5V or Adjustable, Low-Voltage,
Step-Up DC-DC Controller
MAX608
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
EXT RISE/FALL TIME vs. SUPPLY VOLTAGE
MAX608-07
REFERENCE OUTPUT RESISTANCE vs.
TEMPERATURE
REFERENCE OUTPUT RESISTANCE (Ω)
MAX608-08
REFERENCE vs. TEMPERATURE
MAX608-09
250
200
250
1.506
1.504
1.502
REFERENCE (V)
1.500
1.498
1.496
1.494
EXT RISE/FALL TIME (ns)
C
EXT
= 2200pF
C
EXT
= 1000pF
C
EXT
= 470pF
C
EXT
= 100pF
200
10µA
150
150
100
100
50µA
100µA
50
50
0
2
4
6
8
10
12
SUPPLY VOLTAGE (V)
0
-60 -40 -20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
1.492
-60 -40 -20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
MAXIMUM SWITCH ON-TIME vs.
TEMPERATURE
MAX608-10
SHUTDOWN CURRENT vs. TEMPERATURE
3.5
SHUTDOWN CURRENT (µA)
3.0
2.5
2.0
1.5
V+ = 8V
1.0
0.5
V+ = 4V
2.20
-60 -40 -20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
V+ = 15V
tOFF(min) (µs)
MAX608-11
MINIMUM SWITCH OFF-TIME vs.
TEMPERATURE
MAX608-12
16.5
4.0
2.30
tON(max) (µs)
16.0
2.25
15.5
-60 -30
0
30
60
90
120 150
TEMPERATURE (°C)
0
-60 -30
0
30
60
90
120 150
TEMPERATURE (°C)
HEAVY-LOAD SWITCHING WAVEFORMS
(V
OUT
= 5V)
A
B
V
OUT
A
0V
I
LIM
B
0A
C
C
MEDIUM-LOAD SWITCHING WAVEFORMS
(V
OUT
= 5V)
V
OUT
0V
I
LIM
0A
2µs/div
V
IN
= 3V, I
OUT
= 930mA, V
OUT
= 5V
A = EXT VOLTAGE, 5V/div
B = INDUCTOR CURRENT, 1A/div
C = V
OUT
RIPPLE, 50mV/div, AC-COUPLED
20µs/div
V
IN
= 3V, I
OUT
= 490mA, V
OUT
= 5V
A = EXT VOLTAGE, 5V/div
B = INDUCTOR CURRENT, 1A/div
C = V
OUT
RIPPLE, 50mV/div, AC-COUPLED
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
