 is tested in a feedback loop which servos VFB to
the reference voltage with the ITH pin forced to the midpoint of its voltage
range (0.3V
≤ VITH ≤ 1.2V, midpoint = 0.75V).
Note 6: In a synchronized application, the internal slope compensation
gain is increased by 25%. Synchronizing to a significantly higher ratio will
reduce the effective amount of slope compensation, which could result in
subharmonic oscillation for duty cycles greater than 50%.
Note 7: Rise and fall times are measured at 10% and 90% levels.
ELECTRICAL CHARACTERISTICS
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