Datasheet

MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CC
= 5V, V
OUT
= 30V, T
A
= +25°C, unless otherwise noted.)
MAX5025-28 toc17
LX PIN
20V/div
V
OUT
1mV/div
AC-COUPLED
I
L
200mA/div
0V
0mA
1μs/div
MAX5026, V
CC
= 5V, V
OUT
= 30V, I
LOAD
= 4mA.
CIRCUIT OF FIGURE 3
HEAVY-LOAD SWITCHING WAVEFORM
WITH RC FILTER
LOAD TRANSIENT RESPONSE
MAX5025-28 toc18
OUTPUT
VOLTAGE
200mV/div
AC-COUPLED
LOAD
CURRENT
10mA/div
0mV
0mA
1ms/div
MAX5026, V
CC
= 5V, V
OUT
= 30V, I
LOAD
= 0 TO 4mA.
CIRCUIT OF FIGURE 2
LINE TRANSIENT RESPONSE
MAX5025-28 toc19
OUTPUT
VOLTAGE
1mV/div
AC-COUPLED
INPUT
VOLTAGE
100mV/div
AC-COUPLED
0mV
0mV
2ms/div
MAX5026, V
CC
= 5V TO 5.2V, V
OUT
= 30V, I
LOAD
= 1mA.
CIRCUIT OF FIGURE 2
MAX5025-28 toc20
1.230
1.235
1.245
1.240
1.260
1.265
1.255
1.250
1.270
FB PIN VOLTAGE (V)
-40 0 20-20
40
60
80
TEMPERATURE (°C)
MAX5026
FB PIN VOLTAGE vs. TEMPERATURE
V
CC
= 11V
V
CC
= 5V
V
CC
= 3V
29.0
29.4
29.2
29.8
29.6
30.2
30.0
30.4
-40 0 20-20 40 60 80
MAX5025-28 toc21
TEMPERATURE (°C)
FB PIN VOLTAGE (V)
MAX5028
FB PIN VOLTAGE vs. TEMPERATURE
V
CC
= 11V
V
CC
= 5V
V
CC
= 3V
MAX5025-28 toc16
LX PIN
20V/div
V
OUT
5mV/div
AC-COUPLED
I
L
200mA/div
0V
0mA
1μs/div
MAX5026, V
CC
= 5V, V
OUT
= 30V, I
LOAD
= 4mA.
CIRCUIT OF FIGURE 2
HEAVY-LOAD SWITCHING WAVEFORM
WITHOUT RC FILTER