Rainbow Electronics MAX8815A - Manual (Page 6)

MAX8815A
1A, 97% Efficiency, 30µA Quiescent Current
Step-Up Converter with True Shutdown
6 _______________________________________________________________________________________
200ns/div
HEAVY-LOAD SWITCHING
WAVEFORMS
50mV/div
AC-COUPLED
V OUT
V LX
I LX
MAX8815A toc14
0A
5V/div
0V
1A/div
I OUT = 500mA
2 μs/div
LIGHT-LOAD SWITCHING
WAVEFORMS (SKIPB = LOW)
20mV/div
AC-COUPLED V OUT
V LX
I LX
MAX8815A toc15
0A
2V/div
0V
500mA/div
I OUT = 10mA
200ns/div
LIGHT-LOAD SWITCHING
WAVEFORMS (SKIPB = HIGH)
20mV/div
AC-COUPLED V OUT
V LX
I LX
MAX8815A toc16
0A
2V/div
0V
500mA/div
I OUT = 10mA
100 μs/div
LINE TRANSIENT
20mV/div
AC-COUPLED
V IN
V OUT
MAX8815A toc17
2V/div
0V
3V
4.2V
3V
1ms/div
LOAD TRANSIENT
V OUT
200mV/div
5V DC OFFSET
500mV/div
MAX8815A toc18
I OUT
800mA
10mA
0A
200 μs/div
STARTUP WAVEFORM
(NO LOAD)
V EN
V OUT
V LX
I LX
MAX8815A toc19
5V/div
5V/div
0V
5V/div
0V
1A/div
0A
Typical Operating Characteristics (continued)
(V OUTS = V POUT = 5V, V BATT = V ON = 3.6V, V SKIPB = GND.)