MAX1997ETJ Maxim Integrated Products, MAX1997ETJ Datasheet - Page 8

• Manufacturer Part Number: MAX1997ETJ
• Description: LCD Drivers
• Manufacturer: Maxim Integrated Products

Specifications of MAX1997ETJ

• Dc: 0618
• Lead Free Status / Rohs Status: No

STEP-UP REGULATOR LOAD TRANSIENT RESPONSE
Quintuple/Triple-Output TFT LCD Power Supplies
with Fault Protection and VCOM Buffer
(Circuit of Figure 1, V
unless otherwise noted.)
8
C
C
D
A
B
A
B
_______________________________________________________________________________________
(WITH LAG COMPENSATION, FIGURE 9)
A: I
B: V
C: INDUCTOR CURRENT, 500mA/div
R7 = 76.8kΩ, R8 = 12.1kΩ, R10 = 1.5kΩ, C10 = 470pF
A: V
B: V
C: V
D: V
STEP-UP REGULATOR SOFT-START
MAIN
MAIN
SHDN
GATE
DRAIN
MAIN
= 0 TO 200mA, 200mA/div
, 5V/div
, 5V/div
, 5V/div
= 9V, 50mV/div, AC-COUPLED
, 5V/div
10µs/div
1ms/div
IN
= 3.3V, V
MAX1997 toc08
MAX1997 toc11
MAIN
200mA
0
9V
8.9V
1A
0.5A
0
5V
0
5V
0
5V
0
10V
5V
0
= 9V, V
STEP-UP REGULATOR LOAD TRANSIENT RESPONSE
C
C
D
A
B
A
B
(WITHOUT LAG COMPENSATION, FIGURE 1)
A: I
B: V
C: INDUCTOR CURRENT, 1A/div
A: V
B: V
C: V
D: V
V
Typical Operating Characteristics (continued)
ONN
MAIN
MAIN
MAIN
SOURCE
G_ON
GATE_ON
GATE_OFF
< V
= 50mA TO 1A, 1A/div
, 10V/div
ONP
= 9V, 100mV/div, AC-COUPLED
POWER-UP SEQUENCE
, 10V/div
, 10V/div
, 10V/div
< V
= 20V, V
(2
ON2
µ
s PULSES)
4µs/div
4ms/div
G_OFF
MAX1997 toc09
MAX1997 toc12
= -7V, V
1A
50mA
9V
8.9V
2A
1A
0
10V
0
10V
0
20V
10V
0
0
-10V
LOGIC
STEP-UP REGULATOR LOAD TRANSIENT RESPONSE
= 2.5V, V
C
A
B
C
D
A
B
(WITH LAG COMPENSATION, FIGURE 9)
A: I
B: V
C: INDUCTOR CURRENT, 1A/div
R7 = 76.8kΩ, R8 = 12.1kΩ, R10 = 1.5kΩ, C10 = 470pF
A: V
B: V
C: V
D: V
V
ONN
MAIN
MAIN
MAIN
SOURCE
GATE_ON
GATE_OFF
> V
= 50mA TO 1A, 1A/div
, 10V/div
= 9V, 100mV/div, AC-COUPLED
ONP
POWER-UP SEQUENCE
, 10V/div
GAMMA
, 10V/div
, 10V/div
> V
(2
ON2
µ
s PULSES)
10µs/div
4ms/div
= 8.6V, T
MAX1997 toc10
MAX1997 toc13
A
= +25°C,
1A
50mA
9V
8.9V
2A
1A
0
10V
0
10V
0
20V
10V
0
0
-10V