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CM2860 Datasheet, PDF (5/10 Pages) List of Unclassifed Manufacturers – 600mA CMOS LDO | |||
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CM2860/CM2861
600mA CMOS LDO
DETAILED DESCRIPTION
The CM2860/CM2861 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, thermal shutdown, and short circuit protection.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, short output protection, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current
and Thermal shutdown circuits become active when the junction temperature exceeds 150â, or the current exceeds 600mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120â.
The CM2860/CM2861 switches from voltage mode to current mode when the load exceeds the rated output current. This
prevents over-stress. The CM2860/2861 also incorporates current fold-back to reduce power dissipation when the output is
short-circuited. This feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%. Full current
is restored when the voltage exceeds 0.8V.
EXTERNAL CAPACITOR
The CM2860/CM2861 is stable with an output capacitor to ground of 2.2μF or greater. It can keep stable even with higher or poor
ESR capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should
be larger than 0.1μF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A âquietâ ground
termination is desirable.
2007/01/11 Rev. 1.7
Champion Microelectronic Corporation
Page 5
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