Datasheet

MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
_______________________________________________________________________________________ 9
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V
IN
= V
INL
= V
SUPP
= 12V, AV
DD
= 16V, V
GON
= 34.5V, V
GOFF
= -6V, V
OUT1
= 3.3V, T
A
= +25°C, unless other-
wise noted.)
STEP-DOWN REGULATOR
SOFT-START (HEAVY LOAD)
MAX17113 toc04
0V
0V
0A
V
IN
5V/div
V
OUT
2V/div
3.3V
0V
V
LX2
10V/div
INDUCTOR
CURRENT
500mA/div
2ms/div
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
55
60
65
70
75
80
85
90
95
100
50
0.01 10
MAX17113 toc05
STEP-UP REGULATOR
OUTPUT VOLTAGE vs. LOAD CURRENT
LOAD CURRENT(A)
OUTPUT-VOLTAGE ERROR (%)
1.51.00.5
0
0.2
0.4
0.6
0.8
-0.2
0 2.0
MAX17113 toc06
STEP-DOWN REGULATOR
SOFT-START (HEAVY LOAD)
MAX17113 toc07
0V
0V
0V
0V
0A
EN2
5V/div
V
AVDD
10V/div
INDUCTOR
CURRENT
1A/div
DEL2
5V/div
V
SRC
20V/div
10ms/div
STEP-UP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17113 toc08
0V
INDUCTOR
CURRENT
2A/div
0A
LOAD
CURRENT
1A/div
R
COMP
= 50.5kI
C
COMP
= 330pF
V
AVDD
500mV/div
100mA
100Fs/div
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE
MAX17113 toc09
16V
INDUCTOR
CURRENT
2A/div
0A
LOAD
CURRENT
2A/div
V
AVDD
200mV/div
0.2A
10Fs/div