SOT-89 Step-Up PFM Switcher with Auto-Load Sense
Application Circuits
SD
3
1
3
2
1
CE
V
OUT
L
V
IN
L
+
ILC6390CM
1
2
3
V
IN
4
ILC6390CP
5
C
L
+
V
OUT
C
L
GND
SD
CE
GND
L: 100µH (SUMIDA, CD-54
SD: Diode (Schottky diode; MATSUSHITA MA 735)
C
L
: 16V 47µF (Tantalum Capacitor; NICHICON, f93)
SD
3
2
1
CE
SD
V
OUT
3
2
1
CE
V
OUT
L
+
V
IN
L
C
L
V
IN
C
B
4
5
+
ILC6391CM
4
5
ILC6391CP
C
L
Tr
R
GND
Tr
R
B
GND
L: 47µH (SUMIDA, CD-54)
SD: Diode (Schottky diode; MATSUSHITA MA735)
C
L
: 16V 47µF (Tantalum Capacitor; NICHICON, F93)
R
B
: 1kΩ
C
B
: 3300pF
Tr: 2SC3279, 2SDI628G
Electrical Characteristics ILC6390
V
OUT
= 5.0V T
A
= 25°C. Unless otherwise specified, V
IN
= V
OUT
x 0.6, I
OUT
= 50mA. See schematic, fig. 3.
Parameter
Efficiency
Symbol
EFFI
Conditions
Test Circuit of Figure 3
Min
Typ
85
Max
Units
%
Impala Linear Corporation
ILC6390 1.1
(408) 574-3939
www.impalalinear.com
Feb 2001
4
IMPALA [ Impala Linear Corporation ]
