RT8239A/B/C
11
DS8239A/B/C-06 October 2012
www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Typical Operating Characteristics
V
OUT2
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
Load Current (A)
E
ffi
ci
ency (
%
)
V
IN
= 12V, R
TON
= 100k
Ω
, V
ENTRIP1
= 5V,
V
ENTRIP2
= 1.5V, ENLDO = 5V
DEM
ASM
V
OUT2
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
Load Current (A)
E
ffi
ci
ency (
%
)
V
IN
= 20V, R
TON
= 100k
Ω
, V
ENTRIP1
= 5V,
V
ENTRIP2
= 1.5V, ENLDO = 5V
DEM
ASM
V
OUT2
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
Load Current (A)
E
ffi
ci
ency (
%
)
V
IN
= 8V, R
TON
= 100k
Ω
, V
ENTRIP1
= 5V,
V
ENTRIP2
= 1.5V, ENLDO = 5V
DEM
ASM
V
OUT1
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
Load Current (A)
E
ffi
ci
ency (
%
)
V
IN
= 20V, R
TON
= 100k
Ω
, V
ENTRIP1
= 1.5V
V
ENTRIP2
= 5V, ENLDO = 5V
DEM
ASM
V
OUT1
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
Load Current (A)
E
ffi
ci
ency (
%
)
V
IN
= 8V, R
TON
= 100k
Ω
, V
ENTRIP1
= 1.5V
V
ENTRIP2
= 5V, ENLDO = 5V
DEM
ASM
V
OUT1
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
Load Current (A)
E
ffi
ci
ency (
%
)
V
IN
= 12V, R
TON
= 100k
Ω
, V
ENTRIP1
= 1.5V
V
ENTRIP2
= 5V, ENLDO = 5V
DEM
ASM
