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ATH22T05-9S Datasheet(PDF) 2 Page - Astec America, Inc |
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ATH22T05-9S Datasheet(HTML) 2 Page - Astec America, Inc |
2 / 14 page North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Pin Descriptions Vin: The positive input voltage power node to the mod- ule, which is referenced to common GND. Vout: The regulated positive power output with respect to the GND node. GND: This is the common ground connection for the Vin and Vout power connections. It is also the 0 VDC reference for the control inputs. Inhibit: The Inhibit pin is an open-collector/drain negative logic 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, the input current drawn by the regula- tor is significantly reduced. If the Inhibit pin is left open-circuit, the module will produce an output when- ever a valid input source is applied. Vo Adjust: A 0.1 W, 1 % tolerance (or better) resistor must be connected directly between this pin and pin 7 (GND) to set the output voltage to the desired value. The set point range for the output voltage is from 0.8 V to 3.6 V. The resistor required for a given output voltage may be calculated from the following formula. If left open circuit, the module output will default to its lowest output voltage value. For further information on output voltage adjustment consult the related application note. Rset = 10 k · 0.8 V – 2.49 k Vout – 0.8 V The specification table gives the preferred resistor values for a number of standard output voltages. Vo Sense: The sense input allows the regulation circuit to compensate for voltage drop between the module and the load. For optimal voltage accuracy Vo Sense should be connected to Vout. It can also be left disconnected. Track: 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 will follow 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 voltage. The feature allows the output voltage to rise simultaneously with other modules pow- ered from the same input bus. If unused, the input may be left unconnected. Note: Due to the under-voltage lockout feature, the output of the module cannot follow its own input voltage during power up. For more information, consult the related application note. Margin Down: When this input is asserted to GND, the output voltage is decreased by 5% from the nominal. The input requires an open-collector (open-drain) interface. It is not TTL compatible. A lower percent change can be accomodated with a series resistor. For further infor- mation, consult the related application note. Margin Up: When this input is asserted to GND, the output voltage is increased by 5%. The input requires an open-collector (open-drain) interface. It is not TTL compatible. The percent change can be reduced with a series resistor. For further information, consult the related application note. Ordering Information ATH22T05 Series —5-V Input 22-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module REVISION 00 (3DEC2003) Input Voltage Output Voltage Output Current Model Number 4.5V to 5.5V 0.8V1 to 3.6V 22A ATH22T05-9(S)(J) Options: “-J” - Through-hole Termination, Tray Packaging “-SJ” - SMT Termination, Tray Packaging “-S” - SMT Termination, T&R Packaging Notes: 1Preset output voltage is 0.8V; externally adjustable to 3.6V through the Vo,Adjust pin |
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