AIC1631 Datasheet, PDF (9/10 Pages) Analog Intergrations Corporation – 2-Cell, 500mA, Step-Up DC/DC Converter

AIC1631
APPLICATION EXAMPLES (CONTINUED)
+V_IN
+V_OUT
(+5V)
100Ω
R1
130
D2
LOAD
50µH
L1 _{C2 +}
ILIM/SD
VIN
VOUT
1N4148
LBI
1M ^1M 680K
110
R2 ^R3 R4
90
47µF
100µF
C1
1N5819
+ ^D1
SW
LBO
SGND
CGND
AIC1631-5
* CTL= GND in Burst Mode
CTL=VIN in Normal Mode
*CTL
15nF
Q1
C4
2N3904
Q2
+
2N3904
C3
1µF
70
50
30
10
0
V_IN=1.8V
V_IN=2.0V
V_IN=2.5V
V_IN=3V
10
20
30
40
Load Current (µA)
Fig. 6 Low Supply Current Burst Mode Step-Up Converter
+V_OUT
LOAD
OSCON ⁺
100µF
C3
+V_IN
22Ω
27K
R1
+ _100µF
C2
+ _47µF
C1
R2
ILIM/SD VOUT
VIN
LBI
R1
SW
LBO
1N5819
D1
GND
FB
AIC1631A
R2
Fig.7 Adjustable Output Voltage Step-Up Converter
9