Maximum Internal Temperature (Note 3) .............. 125°C
Maximum Solder Temperature .............................. 250°C
ADJ2
BGA PACKAGE
45-LEAD (11.25mm
×
9mm
×
4.92mm)
T
JMAX
= 125°C,
θ
JA
= 23.2°C/W,
θ
JCbottom
= 5.8°C/W,
θ
JCtop
= 23.2°C/W,
θ
JB
= 6.7°C/W
WEIGHT = 1.1g,
θ
VALUES DETERMINED PER JEDEC 51-9, 51-12
orDer inForMaTion
LEAD FREE FINISH
LTM8048EY#PBF
LTM8048IY#PBF
LTM8048MPY#PBF
TRAY
LTM8048EY#PBF
LTM8048IY#PBF
LTM8048MPY#PBF
PART MARKING*
LTM8048Y
LTM8048Y
LTM8048Y
PACKAGE DESCRIPTION
45-Lead (11.25mm
×
9mm
×
4.92mm) BGA
45-Lead (11.25mm
×
9mm
×
4.92mm) BGA
45-Lead (11.25mm
×
9mm
×
4.92mm) BGA
TEMPERATURE RANGE (Note 3)
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
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/
8048f
2
LTM8048
elecTrical characTerisTics
PARAMETER
Minimum Input DC Voltage
V
OUT1
DC Voltage
V
IN
Quiescent Current
V
OUT1
Line Regulation
V
OUT1
Load Regulation
V
OUT1
Ripple (RMS)
Input Short Circuit Current
RUN Pin Input Threshold
RUN Pin Current
SS Threshold
SS Sourcing Current
BIAS Current
Minimum BIAS Voltage (Note 4)
LDO (V
OUT2
) Minimum Input DC Voltage
V
OUT2
Voltage Range
ADJ2 Pin Voltage
SS = 0V
V
IN
= 12V, BIAS = 5V, I
LOAD1
= 100mA
I
LOAD1
= 100mA
(Note 5)
V
OUT1
= 16V, R
ADJ2
Open, No Load (Note 5)
V
OUT1
= 16V, R
ADJ2
= 41.2k, No Load (Note 5)
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)
2V < V
OUT1
< 16V, I
OUT2
= 1mA (Note 5)
V
OUT1
= 5V, 10mA < I
OUT2
= 300mA (Note 5)
I
OUT2
= 10mA (Note 5)
I
OUT2
= 100mA (Note 5)
I
OUT2
= 300mA (Note 5)
C
BYP
= 0.01µF I
OUT2
= 300mA, BW = 100Hz to 100kHz (Note 5)
,
20
l
l
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).
CONDITIONS
BIAS = V
IN
R
ADJ1
= 12.4k
R
ADJ1
= 7.15k
R
ADJ1
= 3.16k
V
RUN
= 0V
Not Switching
6V ≤ V
IN
≤ 31V, I
OUT
= 0.15A
0.05A ≤ I
OUT
≤ 0.2A
I
OUT
= 0.1A
V
OUT1
Shorted
RUN Pin Rising
V
RUN
= 1V
V
RUN
= 1.3V
1.18
l
MIN
TYP
2.5
5
12
850
1.7
1.5
20
30
1.24
2.5
0.1
0.7
–10
8
MAX
3.1
UNITS
V
V
V
V
1
µA
µA
%
%
mV
mA
1.30
V
µA
µA
V
µA
mA
3.1
1.8
1.22
15.8
1.19
1.15
1.22
1.25
1.29
5
10
0.25
0.34
0.43
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
.
2.3
V
V
V
V
V
V
V
mV
mV
V
V
V
µV
RMS
V
OUT2
Line Regulation
V
OUT2
Load Regulation
LDO Dropout Voltage
1
2
V
OUT2
Ripple (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
实时操作系统RTOS
