LTM8028
3
8028fb
For more information www.linear.com/LTM8028
elecTrical characTerisTics
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
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)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Quiescent Current Into V
IN
RUN = 0V
No load
1
35
µA
mA
Line Regulation 6V < V
IN
< 36V, I
OUT
= 10mA
l
1 mV
Load Regulation 0.01A < I
OUT
< 5A, V
OUT
= 0.8V, BKV = 1.05V, RUN = 0V
l
–1.5 –3
–5.5
mV
mV
0.01A < I
OUT
< 5A, V
OUT
= 1.0V, BKV = 1.25V, RUN = 0V
l
–2 –4
–7.5
mV
mV
0.01A < I
OUT
< 5A, V
OUT
= 1.2V, BKV = 1.45V, RUN = 0V
l
–2 –4
–7.5
mV
mV
0.01A < I
OUT
< 5A, V
OUT
= 1.5V, BKV = 1.75V, RUN = 0V
l
–2.5 –5
–9
mV
mV
0.01A < I
OUT
< 5A, V
OUT
= 1.8V, BKV = 2.05V, RUN = 0V
l
–3 –7
–13
mV
mV
Sense Pin Current V
OUT
= 0.8V
V
OUT
= 1.8V
50
300
µA
µA
Switching Frequency R
T
= 40.2k
R
T
= 200k
1000
200
kHz
kHz
RUN Pin Current RUN = 1.45V 5.5 µA
RUN Threshold Voltage (Falling)
l
1.49 1.55 1.61 V
RUN Input Hysteresis 130 mV
I
MAX
Pin Current I
MAX
= 0.75V 125 µA
I
MAX
Current Limit Accuracy I
MAX
= 1.5V
I
MAX
= 0.75V
5.0
2.20
6.1
3.6
A
A
SS Pin Current 11 µA
SYNC Input Threshold f
SYNC
= 500kHz 0.6 1.3 V
SYNC Bias Current SYNC = 0V 1 µA
V
OB
Voltage 3.3 V
V
Ox
Input Low Threshold V
OB
= 3.3V
l
0.25 V
V
Ox
Input High Threshold V
OB
= 3.3V
l
3.05 V
V
Ox
Input Z Range V
OB
= 3.3V
l
0.75 2.4 V
V
Ox
Input Current High 40 µA
V
Ox
Input Current Low 40 µA
MARGA Pin Current MARGA = 0V 3.5 μA
PGOOD Threshold V
OUT(NOMINAL)
= 1.0V, V
OUT
Rising
V
OUT(NOMINAL)
= 1.0V, V
OUT
Falling
0.9
0.85
V
V
Output Voltage Noise (Note 3) V
OUT
= 1.8V, C
OUT
= 137µF, 5A Load, BW = 10Hz to 100kHz 40 µV
RMS
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.
