Datasheet

MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
______________________________________________________________________________________ 11
STEP-UP REGULATOR CURRENT LIMIT
vs. INPUT VOLTAGE
MAX17014 toc10
INPUT VOLTAGE (V)
STEP-UP CURRENT LIMIT (A)
151410 11 12 139
3.0
4.0
3.5
4.5
5.0
5.5
6.0
2.5
816
AV
DD
= 16V
AV
DD
= 18V
L1 = 4.7
µ
H
(CDEP134NP-4R8M, I
SAT
= 9.3A)
TIME-DELAY LATCH
RESPONSE TO OVERLOAD
MAX17014 toc11
200ms/div
A: V
OUT
, 5V/div
B: V
AVDD
, 10V/div
C: V
GON
, 50V/div
D: V
GOFF
, 5V/div
E: L1 INDUCTOR CURRENT,
5A/div
A
B
C
D
E
0V
0V
0V
0V
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX17014 toc12
V
IN
(V)
SWITCHING FREQUENCY (MHz)
1310 11 129
1.192
1.194
1.196
1.198
1.200
1.190
8
14
VL LOAD REGULATION
MAX17014 toc13
LOAD CURRENT (mA)
VL (V)
8020 40 60
4.96
4.99
5.00
4.98
4.97
5.01
5.02
5.03
5.04
5.05
4.95
0
100
EN1 = EN2 = VL
EN1 = EN2 = GND
REFERENCE VOLTAGE
LOAD REGULATION
MAX17014 toc14
LOAD CURRENT (
µ
A)
REFERENCE VOLTAGE (V)
15050 100
1.248
1.247
1.246
1.249
1.250
1.251
1.245
0
200
EN1 = EN2 = VL
EN1 = EN2 = GND
POSITIVE CHARGE-PUMP REGULATOR
NORMALIZED LINE REGULATION
MAX17014 toc15
V
IN
(V)
V
SRC
(%)
1612 14
-0.04
-0.07
-0.01
0.02
0.05
-0.10
10 181511 13 17
I
SRC
= 0A
I
SRC
= 25mA
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.)