MAX669 MAXIM [Maxim Integrated Products], MAX669 Datasheet - Page 7

• Manufacturer Part Number: MAX669
• Description: 1.8V to 28V Input, PWM Step-Up Controllers in ?MAX
• Manufacturer: MAXIM [Maxim Integrated Products]

(Circuits of Figures 2, 3, 4, and 5; T
AC-COUPLED
AC-COUPLED
SHUTDOWN
INDUCTOR
200mV/div
100mV/div
Q1, DRAIN
CURRENT
CURRENT
VOLTAGE
VOLTAGE
VOLTAGE
OUTPUT
OUTPUT
5V/div
2A/div
5V/div
5V/div
1A/div
1A/div
LOAD
V
OUT
I
L
MAX668, V
LOW VOLTAGE, NON-BOOTSTRAPPED
MAX668, V
LOW VOLTAGE, NON-BOOTSTRAPPED
MAX668, V
LOW VOLTAGE, NON-BOOTSTRAPPED
HEAVY-LOAD SWITCHING WAVEFORM
_______________________________________________________________________________________
LOAD-TRANSIENT RESPONSE
IN
IN
IN
EXITING SHUTDOWN
= 5V, V
= 5V, V
= 5V, V
500 s/div
1ms/div
1 s/div
OUT
OUT
OUT
= 12V, I
= 12V, LOAD = 1.0A, R
= 12V, I
A
= +25°C; unless otherwise noted.)
LOAD
LOAD
= 0.1A TO 1.0A,
= 1.0A,
1.8V to 28V Input, PWM Step-Up
Typical Operating Characteristics (continued)
OSC
= 100k ,
0V
0A
0V
0V
0A
AC-COUPLED
AC-COUPLED
SHUTDOWN
100mV/div
100mV/div
Q1, DRAIN
VOLTAGE
VOLTAGE
VOLTAGE
VOLTAGE
Controllers in µMAX
OUTPUT
OUTPUT
5V/div
INPUT
5V/div
5V/div
5V/div
1A/div
V
OUT
I
L
MAX668, V
HIGH VOLTAGE, NON-BOOTSTRAPPED
MAX668, V
LOW VOLTAGE, NON-BOOTSTRAPPED
MAX668, V
LOW VOLTAGE, NON-BOOTSTRAPPED
LIGHT-LOAD SWITCHING WAVEFORM
LINE-TRANSIENT RESPONSE
IN
IN
ENTERING SHUTDOWN
IN
= 5V TO 8V, V
= 5V, V
= 5V, V
20ms/div
1 s/div
200 s/div
OUT
OUT
= 12V, I
= 12V, LOAD = 1.0A,
OUT
= 12V, LOAD = 1.0A,
LOAD
= 0.1A,
0V
0V
0A
0V
0V
7