APW1172
Electrical Characteristics (Cont.)
The * denotes the specifications that apply over TA = -40 ~ 85oC. Typical values are at TA = 25oC.
VCC = 12V unless otherwise specified.
APW1172
Symbol
Parameter
Test condition
Unit
Min
Typ
Max
Reference Section
IREF = 0mA
3.234
3.2
3.3
3.3
3.366
3.399
V
V
VREF VREF Output Voltage
IREF = 0mA to 5mA, VCC = 4.4A to
22V
*
Line Regulation
Load Regulation
Short Circuit Current
Other
IREF = 0mA, VCC = 4.4A to 22V
IREF = 0mA to 5mA
5
8
10
15
30
mV
mV
mA
10
18
Thermal Limiting Protection
Hysteresis
160
30
°
°
C
C
Over-Voltage Protection
Threshold Voltage
VCOMP = 0.8V
*
120
125
130
%
Typical Application Circuit
VREF = 3.3V
VOUT = 3.3V
L
22uH
1
8
7
6
5
OUT
VCC
GND
VREF
FB
2
3
4
SYNC
INH
COMP
D2
RC1
APW1172
1N4148
D1
COUT
4.3K
CIN
VIN
1N5819
100uF
22uF 4.8V to 22V
R1
RF1
RF2
C1
CC1
137K
5.6K
3.3K
1uF
2.2nF
CC2
Soft Start
Circuit
220pF
Copyright ã ANPEC Electronics Corp.
5
www.anpec.com.tw
Rev. A.4 - Aug., 2005
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
