Datasheet

PIN ASSIGNMENT
PTN78000
(TopView)
1
4
2
3
5
PTN78000W , PTN78000H
www.ti.com ...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
This is the common ground connection for the V
I
and V
O
power connections. It is also the 0 V
dc
GND 1 I/O
reference for the Inhibit and V
O
Adjust control inputs.
V
I
2 I The positive input voltage power node to the module, which is referenced to common GND.
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 3 I
Inhibit control is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin
is left open-circuit, the module will produce an output whenever a valid input source is applied.
A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage. If left
open-circuit, the output voltage defaults to its minimum adjust value. The temperature stability of the
V
O
Adjust 4 O resistor should be 100 ppm/ ° C (or better). The PTN78000W set-point range is 2.5 V to 12.6 V. The
PTN78000H set-point range is 11.85 V to 22 V. The standard resistor value for a number of common
output voltages is provided in the application information.
V
O
5 O The regulated positive power output with respect to the GND node.
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Product Folder Link(s): PTN78000W PTN78000H