AIC1631 Datasheet, PDF (7/10 Pages) Analog Intergrations Corporation – 2-Cell, 500mA, Step-Up DC/DC Converter

AIC1631A (continued)
PIN 7: LBI
- The noninverting input of the
battery low detector, of which the
inverting input is internally con-
nects to 1.22V voltage reference.
PIN 8: VOUT- The output voltage feedbacks to
the IC through this pin. If output
voltage was externally set, the
VOUT pin can be tied to any low
impedance node with voltage
between the external power
switch threshold and 7V
AIC1631
APPLICATION EXAMPLES
+V_OUT
(+3V)
LOAD
+V_IN
22Ω
27K
R1
R2
+
+
100µF
C2
47µF
C1
ILIM/SD
VIN
SW
VOUT
LBI
LBO
90
85
V_IN=1.8V
80
V_IN=3.3V
V_IN=3.0V
V_IN=2.5V
V_IN=2.2V
OSCON ⁺
100µF
C3
1N5819
D1
SGND
CGND
V_IN=2.0V
AIC1631-3
75 ₀
100
200
300
400
500
600
Load Current (mA)
Fig. 1 3V Output Step-Up Converter
+V_OUT
(+5V)
LOAD
+V_IN
22Ω
R1
27K
R2
+
+
100µF
C2
47µF
C1
+
OSCON
100µF
C3
1N5819
D1
ILIM/SD
VIN
VOUT
LBI
SW
LBO
SGND
CGND
AIC1631-5
95
90
85
V_IN=2.2V
80 _VIN=2.0V
V_IN=2.5V
V_IN=5.0V
V_IN=4.5V
V_IN=4.0V
V_IN=3.0V
75
0
100
200
300
400
500
600 700
Load Current (mA)
Fig. 2 5V Output Step-Up Converter
7