MAX8643 Maxim Integrated Products, MAX8643 Datasheet - Page 6

• Manufacturer Part Number: MAX8643
• Description: 2MHz Step-Down Regulator
• Manufacturer: Maxim Integrated Products

www.DataSheet4U.com
3A, 2MHz Step-Down Regulator
with Integrated Switches
(Typical values are at V
6
10
_______________________________________________________________________________________
9
8
7
6
5
4
3
2
1
0
2.2
INPUT CURRENT vs. INPUT VOLTAGE
V
EN
2.4
= 0V
2.6
INPUT VOLTAGE (V)
2.8
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.64
0.63
0.62
0.61
0.60
0.59
0.58
0.57
0.56
RMS INPUT CURRENT DURING SHORT CIRCUIT
0
IN
-40
2.0
3.0
FEEDBACK VOLTAGE vs. TEMPERATURE
= V
V
vs. INPUT VOLTAGE (C4 = 0.022μF)
OUT
DD
3.2
= 0V
-15
2.5
= 3.3V, V
3.4
INPUT VOLTAGE (V)
TEMPERATURE (°C)
10
3.6
3.0
OUT
35
= 1.8V, R
Typical Operating Characteristics (continued)
3.5
7
6
5
4
3
2
1
0
60
0.5
CURRENT LIMIT vs. OUTPUT VOLTAGE
FREQ
4.0
85
1.0
= 50kΩ, I
OUTPUT VOLTAGE (V)
1.5
OUT
V
= 3A, and T
PWRGD
V
2.0
REFIN
V
OUT
110
100
I
90
80
70
60
50
40
30
20
10
IN
0
V
3A LOAD
2.5
OUT
EXPOSED PAD TEMPERATURE
vs. AMBIENT TEMPERATURE
= 1.8V
A
SOFT-START WITH REFIN
20
= +25°C, unless otherwise noted.)
V
I
OUT
OUT
MEASURED ON A MAX8643EVKIT
I
IN
TEMPERATURE (°C)
40
200μs/div
HICCUP CURRENT LIMIT
60
80
400μs/div
MAX8643 toc16
100
1A/div
0A
0.5V/div
0V
1V/div
0V
2V/div
0V
MAX8643 toc12
1V/div
0V
5A/div
0A
1A/div
0A