Typical operating characteristics (continued) – Rainbow Electronics MAX1677 User Manual
Page 7
MAX1677
Compact, High-Efficiency, Dual-Output
Step-Up and LCD Bias DC-DC Converter
_______________________________________________________________________________________
7
1V/
div
0V
V
OUT
V
IN
50mV/
div
5ms/div
MAIN BOOST CONVERTER
LINE TRANSIENT
MAX1677-16
V
IN
= 2V TO 3V, V
OUT
= 3.3V,
I
LOAD
= 150mA
1V/
div
0V
V
LCD
V
IN
50mV/
div
5ms/div
LCD LINE TRANSIENT
(V
LCD
= +12V)
MAX1677-17
V
IN
= 2V TO 3V, V
LCD
= +12V,
I
OUT
= 5mA
1V/
div
V
OUT
ON
1V/
div
0V
500
µs/div
MAIN BOOST CONVERTER
STARTUP DELAY
MAX1677-19
V
IN
= 2.4V, V
OUT
= 3.3V,
I
LOAD
= 10mA
Typical Operating Characteristics (continued)
(Circuits of Figures 2 and 3, T
A
= +25°C, unless otherwise noted.)
2V/
div
V
LCD
LCDON
10V/
div
10ms/div
LCD STARTUP DELAY
MAX1677-20
V
IN
= 2.4V, V
LCD
= -20V,
I
OUT
= 5mA
1V/
div
0V
V
LCD
V
IN
50mV/
div
5ms/div
LCD LINE TRANSIENT
(V
LCD
= -20V)
MAX1677-18
V
IN
= 2V TO 3V, V
LCD
= -20V,
I
OUT
= 5mA