Datasheet

LTM8020
3
8020fd
I
LOAD
(mA)
EFFICIENCY (%)
90
80
70
60
50
40
30
20
10
0
0.1 10 100 1000
8020 G03
1
12V
IN
24V
IN
36V
IN
I
LOAD
(mA)
EFFICIENCY (%)
90
80
70
60
50
40
30
20
10
0
0.1 10 100 1000
8020 G01
1
5V
IN
12V
IN
24V
IN
36V
IN
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 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
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 PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OUT(AC_RMS)
Output Ripple (RMS) I
OUT
= 100mA, V
OUT
= 3.3V, V
IN
= 24V 7.5 mV
f
SW
Switching Frequency I
OUT
= 200mA 450 kHz
I
SC
Output Short-Circuit Current V
IN
= 36V, V
OUT
= 0V 350 mA
V
ADJ
Voltage at ADJ Pin
l
1.228 1.265 V
V
BIAS(MIN)
Minimum BIAS Voltage for Proper
Operation
l
3V
I
ADJ
Current Out of ADJ Pin ADJ = 0V, V
OUT
= 5V, V
SHDN
= 0V
l
9.65 10.35 μA
I
SHDN
SHDN Pin Current V
SHDN
= 2.5V 1 5 μA
V
IH(SHDN)
SHDN Input High Voltage 2.5 V
V
IL(SHDN)
SHDN Input Low Voltage 0.2 V
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
3.3V
OUT
Efficiency 3.3V
OUT
Power Loss 5V
OUT
Efficiency
I
OUT
(mA)
POWER LOSS (mW)
1000
100
10
1
0.1
0.1 10 100 1000
8020 G02
1
5V
IN
12V
IN
24V
IN
36V
IN
T
A
= 25°C unless otherwise noted.