Step-Up Converter
for Handheld Applications
Typical Operating Characteristics (continued)
(V = 3.6V, C
IN
= 22µF, X5R, 6.3V local and 10µF, X5R, 6.3V, 1µH inductor, circuit of Figure 1, T = +25NC, unless otherwise noted.)
A
OUT
3.7V LINE TRANSIENT
5V LINE TRANSIENT
MAX8969 toc10
MAX8969 toc09
3V
3.7V
3.3V
V
IN
2.6V
V
IN
AC-COUPLED
100mV/div
AC-COUPLED
100mV/div
V
OUT
V
OUT
TREN = V , I
IN OUT
= 200mA
TREN = V , I
IN OUT
= 200mA
100µs/div
100µs/div
3.7V LOAD TRANSIENT (0mA-50mA-0mA)
5V LOAD TRANSIENT (0mA-50mA-0mA)
MAX8969 toc12
MAX8969 toc11
AC-COUPLED
50mV/div
AC-COUPLED
50mV/div
V
V
OUT
OUT
V
V
5V/div
0
5V/div
0
LX
LX
50mA
0
50mA
0
I
I
OUT
OUT
V
= 2.6V
V = 3.8V
IN
IN
200µs/div
200µs/div
3.7V LOAD TRANSIENT
(50mA-500mA-50mA)
5V LOAD TRANSIENT
(50mA-500mA-50mA)
MAX8969 toc13
MAX8969 toc14
AC-COUPLED
200mV/div
AC-COUPLED
100mV/div
V
V
OUT
OUT
5V/div
0
5V/div
0
V
LX
V
LX
500mA
50mA
500mA
50mA
I
OUT
I
OUT
V
= 2.8V
V = 3.8V
IN
IN
20µs/div
20µs/div
6
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
