Maximum Body Reflow Temperature .................... 240°C
Maximum Storage Temperature............................ 125°C
BGA PACKAGE
114 PADS (15mm
×
15mm
×
4.92mm)
T
JMAX
= 125°C,
θ
JA
= 17.7°C/W,
θ
JB
= 6.0°C/W,
θ
JCtop
= 15°C/W,
θ
JCbottom
= 6.0°C/W
θ
VALUES DETERMINED PER JEDEC 51-9, 51-12
WEIGHT = 1.8 GRAMS
ORDER INFORMATION
LEAD FREE FINISH
LTM8028EY#PBF
LTM8028IY#PBF
LTM8028MPY#PBF
TRAY
LTM8028EY#PBF
LTM8028IY#PBF
LTM8028MPY#PBF
PART MARKING* PACKAGE DESCRIPTION
LTM8028Y
LTM8028Y
LTM8028Y
114-Lead (15mm
×
15mm
×
4.92mm) BGA
114-Lead (15mm
×
15mm
×
4.92mm) BGA
114-Lead (15mm
×
15mm
×
4.92mm) BGA
TEMPERATURE RANGE (NOTE 2)
–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/
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Output DC Voltage
CONDITIONS
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, RUN = 3V unless otherwise noted. (Note 2)
MIN
l
l
l
l
l
TYP
0.8
1.0
1.2
1.5
1.8
1
35
MAX
6
0.812
1.015
1.218
1.523
1.827
5
UNITS
V
V
V
V
V
V
A
µA
mA
8028f
0.788
0.985
1.182
1.477
1.773
Output DC Current
Quiescent Current Into V
IN
V
OUT
= 1.8V
RUN = 0V
No load
2
For more information
www.linear.com/LTM8028
LTM8028
ELECTRICAL CHARACTERISTICS
PARAMETER
Line Regulation
Load Regulation
CONDITIONS
6V < V
IN
< 36V, I
OUT
= 10mA
0.01A < I
OUT
< 5A, V
OUT
= 0.8V, BKV = 1.05V, RUN = 0V
l
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, RUN = 3V unless otherwise noted. (Note 2)
MIN
TYP
–1.5
–2
l
MAX
1
–3
–5.5
–4
–7.5
–4
–7.5
–5
–9
–7
–13
UNITS
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
kHz
kHz
µA
0.01A < I
OUT
< 5A, V
OUT
= 1.0V, BKV = 1.25V, RUN = 0V
0.01A < I
OUT
< 5A, V
OUT
= 1.2V, BKV = 1.45V, RUN = 0V
l
–2
–2.5
l
0.01A < I
OUT
< 5A, V
OUT
= 1.5V, BKV = 1.75V, RUN = 0V
0.01A < I
OUT
< 5A, V
OUT
= 1.8V, BKV = 2.05V, RUN = 0V
l
–3
50
300
1000
200
5.5
l
Sense Pin Current
Switching Frequency
RUN Pin Current
RUN Threshold Voltage (Falling)
RUN Input Hysteresis
I
MAX
Pin Current
I
MAX
Current Limit Accuracy
SS Pin Current
SYNC Input Threshold
SYNC Bias Current
V
OB
Voltage
V
Ox
Input Low Threshold
V
Ox
Input High Threshold
V
Ox
Input Z Range
V
Ox
Input Current High
V
Ox
Input Current Low
MARGA Pin Current
PGOOD Theshold
Output Voltage Noise (Note 3)
V
OUT
= 0.8V
V
OUT
= 1.8V
R
T
= 40.2k
R
T
= 200k
RUN = 1.45V
1.49
1.55
130
125
1.61
V
mV
µA
I
MAX
= 0.75V
I
MAX
= 1.5V
I
MAX
= 0.75V
f
SYNC
= 500kHz
SYNC = 0V
5.0
2.20
6.1
3.6
11
1.2
1
3.3
A
A
µA
V
µA
V
V
V
V
µA
µA
μA
V
V
µV
RMS
0.8
V
OB
= 3.3V
V
OB
= 3.3V
V
OB
= 3.3V
l
l
l
0.25
3.05
0.75
2.4
40
40
MARGA = 0V
V
OUT(NOMINAL)
= 1.0V, V
OUT
Rising
V
OUT(NOMINAL)
= 1.0V, V
OUT
Falling
,
V
OUT
= 1.8V, C
OUT
= 137µF 5A Load, BW = 10Hz to 100kHz
3.5
0.9
0.85
40
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 LTM8028E 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 LTM8028I is guaranteed to meet specifications over the full –40°C
to 125°C internal operating temperature range. The LTM8028MP 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 3:
Guaranteed by design, characterization and correlation with
statistical process controls.
Note 4:
Unless otherwise stated, the absolute minimum voltage is zero.
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