SOT-89 Step-Up PFM Switcher with Auto-Load Sense
Absolute Maximum Ratings (T
A
= 25°C)
Parameter
V
OUT
Input Voltage
Voltage on pin L
X
Current on pin L
X
Voltage on pin EXT
Current on pin EXT
CE Input Voltage
V
DD
Input Voltage
Continuous Total Power Dissipation
Operating Ambient Temperature
Storage Temperature
Symbol
V
OUT
VL
X
IL
X
V
EXT
I
EXT
V
CE
V
DD
P
D
(SOT-25)
P
D
(SOT-89)
T
opr
T
stg
Ratings
12
12
400
V
SS
-0.3~V
OUT
+0.3
±50
12
12
150
500
-30~+80
-40~+125
Units
V
V
mA
V
mA
V
V
mW
°C
°C
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
Output Voltage
Input Voltage
Oscillation Startup Voltage
Oscillation Hold Voltage
NO-Load Input Current
Supply Current 1 (See Note 2)
Supply Current 2
L
X
Switch-On Resistance
L
X
Leakage Current
Duty Ratio 1
Duty Ratio 2
Maximum Oscillation Freq. 1
Maximum Oscillation Freq. 2
Stand = by Current
CE “High” Voltage
CE “Low” Voltage
CE “High” Current
CE “Low” Current
L
X
Limit Voltage
Symbol
V
OUT
V
IN
V
ST
V
HLD
I
IN
I
DD
1
I
DD
2
R
SWON
I
LXL
DUTY 1
DUTY 2
MFO 1
MFO 2
I
STB
V
CEH
V
CEL
I
CEH
I
CEL
V
LXLMT
Conditions
Test Circuit of Figure 1
I
OUT
= 1mA
I
OUT
= 1mA
I
OUT
= 0mA
(See Note 1)
V
OUT
= 4.75V
V
OUT
= 5.5V
V
OUT
= 4.75V, VL
X
= 0.4
No external components, V
OUT
=
VL
X
= 10V
V
OUT
= 4.75V, Measuring of L
X
waveform
V
OUT
= 4.75V, Measuring of L
X
on-time
V
OUT
= 4.75V, 75% duty
V
OUT
= 4.75V, 55% duty
V
OUT
= 4.75V
V
OUT
= 4.75V, Existance of L
X
Oscillation
V
OUT
= 4.75V, Disappearance of
L
X
Oscillation
V
CE
= V
OUT
x 0.95
V
OUT
= 4.75V, V
CE
= 0V
V
OUT
= 4.75V, fosc > MFO x 2
(See Note 3)
Min
4.875
Typ
5.000
0.80
Max
5.125
10
0.9
10.6
63.4
4.8
4.3
1.0
80
60
115
207
0.5
0.70
5.3
31.7
2.4
2.8
Units
V
V
V
V
µA
µA
µA
Ω
µA
%
%
kHz
kHz
µA
V
V
µA
µA
V
70
50
85
153
0.75
75
55
100
180
0.20
0.25
-0.25
1.1
0.7
Note:
1. The Schottky diode (S.D.), in figure 3 must be type MA735, with Reverse current (IR) < 1.0µA at reverse voltage (VR)=10.0V
2. “Supply Current 1” is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which
results in less average power consumption.
The current that is actually provided by external V
IN
source is represented by “No-Load Input Current”
3. The switching frequency is determined by the delay time of the internal comparator and MFO1, which sets the min. on-time
Impala Linear Corporation
ILC6390 1.1
(408) 574-3939
www.impalalinear.com
Feb 2001
2
IMPALA [ Impala Linear Corporation ]
