Embedded Power for
Business-Critical Continuity
Rev.06.27.07
SMT12F
5 of 5
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0.312 [7.93] MAX.
INSTALLED HT.
Figure 5 - Mechanical Drawing
Pin No. Pin Description
1 Trim: A 1% 0.1 W resistor must be directly connected
between this pin and pin 8 (GND) to set the output
voltage to a lower value than 3.3 V. The temperature
stability of the resistor should be 100 ppm/°C or better.
The set point range for the 3.3 V model is from 3.3 V to
0.9 V. The resistor required for a given output voltage
may be calculated from the following formula.
If left open circuit the output voltage will default to 3.3 V.
The set point range for the 2.6 V model is from 2.6-0.9 V.
The resistor required for a given output voltage may be
calculated from the following formula
If left open circuit the output voltage will default to 2.6 V.
For further information on output voltage adjustment
consult the Application Note 165.
2 Margin+: When this input is asserted to High, the output
voltage is increased by 5%. This function is independant
of trim and sense.
Pin No. Pin Description
3 Remote ON/OFF: Applying a high level signal to this
input disables the module’s output and turns off the
output voltage.
When the Remote ON/OFF control is active, the
input current drawn by the regulator is significantly
reduced. If the Remote ON/OFF pin is left open-
circuit, the module will produce an output whenever
a valid input source is applied.
4 Margin-: When this input is asserted high, the
output voltage is decreased by 5% from the nominal.
This functions is independant of trim and sense.
5 V sense +: The sense input allows the regulation
circuit to compensate for voltage drop between the
module and the load. For optimal voltage accuracy
Vo Sense should be connected to Vout node of
bypass capacitor. It can also be left disconnected.
6 V sense -: The VSense should be connected to the
ground of a bypass capacitor near the load or left
open circuit.
7 +Vout: The regulated positive power output with
respect to the GND node.
8 Ground: This is the common ground connection for
the Vin and Vout power connections. It is also the 0
Vdc reference for the control inputs.
9 +Vin: The positive input voltage power node to the
module,which is referenced to common GND.
10 Power Good: This pin indicates the status of the
output voltage. Power Good is driven low if output
voltage deviates outside of specified limits.
