Datasheet

Speciﬁ cation Notes, Cont.:

(5) The On/Off Control Input should use either a switch or an open collector/open drain transistor referenced to

-Input Common. A logic gate may also be used by applying appropriate external voltages which do not exceed

+Vin.

(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting.

(7) For Vout = 1V, Vin must not exceed 32V. For Vout = 0.75V, Vin must not exceed 24V.

(8) Output noise may be further reduced by adding an external ﬁ lter. At zero output current, the output may contain

low frequency components which exceed the ripple speciﬁ cation. The output may be operated indeﬁ nitely with

no load.

(9) All models are fully operational and meet published speciﬁ cations, including “cold start” at –40˚ C.

(10) Regulation speciﬁ cations describe the deviation as the line input voltage or output load current is varied from a

nominal midpoint value to either extreme.

(11) Other input or output voltage ranges will be reviewed under scheduled quantity special order.

(12) Maximum PC board temperature is measured with the sensor in the center of the converter.

(13) Do not exceed maximum power speciﬁ cations when adjusting the output trim.

(14) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external

output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will reduce

output noise but may change the transient response. Newer ceramic caps with very low ESR may require lower

capacitor values to avoid instability. Thoroughly test your capacitors in the application. Please refer to the Output

Capacitive Load Application Note.

(15) Do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times.

Otherwise, you risk having the converter turn off. The undervoltage shutdown is not latching and will attempt to

recover when the input is brought back into normal operating range.

(16) The outputs are not intended to sink appreciable reverse current.

(17) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the

overcurrent condition still exists, the restart current will be removed and then tried again. This short current pulse

prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers

normal operation.

MDC_OKI-T/3-W40 Series.A08 Page 4 of 13

OKI-T/3-W40 Series

Adjustable Output 3-Amp DOSA-SMT DC/DC Converters