SOT-89 Step-Up PFM Switcher with Auto-Load Sense
Electrical Characteristics ILC6391
VOUT = 5.0V TA = 25°C. Unless otherwise specified, VIN = VOUT x 0.6, IOUT = 50mA. See schematic, Fig.4
Parameter
Output Voltage
Input Voltage
Symbol
VOUT
VIN
Conditions
Test Circuit of Figure 4
Min
4.875
Typ
5.000 5.125
10
Max
Units
V
V
Operation Startup Voltage
Operation Hold Voltage
Supply Current 1 (See Note 1)
Supply Current 2
EXT “High” On-Resistance
EXT “Low” On-Resistance
Duty Ratio 1
VST
VST
IOUT = 1mA
IOUT = 1mA
VOUT = 4.75V
VOUT = 5.5V
VOUT = 4.75V, VEXT = VOUT-0.4
VOUT = 4.75V, VEXT = 0.4
VOUT = 4.75V, Measuring of
EXT waveform
VIN = VOUT x 0.95, IOUT = 1mA,
Measuring of EXT High State
VOUT = 4.75V, 75% duty
VIN = VOUT x 0.95, 55% duty
VOUT = 4.75V
0.80
0.9
V
V
µA
µA
Ω
0.70
IDD
IDD
1
2
31.7
2.4
50
50
75
63.4
4.8
75
75
80
REXTH
REXTL
DUTY 1
Ω
%
70
50
Duty Ratio 2
DUTY 2
55
60
%
Maximum Oscillation Freq. 1
Maximum Oscillation Freq. 2
Stand = by Current
MFO 1
MFO 2
ISTB
85
153
100
180
115
207
0.5
kHz
kHz
µA
V
CE “High” Voltage
VCEH
VOUT = 4.75V, Existence of
EXT Oscillation
0.75
CE “Low” Voltage
VCEL
VOUT = 4.75V, Disappearance
of EXT Oscillation
0.20
V
CE “High” Current
CE “Low” Current
Efficiency
ICEH
ICEL
EFFI
VCE = VOUT = 4.75V
VOUT = 4.75V, VCE = 0V
Test Circuit Figure 4
0.25
-0.25
µA
µA
%
85
Note:
1. “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.
Impala Linear Corporation
ILC6390 1.1
www.impalalinear.com
(408) 574-3939
Feb 2001
3
IMPALA [ Impala Linear Corporation ]
