Rainbow Electronics MAX8728 - 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