Datasheet

LTM4620A
3
4620afb
For more information www.linear.com/LTM4620A
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified internal
operating temperature range. Specified as each individual output channel. T
A
= 25°C (Note 2), V
IN
= 12V and V
RUN1
, V
RUN2
at 5V
unless otherwise noted. Per the typical application in Figure 26.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input DC Voltage
l
4.5 16 V
V
OUT
Output Voltage (Note 8)
l
0.6 5.3 V
V
OUT1(DC)
,
V
OUT2(DC)
Output Voltage, Total Variation with
Line and Load
C
IN
= 22µF × 3, C
OUT
= 100µF × 1 Ceramic,
220µF POSCAP
l
1.477 1.5 1.523 V
Input Specifications
V
RUN1
, V
RUN2
RUN Pin On/Off Threshold RUN Rising 1.1 1.25 1.40 V
V
RUN1HYS
, V
RUN2HYS
RUN Pin On Hysteresis 150 mV
I
INRUSH(VIN)
Input Inrush Current at Start-Up I
OUT
= 0A, C
IN
= 22µF ×3, C
SS
= 0.01µF,
C
OUT
= 100µF ×3, V
OUT1
= 1.5V, V
OUT2
= 1.5V,
V
IN
= 12V
1 A
I
Q(VIN)
Input Supply Bias Current V
IN
= 12V, V
OUT
= 1.5V, Burst Mode Operation
V
IN
= 12V, V
OUT
= 1.5V, Pulse-Skipping Mode
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
5
15
65
50
mA
mA
mA
µA
I
S(VIN)
Input Supply Current V
IN
= 5V, V
OUT
= 1.5V, I
OUT
= 13A
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 13A
4.6
1.853
A
A
Output Specifications
I
OUT1(DC)
, I
OUT2(DC)
Output Continuous Current Range V
IN
= 12V, V
OUT
= 1.5V (Notes 7, 8) 0 13 A
ΔV
OUT1(LINE)
/V
OUT1
ΔV
OUT2(LINE)
/V
OUT2
Line Regulation Accuracy V
OUT
= 1.5V, V
IN
from 4.75V to 16V
I
OUT
= 0A for Each Output,
l
0.01 0.025 %/V
ΔV
OUT1
/V
OUT1
ΔV
OUT2
/V
OUT2
Load Regulation Accuracy For Each Output, V
OUT
= 1.5V, 0A to 13A
V
IN
= 12V (Note 7)
l
0.35 0.5 %
V
OUT1(AC)
, V
OUT2(AC)
Output Ripple Voltage For Each Output, I
OUT
= 0A, C
OUT
= 100µF ×3/
X7R/Ceramic, 470µF POSCAP, V
IN
= 12V,
V
OUT
= 1.5V, Frequency = 400kHz
15 mV
P-P
f
S
(Each Channel) Output Ripple Voltage Frequency V
IN
= 12V, V
OUT
= 1.5V, f
SET
= 1.25V (Note 4) 500 kHz
f
SYNC
(Each Channel)
SYNC Capture Range 400 780
kHz
ΔV
OUTSTART
(Each Channel)
Turn-On Overshoot C
OUT
= 100µF/X5R/Ceramic, 470µF POSCAP,
V
OUT
= 1.5V, I
OUT
= 0A V
IN
= 12V
10
10
mV
mV
t
START
(Each Channel)
Turn-On T
ime C
OUT
= 100µF/X5R/Ceramic, 470µF POSCAP,
No Load, TRACK/SS with 0.01µF to GND,
V
IN
= 12V
5
5
ms
ms
ΔV
OUT(LS)
(Each Channel)
Peak Deviation for Dynamic Load
Load: 0% to 50% to 0% of Full Load
C
OUT
= 22µF ×3/X5R/Ceramic, 470µF POSCAP
V
IN
= 12V, V
OUT
= 1.5V
30 mV
t
SETTLE
(Each Channel)
Settling T
ime for Dynamic Load
Step
Load: 0% to 50% to 0% of Full Load,
V
IN
= 12V, C
OUT
= 100µF, 470µF POSCAP
20 µs
I
OUT(PK)
(Each Channel)
Output Current Limit V
IN
= 12V, V
OUT
= 1.5V 20 A
Control Section
V
FB1
, V
FB2
Voltage at V
FB
Pins I
OUT
= 0A, V
OUT
= 1.5V
l
0.592 0.600 0.606 V
I
FB
(Note 6) –5 –20 nA
V
OVL
Feedback Overvoltage Lockout
l
0.64 0.66 0.68 V