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SLTS171A Datasheet(PDF) 3 Page - Texas Instruments |
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SLTS171A Datasheet(HTML) 3 Page - Texas Instruments |
3 / 13 page For technical support and more information, see inside back cover or visit www.ti.com Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures. Efficiency vs Output Current Power Dissipation vs Output Current Performance Data; Vin =5V (See Note A) Output Ripple vs Output Current PT5800 Series 18-A 5-V Input Adjustable Integrated Switching Regulator Pin Descriptions Vin: The positive supply voltage input for the module with respect to the common ground (GND). Vout: This is the regulated output voltage from the mod- ule with respect to the common ground (GND). GND: The common ground node to which the input, output, and external control signals are referenced. Sense(–): Provides the regulator with the ability to sense the set-point voltage directly across the load. For opti- mum output voltage accuracy this pin should always be connected to GND, even for applications that demand a relatively light load. Sense(+): When used with Sense(–), the regulation circuitry will compensate for voltage drop between the converter and the load. The pin may be left open circuit, but con- necting it to Vout will optimize load regulation. Inhibit*: This is an open-collector (open-drain) negative logic input, referenced to GND. Pulling this pin to GND disables the module’s output voltage. If Inhibit* is left open circuit, the output will be active whenever a valid input source is applied. Vo Adjust: This pin is used to trim the output voltage over a typical range of ±15% of nominal. The adjust- ment method uses an external resistor. The resistor is connected from Vo Adjust to either the (-)Sense or (+)Sense, in order to adjust the output either up or down, respec- tively. Consult the related application note for the adjust limits of a specific part. Margin Dn*: When this open-collector (open-drain) input is asserted to GND, the output voltage is automatically decreased by 5% from the nominal. This feature is used in applications where the load circuit must be tested for operation at the extreme values of its supply voltage tolerance. Margin Up*: This is an open-collector (open-drain) input. When this is asserted to GND, the output voltage is automatically increased by 5% from the nominal. Typical Characteristics 50 60 70 80 90 100 0 3 6 9 12 15 18 Iout (A) PT5801 PT5802 PT5803 PT5804 PT5805 PT5806 0 10 20 30 40 50 0369 12 15 18 Iout (A) PT5802 PT5801 PT5803 PT5804 PT5805 PT5806 0 1 2 3 4 5 6 0369 12 15 18 Iout (A) 20 30 40 50 60 70 80 90 0369 12 15 18 Iout (A) 200LFM 120LFM 60LFM Nat conv Airflow Safe Operating Curves; Vin =5V (See Note B) SLTS171A JANUARY 2003 - REVISED - MARCH 2003 |
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