Page No. : 2/8
Block Diagram
Absolute Maximum Ratings
Symbol
V
CC
V
FB
V
EN
V
OUTPUT
P
D
T
OPR
T
STG
Parameter
V
CC
Pin Voltage
Feedback Pin Voltage
EN Pin Voltage
Switch Pin Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Range
V
SS
-0.3 to V
SS
+22
V
SS
-0.3 to V
CC
V
SS
-0.3 to V
IN
+0.3
V
SS
-0.3 to V
IN
+0.3
Internally limited
-20 to +125
-40 to +150
Units
V
V
V
V
mW
o
C
o
C
Electrical Characteristics
(V
IN
= 12V, Ta=25°C, unless otherwise specified)
Symbol
V
IN
V
FB
I
FB
I
SW
I
SSS
ΔV
OUT
/V
OUT
ΔV
OUT
/V
OUT
F
OSC
F
OSC1
V
SH
V
SL
I
SH
I
SL
I
OCSET
T
SS
R
DSON
EFFI
θ
JA
Parameter
Input Voltage
Feedback Voltage
Feedback Bias Current
Switch Current
Current Consumption During Power
Off
Line Regulation
Load Regulation
Oscillation Frequency
Frequency of Current Limit or Short
Circuit Protect
EN Pin Input Voltage
EN Pin Input Leakage Current
OCSET Pin Bias Current
Soft-Start Time
Internal MOSFET R
DSON
Efficiency
Thermal Resistance
Junction-to-Ambient
Conditions
-
I
OUT
=0.1A
I
OUT
=0.1A
-
V
EN
=0V
V
IN
=5V½18V
I
OUT
=0.1 to 4A
Measure waveform at SW pin
Measure waveform at SW pin
Evaluate oscillation at SW pin
Evaluate oscillation stop at SW pin
-
-
-
-
V
IN
=5V，V
FB
=0V
V
IN
=12V，V
FB
=0V
V
IN
=12V，V
OUT
=5V，I
OUT
=4A
-
Min.
3.6
0.782
-
4.5
-
-
-
300
10
2.0
-
-
-
75
0.3
-
-
-
Typ.
-
0.8
0.1
-
10
2
0.2
350
-
-
-
20
-10
90
2
110
70
90
65
Max.
20
0.818
0.5
-
-
4
0.5
400
-
-
0.8
-
-
105
5
150
100
-
-
Unit
V
V
uA
A
uA
%
%
KHz
KHz
V
uA
uA
uA
ms
mΩ
%
o
C/W
DS-RS6514-02
March, 2009
www.Orister.com
ORISTER [ ORISTER CORPORATION ]
