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PTN04050A Datasheet(PDF) 4 Page - Texas Instruments |
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PTN04050A Datasheet(HTML) 4 Page - Texas Instruments |
4 / 18 page www.ti.com PIN ASSIGNMENT PTN04050A (Top View) 1 4 2 3 5 PTN04050A SLTS250 – SEPTEMBER 2005 TERMINAL FUNCTIONS TERMINAL I/O DESCRIPTION NAME NO. The common ground connection for the VI and VO power connections. It is also the reference for the VO GND 1 Adjust control inputs. VI 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 (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 active-low, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left Inhibit 3 I 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. VO Adjust 4 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. VO 5 O The negative output voltage power node with respect to the GND node. 4 |
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