LTM8045
3
8045fc
For more information www.linear.com/LTM8045
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 LTM8045E is guaranteed to meet performance specifications
from 0°C to 125°C. Specifications over the –40°C to 125°C internal
temperature range are assured by design, characterization and correlation
with statistical process controls. LTM8045I is guaranteed to meet
specifications over the full –40°C to 125°C internal operating temperature
range. The LTM8045MP is guaranteed to meet specifications over the
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. RUN = 12V unless otherwise specified. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input DC Voltage
l
2.8 18 V
Positive Output DC Voltage I
OUT
= 0.7A, R
FB
= 15.4kΩ, V
OUT
–
Grounded
I
OUT
= 0.375A, R
FB
=165kΩ, V
OUT
–
Grounded
2.5
15
V
V
Negative Output DC Voltage I
OUT
= 0.7A, R
FB
= 30.0kΩ, V
OUT
+
Grounded
I
OUT
= 0.375A, R
FB
=178kΩ, V
OUT
+
Grounded
–2.5
–15
V
V
Continuous Output DC Current V
IN
= 12V, V
OUT
= 2.5V or –2.5V
V
IN
= 12V, V
OUT
= 15V or –15V
0.7
0.375
A
A
V
IN
Quiescent Current V
RUN
= 0V
Not Switching
0
10
1 µA
mA
Line Regulation 4V ≤ V
IN
≤ 18V, I
OUT
= 0.2A 0.6 %
Load Regulation 0.01A ≤ I
OUT
≤ 0.58A 0.2 %
Output RMS Voltage Ripple V
IN
= 12V, V
OUT
= 5V, I
OUT
= 580mA, 100kHz to 4MHz 4 mV
Input Short-Circuit Current V
OUT
+
= V
OUT
–
= 0V, V
IN
= 12V 200 mA
Switching Frequency R
T
= 45.3k
R
T
= 464k
l
l
1800
180
2000
200
2200
220
kHz
kHz
Voltage at FB Pin (Positive Output)
V
oltage at FB Pin (Negative Output)
l
l
1.195
0
1.215
5
1.235
12
V
mV
Current into FB Pin (Positive Output)
Current into FB Pin (Negative Output)
l
l
81
81
83.3
83.3
86
86.5
µA
µA
RUN Pin Threshold V
oltage RUN Pin Rising
RUN Pin Falling
1.235
1.32
1.29
1.385 V
V
RUN Pin Current V
RUN
= 3V
V
RUN
= 1.3V
V
RUN
= 0V
9.7
40
11.6
0
60
13.4
0.1
µA
µA
µA
SS Sourcing Current SS = 0V 5 8 13 µA
Synchronization Frequency Range 200 2000 kHz
Synchronization Duty Cycle 35 65 %
SYNC Input Low Threshold 0.4 V
SYNC Input High Threshold 1.3 V
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: This μModule converter includes overtemperature protection that
is intended to protect the device during momentary overload conditions.
Internal temperature will exceed 125°C when overtemperature protection
is active. Continuous operation above the specified maximum internal
operating junction temperature may impair device reliability.
