LTM4641
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
V
OUT
V
OUT(DC)
Input Specifications
V
RUN(ON,OFF)
I
RUN(ON)
I
RUN(OFF)
V
INL(UVLO)
I
INRUSH(VINH)
I
Q(VINH)
RUN On/Off Threshold
RUN Pull-Up Current
RUN Pull-Down Current, Switching
Inhibited
V
INL
Undervoltage Lockout
Input Inrush Current Through V
INH
,
at Start-Up
Power Stage Bias Current (I
VINH
) at
No Load
Run Rising, Turn On
Run Falling, Turn Off
V
RUN
= 0V
V
RUN
= 3.3V
V
RUN
= 3.3V, UVLO = 0V (M
HYST
On)
V
INL
Rising
V
INL
Falling
Hysteresis
C
SS
= Open
I
OUT
= 0A and:
FCB ≥ 0.84V (Pulse-Skipping Mode)
FCB ≤ 0.76V (Forced Continuous Mode)
Shutdown, RUN = 0
INTV
CC
Connected to DRV
CC
and:
V
IN
= 28V, I
OUT
= 0A
V
IN
= 28V, I
OUT
= 10A
V
IN
= 28V, Shutdown, RUN = 0
I
OUT
= 10A and:
V
IN
= 4.5V
V
IN
= 28V
V
IN
= 38V
(Note 3)
V
IN
from 4.5V to 38V, I
OUT
= 0A
I
OUT
from 0A to 10A (Note 3)
I
OUT
= 0A
I
OUT
= 0A
I
OUT
= 10A
I
OUT
= 0A
RUN Electrically Open Circuit, Time Between
Application of V
IN
to V
OUT
Becoming Regulated,
OV
PGM
= 1.5V, C
TMR
= C
SS
= Open
V
IN
Established, (TMR-Set POR Time Expired)
Time Between RUN Releasing from GND to
PGOOD Going Logic High, C
SS
= Open,
OV
PGM
= 1.5V
I
OUT
from 0A to 5A at 5A/µs
I
OUT
from 5A to 0A at 5A/µs
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= V
INH
= V
INL
= 28V, per the typical application
shown in Figure 45, unless otherwise noted.
PARAMETER
Input DC Voltage
Output Voltage Range
Output Voltage, Total Variation with
Line and Load, and Prior to UVLO
Use R
SET1A
= R
SET1B
≤ 8.2kΩ. R
fSET
Values
Recommended in Table 1
4.5V ≤ V
IN
≤ 38V, 0A ≤ I
OUT
≤ 10A
V
IN
= 4V (Ramped Down from 4.5V), I
OUT
= 0A
CONDITIONS
l
l
l
l
MIN
4.5
0.6
1.773
1.773
TYP
MAX
38
6
UNITS
V
V
V
V
V
V
µA
µA
nA
1.800
1.800
1.25
1.15
–520
–165
1
4.2
3.8
400
230
1.827
1.827
2
–460
–110
0.8
–580
–220
3.5
300
4.5
4
V
V
mV
mA
8
29
0.2
14.5
15.5
5
4.65
790
590
0
0.02
0.04
16
290
330
10
3
10
0.15
0.15
mA
mA
mA
mA
mA
mA
A
mA
mA
A
%
%
mV
P-P
kHz
kHz
mV
ms
I
Q(VINL)
Control Bias Current (I
VINL
)
I
S(VINH)
Power Stage Input Current (I
VINH
) at
Full Load
Output Specifications
I
OUT(DC)
∆V
OUT(LINE)
/V
OUT
∆V
OUT(LOAD)
/V
OUT
V
OUT(AC)
f
S
V
OUT(START)
t
START
t
RUN(ON-DELAY)
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Output Voltage Ripple Amplitude
Output Voltage Ripple Frequency
Turn-On Overshoot
V
IN
-to-V
OUT
Start-Up Time
RUN-to-V
OUT
Turn-On Response
Time
175
400
μs
∆V
OUT(LS)
t
SETTLE(LS)
Peak Deviation for Dynamic Load
Step
40
40
20
20
mV
mV
μs
µs
4641f
Settling Time for Dynamic Load Step I
OUT
from 0A to 5A at 5A/µs
I
OUT
from 5A to 0A at 5A/µs
4
LINER [ LINEAR TECHNOLOGY ]
