Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to:
http://www.linear.com/packaging/
8029f
2
LTM8029
elecTrical characTerisTics
PARAMETER
Minimum Input Voltage
Output DC Voltage
Output DC Current
Quiescent Current Into V
IN
BIAS Current
Line Regulation
Load Regulation
Output RMS Voltage Ripple
Switching Frequency
I
OUT
≤ 0.6A, R
FB
Open
I
OUT
≤ 0.6A, R
FB
= 576k
3.3V
OUT
RUN = 0V
No Load
No Load
600mA Load
V
IN
= 32V, V
OUT
= 20V at 100mA Load
5.5V < V
IN
< 36V, I
OUT
= 600mA
10mA < I
OUT
< 600mA
I
OUT
= 600mA
R
T
= 41.2k
R
T
= 124k
R
T
= 768k
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, RUN = 12V unless otherwise noted (Note 2).
CONDITIONS
l
MIN
TYP
1.2
3.3
MAX
4.5
UNITS
V
V
V
10
0.9
5
l
600
mA
µA
µA
µA
mA
mA
%
%
mV
MHz
MHz
kHz
9
3.6
4.7
0.3
0.4
10
2.2
1
200
1.185
1.175
1.20
1.20
1
l
Voltage at FB Pin
Internal Feedback Resistor
Minimum BIAS Voltage for Proper Operation
RUN Pin Current
RUN Threshold Voltage
RUN Voltage Hysteresis
PGOOD Threshold (at FB)
PGOOD Leakage Current
PGOOD Sink Current
V
OUT
Rising
PGOOD = 6V
PGOOD = 0.4V
RUN = 2.5V
l
1.215
1.225
2.25
30
1.3
V
V
MΩ
V
nA
V
mV
V
1.7
1
0.95
30
1.1
0.1
100
1
µA
µA
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 LTM8029E is guaranteed to meet performance specifications
from 0°C to 125°C internal. Specifications over the full –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls.
The LTM8029I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8029MP 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.
8029f
3
LTM8029
T
A
= 25°C, unless otherwise noted. Configured per Table 1, where applicable.
2.5V
OUT
Efficiency vs Output
Current, BIAS = 5V
90
85
80
EFFICIENCY (%)
EFFICIENCY (%)
75
70
65
60
55
50
0
100
200
300
400
5V
IN
12V
IN
24V
IN
36V
IN
500
600
8029 G01
Typical perForMance characTerisTics
3.3V
OUT
Efficiency vs Output
Current, BIAS = 5V
90
85
80
75
70
65
60
55
50
0
100
200
300
400
5V
IN
12V
IN
24V
IN
36V
IN
500
600
8029 G02
5V
OUT
Efficiency vs Output
Current, BIAS = 5V
90
85
EFFICIENCY (%)
80
75
70
65
60
12V
IN
24V
IN
36V
IN
0
100
200
300
400
500
600
8029 G03
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
8V
OUT
Efficiency vs Output
Current, BIAS = 5V
95
100
95
EFFICIENCY (%)
12V
OUT
Efficiency vs Output
Current, BIAS = 5V
100
98
96
EFFICIENCY (%)
94
92
90
88
86
84
24V
IN
36V
IN
0
100
200
300
400
500
600
8029 G05
18V
OUT
Efficiency vs Output
Current, BIAS = 5V
90
EFFICIENCY (%)
90
85
80
75
70
85
80
75
70
12V
IN
24V
IN
36V
IN
0
100
200
300
400
500
600
8029 G04
82
80
0
100
200
300
400
24V
IN
36V
IN
500
600
8029 G06
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
450
400
350
INPUT CURRENT (mA)
300
250
200
150
100
50
0
Input Current vs Output Current,
2.5V
OUT
, BIAS = 5V
5V
IN
12V
IN
24V
IN
36V
IN
600
500
INPUT CURRENT (mA)
400
300
200
100
0
Input Current vs Output Current,
3.3V
OUT
, BIAS = 5V
5V
IN
12V
IN
24V
IN
36V
IN
350
300
INPUT CURRENT (mA)
250
200
150
100
50
Input Current vs Output Current,
5V
OUT
, BIAS = 5V
12V
IN
24V
IN
36V
IN
0
100
200
300
400
500
600
8029 G07
0
100
200
300
400
500
600
8029 G08
0
0
100
200
300
400
500
600
8029 G09
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
8029f
4
LTM8029
T
A
= 25°C, unless otherwise noted. Configured per Table 1, where applicable.
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