Rainbow Electronics MAX744A - Manual (Page 5)

MAX730A/MAX738A/MAX744A
5V, Step-Down,
Current-Mode PWM DC-DC Converters
_______________________________________________________________________________________ 5
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 3, T
A
= +25°C, unless otherwise noted.)
4 6 8 10 14
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
OSCILLATOR FREQUENCY vs.
SUPPLY VOLTAGE
12 16
MAX744A
MAX738A
MAX730A
( NOTE 3)
220
170
160
150
180
190
200
210
210
190
180
-60 20 40 80 120
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
MAX744A
OSCILLATOR FREQUENCY
vs. TEMPERATURE
200
170
-40 -20 0 60 100 140 160
V+ = 6.0V
V+ = 16.0V
V+ = 9.0V
V+ = 12.0V
(NOTE 4)
200
180
170
160
-60 20 40 80 120
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
MAX738A
OSCILLATOR FREQUENCY
vs. TEMPERATURE
190
140
-40 -20 0 60 100 140 160
150
130
120
V+ = 6.0V
V+ = 16.0V
V+ = 12.0V
V+ = 9.0V
(NOTE 4)
-60 20 40 80 120
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
MAX730A
OSCILLATOR FREQUENCY
vs. TEMPERATURE
-40 -20 0 60 100 140 160
240
200
180
160
220
0
140
V+ = 9.0V
V+ = 7.0V
(NOTE 4)
V+ = 5.5V
V+ = 11.0V
Note 3: Commercial temperature range external component values in Table 3.
Note 4: Wide temperature range external component values in Table 3.
Note 5: Standby and shutdown current includes all external component leakage currents. Capacitor leakage currents dominate at T A > +85°C,
Sanyo OS-CON capacitors were used.
Note 6: Operation beyond the specifications listed in the electrical characteristics may exceed the power dissipation ratings of the device.