Typical operating characteristics (continued) – Rainbow Electronics MAX763A User Manual
Page 4
MAX748A/MAX763A
3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
4
_______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 3, T
A
= +25°C, V
OUT
= 3.3V, unless otherwise noted.)
MAX763A
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
QUIESCENT SUPPLY CURRENT (mA)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1
2
3 4
5
6
7
8
9 10 11 12
IOUT = 0mA
TA = +125°C
TA = -55°C
TA = +25°C
MAX748A
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
QUIESCENT SUPPLY CURRENT (mA)
5.0
4.0
3.0
2.0
1.0
0
SUPPLY VOLTAGE (V)
0
2
4
6
8
10
12
14
16
IOUT = OmA
TA = +125°C
TA = -55°C
TA = +25°C
PEAK INDUCTOR CURRENT
vs. OUTPUT CURRENT
PEAK INDUCTOR CURRENT (mA)
0
200
400
600
800
1000
0 50 100 150 200 250 300 350 400 450 500 550
OUTPUT CURRENT (mA)
VIN = 11V
VIN = 6V
VIN = 8V
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
OSCILLATOR FREQUENCY (kHz)
100
125
150
250
175
200
225
275
0
2
4
6
8
10
12
14
16
SUPPLY VOLTAGE (V)
MAX748A
MAX763A
OUTPUT VOLTAGE
vs. OUTPUT CURRENT
OUTPUT VOLTAGE (V)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
VIN = 4.0V
VIN = 3.0V
VIN = 3.5V
SHUTDOWN CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
SHUTDOWN CURRENT (
µ
A)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-60 -40 -20
0
20
40 60
80 100 120 140
IOUT = 0mA
V+ = 5V
NOTES 3, 4
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT VOLTAGE (V)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
ILOAD = 200mA
ILOAD = 50mA
ILOAD = 300mA
ILOAD = 500mA
OSCILLATOR FREQUENCY
vs. TEMPERATURE
OSCILATOR FREQUENCY (kHz)
0
50
100
150
200
250
300
-60 -40 -20
0
20
40 60 80 100 120 140
TEMPERATURE (°C)
MAX748A
MAX763A
IOUT = 100mA
V+ = 5V