PL2576-XXXF5 Datasheet, PDF (5/10 Pages) Cystech Electonics Corp. – Simple Switcher 3A Step- Down Voltage Regulator

Spec. No. : C543F5
CYStech Electronics Corp. Issued Date : 2004.02.27
Revised Date :
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
Ib
fO
VSAT
DC
ICL
IL
IQ
ISTBY
Feedback bias current _{VOUT=5V (adjustable version only)} 50
Oscillator frequency (Note 8)
52
Saturation voltage IOUT=3A (Note 4)
1.4
Maximum duty cycle (Note 5)
(ON)
98
Current limit
(Notes 4, 8)
5.8
Output leakage current
(Notes 6, 7)
Output = 0V
Output = -1V
-
7.5
Quiescent current
(Note 6)
5
Standby quiescent
current
ON/OFF pin=5V (OFF)
50
Min
-
47/42
-
93
4.2/3.5
-
-
-
-
Max
100/500
58/63
1.8/2.0
-
6.9/7.5
2
30
10
200
Units
nA
kHz
V
%
A
mA
mA
µA
ON/OFF Control
VIH
ON/OFF pin logic
VIL _{input level}
IIH _{ON/OFF pin input}
current
IIL
VOUT=0V
VOUT=Nominal output voltage
ON/OFF pin=5V (OFF)
ON/OFF pin=0V (ON)
1.4
2.2/2.4
1.2
-
12
-
0
-
-
V
1.0/0.8
V
30
µA
10
µA
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