PTN04050A_15 Datasheet, PDF (4/19 Pages) Texas Instruments – 6-W, 3.3-V/5-V INPUT, WIDE ADJUST OUTPUT, POSITIVE-TO-NEGATIVE CONVERTER

PTN04050A
SLTS250 – SEPTEMBER 2005
PIN ASSIGNMENT
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TERMINAL
NAME
NO.
GND
1
V_I
2
Inhibit
3
V_O Adjust
4
V_O
5
TERMINAL FUNCTIONS
I/O
DESCRIPTION
The common ground connection for the V_I and V_O power connections. It is also the reference for the V_O
Adjust control inputs.
I The positive input voltage power node to the module, which is referenced to common GND.
The Inhibit pin is an open-collector/drain (non-TTL), negative logic input that is referenced to GND.
Applying a low-level ground signal to this input disables the module's output. When the Inhibit control is
I
active-low, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left
open-circuit, the module produces an output voltage whenever a valid input source is applied. The
PTN04050A Inhibit control circuitry must not be shared with another module. Never connect a resistor
between the Inhibit pin and any other voltage reference or GND.
A 1% resistor must be connected between pin 4 and pin 1 to set the output voltage of the module. If left
open-circuit, the output voltage defaults to –1.79 V, which is beyond the recommended operating range.
I The set-point range is –15 V to –3.3 V. The temperature stability of the resistor should be 100 ppm/°C
(or better). The standard resistor value for a number of common output voltages is provided in the
application information.
O The negative output voltage power node with respect to the GND node.
1
5
PTN04050A
(Top View)
2
3
4
4
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