ADJ Voltage ................................................................5V
BIAS Voltage ...............................................................7V
V
OUT
Voltage .............................................................10V
Internal Operating Temperature
Range (Note 2) ..................................–40°C to 125°C
Maximum Solder Temperature .............................. 260°C
Storage Temperature Range...................–55°C to 125°C
V
OUT
BANK 2
BIAS
LGA PACKAGE
35-LEAD (11.25mm 6.25mm
2.82mm)
T
JMAX
= 125°C,
θ
JA
= 24.9°C/W, WEIGHT = 0.49g
θ
JA
DERIVED FROM 6.35cm
×
6.35cm; 4-LAYER PCB
ORDER INFORMATION
LEAD FREE FINISH
LTM8021EV#PBF
LTM8021IV#PBF
PART MARKING*
LTM8021V
LTM8021V
PACKAGE DESCRIPTION
35-Lead (11.25mm
×
6.25mm
×
2.82mm)
35-Lead (11.25mm
×
6.25mm
×
2.82mm)
TEMPERATURE RANGE (NOTE 2)
–40°C to 125°C
–40°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
SYMBOL
V
IN
V
OUT
R
ADJ(MIN)
I
LK
I
OUT
IQV
IN
IQ
BIAS
ΔV
OUT
/V
OUT
ΔV
OUT
/V
OUT
PARAMETER
Input DC Voltage
Output DC Voltage
Minimum Allowable R
ADJ
Leakage from IN to OUT
Continuous Output DC Current
Quiescent Current into V
IN
Quiescent Current into BIAS
Line Regulation
Load Regulation
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C, V
IN
= 10V, V
RUN/SS
= 10V, V
BIAS
= 3V, R
ADJ
= 31.6k.
CONDITIONS
V
RUN/SS
= 5V, R
ADJ
= Open
0 < I
OUT
< 500mA; R
ADJ
Open
0 < I
OUT
< 500mA; R
ADJ
= 19.1k, 0.1%
Note 3
RUN/SS = V
BIAS
= 0V, R
ADJ
Open
5V ≤ V
IN
≤ 36V, V
BIAS
= V
OUT
RUN/SS = 0.2V, V
BIAS
, R
ADJ
Open
Not Switching
Not Switching
5V ≤ V
IN
≤ 36V, I
OUT
= 500mA
R
ADJ
= Open
V
IN
= 24V, 0 ≤ I
OUT
≤ 500mA, V
BIAS
= V
OUT
0
0.1
1.5
0.15
0.5
0.35
18
2.7
6
500
1
2.5
MIN
3
0.8
5
TYP
MAX
36
UNITS
V
V
V
kΩ
μA
mA
μA
mA
μA
%
%
8021fb
2
LTM8021
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUT(DC)
V
OUT(AC_RMS)
f
SW
I
OSC
I
ISC
ADJ
V
BIAS(MIN)
I
ADJ
I
RUN/SS
V
IH(RUN/SS)
V
IL(RUN/SS)
R
FB
PARAMETER
DC Output Voltage
Output Voltage Ripple (RMS)
Switching Frequency
Short-Circuit Output Current
Short-Circuit Input Current
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
Internal Feedback Resistor
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C, V
IN
= 10V, V
RUN/SS
= 10V, V
BIAS
= 3V, R
ADJ
= 31.6k.
CONDITIONS
V
IN
= 24V, 0 ≤ I
OUT
≤ 500mA
R
ADJ
= 31.6k, 0.1%
V
IN
= 24V, I
OUT
= 250mA
C
OUT
= 2.2μF V
BIAS
= V
OUT
,
I
OUT
= 500mA
V
IN
= 36V, V
BIAS
= V
OUT
= 0V
V
IN
= 36V, V
BIAS
= V
OUT
= 0V
R
ADJ
Open
I
OUT
= 500mA
V
OUT
= 5V, V
ADJ
= 0V, RUN/SS = 0V
V
RUN/SS
= 2.5V, R
ADJ
Open
R
ADJ
Open, I
OUT
= 500mA
R
ADJ
Open, I
OUT
= 500mA
RUN/SS = V
BIAS
= V
ADJ
= 0V
100
1.6
0.5
l
MIN
TYP
3.3
1
MAX
UNITS
V
mV
0.9
1.1
900
25
1.3
MHz
mA
mA
0.79
0.80
2.2
50
23
0.83
3
V
V
μA
μA
V
V
kΩ
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 LTM8021E 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, characteriza-
tion and correlation with statistical process controls. The LTM8021I is
guaranteed to meet specifications over the full –40°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
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