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LTM8020
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 10V, V SHDN = 10V, V BIAS = 3V, External C IN = 2.2μF, C OUT = 4.7μF.
(Note 2)
SYMBOL
V OUT(AC_RMS)
f SW
I SC
V ADJ
V BIAS(MIN)
PARAMETER
Output Ripple (RMS)
Switching Frequency
Output Short-Circuit Current
Voltage at ADJ Pin
Minimum BIAS Voltage for Proper
CONDITIONS
I OUT = 100mA, V OUT = 3.3V, V IN = 24V
I OUT = 200mA
V IN = 36V, V OUT = 0V
l
l
MIN
1.228
3
TYP
7.5
450
350
MAX
1.265
UNITS
mV
kHz
mA
V
V
Operation
I ADJ
I SHDN
Current Out of ADJ Pin
SHDN Pin Current
ADJ = 0V, V OUT = 5V, V SHDN = 0V
V SHDN = 2.5V
l
9.65
1
10.35
5
μA
μA
V IH( SHDN )
V IL( SHDN )
SHDN Input High Voltage
SHDN Input Low Voltage
2.5
0.2
V
V
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 LTM8020E is guaranteed to meet performance specifications
from 0°C to 85°C ambient. Specifications over the full –40°C to
85°C ambient operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8020I is guaranteed to meet specifications over the full –40°C to 85°C
ambient operating temperature range. The LTM8020MP is guaranteed
to meet specifications over the full –55°C to 125°C internal operating
temperature range. Note that the maximum internal temperature is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors.
Note 3: Guaranteed by design.
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C unless otherwise noted.
90
80
70
60
50
40
30
3.3V OUT Efficiency
1000
100
10
3.3V OUT Power Loss
90
80
70
60
50
40
30
5V OUT Efficiency
20
10
0
0.1
1
10
100
5V IN
12V IN
24V IN
36V IN
1000
1
0.1
0.1
1
10
100
5V IN
12V IN
24V IN
36V IN
1000
20
10
0
0.1
1
10
100
12V IN
24V IN
36V IN
1000
I LOAD (mA)
8020 G01
I OUT (mA)
8020 G02
I LOAD (mA)
8020 G03
8020fd
3
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