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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 T
J
=25
o
C
(Unless otherwise specified, V
IN
=12V for the 3.3V, 5V, and adjustable version and V
IN
=24V for the 12V version, I
LOAD
=500mA)
Parameter
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
Current Limit
Output Leakage Current
Quiescent Current
Standby Quiescent Current
Symbol
I
b
f
O
V
SAT
DC
I
CL
I
L
I
Q
I
STBY
θ
JC
Test Condition
Device Parameters
Adjustable Version Only, V
FB
=1.3V
(Note 5)
I
OUT
=3A (Note 6,7)
(Note 7)
(Note 8)
Peak Current (Note 6,7)
Output=0V (Note 6,8)
(Note 8)
ON/OFF pin=5V (Note 9)
Min.
‐
127
110
‐
‐
3.6
‐
‐
‐
‐
‐
‐
‐
‐
2.0
‐
‐
Typ.
40
150
1.16
100
0
‐
‐
5
85
2.5
3.5
28
30
1.4
6
0.02
Max.
Unit
50
nA
100
173
KHz
173
1.4
V
1.5
‐
%
Thermal Resistance
TO220‐5L
Junction to Case
TO263‐5L
θJA(Note
TO220‐5L
Junction to ambient
10)
TO263‐5L
ON/OFF Control
V
IH
V
IL
I
IH
I
IL
Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
=2.5V (Regulator OFF)
V
LOGIC
=0.5V (Regulator ON)
5.5
A
6.9
50
uA
30
mA
200
uA
300
‐
o
C/W
‐
‐
o
C/W
‐
0.6
‐
15
5
V
uA
ON/OFF Pin Logic Input Threshold Voltage
ON/OFF Pin Input Current
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.
2.
External components such as the catch diode, inductor, input and output capacitors, and voltage programming
resistors can affect switching regulator system performance.
3.
Typical numbers are at 25
o
C and represent the most likely norm.
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).
5.
The switching frequency is reduced when the second stage current limit is activated.
6.
No diode, inductor or capacitor connected to output pin.
7.
Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version,
8.
to force the output transistor switch OFF.
9.
V
IN
=40V.
10. Junction to ambient thermal resistance. (With copper area of approximately 3in
2
)
DS‐RS2596‐07
September, 2009
www.Orister.com
ORISTER [ ORISTER CORPORATION ]
