FP115 datasheet(6/9 Pages) FEELING

6 / 9 page

FP115

This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.

No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.

Website: http://www.feeling-tech.com.tw

Rev. 0.6

6/9

Function Description

Internal Reference Regulator

The FP115 includes a 1.25V high precision shut regulator to reduce application circuit external

part number. This 1.25V reference voltage is divided down by resistor string to 156mV then connects

to OPA1 and OPA2’s non-inverting input for comparison. Applications with VCC voltage higher than 20V

are not suitable for this chip as an internal 2KΩ resistor which connected between Vcc and 1.25V

reference will draw too much current and increase power loss.

1.25V

156mV

VCC

GND

Figure 5 1.25V Reference Regulator With Resistor Divider

For example:

If VCC is 6V, the power loss of the 2KΩ resistor is (6-1.25)

2/2KΩ=11.3mW. When VCC is 12V, the

power loss of the 2K

Ω resistor is (12-1.25)2/2KΩ=57.8mW.

FP115 Datasheet(PDF) 6 Page - Feeling Technology Corp.