DCM4623xD2K04A5yzz
Signal Specifications
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.
Enable: EN
• The EN pin enables and disables the DCM converter; when held low the unit will be disabled.
• The EN pin has an internal pull-up to VCC and is referenced to the -IN pin of the converter.
SIGNAL TYPE
STATE
ATTRIBUTE
EN enable threshold
DIGITAL
INPUT
EN disable threshold
Any
Internally generated V
CC
EN internal pull up
resistance to V
CC
SYMBOL
V
ENABLE-EN
V
ENABLE-DIS
V
CC
R
ENABLE-INT
0.99
3.21
9.5
3.30
10.0
3.39
10.5
CONDITIONS / NOTES
MIN
NOM
MAX
2.31
UNIT
V
V
V
kΩ
Trim: TR
• The TR pin enables and disables trim functionality when V
IN
is initially applied to the DCM converter.
When Vin first crosses V
IN-UVLO+
, the voltage on TR determines whether or not trim is active.
• If TR is not floating at power up and has a voltage less than TR trim enable threshold, trim is active.
• If trim is active, the TR pin provides dynamic trim control with at least 30Hz of -3dB control bandwidth over the output voltage of the DCM converter.
• The TR pin has an internal pull-up to V
CC
and is referenced to the -IN pin of the converter.
SIGNAL TYPE
DIGITAL
INPUT
STATE
ATTRIBUTE
TR trim disable threshold
Startup
TR trim enable threshold
Internally generated V
CC
ANALOG
INPUT
Operational
with Trim
enabled
TR pin functional range
V
OUT
referred TR
pin resolution
TR internal pull up
resistance to V
CC
V
TRIM-EN
V
CC
V
TRIM-RANGE
V
OUT-RES
R
TRIIM-INT
With V
CC
= 3.3 V
9.5
SYMBOL
V
TRIM-DIS
CONDITIONS / NOTES
Trim disabled when TR above this threshold
at power up
Trim enabled when TR below this threshold
at power up
3.15
3.21
0.00
3.30
1.93
4
10.0
10.5
3.39
3.16
MIN
NOM
MAX
3.20
UNIT
V
V
V
V
mV
kΩ
Fault: FT
• The FT pin is a Fault flag pin.
• When the module is enabled and no fault is present, the FT pin does not have current drive capability.
• Whenever the powertrain stops (due to a fault protection or disabling the module by pulling EN low), the FT pin output Vcc and provides current to drive
an external ciruit.
• When module starts up, the FT pin is pulled high to V
CC
during microcontroller initialization and will remain high until soft start process starts.
SIGNAL TYPE
STATE
Any
DIGITAL
OUTPUT
FT Active
ATTRIBUTE
FT internal pull up
resistance to V
CC
FT voltage
FT current drive capability
FT response time
SYMBOL
R
FAULT-INT
V
FAULT-ACTIVE
I
FAULT-ACTIVE
t
FT-ACTIVE
At rated current drive capability
Over-load beyond the ABSOLUTE MAXIMUM
ratings may cause module damage
Delay from cessation of switching to
FT Pin Active
CONDITIONS / NOTES
MIN
474
3.0
4
200
NOM
499
MAX
524
UNIT
kΩ
V
mA
µs
DCM™ DC-DC Converter
Page 8 of 25
Rev 1.2
07/2017
VICOR [ VICOR CORPORATION ]
