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參數(shù)資料
| 型號： | LTC3672BEDC-2#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 2 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 165K |
| 代理商： | LTC3672BEDC-2#PBF |
LTC3672B-2
3
3672b2fa
ELECTRICAL CHARACTERISTICS
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 LTC3672B-2 is guaranteed to meet performance specications
from 0°C to 85°C. Specications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specied maximum operating junction
temperature may impair device reliability.
The
l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = VIN1 = 3.6V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RPD,BUCKOUT
BUCKOUT Pulldown Resistance in Shutdown VENALL = 0V
10
k
Ω
RPD,SW
SW Pulldown Resistance in Shutdown
VENALL = 0V
10
k
Ω
tSS,BUCK
Soft-Start Time
0.2
ms
LDO Regulator 1
VLDO1
Regulated Output Voltage
LDO1 Output, ILDO1 = 1mA
l
2.73
2.8
2.87
V
Line Regulation with Respect to VIN
ILDO1 = 1mA, VIN = VIN1 = 2.9V to 5.5V
1
mV/V
Load Regulation
ILDO1 = 1mA to 150mA
–0.1
mV/mA
Available Output Current
150
mA
Short-Circuit Output Current
440
mA
VDROP1
Dropout Voltage (Note 6)
ILDO1 = 150mA
135
250
mV
tSS,LDO1
Soft-Start Time
0.1
ms
RPD,LDO1
Output Pulldown Resistance in Shutdown
10
k
Ω
LDO Regulator 2
VLDO2
Regulated Output Voltage
LDO2 Output, ILDO2 = 1mA
l
1.755
1.8
1.845
V
Line Regulation with Respect to VIN
ILDO2 = 1mA, VIN = 2.9V to 5.5V
0.6
mV/V
Load Regulation
ILDO2 = 1mA to 150mA
–0.1
mV/mA
Available Output Current
150
mA
Short-Circuit Output Current
450
mA
VDROP2
Dropout Voltage (Note 6)
ILDO2 = 150mA
290
400
mV
tSS,LDO2
Soft-Start Time
0.1
ms
RPD,LDO2
Output Pulldown Resistance in Shutdown
10
k
Ω
Note 4: Dynamic supply current is higher due to the gate charge delivered
to the buck regulator’s internal MOSFET switches at the switching
frequency.
Note 5: The current limit features of this part are intended to protect the
IC from short term or intermittent fault conditions. Continuous operation
above the specied maximum specied pin current rating may result in
device degradation or failure.
Note 6: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specied output current. When LDO1 is
in dropout, its output voltage will be equal to: VIN1 – VDROP1. When LDO2
is in dropout, its output voltage will be equal to: VIN – VDROP2.
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