Datasheet

MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V
IN
= V
INL
= V
SUP
= 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)
MAX17014 toc04
4.00ms/div
A: V
IN
, 5V/div
B: V
OUT
, 1V/div
C: INDUCTOR CURRENT,
500mA/div
D: V
LX2
, 10V/div
A
B
C
D
0V
0A
0V
0V
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT
MAX17014 toc05
LOAD CURRENT (A)
EFFICIENCY (%)
10.10.01
50
60
70
80
90
45
55
65
75
85
100
95
40
0.001
10
STEP-UP REGULATOR
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX17014 toc06
LOAD CURRENT (A)
AV
DD
(V)
2.01.0 1.50.5
16.02
16.04
16.06
16.08
16.10
16.00
02.5
STEP-UP REGULATOR
SOFT-START (HEAVY LOAD)
MAX17014 toc07
10.00ms/div
A: EN2, 5V/div
B: DEL2, 5V/div
C: AV
DD
, 5V/div
D: V
SUI
, 5V/div
E: INDUCTOR CURRENT,
1.00A/div
A
B
C
D
E
STEP-UP REGULATOR
LOAD-TRANSIENT RESPONSE
MAX17014 toc08
20.0µs/div
A: LOAD CURRENT,
1A/div
B: AV
DD
, 200mV/div
C: INDUCTOR CURRENT,
2A/div
A
50mA
B
16V
C
0A
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE
MAX17014 toc09
10.0µs/div
A: LOAD CURRENT,
1A/div
B: AV
DD
, 200mV/div
C: INDUCTOR CURRENT,
2A/div
A
0.2A
B
16V
C
0A