MAX8646 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX8646 Datasheet PDF : 16 Pages
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6A, 2MHz Step-Down Regulator
with Integrated Switches
Typical Operating Characteristics (continued)
(Typical values are: VIN = VDD = 3.3V; VOUT = 1.8V, RFREQ = 50kΩ, IOUT = 6A, and TA = +25°C, unless otherwise noted.)
INPUT CURRENT vs. INPUT VOLTAGE
10
9
8
7
6
5
4
3
2
1
VEN = 0V
0
2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
INPUT VOLTAGE (V)
CURRENT LIMIT vs. OUTPUT VOLTAGE
9
8
VOUT
7
6
IOUT
5
4
3
IIN
2
0.5
1.0
1.5
2.0
2.5
OUTPUT VOLTAGE (V)
HICCUP CURRENT LIMIT
MAX8646 toc12
1V/div
0V
5A/div
0A
400µs/div
1A/div
0A
RMS INPUT CURRENT DURING SHORT-CIRCUIT
vs. INPUT VOLTAGE (C4 = 0.022µF)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
VOUT = 0V
0
2.0
2.5
3.0
3.5
4.0
INPUT VOLTAGE (V)
EXPOSED PAD TEMPERATURE
vs. AMBIENT TEMPERATURE
120
110 VOUT = 1.8V
6A LOAD
100
90
80
70
60
50
40
30
20
MEASURED ON A MAX8646 EV KIT
10
0
20
40
60
80 100
TEMPERATURE (°C)
FEEDBACK VOLTAGE vs. TEMPERATURE
0.64
0.63
0.62
0.61
0.60
0.59
0.58
0.57
0.56
-40 -15
10
35
60
85
TEMPERATURE (°C)
IIN
VREFIN
VOUT
VPWRGD
SOFT-START WITH REFIN
MAX8646 toc16
1A/div
0A
0.5V/div
0V
200µs/div
1V/div
0V
2V/div
0V
STARTING INTO PREBIASED OUTPUT
MAX8646 toc17
2V/div
VEN
0V
VOUT
VPWRGD
1V/div
0V
2V/div
0V
100µs/div
CSS = 6800pF, CO = 122µF, L = 0.56µH, VOUT = 2.5V
6 _______________________________________________________________________________________
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