LTM8048 Datasheet, PDF (3/20 Pages) Linear Technology – 3.1VIN to 32VIN Isolated μModule DC/DC Converter

LTM8048
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C, RUN = 12V (Note 3).
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Input DC Voltage
V_OUT1 DC Voltage
V_IN Quiescent Current
BIAS = V_IN
R_ADJ1 = 12.4k
R_ADJ1 = 7.15k
R_ADJ1 = 3.16k
V_RUN = 0V
Not Switching
l
3.1
V
2.5
V
5
V
12
V
1
μA
850
μA
V_OUT1 Line Regulation
V_OUT1 Load Regulation
V_OUT1 Ripple (RMS)
Input Short Circuit Current
RUN Pin Input Threshold
6V ≤ V_IN ≤ 31V, I_OUT = 0.15A
0.05A ≤ I_OUT ≤ 0.2A
I_OUT = 0.1A
V_OUT1 Shorted
RUN Pin Rising
1.7
%
1.5
%
20
mV
30
mA
1.18 1.24 1.30
V
RUN Pin Current
SS Threshold
V_RUN = 1V
V_RUN = 1.3V
2.5
μA
0.1
μA
0.7
V
SS Sourcing Current
SS = 0V
–10
μA
BIAS Current
V_IN = 12V, BIAS = 5V, I_LOAD1 = 100mA
8
mA
Minimum BIAS Voltage (Note 4)
I_LOAD1 = 100mA
3.1
V
LDO (V_OUT2) Minimum Input DC Voltage (Note 5)
1.8
2.3
V
V_OUT2 Voltage Range
V_OUT1 = 16V, R_ADJ2 Open, No Load (Note 5)
V_OUT1 = 16V, R_ADJ2 = 41.2k, No Load (Note 5)
1.22
V
15.8
V
ADJ2 Pin Voltage
V_OUT1 = 2V, I_OUT2 = 1mA (Note 5)
V_OUT1 = 2V, I_OUT2 = 1mA, E- and I-Grades (Note 5)
V_OUT1 = 2V, I_OUT2 = 1mA, MP-Grade (Note 5)
1.22
V
l 1.19
1.25
V
l 1.15
1.29
V
V_OUT2 Line Regulation
2V < V_OUT1 < 16V, I_OUT2 = 1mA (Note 5)
1
5
mV
V_OUT2 Load Regulation
V_OUT1 = 5V, 10mA < I_OUT2 = 300mA (Note 5)
2
10
mV
LDO Dropout Voltage
I_OUT2 = 10mA (Note 5)
I_OUT2 = 100mA (Note 5)
I_OUT2 = 300mA (Note 5)
0.25
V
0.34
V
0.43
V
V_OUT2 Ripple (RMS)
C_BYP = 0.01μF, I_OUT2 = 300mA, BW = 100Hz to 100kHz (Note 5)
20
μV_RMS
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 LTM8048 isolation is tested at 725VDC for one second in each
polarity.
Note 3: The LTM8048E 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. LTM8048I is guaranteed to meet
specifications over the full –40°C to 125°C internal operating temperature
range. The LTM8048MP 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 4: This is the BIAS pin voltage at which the internal circuitry is
powered through the BIAS pin and not the integrated regulator. See BIAS
Pin Considerations for details.
Note 5: V_RUN = 0V (Flyback not running), but the V_OUT2 post regulator is
powered by applying a voltage to V_OUT1.
8048fa
3