MAX1518 Maxim Integrated Products, MAX1518 Datasheet - Page 7

• Manufacturer Part Number: MAX1518
• Description: (MAX1516 - MAX1518) TFT-LCD DC-DC Converters
• Manufacturer: Maxim Integrated Products

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4
(Circuit of Figure 1. V
unless otherwise noted.)
100
90
80
70
60
50
40
30
1
V
IN
= 3.3V
STEP-UP EFFICIENCY
V
vs. LOAD CURRENT
IN
LOAD CURRENT (mA)
= 5.0V
10
_______________________________________________________________________________________
IN
A: V
B: V
C: INDUCTOR CURRENT, 1A/div
STEP-UP REGULATOR SOFT-START
= 5V, V
IN
MAIN
, 5V/div
, 5V/div
100
MAIN
V
(HEAVY LOAD)
OUT
= 13V
2ms/div
= 13V, V
1000
TFT-LCD DC-DC Converters with
GON
MAX1516 toc04
1.4
1.3
1.2
1.1
1.0
= 24V, V
2.5
0V
0V
0A
B
C
A
3.0
GOFF
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
3.5
= -8V, V
4.0
Operational Amplifiers
Typical Operating Characteristics
OUT1
4.5
= V
A: LOAD CURRENT, 1A/div
B: V
C: INDUCTOR CURRENT, 1A/div
5.0
OUT2
MAIN
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE
5.5
, 200mV/div, AC-COUPLED
= V
OUT3
10µs/div
10
= V
8
6
4
2
0
2.5
OUT4
3.0
STEP-UP SUPPLY CURRENT
CURRENT INTO INDUCTOR
= V
vs. SUPPLY VOLTAGE
MAX1516 toc05
SUPPLY VOLTAGE (V)
OUT5
NO LOAD, SUP DISCONNECTED,
R1 = 95.3kΩ, R2 = 10.2kΩ
3.5
CURRENT INTO IN PIN
13V
0A
200mA
= 6.5V, T
4.0
A
B
C
4.5
A
= +25°C
5.0
5.5
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