NQ04009VMA15NRS Datasheet, PDF (19/20 Pages) SynQor Worldwide Headquarters – 16Amp, wide ouput range, Non-Isolated DC/DC Converter

Technical Specification
Non-Isolated
SIP Converter
3.0 - 5.5Vin 16A
For horizontal mount applications (NQ0xxxxHMA parts),
where the inductor and power devices are facing down, the
preferred airflow direction is into the leading edge opposite the
pin header edge, such that air flowing under the NiQor PCB
flows out between the pins and the inductor. With this airflow
direction, and with the inductor firmly contacting the applica-
tion board, the user can apply the thermal derating curves pro-
vided herein (measured using 6 layer 2oz copper board) for
vertical mount with airflow from pin 11 to pin 1. Airflows in
other directions across the horizontally mounted NiQor will
result in temperatures that are higher by about 5 ^OC with pin 11
to pin 1 airflow and about 10 ^OC with pin 1 to pin 11 airflow.
Also, temperature increases of up to 10 ^OC (2 Amp lower der-
ating) can be expected if the inductor thermal interface does
not make good contact to the customer's circuit board.
Layout Suggestion: When using a fixed output NiQor con-
verter, the designer may chose to use the trim function and
would thus be required to reserve board space for a trim resis-
tor. It is suggested that even if the designer does not plan to use
the trim function, additional space should be reserved on the
board for a trim resistor. This will allow the flexibility to use the
wide output voltage trim range NiQor module at a later date.
Any trim resistor should connect to the ground or output node
at one of the respective pins of the NiQor, so as to prevent the
trim level from being affected by load drops through the ground
or power planes.
tion on the current share feature will be provided in a future
revision of this technical specification. Please contact SynQor
engineering support for further details.
OPTIONAL FEATURES
REMOTE SENSE(+) (Pin 3 - Optional): The optional
SENSE(+) input corrects for voltage drops along the conductors
that connect the converter’s output pins to the load.
Pin 3 should be connected to Vout(+) at the point on the board
where regulation is desired. A remote connection at the load
can adjust for a voltage drop only as large as that specified in
this datasheet, that is
Vout(+) – SENSE(+) < Sense Range % x Vout
Pin 3 must be connected for proper regulation of the output volt-
age. If these connections are not made, the converter will deliv-
er an output voltage that is slightly higher than its specified
value.
Note: the output over-voltage protection circuit senses the volt-
age across the output (pins 1, 2 and 4) to determine when it
should trigger, not the voltage across the converter’s sense lead
(pin 3).
CURRENT SHARE (Pin A - Optional): Additional informa-
Product # NQ04T33VMA16
Phone [phone]
Doc.# 005-2NV4T3E Rev. B
7/6/04
Page 19