Datasheet

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DEVICE INFORMATION
PIN 1
PTV05010W
SLTS242A – FEBRUARY 2005 – REVISED OCTOBER 2005
TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME NO.
V
I
8 The positive input voltage power node to the module, which is referenced to common GND.
V
O
2, 3 The regulated positive power output with respect to the GND node.
This is the common ground connection for the V
I
and V
O
power connections. It is also the 0-Vdc reference for the
GND 1, 6
control inputs. Both pins must be connected to common ground.
The Inhibit pin is an open-collector/drain, active-low input that is referenced to GND. Applying a low-level ground
signal to this input disables the module's output and turns off the output voltage. When the Inhibit control is active,
Inhibit 7
the input current drawn by the regulator is significantly reduced. If the inhibit feature is not used, the control pin
should be left open-circuit. The module then produces an output voltage whenever a valid input source is applied.
A 1% or 0.5% resistor must be connected directly between this pin and GND (pin 1 is recommended) to set the
output voltage of the module higher than its lowest value. The temperature stability of the resistor should be 100
ppm/ ° C (or better). The set-point range is 0.8 V to 3.6 V. The resistor value can be calculated using a formula. If
V
o
Adjust 4
this input is left open-circuit, the output voltage defaults to its lowest value. For further information, consult the
related application note.
The specification table gives the standard resistor values for a number of common output voltages.
This is an analog control input that enables the output voltage to follow an external voltage. This pin becomes
active typically 20 ms after the input voltage has been applied, and allows direct control of the output voltage from
0 V up to the nominal set-point voltage. Within this range, the output follows the voltage at the Track pin on a
volt-for-volt basis. When the control voltage is raised above this range, the module regulates at its set-point
Track 5
voltage. The feature allows the output voltage to rise simultaneously with other modules powered from the same
input bus. If unused, this input should be connected to V
I
.
NOTE: Due to the undervoltage lockout feature, the output of the module cannot follow its own input voltage
during power up. Consult the related Application Information for further guidance.
Front View of Module
Figure 5. Pin Terminal Locations
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