lt3580ems8e-trpbf Linear Technology Corporation, lt3580ems8e-trpbf Datasheet - Page 3

• Manufacturer Part Number: lt3580ems8e-trpbf
• Description: Boost/inverting Dc/dc Converter With 2a Switch, Soft-start, And Synchronization
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Voltage Range
Positive Feedback Voltage
Negative Feedback Voltage
Positive FB Pin Bias Current
Negative FB Pin Bias Current
Error Amplifi er Transconductance
Error Amplifi er Voltage Gain
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency, f
Switching Frequency in Foldback
Switching Frequency Set Range
SYNC High Level for Synchronization
SYNC Low Level for Synchronization
SYNC Clock Pulse Duty Cycle
Recommended Minimum SYNC Ratio f
Minimum Off-Time
Minimum On-Time
Switch Current Limit
Switch V
Switch Leakage Current
Soft-Start Charging Current
SHDN Minimum Input
Voltage High
SHDN Input Voltage Low
SHDN Pin Bias Current
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 specifi cations
from 0°C to 125°C junction temperature. Specifi cations 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.
temperature range, otherwise specifi cations are at T
CESAT
OSC
SYNC
/f
OSC
CONDITIONS
V
V
V
V
2.5V ≤ V
R
R
Compared to Normal f
SYNCing or Free Running
V
Minimum Duty Cycle (Note 3)
Maximum Duty Cycle (Notes 3, 4)
I
V
V
Active Mode, SHDN Rising
Active Mode, SHDN Falling
Shutdown Mode
V
V
V
SW
FB
FB
SHDN
SHDN
T
T
SYNC
SW
SS
SHDN
SHDN
SHDN
= 45.3k
= 464k
= Positive Feedback Voltage, Current Into Pin
= Negative Feedback Voltage, Current Out of Pin
= 1.5A
= 0.5V
= 5V
= 0V to 2V
= 2.5V, Not Switching
= 0V
= 3V
= 1.3V
= 0V
A
IN
= 25°C. V
≤ 32V
The
l
IN
denotes the specifi cations which apply over the full operating
OSC
= 5V, V
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 125°C when overtemperature protection is active.
Continuous operation above the specifi ed maximum operating junction
temperature may impair device reliability.
SHDN
= V
IN
unless otherwise noted. (Note 2)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
1.195
MIN
1.27
1.24
180
200
2.5
1.8
1.3
2.2
1.6
9.7
81
81
35
0
4
1.215
83.3
83.3
0.01
0.01
1.32
1.29
11.6
TYP
230
200
100
300
1/4
3/4
2.5
1.9
70
60
40
5
1
0
2
6
0
LT3580
1.230
2500
MAX
85.5
0.05
1.38
1.33
13.4
220
1.5
2.2
0.4
2.8
2.6
0.3
0.1
32
12
85
65
60
1
1
8
μmhos
UNITS
3580fa
Ratio
3
MHz
%/V
kHz
kHz
V/V
mV
mA
mV
μA
μA
μA
nS
nS
μA
μA
μA
μA
μA
%
V
V
V
V
A
A
V
V
V