Product Reference

I am using the uPC2900 Series. Is there any product of less than 3.3 V

A 2.5 V product is now available.
Use the uPC317 at 2.0 V or lower.
The uPC317 can be used at 1.3 V. However, the difference between the input and output voltages of the uPC317 must be 3 V or more.

Is there a 3-terminal regulator of low-dropout type that can output a negative voltage available?

Unfortunately, no.
Supplement: The uPC79 Series and the uPC337 can produce a negative output voltage.

The uPC1060 is used for the positive voltage. Is there any high-accuracy reference voltage generator that can output a negative voltage?

Unfortunately, no.
There is a method to convert the voltage generated by the uPC1060 into a negative voltage by using an inverting amplifier with a gain of 1 (i.e., 0 dB).
Consider using this method.

What are the differences among the uPC2933, 2905, and uPC2933A, 2905A, uPC2933B, and 2905B?

The major differences are shown in the table below.
For the other differences and details, refer to the Data Sheet of each product.

Parameter	Condition	uPC2933/2905	uPC2933A/2905A	uPC2933B/2905B	Unit
Output voltage(VO)accuracy	IO=0.5A	±4	±3.5	±2	%
Input voltage (VIN)	Maximum rating	20		16	V
Quiescent current(IBIAS)	IO=0mA,TYP.	2.0		1.8	mA
Output ancillary capacitor		47		10	uF
Ripple rejection (R•R)	f=120Hz	64/61		59/55	dB

Does NEC Electronics have a power supply IC with a function to output a reset signal to a microcontroller?

No, I'm sorry; we don't have such a product. However, we do have a stabilized power supply IC with a function to switch output of the power supply voltage on and off.

(2006/03)