MAX618 Maxim, MAX618 Datasheet - Page 4

• Manufacturer Part Number: MAX618
• Description: 28V / PWM / Step-Up DC-DC Converter
• Manufacturer: Maxim

(100mV/div)
(200mV/div)
(100mA/div)
28V, PWM, Step-Up DC-DC Converter
(Circuit of Figure 1, T
4
(10V/div)
(1A/div)
0.65
0.60
0.55
0.50
0.45
0.40
V
V
V
OUT
I
_______________________________________________________________________________________
OUT
OUT
LX
I
L
0
V
V
IN
IN
= 5V, V
= 5V, V
NO-LOAD SUPPLY CURRENT
5
LOAD-TRANSIENT RESPONSE
MEDIUM-LOAD SWITCHING
OUT
vs. INPUT VOLTAGE
OUT
INPUT VOLTAGE (V)
10
= 12V, I
= 12V
WAVEFORMS
2 s/div
A
5ms/div
OUT
15
= +25°C.)
= 200mA
20
25
MAX618 toc07
MAX618 toc10
30
0
0
(10V/div)
(100mV/
(2V/div)
(2V/div)
(1A/div)
SHDN
V
700
650
600
550
500
450
400
350
300
V
OUT
div)
V
OUT
LX
Typical Operating Characteristics (continued)
I
-50
L
V
SUPPLY CURRENT vs. TEMPERATURE
V
IN
IN
= 5V, V
INCLUDES CAPACITOR LEAKAGE CURRENT
-30
= 5V, V
HEAVY-LOAD SWITCHING
SHUTDOWN RESPONSE
-10
OUT
OUT
TEMPERATURE (°C)
= 12V, I
= 12V, I
WAVEFORMS
10
500 s/div
2 s/div
LOAD
OUT
30
= 500mA
= 500mA
50
V
V
IN
70
IN
V
IN
= 5V
= 3V
MAX618 toc11
= 8V
MAX618 toc08
90
110
0
12V
5V
0
(50mV/div)
(5V/div)
V
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
OUT
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
V
0
IN
0
I
2
2
OUT
= 200mA, V
V
3
OUT
MAXIMUM OUTPUT CURRENT
LINE-TRANSIENT RESPONSE
7
4
= 12V
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
vs. INPUT VOLTAGE
SUPPLY VOLTAGE (V)
5
INPUT VOLTAGE (V)
12
OUT
6
= 12V
2ms/div
17
7
8
22
9
10 11 12
MAX618 toc09
27
32
6V
3V