DCM4623xD2H31E0y7z
Electrical Specifications (cont.)
Specifications apply over all line, trim and load conditions, internal temperature TINT = 25ºC, unless otherwise noted. Boldface specifications apply over the
temperature range of -40°C < TINT < 125°C for T grade and -55°C < TINT < 125°C for M grade.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
40
Unit
Power Output Specifications (Cont.)
Initialization delay
tINIT
tON
See state diagram
25
ms
µs
From rising edge EN, with VIN pre-applied. See timing
diagram
Output turn-on delay
Output turn-off delay
200
tOFF
tSS
From falling edge EN. See timing diagram
600
µs
Soft start ramp time
VOUT threshold for max
rated load current
At full rated resistive load, with min COUT-EXT
.
25
ms
During startup, VOUT must achieve this threshold before
VOUT-FL-THRESH
IOUT-START
VOUT-MONOTONIC
10.5
V
A
output can support full rated current
Max load current at startup while VOUT
IOUT at startup
1.78
is below VOUT-FL_THRESH
Monotonic soft-start threshold
voltage
Output voltage rise becomes monotonic with 25% of
preload once it crosses VOUT-MONOTONIC
14.0
2
V
This refers to the minimum time a module needs to be
in the disabled state before it will attempt to start via EN
Minimum required disabled duration
tOFF-MIN
ms
This refers to the minimum time a module needs to be in
tOFF-MONOTONIC the disabled state before it is guaranteed to exhibit
monotonic soft-start and have predictable startup timing
Minimum required disabled duration
for predictable restart
100
ms
Voltage deviation (transient)
Settling time
%VOUT-TRANS
<10
%
Minimum COUT_EXT (10 ↔ 90% load step).
tSETTLE
14.0
ms
Powertrain Protections
Input Voltage Initialization threshold
Input Voltage Reset threshold
VIN-INIT
VIN-RESET
VIN-UVLO-
VIN-UVLO+
VIN-OVLO+
VIN-OVLO-
Threshold to start tINIT delay
75
V
V
V
V
V
V
Latching faults will clear once VIN falls below VIN-RESET
50
Input undervoltage lockout threshold
Input undervoltage recovery threshold
Input overvoltage lockout threshold
Input overvoltage recovery threshold
120.00
190.00
200.00
455
See Timing diagram
See Timing diagram
420
Output overvoltage threshold
Output overvoltage threshold
VOUT-OVP
From 25% to 100% load. Latched shutdown
35.50
V
V
VOUT-OVP-LL
From 0% to 25% load. Latched shutdown
36.50
125
Minimum current limited VOUT
Overtemperature threshold (internal)
Power limit
VOUT-UVP
TINT-OTP
PLIM
Over all operating steady-state line and trim conditions
10.40
773
V
°C
W
VIN overvoltage to cessation of
powertrain switching
tOVLO-SW
Independent of fault logic
For fault logic only
1.4
µs
VIN overvoltage response time
VIN undervoltage response time
Short circuit response time
tOVLO
tUVLO
tSC
200
100
200
µs
ms
µs
Powertrain on, operational state
See Timing diagram
Short circuit, or temperature fault
recovery time
tFAULT
1
s
DCM™ DC-DC Converter
Rev 1.0
Page 6 of 23
08/2017
VICOR [ VICOR CORPORATION ]
