XC6371/6372/6373
Series
■ELECTRICAL
CHARACTERISTICS (Continued)
XC6371/72E501PR
PARAMETER
Output Voltage
Maximum Input Voltage
Operation Start Voltage
Oscillation Start Voltage
No Load Input Voltage
Supply Current 1
Supply Current 2
Lx Switch-On
Resistance
Lx Leak Current
Oscillation Frequency
Maximum Duty Ratio
PFM Duty Ratio (*4)
Lx Limit Voltage
Efficiency
Slow-Start Time
V
OUT
=5.0V, FOSC=100kHz
SYMBOL
CONDITIONS
V
OUT
V
IN
V
ST1
External Components Connected, I
OUT
=1mA
No external components,
V
ST2
Apply voltage to V
OUT
, Lx:10kΩpull-up to 5V
I
IN
V
IN
=V
OUT
×0.8,
I
OUT
=0mA(*1)
Same as V
ST2
,
I
DD1
Apply output voltage×0.95 to V
OUT
Same as V
ST2
,
I
DD2
Apply output voltage×1.1 to V
OUT
R
SWON
I
LXL
FOSC
MAXDTY
PFMDTY
V
LxLMT
EFFI
T
SS
Same as I
DD1
, V
LX
=0.4V
No external components, V
OUT
=V
LX
=10V
Same as I
DD1
, Measuring of Lx waveform
Same as I
DD1
, Measuring of Lx waveform
Same as I
DD1
, Measuring of Lx waveform
Same as I
DD1
, Apply output voltage to Lx,
Voltage required to produce FOSC×2
MIN.
4.875
10
-
-
-
-
-
-
-
85
80
10
0.7
-
4.0
TYP.
5.000
-
-
-
12.8
80.2
8.2
1.4
-
100
87
17
-
85
10.0
Ta=25℃
MAX.
UNITS
5.125
V
-
V
0.90
V
0.80
25.7
133.8
16.5
2.4
1.0
115
92
25
1.3
-
20.0
V
μA
μA
μA
Ω
μA
kHZ
%
%
V
%
ms
NOTE: Unless otherwise stated, connect V
DD
to V
OUT
, V
IN
=V
OUT
×0.6,
I
OUT
=50mA. See Typical Application Circuits, Circuit 3.
*1: The Schottky diode (SD) must be type MA2Q735, with reverse current (I
R
)<1.0μA at reverse voltage (V
R
)=10.0V.(XC6372E)
*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 actually provided by external V
IN
source is represented by "No
Load Input Current (I
IN
)".
*3: When PWM operates at PWM Mode.
*4: When PFM operates at PFM Mode.(XC6372E)
*5: When the V
DD
and V
OUT
pins are independently used, the voltage range at the V
DD
pin should be 2.2V to 10V.
V
DD
=0.8V. However, output voltage and oscillation frequency are properly stabilized when V
DD
=2.2V or higher.
The IC operates from
591
TOREX [ TOREX SEMICONDUCTOR ]
