Typical operating characteristics (continued) – Rainbow Electronics MAX8728 User Manual
Page 10
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V
IN
= V
INL
= V
SUPP
= 12V, AV
DD
= 13.5V, V
GON
= 28V, V
GOFF
= -6V, V
OUT1
= 3.3V, FSEL = GND, T
A
= +25°C,
unless otherwise noted.)
MAX8728
Low-Cost, Multiple-Output
Power Supply for LCD Monitors/TVs
10
______________________________________________________________________________________
POSITIVE CHARGE-PUMP
LOAD TRANSIENT RESPONSE
MAX8728toc16
SRC, AC,
200mV/div
I
SRC
,
20mA/div
40
μs/div
NEGATIVE CHARGE-PUMP OUTPUT VOLTAGE
ERROR vs. INPUT VOLTAGE (V
OUT
= -6V)
INPUT VOLTAGE (V)
OUTPUT VOLTAGE ERROR (%)
MAX8728 toc17
7
8
9
10
11
12
13
-5
-4
-3
-2
-1
0
1
2
I
OUT
= 10mA
I
OUT
= 100mA
NEGATIVE CHARGE-PUMP
OUTPUT VOLTAGE ERROR vs. LOAD CURRENT
LOAD CURRENT (A)
OUTPUT VOLTAGE ERROR (%)
MAX8728 toc18
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
0.001
0.01
0.1
1
REF VOLTAGE vs. REF CURRENT
REF CURRENT (
μA)
REF VOLTAGE (V)
MAX8728 toc13
0
20
40
60
80
100
1.994
1.995
1.996
1.997
1.998
1.999
2.000
POSITIVE CHARGE-PUMP OUTPUT VOLTAGE
ERROR vs. INPUT VOLTAGE (V
OUT
= 28V)
INPUT VOLTAGE (V)
OUTPUT VOLTAGE ERROR (%)
MAX8728 toc14
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
I
OUT
= 10mA
I
OUT
= 50mA
POSITIVE CHARGE-PUMP OUTPUT
VOLTAGE ERROR vs. LOAD CURRENT
LOAD CURRENT (A)
OUTPUT VOLTAGE ERROR (%)
MAX???? toc15
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
0.001
0.01
0.1