参数资料
型号: LTC3109EGN#PBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: 0.026 A SWITCHING REGULATOR, PDSO20
封装: 0.150 INCH, LEAD FREE, PLASTIC, SSOP-20
文件页数: 19/24页
文件大小: 329K
代理商: LTC3109EGN#PBF
LTC3109
3109f
Typical perForMance characTerisTics
elecTrical characTerisTics
board layout, the rated thermal package thermal resistance and other
environmental factors. The junction temperature (TJ) is calculated from
the ambient temperature (TA) and power dissipation (PD) according to
the formula: TJ = TA + (PD θJA°C/W), where θJA is the package thermal
impedance.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Current measurements are made when the output is not switching.
Note 5: Failure to solder the exposed backside of the QFN package to the
PC board ground plane will result in a thermal resistance much higher
than 37°C/W.
Note 6: The Absolute Maximum Rating is a DC rating. Under certain
conditions in the applications shown, the peak AC voltage on the C2A and
C2B pins may exceed ±8V. This behavior is normal and acceptable because
the current into the pin is limited by the impedance of the coupling
capacitor.
Input Resistance vs VIN
Efficiency vs VIN
Open-Circuit Start-Up Voltage
vs Source Resistance
IIN vs VIN
IVOUT vs VIN
VIN (mV)
10
1
I IN
(mA)
10
100
1000
100
1000
3109 G01
1:100 RATIO, C1 = 1nF
1:50 RATIO, C1 = 4.7nF
1:20 RATIO, C1 = 10nF
VOUT = 0V
VIN (mV)
10
I VOUT
(A)
100
1000
10000
100
1000
3109 G02
1:100 RATIO, C1 = 1nF
1:50 RATIO, C1 = 4.7nF
1:20 RATIO, C1 = 10nF
VOUT = 3.3V
NO LOAD ON VLDO
VIN (mV)
10
2.0
R
IN
()
3.0
4.0
5.0
6.0
100
1000
3109 G03
7.0
2.5
3.5
4.5
5.5
6.5
1:100 RATIO, C1 = 1nF
1:50 RATIO, C1 = 4.7nF
1:20 RATIO, C1 = 10nF
VOUT = 0V
SOURCE RESISTANCE ()
0
V ST
AR
TUP
(OPEN
CIRCUIT)
(mV)
10
30
40
50
6
7
8
9
90
3109 G05
20
1
2
3
4
5
10
60
70
80
VIN (mV)
10
0
EFFICIENCY
(%)
10
20
30
40
100
1000
3109 G04
50
5
15
25
35
45
1:100 RATIO, C1 = 1nF
1:50 RATIO, C1 = 4.7nF
1:20 RATIO, C1 = 10nF
VOUT = 0V
TA = 25°C, unless otherwise noted.
VIN (mV)
10
0.1
P VOUT
(mW)
1
10
100
1000
3109 G18
1:50 RATIO
C1 = 4.7nF
VOUT = 5V
VOUT = 3.3V
PVOUT vs VIN
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