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All Output Voltage Versions Electrical Characteristics
Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25oC
(Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=24V for the 12V version, ILOAD=500mA)
Parameter
Device Parameters
Symbol
Test Condition
Min.
Typ.
Max.
Unit
50
100
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
Ib
fO
Adjustable Version Only, VFB=1.3V
-
10
150
1.3
nA
KHz
V
127
110
173
173
(Note 5)
1.4
1.5
VSAT
DC
ICL
IOUT=3A (Note 6,7)
-
-
(Note 7)
(Note 8)
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
100
0
-
%
5.5
6.5
Current Limit
Peak Current (Note 6,7)
3.6
4.5
A
Output Leakage Current
Quiescent Current
IL
Output=0V (Note 6,8)
(Note 8)
-
-
-
50
10
uA
IQ
5
mA
250
300
Standby Quiescent Current
ISTBY
ON/OFF pin=5V (Note 9)
-
150
uA
TO220-5L
TO263-5L
TO220-5L
TO263-5L
-
-
-
-
2.5
3.5
28
-
-
-
-
Junction to
Case
oC/W
θJC
Thermal Resistance
Junction to
ambient
oC/W
(Note 10)
θJA
23
ON/OFF Control
VIH
Low (Regulator ON)
-
0.6
ON/OFF Pin Logic Input Threshold
Voltage
1.3
V
VIL
IIH
IIL
High (Regulator OFF)
2.0
-
VLOGIC=2.5V (Regulator OFF)
VLOGIC=0.5V (Regulator ON)
-
-
5
15
5
ON/OFF Pin Input Current
uA
0.02
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: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator system performance.
Note 3: Typical numbers are at 25oC and represent the most likely norm.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 5: The switching frequency is reduced when the second stage current limit is activated.
Note 6: No diode, inductor or capacitor connected to output pin.
Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output
transistor switch OFF.
Note 9: VIN=40V.
Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in2)
DS-RS2596-04 Oct, 2007
www.Orister.com
ORISTER [ ORISTER CORPORATION ]
