The maximum power dissipation of the LM1770 is dependent on the package type and thermal resistance. For the LM1770TMF/NOPB, which is a 5-pin SOT-23 package, the maximum power dissipation is approximately 1.4W at a junction temperature of 150°C.
To ensure stability in the LM1770 voltage regulator, it is recommended to use a minimum output capacitance of 10uF with an ESR (Equivalent Series Resistance) of less than 5 ohms. Additionally, the input capacitor should be at least 1uF with an ESR of less than 5 ohms.
The minimum input voltage required for the LM1770 to operate is 2.5V, but it is recommended to use an input voltage of at least 3V to ensure proper regulation.
No, the LM1770 is a positive voltage regulator and cannot be used as a negative voltage regulator. If a negative voltage regulator is required, a different device such as the LM337 or LM137 should be used.
The output voltage of the LM1770 can be adjusted by using a resistive divider network between the output and the adjust pin. The output voltage is determined by the ratio of the resistors and the internal reference voltage of the LM1770.
LM1770TMF/NOPB datasheet
by Texas Instruments
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