max738a Maxim Integrated Products, Inc., max738a Datasheet - Page 4

• Manufacturer Part Number: max738a
• Description: 5v, Step-down, Current-mode Pwm Dc-dc Converters
• Manufacturer: Maxim Integrated Products, Inc.

5V, Step-Down,
Current-Mode PWM DC-DC Converters
(Circuit of Figure 3, T
4
__________________________________________Typical Operating Characteristics
1400
1200
1000
800
1.0
2.5
2.0
1.5
0.5
100
_______________________________________________________________________________________
0
90
80
70
60
4
0
0
MAX744A
(NOTES 3, 6)
MAXIMUM OUTPUT CURRENT vs.
EFFICIENCY vs. OUTPUT CURRENT
2
6
UNDERVOLTAGE
LOCKOUT ENABLED
QUIESCENT SUPPLY CURRENT
200
4
SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
OUTPUT CURRENT (mA)
vs. SUPPLY VOLTAGE
MAX738A/MAX744A
V+ = 5.5V
V+ = 7V
V+ = 9V
V+ = 11V
8
6
MAX730A
400
MAX730A
A
UNDERVOLTAGE
LOCKOUT HYSTERESIS
10
8
= +25°C, unless otherwise noted.)
600
10
MAX738A
12
(NOTES 3, 6)
12
800
14
14
16
16
1000
1400
1200
1000
1000
800
600
400
200
800
600
400
200
100
0
90
80
70
60
4
0
0
MAX730A
MAXIMUM OUTPUT CURRENT vs.
V+ = 6.6V
100
EFFICIENCY vs. OUTPUT CURRENT
6
SUPPLY VOLTAGE, NO R1
PEAK INDUCTOR CURRENT
200
200
MAX744A
vs. OUTPUT CURRENT
MAX738A/MAX744A
SUPPLY VOLTAGE (V)
OUTPUT CURRENT (mA)
V+ = 6V
V+ = 8V
V+ = 12V
V+ = 16V
8
300 400 500
400
MAX738A
10
V+ = 8.0V TO 16.0V
600
(NOTES 3, 6)
12
L1 = 100 H
C4 = 150 F
(NOTES 3, 6)
MAX738A
600 700 800
800
14
16
1000
3.0
2.5
2.0
1.5
1.0
0.5
100
20
18
16
14
12
10
90
80
70
60
0
8
6
4
2
0
-60
-60
0
-40 -20 0
-40 -20
MAX730A, V+ = 9.0V
MAX738A, V+ = 12.0V
MAX744A, V+ = 12.0V
V+ = 16V
MAX738A/MAX744A
ONLY
EFFICIENCY vs. OUTPUT CURRENT
QUIESCENT SUPPLY CURRENT
STANDBY SUPPLY CURRENT
200
V+ = 12V
MAX738A/MAX744A
ONLY
vs. TEMPERATURE
0
vs. TEMPERATURE
OUTPUT CURRENT (mA)
V+ = 6.0V
V+ = 9.0V
V+ = 12.0V
V+ = 16.0V
TEMPERATURE (°C)
20 40
20 40
400
V+ = 9V
MAX744A
V+ = 6V
60
60 80 100
600
80
(NOTES 4, 5)
100
(NOTES 4, 5)
120
800
(NOTE 3)
120 140 160
140 160
1000