LTM4628
elecTrical characTerisTics ꢁhe l denotes the specifications which apply over the full internal
operating temperature range (Note 2). Specified as each individual output channel. ꢁA = 25°C, VIN = 12V and VRUN1, VRUN2 at 5V
unless otherwise noted, per the typical application in Figure 28.
SYMBOL
PARAMEꢁER
CONDIꢁIONS
MIN
4.5
ꢁYP
MAX UNIꢁS
l
l
V
V
Input DC Voltage
Output Voltage
26.5
5.5
V
V
IN
0.6
OUT
V
V
,
Output Voltage, Total Variation with
Line and Load
C
= 22µF × 3, C
= 100µF × 1
OUT1(DC)
OUT2(DC)
IN
OUT
Ceramic, 470µF POSCAP, MODE_PLLIN =
GND, RFB1, RFB2 = 40.2k, V = 4.5V to 26.5V,
l
1.477
1.1
1.5
1.523
1.40
V
IN
I
= 0A to 8A
OUT
Input Specifications
V
V
, V
RUN Pin On/Off Threshold
RUN Pin On Hysteresis
RUN Rising
1.25
150
1
V
mV
A
RUN1 RUN2
, V
RUN1HYS RUN2HYS
I
Input Inrush Current at Start-Up
I
= 0A, C = 22µF × 3,
INRUSH(VIN)
OUT
IN
C
V
= 100µF , 470µF POSCAP V
= 1.5V,
OUT
OUT2
OUT1
= 1.5V, V = 12V, TRACK = 0.01µF
IN
I
Input Supply Bias Current
Input Supply Current
V
V
V
= 12V, V
= 1.5V, Burst Mode Operation
= 1.5V, Pulse-Skipping Mode
5
mA
mA
mA
µA
Q(VIN)
IN
IN
IN
OUT
OUT
= 12V, V
15
65
60
= 12V, V = 1.5V, Switching Continuous
OUT
Shutdown, RUN = 0, V = 12V
IN
I
V
IN
V
IN
V
IN
= 4.75V, V
= 1.5V, I
= 8A
2.9
1.18
0.575
A
A
A
S(VIN)
OUT
OUT
= 12V, V
= 1.5V, I
= 8A
OUT
OUT
= 26.5V, V
= 1.5V, I
= 8A
OUT
OUT
Output Specifications
, I
I
Output Continuous
Current Range
V
V
= 12V, V = 1.5V (Note 7)
OUT
0
8
A
%/V
%
OUT1(DC) OUT2(DC)
IN
l
l
ΔV
ΔV
/V
Line Regulation Accuracy
Load Regulation Accuracy
Output Ripple Voltage
= 1.5V, V from 4.5V to 26.5V
0.010
0.15
15
0.04
0.3
OUT1(LINE) OUT1
OUT
IN
/V
I
= 0A for Each Output,
OUT
OUT2(LINE) OUT2
ΔV
ΔV
/V
For Each Output, V
= 1.5V, 0A to 8A
OUT1(LOAD) OUT1
OUT
/V
V
= 12V (Note 7)
OUT2(LOAD) OUT2
IN
V
, V
I
= 0A, C
= 100µF X5R Ceramic,
mV
P-P
OUT1(AC) OUT2(AC)
OUT
OUT
470µF POSCAP
V
IN
= 12V, V
= 1.5V
OUT
f (Each Channel)
Output Ripple Voltage Frequency
SYNC Capture Range
V
IN
= 12V, V
= 1.5V, f = 2.5V (Note 4)
780
kHz
kHz
S
OUT
SET
f
400
780
SYNC
(Each Channel)
ΔV
Turn-On Overshoot
Turn-On Time
C
V
= 100µF X5R Ceramic, 470µF POSCAP,
10
5
mV
ms
OUTSTART
OUT
OUT
(Each Channel)
= 1.5V, I
= 0A V = 12V
OUT IN
t
C
= 100µF X5R Ceramic, 470µF POSCAP,
OUT
START
(Each Channel)
No Load, TRACK/SS with 0.01µF to GND,
V
= 12V
IN
ΔV
Peak Deviation for Dynamic Load
Load: 0% to 50% to 0% of Full Load
30
mV
OUT(LS)
(Each Channel)
C
= 22µF × 3 X5R Ceramic, 470µF POSCAP
OUT
V
= 12V, V
= 1.5V
IN
OUT
t
Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load,
20
15
µs
A
SETTLE
(Each Channel)
V
= 12V, C
= 100µF, C
= 470µF
OUT
IN
OUT
I
Output Current Limit
V
IN
= 12V, V
= 1.5V
OUT(PK)
OUT
(Each Channel)
Control Section
l
l
V
, V
Voltage at V Pins
I
= 0A, V
= 1.5V
0.592
0.64
0.600 0.606
V
FB1 FB2
FB
OUT
OUT
I
, I
Leakage Current of V , V
(Note 6)
–5
–20
nA
FB1 FB2
FB1 FB2
V
Feedback Overvoltage Lockout
0.66
0.68
V
OVL
4628fd
3
LINEAR_DIMENSIONS [ Linear Dimensions ]
