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参数资料
型号： LT3580MPMS8E#TRPBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： 2.8 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO8
封装： LEAD FREE, PLASTIC, MSOP-8
文件页数： 22/28页
文件大小： 289K
代理商： LT3580MPMS8E#TRPBF
LT3580
3
3580fg
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 LT3580E is guaranteed to meet performance specifications
from 0°C to 125°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
LT3580I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3580H is guaranteed over the full –40°C to
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSHDN = VIN unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Voltage Range
l
2.5
32
V
Positive Feedback Voltage
l
1.195
1.215
1.230
V
Negative Feedback Voltage
l
0
5
12
mV
Positive FB Pin Bias Current
VFB = Positive Feedback Voltage, Current Into Pin
l
81
83.3
85
μA
Negative FB Pin Bias Current
VFB = Negative Feedback Voltage, Current Out of Pin
(LT3580E, LT3580I, LT3580MP)
(LT3580H)
l
81
83.3
85.5
86
μA
Error Amplifier Transconductance
230
μmhos
Error Amplifier Voltage Gain
70
V/V
Quiescent Current
VSHDN = 2.5V, Not Switching
1
1.5
mA
Quiescent Current in Shutdown
VSHDN = 0V
0
1
μA
Reference Line Regulation
2.5V ≤ VIN ≤ 32V
0.01
0.05
%/V
Switching Frequency, fOSC
RT = 45.3k (LT3580E, LT3580I, LT3580H)
RT = 45.3k (LT3580MP)
RT = 464k (LT3580E, LT3580I, LT3580H)
RT = 464k (LT3580MP)
l
1.8
180
2
200
2.2
2.25
220
225
MHz
kHz
Switching Frequency in Foldback
Compared to Normal fOSC
1/4
Ratio
Switching Frequency Set Range
SYNCing or Free Running
l
200
2500
kHz
SYNC High Level for Synchronization
l
1.3
V
SYNC Low Level for Synchronization
l
0.4
V
SYNC Clock Pulse Duty Cycle
VSYNC = 0V to 2V
35
65
%
Recommended Minimum SYNC Ratio fSYNC/fOSC
3/4
Minimum Off-Time
60
ns
Minimum On-Time
100
ns
Switch Current Limit
Minimum Duty Cycle (Note3) (LT3580E, LT3580I, LT3580H)
Minimum Duty Cycle (Note3) (LT3580MP)
Maximum Duty Cycle (Notes 3, 4) (LT3580E, LT3580I,
LT3580MP)
Maximum Duty Cycle (Notes 3, 4) (LT3580H)
l
2.2
2.15
1.6
1.55
2.5
2.2
1.9
2.8
2.6
A
Switch VCESAT
ISW = 1.5A
300
mV
Switch Leakage Current
VSW = 5V
0.01
1
μA
Soft-Start Charging Current
VSS = 0.5V
l
468
μA
SHDN Minimum Input
Voltage High
Active Mode, SHDN Rising (LT3580E, LT3580I)
Active Mode, SHDN Rising (LT3580H, LT3580MP)
Active Mode, SHDN Falling (LT3580E, LT3580I)
Active Mode, SHDN Falling (LT3580H, LT3580MP)
l
1.27
1.25
1.24
1.22
1.32
1.29
1.38
1.4
1.33
1.35
V
SHDN Input Voltage Low
Shutdown Mode
l
0.3
V
SHDN Pin Bias Current
VSHDN = 3V
VSHDN = 1.3V
VSHDN = 0V
9.7
40
11.6
0
60
13.4
0.1
μA
150°C operating junction temperature range. The LT3580MP is guaranteed
over the full –55°C to 125°C operating junction temperature range.
Operating lifetime is derated at junction temperatures greater than 125°C.
Note 3: Current limit guaranteed by design and/or correlation to static test.
Note 4: Current limit measured at equivalent switching frequency of 2.5MHz.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 150°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
相关PDF资料
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