AMS1085 DATASHEET PDF

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See thermal regulation specifications for changes in output voltage due to heating effects.

AMS 데이터시트(PDF) – Advanced Monolithic Systems

Internal resistors are limiting the internal current paths on the AMS adjustment pin, therefore even with capacitors on the adjustment pin no protection diode is needed to ensure device safety under short-circuit conditions. Protection Diodes Unlike older regulators, the AMS family does not need any protection diodes between the adjustment pin and the output and from the output to the input to prevent over-stressing the die.

Connected as shown, RP is not multiplied by the divider ratio.

Dropout voltage 1,2v Line Regulation typically at 0. A diode from output to input is recommended, when a crowbar circuit at the input of the AMS is used. In this case, there are two stable output operating points for the regulator.

However maximum junction temperature ratings should not be exceeded under continuous normal load conditions. F are used in the output of many regulators. The size of the required adjust pin capacitor is a function of the input ripple frequency.

This is the lowest resistance path for the heat flow. Unlike older regulators with a single junction-to-case thermal resistance specification, the data datashfet for these new regulators provides a separate thermal resistance and maximum junction temperature for both the Control Section and the Power Transistor.

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Internal resistors are limiting the internal current paths on the AMS adjustment pin, therefore even with capacitors on the ams11085 pin no protection diode is needed to ensure device safety under short-circuit conditions.

To further improve stability and transient response of these devices larger values of output capacitor can be used. Thermal Considerations The AMS series have internal power and thermal limiting circuitry designed to protect the device under overload conditions.

For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Stability The circuit design used in the AMS series requires the use of eatasheet output capacitor as part of the device frequency compensation.

F solid tantalum on the output will ensure stability for all operating conditions. F Overload Recovery When the power is first qms1085 on, as the input voltage rises, the output follows the input, permitting the regulator to start up into heavy loads. Minimum load current is defined as the minimum output current required to maintain regulation. With this double intersection, dafasheet power supply may need to be cycled down to zero and brought up again to make the output recover.

For guaranteed specifications and test conditions, see the Electrical Characteristics. Connected as shown, RP is not multiplied by the divider ratio. Pin compatible with older three terminal adjustable regulators, these devices offer the advantage of a lower dropout voltage, more precise reference tolerance and improved adtasheet stability with temperature. To ensure safe operating temperatures and reflect more accurately the ans1085 temperature, new thermal resistance specifications have been developed.

General Description This guide. The AMS language capability is somewhat like having a simulator programmer with the simulator. If R1 were connected to the load, the effective resistance between the regulator and the load would be: To ensure good transient response with heavy load current changes capacitor values on the order of ? Advanced Monolithic Systems, Inc.

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Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. The dropout voltage of the device is guaranteed datassheet 1. Negative side sensing is a true Kelvin connection, with the bottom of the output divider returned to the negative side of the load.

Calculations for both temperatures under certain conditions of ambient temperature and heat sink resistance and to ensure that both thermal limits are met. The load line for such a load may intersect two points on the output current curve.

At 10kHz dqtasheet 0.

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. The guaranteed specifications apply only for the test conditions listed.

AMS1085 数据手册 ( 数据表 ) – Advanced Monolithic Systems Inc

A problem can occur with a heavy datassheet load when the input voltage is dahasheet and the output voltage is low, when the removal of an output short will not permit the output voltage to recover.

Three Terminal Adjustable or Fixed Voltages 1. Operates Down to 1V Dropout? It is important to keep the positive lead between regulator and load as short as possible and use large wire or PC board traces. Line and Load regulation are guaranteed up to the maximum power dissipation of 15W. At 10kHz only 0. Current limit is also trimmed, minimizing the stress under overload conditions on both the regulator and power source circuitry.

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