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参数资料
| 型号： | LTC3108IDE#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.45 A SWITCHING REGULATOR, PDSO12 |
| 封装： | 4 X 3 MM, LEAD FREE, PLASTIC, MO-229WGED, DFN-12 |
| 文件页数： | 16/22页 |
| 文件大小： | 1300K |
| 代理商： | LTC3108IDE#PBF |
LTC3108
3108fa
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 LTC3108 is tested under pulsed load conditions such that TJ ≈
TA. The LTC3108E is guaranteed to meet specifications from 0°C to 85°C
junction temperature. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3108I is guaranteed
over the full –40°C to 125°C operating junction temperature range.
Note that the maximum ambient temperature is determined by specific
operating conditions in conjunction with 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: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
43°C/W.
Note 5: The absolute maximum rating is a DC rating. Under certain
conditions in the applications shown, the peak AC voltage on the C2 pin
may exceed ±8V. This behavior is normal and acceptable because the
current into the pin is limited by the impedance of the coupling capacitor.
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are for TA = 25°C (Note 2). VAUX = 5V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage
VS1 = VS2 = GND
VS1 = VAUX, VS2 = GND
VS1 = GND, VS2 = VAUX
VS1 = VS2 = VAUX
l
2.30
3.234
4.018
4.90
2.350
3.300
4.100
5.000
2.40
3.366
4.182
5.10
V
VOUT Quiescent Current
VOUT = 3.3V, VOUT2_EN = 0V
0.2
A
VAUX Quiescent Current
No Load, All Outputs Charged
6
9
A
LDO Output Voltage
0.5mA Load
l
2.134
2.2
2.266
V
LDO Load Regulation
For 0mA to 2mA Load
0.5
1
%
LDO Line Regulation
For VAUX from 2.5V to 5V
0.05
0.2
%
LDO Dropout Voltage
ILDO = 2mA
l
100
200
mV
LDO Current Limit
VLDO = 0V
l
4
11
mA
VOUT Current Limit
VOUT = 0V
l
2.8
4.5
7
mA
VSTORE Current Limit
VSTORE = 0V
l
2.8
4.5
7
mA
VAUX Clamp Voltage
Current into VAUX = 5mA
l
5
5.25
5.55
V
VSTORE Leakage Current
VSTORE = 5V
0.1
0.3
A
VOUT2 Leakage Current
VOUT2 = 0V, VOUT2_EN = 0V
0.1
A
VS1, VS2 Threshold Voltage
l
0.4
0.85
1.2
V
VS1, VS2 Input Current
VS1 = VS2 = 5V
0.01
0.1
A
PGOOD Threshold (Rising)
Measured Relative to the VOUT Voltage
–7.5
%
PGOOD Threshold (Falling)
Measured Relative to the VOUT Voltage
–9
%
PGOOD VOL
Sink Current = 100A
0.15
0.3
V
PGOOD VOH
Source Current = 0
2.1
2.2
2.3
V
PGOOD Pull-Up Resistance
1
MΩ
VOUT2_EN Threshold Voltage
VOUT2_EN Rising
l
0.4
1
1.3
V
VOUT2_EN Pull-Down Resistance
5
MΩ
VOUT2 Turn-On Time
5
s
VOUT2 Turn-Off Time
(Note 3)
0.15
s
VOUT2 Current Limit
VOUT = 3.3V
l
0.15
0.3
0.45
A
VOUT2 Current Limit Response Time
(Note 3)
350
ns
VOUT2 P-Channel MOSFET On-Resistance
VOUT = 3.3V (Note 3)
1.3
Ω
N-Channel MOSFET On-Resistance
C2 = 5V (Note 3)
0.5
Ω
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