MAX1779 Maxim, MAX1779 Datasheet - Page 7

• Manufacturer Part Number: MAX1779
• Description: Low-Power Triple-Output TFT LCD DC-DC Converter
• Manufacturer: Maxim

(Circuit of Figure 5, V
100mA
50mA
5.0V
4.9V
4.9V
5.0V
5.1V
0
0
LOAD TRANSIENT WITHOUT INTEGRATOR
LOAD TRANSIENT WITHOUT INTEGRATOR
A. V
B. V
INTG = REF,
A. V
B. I
INTG = REF, FIGURE 5
MAIN
(L = 10µH, 500µs PULSE)
(L = 33µH, 500µs PULSE)
MAIN
MAIN
MAIN
= 10mA to 100mA, 50mA/div
= 5V, 50mV/div
= 5mA to 50mA, 25mA/div
= 5V, 50mV/div
FIGURE 6
Low-Power Triple-Output TFT LCD DC-DC
100µs/div
100µs/div
_______________________________________________________________________________________
IN
= +3.3V, T
A
MAX1779-16
MAX1779-19
= +25°C, unless otherwise noted.)
B
A
B
A
400mA
200mA
100mA
200mA
5.0V
5.0V
4.9V
5.1V
Typical Operating Characteristics (continued)
0
0
0
LOAD TRANSIENT WITHOUT INTEGRATOR
A. V
B. I
C. I
INTG = REF, FIGURE 6
A. V
B. I
FIGURE 5
L
MAIN
MAIN
MAIN
, 200mA/div
MAIN
(L = 10µH, 5µs PULSE)
(L = 33µH, 5µs PULSE)
= 10mA to 100mA, 100mA/div
= 5V, 100mV/div
LOAD TRANSIENT
= 5V, 50mV/div
= 20mA to 200mA, 100mA/div
10µs/div
10µs/div
MAX1779-17
MAX1779-20
B
A
C
B
A
100mA
500mA
5.1V
4.9V
5V
2V
5V
3V
0
0
0
A. V
B. I
FIGURE 5
A. V
B. V
C. I
FIGURE
MAIN
L
(L = 33µH, 500µs PULSE)
MAIN
SHDN
MAIN
, 500 mA/div
STARTUP WAVEFORM
Converter
6, R
LOAD TRANSIENT
= 10mA to 100mA, 50mA/div
= 5V, 50mV/div
= 0 to 2V, 2V/div
= 5V, 1V/div
MAIN
(L = 10µH)
100µs/div
200µs/div
= 100Ω
MAX1779-18
MAX1779-21
7
B
A
B
C
A