SLAN-03D2A0 Datasheet, PDF (16/25 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
3 Vdc – 14.4 Vdc Input, 0.6 Vdc - 5.5 Vdc /3 A Outputs
Mar. 16, 2012
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Overcurrent Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting
circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup
mode. The unit operates normally once the output current is brought back into its specified range.
Overtemperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will
shutdown if the overtemperature threshold of TBD^oC(typ) is exceeded at the thermal reference point T_ref . Once
the unit goes into thermal shutdown it will then wait to cool before attempting to restart.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will
begin to operate at an input voltage above the undervoltage lockout turn-on threshold.
Power Good
The SLAN-03D2Ax provides a Power Good (PGOOD) signal that is implemented with an open-drain output to
indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-
asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that
would result in the output voltage going ±10% outside the setpoint value. The PGOOD terminal can be connected
through a pullup resistor (suggested value 100K) to a source of 5VDC or lower.
Dual Layout
Identical dimensions and pin layout of Analog and Digital modules permit migration from one to the other without
needing to change the layout. To support this, 2 separate Trim Resistor locations have to be provided in the
layout. For the digital modules, the resistor is connected between the TRIM pad and SGND and in the case of the
analog module it is connected between TRIM and GND.
Figure 44
MODULE TRIM
(PVX003 / PDT003)
SIG_GND
GND
Rtrim1
for
Digital
Rtrim2
for
Analog
Caution – Do not connect SIG_GND to GND elsewhere in the layout
Layout to support either Analog or Digital on the same pad.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel [phone]  Fax [phone]  www.belfuse.com
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