DCM4623xD2K04A5yzz
Electrical Specifications (cont.)
Specifications apply over all line, trim and load conditions, internal temperature T
INT
= 25ºC, unless otherwise noted.
Boldface
specifications apply over the
temperature range of -40°C < T
INT
< 125°C for T grade and -55°C < T
INT
< 125°C for M grade.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Power Output Specifications (Cont.)
Output capacitance, ESR (ext.)
Initialization delay
Output turn-on delay
Output turn-off delay
Soft start ramp time
V
OUT
threshold for max
rated load current
I
OUT
at startup
Monotonic soft-start threshold
voltage
Minimum required disabled duration
Minimum required disabled duration
for predictable restart
Voltage deviation (transient)
Settling time
R
COUT-EXT
t
INIT
t
ON
t
OFF
t
SS
V
OUT-FL-THRESH
I
OUT-START
V
OUT-MONOTONIC
t
OFF-MIN
At 10 kHz, excludes component tolerances
See state diagram
From rising edge EN, with V
IN
pre-applied. See timing
diagram
From falling edge EN. See timing diagram
At full rated resistive load. Typ spec is 1-up with min
C
OUT-EXT
. Max spec is for arrays with max C
OUT-EXT
During startup, V
OUT
must achieve this threshold before
output can support full rated current
Max load current at startup while V
OUT
is below V
OUT-FL_THRESH
Output voltage rise becomes monotonic with 10% of
preload once it crosses V
OUT-MONOTONIC
This refers to the minimum time a module needs to be
in the disabled state before it will attempt to start via EN
This refers to the minimum time a module needs to be in
the disabled state before it is guaranteed to exhibit
monotonic soft-start and have predictable startup timing
Minimum C
OUT_EXT
(10
↔
90% load step), excluding
load line.
Powertrain Protections
Input Voltage Initialization threshold
Input Voltage Reset threshold
Input undervoltage lockout threshold
Input undervoltage recovery threshold
Input overvoltage lockout threshold
Input overvoltage recovery threshold
Output overvoltage threshold
Output overvoltage threshold
Minimum current limited V
OUT
Overtemperature threshold (internal)
Power limit
V
IN
overvoltage to cessation of
powertrain switching
V
IN
overvoltage response time
V
IN
undervoltage response time
Short circuit response time
Short circuit, or temperature fault
recovery time
V
IN-INIT
V
IN-RESET
V
IN-UVLO-
V
IN-UVLO+
V
IN-OVLO+
V
IN-OVLO-
V
OUT-OVP
V
OUT-OVP-LL
V
OUT-UVP
T
INT-OTP
P
LIM
t
OVLO-SW
t
OVLO
t
UVLO
t
SC
t
FAULT
Powertrain on, operational state
See Timing diagram
1
Independent of fault logic
For fault logic only
2.9
200
100
200
See Timing diagram
From 25% to 100% load. Latched shutdown
From 0% to 25% load. Latched shutdown
Over all operating steady-state line and trim conditions
125
215
420
4.25
4.66
2.20
See Timing diagram
Threshold to start t
INIT
delay
Latching faults will clear once V
IN
falls below V
IN-RESET
50
96.00
152.00
160.00
455
75
V
V
V
V
V
V
V
V
V
°C
W
µs
µs
ms
µs
s
<10
3.2
10
10
25
200
600
40
2.5
4.55
2.5
2
40
mΩ
ms
µs
µs
ms
V
A
V
ms
t
OFF-MONOTONIC
%V
OUT-TRANS
t
SETTLE
100
ms
%
ms
DCM™ DC-DC Converter
Page 7 of 25
Rev 1.2
07/2017
VICOR [ VICOR CORPORATION ]
