TC1043 Datasheet, PDF (9/20 Pages) Microchip Technology – Linear Building Block . Low Power Voltage Reference with Dual Op Amp, Dual Comparator, and Shutdown Mode

TC1043
FIGURE 4-2:
PRECISION BATTERY MONITOR
To System DC/DC
Converter
R4, 470k, 1%
VDD
+
AMP1
–
R2, 330k, 1%
R5, 7.5M
VDD
+
CMPTR1
–
BATTLOW
3V
ALKALINE
TC1043
R1, 270k, 1%
VR
VDD
–
CMPTR2
+
R6, 7.5M
BATTFAIL
R3, 470k, 1%
FIGURE 4-3:
DUAL LOW DROPOUT REGULATOR
VIN
TC1043
V_DD
+
AMP1
–
2N2222
V_OUT1
C1, 1µF
V_R
RA₁
V_DD
+
AMP2
–
SHDN
2N2222
V_OUT2
RA₂
C2, 1µF
RB₁
RB₂
VOUT = VR x (R_A + R_B)/R_B
© 2002 Microchip Technology Inc.
DS21347B-page 9