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LTM8025
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 = 12V, RUN/SS = 12V, BIAS = 3V unles s otherwis e noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
Output DC Voltage
0 < I OUT ≤ 3A; R ADJ Open
0 < I OUT ≤ 3A; R ADJ = 16.9k; V IN = 32V
l
0.8
24
3.6
V
V
V
Output DC Current
Quiescent Current into V IN
Quiescent Current into BIAS
Line Regulation
Load Regulation
Output Voltage Ripple (RMS)
Switching Frequency
V OUT = 3.3V
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
RUN/SS = 0V
Not Switching
BIAS = 0V, Not Switching
5.5V < V IN < 36V, I OUT = 1A
0A < I OUT < 3A
0A < I OUT < 3A
R T = 45.3k
0
0.01
25
85
0.01
65
0
0.3
0.4
10
775
3
1
60
150
0.5
120
5
A
μA
μA
μA
μA
μA
μA
%
%
mV
kHz
Voltage (at ADJ Pin)
Current Out of ADJ Pin
Minimum BIAS Voltage for Proper Operation
RUN/SS Pin Current
ADJ = 1V, V OUT = 0V
RUN/SS = 2.5V
l
775
770
790
2
2
5
805
810
2.8
10
mV
mV
μA
V
μA
RUN Input High Voltage
RUN Input Low Voltage
2.5
0.2
V
V
PGOOD Threshold (at ADJ Pin)
V OUT Rising
710
mV
PGOOD Leakage Current
PGOOD = 30V
0.1
1
μA
PGOOD Sink Current
PGOOD = 0.4V
200
700
μA
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Bias Current
f SYNC = 550kHz
f SYNC = 550kHz
SYNC = 0V
0.7
0.1
0.5
V
V
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 LTM8025E 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
LTM8025I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8025MP 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.
8025fc
For more information www.linear.com/LTM8025
3
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