Typical operating characteristics (continued) – Rainbow Electronics MAX1709 User Manual
Page 6
MAX1709
4A, Low-Noise, High-Frequency,
Step-Up DC-DC Converter
6
_______________________________________________________________________________________
2
3
4
5
6
7
8
9
10
50
100
150
200
250
300
SWITCH CURRENT LIMIT
vs. SS/LIM RESISTANCE
MAX1709 TOC10
SS/LIM RESISTANCE (k
Ω)
CURRENT LIMIT (A)
8.0
9.0
8.5
10.0
9.5
11.0
10.5
11.5
-40
10
-15
35
60
85
SWITCH CURRENT LIMIT
vs. TEMPERATURE
MAX1709-12
TEMPERATURE (
°C)
CURRENT LIMIT (A)
V
OUT
= 3.3V
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
LINE-TRANSIENT
RESPONSE
MAX1709-14
3V
3.5V
5V
I
OUT
= 1A
100
µs/div
V
OUT
50mV/div
V
IN
0.5V/div
LOAD-TRANSIENT
RESPONSE
MAX1709-15
1A
3A
5V
20
µs/div
I
L
2A/div
I
OUT
2A/div
6A
4A
2A
V
OUT
100mV/div
SHUTDOWN WITH SOFT-START
(C
SS
= 0.1
µF)
MAX1709-16
5V
0
1ms/div
V
OUT
2V/div
V
ONA
5V/div
2A
0
4V
I
IN
2A/div
4A
2V
C
SS
= 0.1
µF
R
OUT
= 5
Ω
V
ONB
= V
OUT
HEAVY SWITCHING WAVEFORM
MAX1709-13a
5V
5V
0
4A
2A
I
OUT
= 2A
1
µs/div
I
L
2A/div
V
OUT
100mV/div
V
LX
5V/div
HEAVY SWITCHING WAVEFORM
(WITH LC FILTER)
MAX1709-13b
5V
5V
0
4A
2A
I
OUT
= 2A
L = 12.5nH (COILCRAFT A04T)
C = 1
µF
1
µs/div
I
L
2A/div
V
OUT
100mV/div
V
LX
5V/div