Max1800 digital camera step-up power supply, Typical operating characteristics (continued) – Rainbow Electronics MAX1800 User Manual
Page 7
MAX1800
Digital Camera Step-Up
Power Supply
_______________________________________________________________________________________
7
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
INPUT
= 2.4V, T
A
= +25°C, unless otherwise noted.)
MAX1800 toc18
200
µs/div
LDO
LOAD
CURRENT
100mA/div
MAIN
OUTPUT
VOLTAGE
20mV/div
AC COUPLED
0A
MAIN LOAD = 24
Ω
MAIN OUTPUT RESPONSE DUE
TO LDO TRANSIENT
MAIN OUTPUT LOAD-TRANSIENT
RESPONSE
MAX1800 toc15
400 us/div
I
OUT
200mA/div
V
POUT
AC COUPLED
100mV/div
C
OUT
= 100
µF
0A
V
OUT
= 5V
LOAD = 10
Ω
AUXILIARY CONTROLLER OUTPUT
LOAD-TRANSIENT RESPONSE
MAX1800 toc17
400 us/div
I
OUT
200mA/div
V
POUT
AC COUPLED
100mV/div
V
OUT
= 5V
AUXILIARY CONTROLLER STARTUP
RESPONSE
MAX1800 toc13
1ms/div
V
OUT
2V/div
I
IN
0.5A/div
V
ON_
5V/div
0A
V
OUT
= 5V
LOAD = 10
Ω
0V
3.3V
0V
STARTUP SEQUENCE
MAX1800 toc14
1.00ms/div
V
ONM
5V/div
MAIN
OUTPUT
VOLTAGE
2V/div
LDO
OUTPUT
VOLTAGE
2V/div
AUXILIARY
OUTPUT
VOLTAGE
2V/div
MAIN LOAD = 24
Ω
LDO LOAD = 8
Ω
AUXILIARY LOAD = 10
Ω
AUXILIARY OUTPUT VOLTAGE = 5V
0V
0V
0V
0V
LDO OUTPUT LOAD TRANSIENT
RESPONSE
MAX1800 toc16
100
µs/div
0A
LDO
OUTPUT
VOLTAGE
20mV/div
AC COUPLED
LDO
LOAD
CURRENT
100mA/div