Negative voltage regulators fit small capacitors
Torex Semiconductor
XC6901/02 series
The XC6901/02 series from Torex are negative voltage regulators that are compatible with small ceramic capacitors.
In addition to an output current capability of 200mA, the wide input (-2.4 to -16V) and output (-0.9 to -12V - available in 0.1V increments) voltage ranges of the XC6901/02 permit these ICs to be used in most applications where negative DC to DC regulation is needed, such as CCD power supplies, LCD modules or digital cameras.
The XC6901/02 series come with a high output voltage accuracy of +/-1.5 per cent for VOUT of less than -2.0V (+/-30mV when VOUT is more than -2V), a low voltage dropout of 400mV at 100mA, a high PSRR of 45dB at 1kHz and a low current consumption of 100uA.
The XC6901/02 protection circuits consist of a foldback-type current limiter and a thermal shutdown circuit.
In addition to these features, the XC6901 series come with a CL discharge function in order to swiftly return the output voltage to the VSS level when disabling the IC.
Whereas the XC6901 is activated by inputting a high level signal to its CE pin, the XC6902 doesn't include a CE pin.
This additional CE pin required by the XC6901 leads to both series being available in different packages.
For the XC6901 - USP-6C for best compromise between size and dissipation, SOT-25 for standard footprints and SOT-89-5 for higher power dissipation; for the XC6902 - the standard SOT-23 package, as well as the SOT-89 package when more dissipation is required.
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