DCM4623xD2H26F0y7z
Signal Specifications
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.
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
EN disable threshold
Internally generated VCC
SYMBOL
VENABLE-EN
VENABLE-DIS
VCC
CONDITIONS / NOTES
MIN NOM MAX UNIT
2.31
V
V
V
0.99
3.21 3.30 3.39
DIGITAL
INPUT
Any
EN internal pull up
resistance to VCC
RENABLE-INT
9.5
10.0 10.5
kΩ
Trim: TR
• The TR pin enables and disables trim functionality when VIN is initially applied to the DCM converter.
When Vin first crosses VIN-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 VCC and is referenced to the -IN pin of the converter.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN NOM MAX UNIT
Trim disabled when TR above this threshold
at power up
TR trim disable threshold
VTRIM-DIS
3.20
V
V
DIGITAL
INPUT
Startup
Trim enabled when TR below this threshold
at power up
TR trim enable threshold
VTRIM-EN
3.15
Internally generated VCC
TR pin functional range
VCC
3.21 3.30 3.39
V
V
VTRIM-RANGE
0.00 1.51 3.16
Operational
with Trim
enabled
ANALOG
INPUT
VOUT referred TR
pin resolution
VOUT-RES
With VCC = 3.3 V
50
mV
TR internal pull up
resistance to VCC
RTRIIM-INT
9.5
10.0 10.5
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 VCC during microcontroller initialization and will remain high until soft start process starts.
SIGNAL TYPE
STATE
ATTRIBUTE
SYMBOL
CONDITIONS / NOTES
MIN NOM MAX UNIT
FT internal pull up
resistance to VCC
Any
RFAULT-INT
474
3.0
4
499
524
kΩ
V
FT voltage
VFAULT-ACTIVE At rated current drive capability
Over-load beyond the ABSOLUTE MAXIMUM
DIGITAL
OUTPUT
FT current drive capability
IFAULT-ACTIVE
mA
FT Active
ratings may cause module damage
Delay from cessation of switching to
FT Pin Active
FT response time
tFT-ACTIVE
200
µs
DCM™ DC-DC Converter
Rev 1.0
Page 7 of 23
12/2017
VICOR [ VICOR CORPORATION ]
