Maximum Junction Temperature (Note 2)............. 125°C
Solder Temperature (Note 3)................................. 245°C
orDer inForMaTion
LEAD FREE FINISH
LTM8031EV#PBF
LTM8031IV#PBF
LTM8031MPV#PBF
TRAY
LTM8031EV#PBF
LTM8031IV#PBF
LTM8031MPV#PBF
PART MARKING*
LTM8031V
LTM8031V
LTM8031V
PACKAGE DESCRIPTION
71-Lead (9mm
×
15mm
×
2.82mm) LGA
71-Lead (9mm
×
15mm
×
2.82mm) LGA
71-Lead (9mm
×
15mm
×
2.82mm) LGA
TEMPERATURE RANGE
–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/
8031fb
2
LTM8031
elecTrical characTerisTics
SYMBOL
V
IN
V
OUT
I
OUT
I
Q(VIN)
I
Q(BIAS)
∆V
OUT
V
OUT
f
SW
V
ADJ
V
BIAS(MIN)
I
ADJ
I
RUN/SS
V
IH(RUN/SS)
V
IL(RUN/SS)
V
PG(TH)
I
PGO
I
PGSINK
V
SYNCIL
V
SYNCIH
I
SYNC(BIAS)
V
IN(RIPPLE)
PARAMETER
Input DC Voltage
Output DC Voltage
Continuous Output DC Current
V
IN
Quiescent Current
BIAS Quiescent Current
0.2A < I
OUT
≤ 1A, R
ADJ
Open
0.2A < I
OUT
≤ 1A, R
ADJ
= 21.6k
V
IN
= 24V
V
RUN/SS
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
V
RUN/SS
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
10V ≤ V
IN
≤ 36V, I
OUT
= 1A, V
OUT
= 3.3V
V
IN
= 24V, 0.2A ≤ I
OUT
≤ 1A, V
OUT
= 3.3V
V
IN
= 24V, I
OUT
= 1A, V
OUT
= 3.3V
R
T
= 113k
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, V
BIAS
= 3V, unless otherwise specified.
CONDITIONS
l
MIN
3.6
TYP
0.8
10
MAX
36
UNITS
V
V
V
1
0.6
25
88
0.03
60
1
0.1
0.3
6
325
765
790
1.9
4
5
2.5
0.2
730
10
815
2.8
60
120
120
5
A
µA
µA
µA
µA
µA
µA
%
%
mV
kHz
mV
V
µA
µA
V
V
mV
µA
µA
V
V
µA
dBµV
dBµV
dBµV
l
Line Regulation
Load Regulation
Switching Frequency
Voltage at ADJ Pin
Minimum BIAS Voltage for Proper Operation
Current Out of ADJ Pin
RUN/SS Pin Current
RUN/SS Input High Voltage
RUN/SS Input Low Voltage
ADJ Voltage Threshold for PGOOD to Switch
PGOOD Leakage
PGOOD Sink Current
SYNC Input Low Threshold
SYNC Input High Threshold
SYNC Pin Bias Current
550kHz Narrowband Conducted Emission
1MHz Narrowband Conducted Emission
3MHz Narrowband Conducted Emission
V
OUT(AC_RMS)
Output Ripple (RMS)
V
RUN/SS
= 0V, V
ADJ
= 0V, V
OUT
= 1V
V
RUN/SS
= 2.5V
V
PG
= 30V
V
PG
= 0.4V
f
SYNC
= 550kHz
f
SYNC
= 550kHz
V
SYNC
= 0V, V
BIAS
= 0V
V
IN
= 24V, V
OUT
= 3.3V, I
OUT
= 1A, f
SW
= 550kHz,
5µH LISN
0.7
200
0.1
800
1
0.5
0.1
83
63
51
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 LTM8031E is guaranteed to meet performance specifications
from 0°C to 125°C internal. Specifications over the –40°C to 125°C
internal temperature range are assured by design, characterization and
correlation with statistical process controls. The LTM8031I is guaranteed
to meet specifications over the full –40°C to 125°C internal operating
temperature range. The LTM8031MP 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
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