MAX1966 Maxim, MAX1966 Datasheet - Page 5

• Manufacturer Part Number: MAX1966
• Description: Low-Cost Voltage-Mode PWM Step-Down Controllers
• Manufacturer: Maxim

(T
A
100
= +25°C, unless otherwise noted.)
90
80
70
60
50
0.01
EFFICIENCY vs. LOAD CURRENT (3.3V/5A)
INDUCTOR
CURRENT
V
IN
V
I
OUT
OUT
= 12V
10
8
6
4
2
0
V
IN
2.5
= 5V
V
L = 22 H
I
LOAD
IN
LOAD CURRENT (A)
0.1
= 5.0V, V
_______________________________________________________________________________________
MAX1967
MAX1966 SUPPLY CURRENT
= 0.1 TO 3A
3.0
LOAD STEP RESPONSE
vs. INPUT VOLTAGE
OUT
INPUT VOLTAGE (V)
3.5
= 1.8V
V
1
400ms/div
IN
= 24V
4.0
MAX1967
FIGURE 2
4.5
MAX1966
V
10
OUT
5.0
= 1.8V
Typical Operating Characteristics (continued)
104
102
100
5.5
98
200mV/div
2A/div
2A/div
Low-Cost Voltage-Mode PWM
2.5
FREQUENCY vs. INPUT VOLTAGE
7.0
MAX1966
V
OUT
INPUT VOLTAGE (V)
11.5
= 1.8V
16.0
Step-Down Controllers
INDUCTOR
CURRENT
V
MAX1967
OUT
20.5
V
OUT
= 3.3V
V
10
IN
8
6
4
2
0
4
25.0
MAX1967 SUPPLY CURRENT
START-UP WAVEFORM
9
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
130
120
110
100
2ms/div
90
80
14
-40 -25
FREQUENCY vs. TEMPERATURE
19
MAX1967
V
OUT
-10
NO LOAD
= 3.3V
TEMPERATURE ( C)
24
5
20
2V/div
1V/div
1A/div
35
50
65
80
5