MAX8798AETX+T Maxim Integrated Products, MAX8798AETX+T Datasheet - Page 9

• Manufacturer Part Number: MAX8798AETX+T
• Description: Display Drivers Internal-Switch Boos t Regulator with Int
• Manufacturer: Maxim Integrated Products

Specifications of MAX8798AETX+T

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(Circuit of Figure 2, V
Integrated 3-Channel Scan Driver for TFT LCDs
100
90
80
70
60
50
40
1
STEP-UP REGULATOR EFFICIENCY
V
IN
= 3.0V
vs. LOAD CURRENT
LOAD CURRENT (mA)
V
10
IN
= 5.0V
_______________________________________________________________________________________
IN
3.0
2.5
2.0
1.5
1.0
0.5
0
= 3V, T
V
-40
IN
STEP-UP REGULATOR SUPPLY CURRENT
= 2.2V
I
100
BOOST
Internal-Switch Boost Regulator with
A
-15
HEAVY-LOAD SOFT-START
= +25°C, unless otherwise noted.)
STEP-UP REGULATOR
vs. TEMPERATURE
TEMPERATURE (°C)
10
1000
2ms/div
35
-0.2
-0.4
-0.6
-0.8
-1.0
0.2
0
60
MAX17088 toc04
1
LOAD REGULATION vs. LOAD CURRENT
MAX8798 toc06
I
IN
STEP-UP REGULATOR OUTPUT
85
40
35
30
25
20
15
10
5
0
LOAD CURRENT (mA)
LX
5V/div
0V
V
5V/div
0V
I
500mA/div
0A
SHDN CONTROL
5V/div
0V
L
10
MAIN
V
V
V
IN
IN
IN
= 5.0V
= 2.2V
= 3.0V
Typical Operating Characteristics
100
1.20
1.19
1.18
1.17
1.16
1.15
1.14
1.13
1.12
1.11
1.10
1.6
1000
STEP-UP REGULATOR LOAD TRANSIENT
L = 3.6μH
R
C
COMP
COMP1
200mA LOAD
STEP-UP CONVERTER SWITCHING
FREQUENCY vs. INPUT VOLTAGE
RESPONSE (20mA TO 300mA)
= 100kΩ
= 220pF
2.7
INPUT VOLTAGE (V)
80
70
60
50
40
30
20
10
0
1.6
100μs/div
3.8
IN SUPPLY QUIESCENT CURRENT
0.2A
NO LOAD
vs. IN SUPPLY VOLTAGE
2.7
SUPPLY VOLTAGE (V)
4.9
MAX8798 toc07
3.8
6.0
V
10V/div
0V
I
1A/div
0A
0mV
V
200mV/div
LOAD CURRENT
200mA/div
0mA
L
LX
MAIN
4.9
(AC-COUPLED)
6.0
9