Spec. No. : C543F5
Issued Date : 2004.02.27
Revised Date :
CYStech Electronics Corp.
Page No. : 5/10
All Output Voltage Versions Electrical Characteristics
Specifications with standard type face are for TJ=25°C, and those with boldface type apply over full
operating temperature range. Unless otherwise specified, VIN=12V for the 3.3V, 5.0V, and adjustable versions,
VIN=25V for the 12V version, and VIN=30V for the 15V version. ILOAD=500mA.
Symbol
Parameter
Conditions
Typ
50
52
1.4
Min
-
Max
Units
nA
kHz
V
Feedback bias current
Oscillator frequency
100/500
58/63
1.8/2.0
Ib
fO
VOUT=5V (adjustable version only)
(Note 8)
IOUT=3A (Note 4)
(Note 5)
47/42
VSAT Saturation voltage
-
Maximum duty cycle
DC
98
93
-
%
A
(ON)
(Notes 4, 8)
ICL
IL
Current limit
5.8
4.2/3.5
6.9/7.5
(Notes 6, 7) Output = 0V
-
-
2
Output leakage current
Quiescent current
mA
mA
µA
Output = -1V
7.5
-
30
(Note 6)
IQ
5
-
-
10
Standby quiescent
ISTBY
50
200
ON/OFF pin=5V (OFF)
current
ON/OFF Control
VIH
VOUT=0V
1.4
1.2
2.2/2.4
-
V
V
ON/OFF pin logic
VIL
VOUT=Nominal output voltage
-
1.0/0.8
input level
IIH
12
0
-
-
30
10
µA
µA
ON/OFF pin input
ON/OFF pin=5V (OFF)
ON/OFF pin=0V (ON)
current
IIL
Note 1 : Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate
conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed
specifications and test conditions, see the Electrical Characteristics.
Note 2 : All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face).
Note 3 : External components such as the catch diode, inductor, input and output capacitors can affect switching regulator
system performance. When the PL2576 is used as shown in the figure 2 test circuit, system performance will be as shown in
system parameters section of Electrical Characteristics.
Note 4 : Output pin sourcing current. No diode, inductor or capacitor connected to output.
Note 5 : Feedback pin removed from output and connected to 0V.
Note 6 : Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V versions, and +25V for
the 12V and 15V versions, to force the output transistor OFF.
Note 7 : VIN=40V.
Note 8 : The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload which causes
the regulated output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the
average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
PL2576-XXXF5
CYStek Product Specification
CYSTEKEC [ CYSTECH ELECTONICS CORP. ]
