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參數(shù)資料
| 型號： | LTC3642IMS8E-3.3E#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.13 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 306K |
| 代理商： | LTC3642IMS8E-3.3E#PBF |
LTC3642
3
3642fa
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
junction temperature range, otherwise specications are at TA = 25°C. VIN = 10V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply (VIN)
VIN
Input Voltage Operating Range
4.5
45
V
UVLO
VIN Undervoltage Lockout
VIN Rising
VIN Falling
Hysteresis
l
3.80
3.75
4.15
4.00
150
4.50
4.35
V
mV
OVLO
VIN Overvoltage Lockout
VIN Rising
VIN Falling
Hysteresis
47
45
50
48
2
52
50
V
IQ
DC Supply Current (Note 3)
Active Mode
Sleep Mode
Shutdown Mode
VRUN = 0V
125
12
3
220
22
6
μA
Output Supply (VOUT/VFB)
VOUT
Output Voltage Trip Thresholds
LTC3642-3.3V, VOUT Rising
LTC3642-3.3V, VOUT Falling
l
3.260
3.240
3.310
3.290
3.360
3.340
V
LTC3642-5V, VOUT Rising
LTC3642-5V, VOUT Falling
l
4.940
4.910
5.015
4.985
5.090
5.060
V
VFB
Feedback Comparator Trip Voltage
VFB Rising
l
0.792
0.800
0.808
V
VHYST
Feedback Comparator Hysteresis
l
357
mV
IFB
Feedback Pin Current
Adjustable Output Version, VFB = 1V
–10
0
10
nA
ΔVLINEREG
Feedback Voltage Line Regulation
VIN = 4.5V to 45V
LTC3642-5, VIN = 6V to 45V
0.001
%/V
Operation
VRUN
Run Pin Threshold
RUN Rising
RUN Falling
Hysteresis
1.17
1.06
1.21
1.10
110
1.25
1.14
V
mV
IRUN
Run Pin Leakage Current
RUN = 1.3V
–10
0
10
nA
VHYSTL
Hysteresis Pin Voltage Low
RUN < 1V, IHYST = 1mA
0.07
0.1
V
IHYST
Hysteresis Pin Leakage Current
VHYST = 1.3V
–10
0
10
nA
ISS
Soft-Start Pin Pull-Up Current
VSS < 1.5V
4.5
5.5
6.5
μA
tINTSS
Internal Soft-Start Time
SS Pin Floating
0.75
ms
IPEAK
Peak Current Trip Threshold
ISET Floating
500k Resistor from ISET to GND
ISET Shorted to GND
l
100
20
115
55
25
130
32
mA
RON
Power Switch On-Resistance
Top Switch
Bottom Switch
ISW = –25mA
ISW = 25mA
3.0
1.5
Ω
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 LTC3642E is guaranteed to meet specications from 0°C
to 85°C with specications over the –40°C to 125°C operating junction
temperature range assured by design, characterization and correlation
with statistical process controls. The LTC3642I is guaranteed to meet
specications from –40°C to 125°C.
TJ is calculated from the ambient temperature TA and power dissipation PD
according to the following formula:
TJ = TA + (PD θJA°C/W)
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
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