RT8239A/B/C
12
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.
V
OUT1
Switching Frequency vs. Load Current
0
20
40
60
80
100
120
140
160
180
200
220
240
0.001
0.01
0.1
1
10
Load Current (A)
S
w
itchi
ng Fr
equency (
kH
z)
1
V
IN
= 8V, R
TON
= 100k
Ω
,
ENLDO = VIN, V
ENTRIP1
= 1.5V,
V
ENTRIP2
= 5V
ASM
DEM
V
OUT1
Switching Frequency vs. Load Current
0
20
40
60
80
100
120
140
160
180
200
220
240
260
0.001
0.01
0.1
1
10
Load Current (A)
Sw
itch Fr
equency (
kH
z)
1
V
IN
= 12V, R
TON
= 100k
Ω
,
ENLDO = VIN, V
ENTRIP1
= 1.5V,
V
ENTRIP2
= 5V
ASM
DEM
V
OUT1
Switching Frequency vs. Load Current
0
20
40
60
80
100
120
140
160
180
200
220
240
260
0.001
0.01
0.1
1
10
Load Current (A)
S
w
itchi
ng Fr
equency (
kH
z)
1
V
IN
= 20V, R
TON
= 100k
Ω
,
ENLDO = VIN, V
ENTRIP1
= 1.5V,
V
ENTRIP2
= 5V
ASM
DEM
V
OUT2
Switching Frequency vs. Load Current
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0.001
0.01
0.1
1
10
Load Current (A)
S
w
itchi
ng Fr
equency (
kH
z)
1
V
IN
= 12V, R
TON
= 100k
Ω
,
ENLDO = VIN, V
ENTRIP1
= 5V,
V
ENTRIP2
= 1.5V
ASM
DEM
V
OUT2
Switching Frequency vs. Load Current
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0.001
0.01
0.1
1
10
Load Current (A)
S
w
itchi
n
g Fr
equency (
kH
z)
1
V
IN
= 20V, R
TON
= 100k
Ω
,
ENLDO = VIN, V
ENTRIP1
= 5V,
V
ENTRIP2
= 1.5V
ASM
DEM
V
OUT2
Switching Frequency vs. Load Current
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
0.001
0.01
0.1
1
10
Load Current (A)
S
w
itchi
ng Fr
equency (
kH
z)
1
V
IN
= 8V, R
TON
= 100k
Ω
,
ENLDO = VIN, V
ENTRIP1
= 5V,
V
ENTRIP2
= 1.5V
ASM
DEM
