SOT-89 Step-up Dual-Mode Switcher with Shutdown
Electrical Characteristics ILC6380BP-50
V
OUT
= 5.0V, F
OSC
= 100kHz T
A
= 25°C. Unless otherwise specified, V
IN
= V
OUT
X0.6, I
OUT
= 50mA. See the schematic, figure 4.
Parameter
Output Voltage
Input Voltage
Oscillation Startup Voltage
Operation Startup Voltage
Supply Current 1
(See Note 2)
Symbol
V
OUT
V
IN
V
ST2
V
ST1
I
DD
1
I
DD
2
R
EXTH
R
EXTL
F
OSC
MAXDTY
V
CEH
V
CEL
I
CEH
I
CEL
EFFI
T
SS
Conditions
Test Circuit of Figure 2
V
OUT
= V
ST2
I
OUT
= 1mA
EXT = 10kΩ pull-up to 5V,
V
OUT
= 4.5V
EXT = 10kΩ pull-up to 5V,
V
OUT
= 5.5V
EXT = 10kΩ pull-up to 5V,
V
OUT
= 4.5V, V
EXT
= V
OUT
– 0.4V
EXT = 10Ω pull-up to 5V,
V
OUT
= 4.5V, V
EXT
= V
OUT
- 0.4V
EXT = 10kΩ pull-up to 5V, V
OUT
=
4.5V, Measuring of EXT waveform
EXT = 10kΩ pull-up to 5V, V
OUT
=
4.5V, Measuring of EXT high state
EXT = 10kΩ pull-up to 5V, V
OUT
=
4.5V, Existence of Oscillation
EXT = 10kΩ pull-up to 5V, V
OUT
=
4.5V, Stopped EXT Oscillation
EXT: 10kΩ pull-up to 5V,
V
OUT
= 4.5V, V
CE
= V
OUT
X 0.95V
EXT = 10kΩ pull-up to 5V,
V
OUT
= 4.5V, V
CE
= 0V
Min
4.875
Typ
5.000
78.6
6.9
30
30
85
80
0.75
100
87
Max
5.125
10
0.8
0.9
131.1
13.8
50
50
115
92
Units
V
V
V
V
µA
µA
Ω
Ω
kHz
%
V
Supply Current 2
EXT “High” On-Resistance
EXT “Low” On-Resistance
Oscillator Frequency
Maximum Duty Ratio
CE “High” Voltage
CE “Low” Voltage
CE “High” Current
CE “Low” Current
Efficiency
Slow Start Time
Notes:
0.20
0.25
-0.25
85
10
V
µA
µA
%
msec
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 (I
IN
)”
Typical Applications
SD
3
2
1
CE
V
OUT
SD
3
2
1
CE
V
OUT
L
+
V
IN
4
L
+
C
L
V
IN
C
B
4
5
ILC6380
5
ILC6381
C
L
Tr
R
B
GND
Figure 3
L: 100µH ( SUMIDA, CD-54)
SD: Diode (Schottky diode; MATSUSHITA MA735)
CL: 16V 47µF (Tantalum Capacitor; NICHICON, F93)
Figure 4
L:
SD:
CL:
RB:
CB:
Tr:
47µH ( SUMIDA, CD-54)
Diode (Schottky diode; MATSUSHITA MA735)
16V 47µF (Tantalum Capacitor; NICHICON, F93)
1kW
3300pF
2SC3279, 2SDI628G
Impala Linear Corporation
ILC6380/1 1.4
(408) 574-3939
www.impalalinear.com
Sept 1999
3
IMPALA [ Impala Linear Corporation ]
