Datasheet

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PIN ASSIGNMENT
PTN78020A
(Top View)
1
2
7
6
543
PTN78020A
SLTS244A – APRIL 2005 – REVISED MAY 2005
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
The negative output voltage power connection. It is also the reference for the V
O
Adjust control input. For
V
O
1, 7 O
proper operation, pins 1 and 7 must be connected.
V
I
2 I The positive input voltage power node to the module, which is referenced to common GND.
N/C 3 This pin is active and must be isolated from any electrical connection.
A 1% resistor must be connected between pin 4 and pin 7 to set the output voltage of the module lower
than -3 V. If left open-circuit, the output voltage defaults to -3 V. The temperature stability of the resistor
V
O
Adjust 4 I
should be 100 ppm/°C (or better). The set-point range is -15 V to -3 V. The standard resistor value for a
number of common output voltages is provided in the application information.
N/C 5 This pin is active and must be isolated from any electrical connection.
GND 6 I/O The common ground connection for V
I
and V
O
power connections.
4