15

www.3peakic.com.cn

REV1.2

TP2011/TP2012/TP2014

Ultra-Low Power 200nA, 1.6V, RRIO, Push-Pull Output Comparators

T2011

t

t

Figure 8. Relaxation Oscillator

Windowed Comparator

Figure 9. shows one approach to designing a windowed comparator using a single TP2012 chip. Choose different

thresholds by changing the values of R1, R2, and R3. OutA provides an active-low undervoltage indication, and OutB

gives an active-low overvoltage indication. ANDing the two outputs provides an active-high, power-good signal. When

1

)/R

3

R

2

R

1

(R

r

V

OH

V









)

2

R

1

)/(R

3

R

2

R

1

(R

r

V

UH

V











OutA

+InB

+InA

-InB

-InA

TP2012

OutB

UnderVolt

OverVolt

Power

Good

AND

Gate

Figure 9. Windowed Comparator